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21
.forgejo/workflows/dco.yml Normal file
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name: DCO action
on: [pull_request]
jobs:
dco:
name: DCO
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
with:
fetch-depth: 0
- name: Setup Go
uses: actions/setup-go@v3
with:
go-version: '1.22'
- name: Run commit format checker
uses: https://git.frostfs.info/TrueCloudLab/dco-go@v3
with:
from: 'origin/${{ github.event.pull_request.base.ref }}'

73
.forgejo/workflows/tests.yml Normal file
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name: Tests and linters
on: [pull_request]
jobs:
lint:
name: Lint
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: Set up Go
uses: actions/setup-go@v3
with:
go-version: '1.22'
cache: true
- name: Install linters
run: make lint-install
- name: Run linters
run: make lint
tests:
name: Tests
runs-on: ubuntu-latest
strategy:
matrix:
go_versions: [ '1.21', '1.22' ]
fail-fast: false
steps:
- uses: actions/checkout@v3
- name: Set up Go
uses: actions/setup-go@v3
with:
go-version: '${{ matrix.go_versions }}'
cache: true
- name: Run tests
run: make test
tests-race:
name: Tests with -race
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: Set up Go
uses: actions/setup-go@v3
with:
go-version: '1.22'
cache: true
- name: Run tests
run: go test ./... -count=1 -race
staticcheck:
name: Staticcheck
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: Set up Go
uses: actions/setup-go@v3
with:
go-version: '1.22'
cache: true
- name: Install staticcheck
run: make staticcheck-install
- name: Run staticcheck
run: make staticcheck-run

2
.gitattributes vendored Normal file
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/**/*.pb.go -diff -merge
/**/*.pb.go linguist-generated=true

51
.gitignore vendored Normal file
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# IDE
.idea
.vscode
# Vendoring
vendor
# tempfiles
.DS_Store
*~
.cache
temp
tmp
# binary
bin/
release/
# coverage
coverage.txt
coverage.html
# testing
cmd/test
/plugins/
testfile
# misc
.neofs-cli.yml
# debhelpers
debian/*debhelper*
# logfiles
debian/*.log
# .substvars
debian/*.substvars
# .bash-completion
debian/*.bash-completion
# Install folders and files
debian/frostfs-cli/
debian/frostfs-ir/
debian/files
debian/frostfs-storage/
debian/changelog
man/
debs/

66
.golangci.yml Normal file
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# This file contains all available configuration options
# with their default values.
# options for analysis running
run:
# timeout for analysis, e.g. 30s, 5m, default is 1m
timeout: 10m
# include test files or not, default is true
tests: false
# output configuration options
output:
# colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
format: tab
# all available settings of specific linters
linters-settings:
exhaustive:
# indicates that switch statements are to be considered exhaustive if a
# 'default' case is present, even if all enum members aren't listed in the
# switch
default-signifies-exhaustive: true
govet:
# report about shadowed variables
check-shadowing: false
staticcheck:
checks: ["all"]
funlen:
lines: 80 # default 60
statements: 60 # default 40
gocognit:
min-complexity: 40 # default 30
linters:
enable:
# mandatory linters
- govet
- revive
# some default golangci-lint linters
- errcheck
- gosimple
- godot
- ineffassign
- staticcheck
- typecheck
- unused
# extra linters
- bidichk
- durationcheck
- exhaustive
- exportloopref
- gofumpt
- goimports
- misspell
- predeclared
- reassign
- whitespace
- containedctx
- funlen
- gocognit
- contextcheck
disable-all: true
fast: false

38
.pre-commit-config.yaml Normal file
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ci:
autofix_prs: false
repos:
- repo: https://github.com/pre-commit/pre-commit-hooks
rev: v4.4.0
hooks:
- id: check-added-large-files
- id: check-case-conflict
- id: check-executables-have-shebangs
- id: check-shebang-scripts-are-executable
- id: check-merge-conflict
- id: check-json
- id: check-xml
- id: check-yaml
- id: trailing-whitespace
args: [--markdown-linebreak-ext=md]
- id: end-of-file-fixer
exclude: ".key$"
- repo: https://github.com/shellcheck-py/shellcheck-py
rev: v0.9.0.2
hooks:
- id: shellcheck
- repo: https://github.com/golangci/golangci-lint
rev: v1.59.1
hooks:
- id: golangci-lint
- repo: local
hooks:
- id: go-unit-tests
name: go unit tests
entry: make test GOFLAGS=''
pass_filenames: false
types: [go]
language: system

201
LICENSE Normal file
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@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
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"You" (or "Your") shall mean an individual or Legal Entity
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whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
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work stoppage, computer failure or malfunction, or any and all
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has been advised of the possibility of such damages.
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the Work or Derivative Works thereof, You may choose to offer,
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License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
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Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

64
Makefile Executable file
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@ -0,0 +1,64 @@
#!/usr/bin/make -f
SHELL = bash
TRUECLOUDLAB_LINT_VERSION ?= 0.0.3
TMP_DIR := .cache
OUTPUT_LINT_DIR ?= $(shell pwd)/bin
LINT_VERSION ?= 1.59.1
LINT_DIR = $(OUTPUT_LINT_DIR)/golangci-lint-$(LINT_VERSION)-v$(TRUECLOUDLAB_LINT_VERSION)
# Run all code formatters
fmts: fmt imports
# Reformat code
fmt:
@echo "⇒ Processing gofmt check"
@gofumpt -s -w .
# Reformat imports
imports:
@echo "⇒ Processing goimports check"
@goimports -w .
# Run Unit Test with go test
test: GOFLAGS ?= "-count=1"
test:
@echo "⇒ Running go test"
@GOFLAGS="$(GOFLAGS)" go test ./...
# Activate pre-commit hooks
pre-commit:
pre-commit install -t pre-commit -t commit-msg
# Deactivate pre-commit hooks
unpre-commit:
pre-commit uninstall -t pre-commit -t commit-msg
pre-commit-run:
@pre-commit run -a --hook-stage manual
# Install linters
lint-install:
@mkdir -p $(TMP_DIR)
@rm -rf $(TMP_DIR)/linters
@git -c advice.detachedHead=false clone --branch v$(TRUECLOUDLAB_LINT_VERSION) https://git.frostfs.info/TrueCloudLab/linters.git $(TMP_DIR)/linters
@make -C $(TMP_DIR)/linters lib CGO_ENABLED=1 OUT_DIR=$(OUTPUT_LINT_DIR)
@rm -rf $(TMP_DIR)/linters
@rmdir $(TMP_DIR) 2>/dev/null || true
@CGO_ENABLED=1 GOBIN=$(LINT_DIR) go install github.com/golangci/golangci-lint/cmd/golangci-lint@v$(LINT_VERSION)
# Run linters
lint:
@if [ ! -d "$(LINT_DIR)" ]; then \
echo "Run make lint-install"; \
exit 1; \
fi
@$(LINT_DIR)/golangci-lint run
# Install staticcheck
staticcheck-install:
@go install honnef.co/go/tools/cmd/staticcheck@latest
# Run staticcheck
staticcheck-run:
@staticcheck ./...

23
README.md
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@ -1,3 +1,22 @@
# WIP area: this repo is just a fork! # Helper Go libraries for working with metrics, traces and logging
Useful things may be published only in [other branches](../../../branches) See package documentation
at [pkg.go.dev](https://pkg.go.dev/git.frostfs.info/TrueCloudLab/frostfs-observability)
## License and copyright
Copyright 2023-2024 FrostFS contributors
```
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
```

47
go.mod Normal file
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module git.frostfs.info/TrueCloudLab/frostfs-observability
go 1.21
require (
github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus v1.0.0-rc.0
github.com/prometheus/client_golang v1.15.1
github.com/prometheus/client_model v0.3.0
github.com/stretchr/testify v1.9.0
go.opentelemetry.io/otel v1.28.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.28.0
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.28.0
go.opentelemetry.io/otel/sdk v1.28.0
go.opentelemetry.io/otel/trace v1.28.0
google.golang.org/grpc v1.64.0
google.golang.org/protobuf v1.34.2
)
require (
github.com/google/uuid v1.6.0 // indirect
go.uber.org/multierr v1.10.0 // indirect
)
require (
github.com/beorn7/perks v1.0.1 // indirect
github.com/cenkalti/backoff/v4 v4.3.0 // indirect
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/go-logr/logr v1.4.2 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/golang/protobuf v1.5.4 // indirect
github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.0.0-rc.3 // indirect
github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 // indirect
github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/prometheus/common v0.42.0 // indirect
github.com/prometheus/procfs v0.9.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 // indirect
go.opentelemetry.io/otel/metric v1.28.0 // indirect
go.opentelemetry.io/proto/otlp v1.3.1 // indirect
go.uber.org/zap v1.26.0
golang.org/x/net v0.26.0 // indirect
golang.org/x/sys v0.22.0 // indirect
golang.org/x/text v0.16.0 // indirect
google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

458
go.sum Normal file
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@ -0,0 +1,458 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
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github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
go.opentelemetry.io/otel v1.28.0 h1:/SqNcYk+idO0CxKEUOtKQClMK/MimZihKYMruSMViUo=
go.opentelemetry.io/otel v1.28.0/go.mod h1:q68ijF8Fc8CnMHKyzqL6akLO46ePnjkgfIMIjUIX9z4=
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go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0/go.mod h1:s75jGIWA9OfCMzF0xr+ZgfrB5FEbbV7UuYo32ahUiFI=
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go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.28.0/go.mod h1:Ea1N1QQryNXpCD0I1fdLibBAIpQuBkznMmkdKrapk1Y=
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go.opentelemetry.io/otel/metric v1.28.0/go.mod h1:Fb1eVBFZmLVTMb6PPohq3TO9IIhUisDsbJoL/+uQW4s=
go.opentelemetry.io/otel/sdk v1.28.0 h1:b9d7hIry8yZsgtbmM0DKyPWMMUMlK9NEKuIG4aBqWyE=
go.opentelemetry.io/otel/sdk v1.28.0/go.mod h1:oYj7ClPUA7Iw3m+r7GeEjz0qckQRJK2B8zjcZEfu7Pg=
go.opentelemetry.io/otel/trace v1.28.0 h1:GhQ9cUuQGmNDd5BTCP2dAvv75RdMxEfTmYejp+lkx9g=
go.opentelemetry.io/otel/trace v1.28.0/go.mod h1:jPyXzNPg6da9+38HEwElrQiHlVMTnVfM3/yv2OlIHaI=
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go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
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go.uber.org/multierr v1.10.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
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golang.org/x/exp v0.0.0-20191030013958-a1ab85dbe136/go.mod h1:JXzH8nQsPlswgeRAPE3MuO9GYsAcnJvJ4vnMwN/5qkY=
golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
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golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
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golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/net v0.0.0-20210423184538-5f58ad60dda6/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20191202225959-858c2ad4c8b6/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20210413134643-5e61552d6c78/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
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golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200806141610-86f49bd18e98/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 h1:DdoeryqhaXp1LtT/emMP1BRJPHHKFi5akj/nbx/zNTA=
google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4/go.mod h1:NWraEVixdDnqcqQ30jipen1STv2r/n24Wb7twVTGR4s=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.37.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
google.golang.org/grpc v1.64.0 h1:KH3VH9y/MgNQg1dE7b3XfVK0GsPSIzJwdF617gUSbvY=
google.golang.org/grpc v1.64.0/go.mod h1:oxjF8E3FBnjp+/gVFYdWacaLDx9na1aqy9oovLpxQYg=
google.golang.org/grpc/examples v0.0.0-20210424002626-9572fd6faeae/go.mod h1:Ly7ZA/ARzg8fnPU9TyZIxoz33sEUuWX7txiqs8lPTgE=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

67
logging/lokicore/core.go Normal file
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package lokicore
import (
"time"
"git.frostfs.info/TrueCloudLab/frostfs-observability/logging/lokicore/loki"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
// Zap Core for loki.
// Expands the zapcore.Core interface with calls to export logs to Loki.
type LokiCore struct {
original zapcore.Core
encoder zapcore.Encoder
loki *loki.Client
}
func New(original zapcore.Core, lokiCfg loki.Config) *LokiCore {
encoderConfig := zap.NewProductionEncoderConfig()
encoder := zapcore.NewJSONEncoder(encoderConfig)
encoderConfig.EncodeTime = zapcore.TimeEncoderOfLayout(time.RFC3339Nano)
return &LokiCore{
original: original,
encoder: encoder,
loki: loki.Setup(lokiCfg),
}
}
func (c *LokiCore) With(fields []zapcore.Field) zapcore.Core {
return &LokiCore{
original: c.original.With(fields),
encoder: c.encoder,
loki: c.loki,
}
}
func (c *LokiCore) Write(entry zapcore.Entry, fields []zapcore.Field) error {
if err := c.original.Write(entry, fields); err != nil {
return err
}
buffer, err := c.encoder.EncodeEntry(entry, fields)
defer buffer.Free()
if err != nil {
return err
}
return c.loki.Send(buffer.String(), entry.Time)
}
func (c *LokiCore) Check(entry zapcore.Entry, checked *zapcore.CheckedEntry) *zapcore.CheckedEntry {
if c.Enabled(entry.Level) {
return checked.AddCore(entry, c)
}
return checked
}
func (c *LokiCore) Sync() error {
return c.original.Sync()
}
func (c *LokiCore) Enabled(level zapcore.Level) bool {
return c.original.Enabled(level)
}

32
logging/lokicore/loki/README.md Normal file
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@ -0,0 +1,32 @@
# git.frostfs.info/TrueCloudLab/frostfs-observability/loki"
A simple asynchronous client in Go for sending logs to Loki.
## Usage
```go
package main
import (
"time"
"git.frostfs.info/TrueCloudLab/frostfs-observability/logging/lokicore/loki"
)
func main() {
loki := loki.Setup(loki.Config{
Address: "localhost:3100/api/prom/push",
Labels: map[string]string{
"label": "test",
},
BatchWait: 1000,
BatchEntriesNumber: 200,
Enabled: true,
})
defer loki.Shutdown()
loki.Send("log message", time.Now())
}
```

50
logging/lokicore/loki/example/main.go Normal file
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@ -0,0 +1,50 @@
package main
import (
"fmt"
"os"
"strconv"
"sync"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-observability/logging/lokicore/loki"
)
var wg sync.WaitGroup
const (
countMsgGroup = 100
countMsg = 500000
)
func send(loki *loki.Client) {
wg.Add(1)
defer wg.Done()
for j := 0; j < countMsg/countMsgGroup; j++ {
for i := 0; i < countMsgGroup; i++ {
err := loki.Send(strconv.Itoa(j)+" "+strconv.Itoa(i)+" test log message", time.Now())
if err != nil {
fmt.Fprintf(os.Stderr, "send: %v", err)
}
}
time.Sleep(20 * time.Millisecond)
}
}
func main() {
loki := loki.Setup(loki.Config{
Endpoint: "localhost:3100/api/prom/push",
Labels: map[string]string{
"label": "test",
},
BatchWait: 1000,
BatchEntriesNumber: 200,
Enabled: true,
})
go send(loki)
send(loki)
wg.Wait()
loki.Shutdown()
}

108
logging/lokicore/loki/log.go Normal file
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package loki
import (
"errors"
"strconv"
"time"
)
// Send sends the message to the loki server.
// If the client is disabled, it returns error.
// If the entries channel is full, the message is discarded and returns error.
func (client *Client) Send(msg string, timestamp time.Time) error {
if !client.IsEnabled() {
client.missedMessages++
return errors.New("client disabled")
}
if client.addToEntries(timestamp, msg) {
if client.missedMessages > 0 {
client.addToEntries(time.Now(), strconv.FormatInt(client.missedMessages, 10)+" messages missed")
client.missedMessages = 0
}
} else {
client.missedMessages++
return errors.New("channel is full")
}
return nil
}
// addToEntries attempts to add a log entry to the entries channel.
// It returns true if the entry was added successfully, and false otherwise.
func (client *Client) addToEntries(timestamp time.Time, msg string) bool {
select {
case client.entries <- logEntry{
Ts: timestamp,
Line: msg,
}:
return true
default:
return false
}
}
// run manages the sending of log batches to Loki.
// It collects log entries into batches and sends them either when a batch is full,
// or when the maximum wait time has elapsed.
func (client *Client) run() {
if !client.IsEnabled() {
client.drainEntries()
return
}
client.waitGroup.Add(1)
defer client.waitGroup.Done()
var batch []logEntry
maxWait := time.NewTimer(client.config.BatchWait)
for {
select {
case <-client.quit:
for len(client.entries) > 0 {
entry := <-client.entries
batch = append(batch, entry)
}
batch = client.processMissedMessages(batch)
client.processBatch(batch)
return
case entry := <-client.entries:
batch = append(batch, entry)
if len(batch) >= client.config.BatchEntriesNumber {
batch = client.processBatch(batch)
maxWait.Reset(client.config.BatchWait)
}
case <-maxWait.C:
batch = client.processBatch(batch)
maxWait.Reset(client.config.BatchWait)
}
}
}
func (client *Client) drainEntries() {
for len(client.entries) > 0 {
<-client.entries
}
}
func (client *Client) processBatch(batch []logEntry) []logEntry {
if len(batch) > 0 {
client.sendLogs(batch)
batch = batch[:0]
}
return batch
}
func (client *Client) processMissedMessages(batch []logEntry) []logEntry {
if client.missedMessages > 0 {
batch = append(batch, logEntry{
Ts: time.Now(),
Line: strconv.FormatInt(client.missedMessages, 10) + " messages missed",
})
client.missedMessages = 0
}
return batch
}

66
logging/lokicore/loki/send.go Normal file
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@ -0,0 +1,66 @@
package loki
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"strings"
)
func (client *Client) sendLogs(entries []logEntry) {
if len(entries) == 0 {
return
}
var streams []stream
stream := stream{
Labels: client.config.Labels,
Entries: entries,
}
streams = append(streams, stream)
msg := promtailMsg{Streams: streams}
jsonMsg, err := json.Marshal(msg)
if err != nil {
return
}
client.mutex.RLock()
endpoint := client.config.Endpoint
client.mutex.RUnlock()
client.sendRequest("POST", endpoint, "application/json", jsonMsg)
}
func (client *Client) sendRequest(method, url string, ctype string, reqBody []byte) {
req, err := http.NewRequest(method, url, bytes.NewBuffer(reqBody))
if err != nil {
return
}
req.Header.Set("Content-Type", ctype)
resp, _ := client.client.Do(req)
if resp != nil {
defer resp.Body.Close()
}
}
func (p *stream) MarshalJSON() ([]byte, error) {
return json.Marshal(&struct {
Labels string `json:"labels"`
Entries []logEntry `json:"entries"`
}{
Labels: p.Labels.String(),
Entries: p.Entries,
})
}
func (l labels) String() string {
var labelPairs []string
for key, value := range l {
labelPairs = append(labelPairs, fmt.Sprintf(`%s="%s"`, key, value))
}
return fmt.Sprintf("{%s}", strings.Join(labelPairs, ","))
}

96
logging/lokicore/loki/setup.go Normal file
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@ -0,0 +1,96 @@
package loki
import (
"net/http"
"regexp"
"sync"
"time"
)
const logEntriesChanSize = 5000
// Represents a single log entry.
type logEntry struct {
Ts time.Time `json:"ts"`
Line string `json:"line"`
}
type labels map[string]string
// Stream represents a stream of log entries with associated labels.
type stream struct {
Labels labels `json:"-"`
Entries []logEntry `json:"entries"`
}
type promtailMsg struct {
Streams []stream `json:"streams"`
}
// Client is a client for sending log entries.
type Client struct {
config Config
quit chan struct{}
entries chan logEntry
waitGroup sync.WaitGroup
client http.Client
missedMessages int64
mutex sync.RWMutex
}
type Config struct {
Enabled bool
// E.g. localhost:3100/api/prom/push.
Endpoint string
Labels map[string]string
// Maximum message buffering time.
BatchWait time.Duration
// Maximum number of messages in the queue.
BatchEntriesNumber int
}
// Setup initializes the client with the given configuration and starts the processing goroutine.
// It is the caller's responsibility to call Shutdown() to free resources.
func Setup(conf Config) *Client {
client := newClient()
client.config = conf
client.config.Endpoint = normalizeURL(client.config.Endpoint)
go client.run()
return client
}
// Shutdown stops the client and waits for all logs to be sent.
func (client *Client) Shutdown() {
client.mutex.Lock()
client.config.Enabled = false
client.mutex.Unlock()
close(client.quit)
client.waitGroup.Wait()
}
// IsEnabled checks whether the client is enabled.
func (client *Client) IsEnabled() bool {
client.mutex.RLock()
defer client.mutex.RUnlock()
return client.config.Enabled
}
func newClient() *Client {
return &Client{
quit: make(chan struct{}),
entries: make(chan logEntry, logEntriesChanSize),
client: http.Client{},
config: Config{Enabled: false},
mutex: sync.RWMutex{},
waitGroup: sync.WaitGroup{},
}
}
func normalizeURL(host string) string {
if !regexp.MustCompile(`^https?:\/\/`).MatchString(host) {
host = "http://" + host
}
return host
}

105
metrics/desc.go Normal file
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@ -0,0 +1,105 @@
package metrics
import (
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
)
// Descriptions contains metric Description suitable for further processing.
// The only reason for it to exist is `prometheus.Desc` disallowing field access directly.
// https://github.com/prometheus/client_golang/pull/326
// https://github.com/prometheus/client_golang/issues/516
// https://github.com/prometheus/client_golang/issues/222
type Description struct {
Name string `json:"name"`
Help string `json:"help"`
Type string `json:"type"`
ConstantLabels prometheus.Labels `json:"constant_labels,omitempty"`
VariableLabels []string `json:"variable_labels,omitempty"`
}
// NewGauge returns new registered prometheus.Gauge.
func NewGauge(opts prometheus.GaugeOpts) prometheus.Gauge {
value := prometheus.NewGauge(opts)
MustRegister(value, Description{
Name: prometheus.BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
Type: dto.MetricType_GAUGE.String(),
Help: opts.Help,
ConstantLabels: opts.ConstLabels,
})
return value
}
// NewGaugeVec returns new registered *prometheus.GaugeVec.
func NewGaugeVec(opts prometheus.GaugeOpts, labelNames []string) *prometheus.GaugeVec {
value := prometheus.NewGaugeVec(opts, labelNames)
MustRegister(value, Description{
Name: prometheus.BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
Type: dto.MetricType_GAUGE.String(),
Help: opts.Help,
ConstantLabels: opts.ConstLabels,
VariableLabels: labelNames,
})
return value
}
// NewGaugeFunc returns new registered prometheus.GaugeFunc.
func NewGaugeFunc(opts prometheus.GaugeOpts, f func() float64) prometheus.GaugeFunc {
value := prometheus.NewGaugeFunc(opts, f)
MustRegister(value, Description{
Name: prometheus.BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
Type: dto.MetricType_GAUGE.String(),
Help: opts.Help,
ConstantLabels: opts.ConstLabels,
})
return value
}
// NewCounter returns new registered prometheus.Counter.
func NewCounter(opts prometheus.CounterOpts) prometheus.Counter {
value := prometheus.NewCounter(opts)
MustRegister(value, Description{
Name: prometheus.BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
Type: dto.MetricType_COUNTER.String(),
Help: opts.Help,
ConstantLabels: opts.ConstLabels,
})
return value
}
// NewCounterVec returns new registered *prometheus.CounterVec.
func NewCounterVec(opts prometheus.CounterOpts, labels []string) *prometheus.CounterVec {
value := prometheus.NewCounterVec(opts, labels)
MustRegister(value, Description{
Name: prometheus.BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
Type: dto.MetricType_COUNTER.String(),
Help: opts.Help,
ConstantLabels: opts.ConstLabels,
VariableLabels: labels,
})
return value
}
// NewHistogramVec returns new registered *prometheus.HistogramVec.
func NewHistogramVec(opts prometheus.HistogramOpts, labelNames []string) *prometheus.HistogramVec {
value := prometheus.NewHistogramVec(opts, labelNames)
MustRegister(value, Description{
Name: prometheus.BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
Type: dto.MetricType_HISTOGRAM.String(),
Help: opts.Help,
ConstantLabels: opts.ConstLabels,
VariableLabels: labelNames,
})
return value
}
// DescribeAll returns descriptions for all registered metrics.
func DescribeAll() []Description {
registeredDescriptionsMtx.Lock()
defer registeredDescriptionsMtx.Unlock()
ds := make([]Description, len(registeredDescriptions))
copy(ds, registeredDescriptions)
return ds
}

64
metrics/desc_test.go Normal file
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@ -0,0 +1,64 @@
package metrics
import (
"strings"
"testing"
"github.com/prometheus/client_golang/prometheus"
"github.com/stretchr/testify/require"
)
func TestDescribeAll(t *testing.T) {
const (
namespace = "my_ns"
subsystem = "mysub"
)
NewCounter(prometheus.CounterOpts{
Namespace: namespace,
Subsystem: subsystem,
Name: "my_counter",
})
labels := []string{"label1", "label2"}
NewGaugeVec(prometheus.GaugeOpts{
Namespace: namespace,
Subsystem: subsystem,
Name: "my_gauge",
}, labels)
constLabels := prometheus.Labels{
"const1": "abc",
"const2": "xyz",
}
NewCounter(prometheus.CounterOpts{
Namespace: namespace,
Subsystem: subsystem,
Name: "with_const_labels",
ConstLabels: constLabels,
})
descriptions := DescribeAll()
seen := make(map[string]bool)
for i := range descriptions {
if !strings.HasPrefix(descriptions[i].Name, namespace) {
continue
}
require.False(t, seen[descriptions[i].Name], "metric %s was seen twice", descriptions[i].Name)
seen[descriptions[i].Name] = true
switch descriptions[i].Name {
case prometheus.BuildFQName(namespace, subsystem, "my_counter"):
require.True(t, len(descriptions[i].VariableLabels) == 0)
case prometheus.BuildFQName(namespace, subsystem, "my_gauge"):
require.Equal(t, labels, descriptions[i].VariableLabels)
case prometheus.BuildFQName(namespace, subsystem, "with_const_labels"):
require.Equal(t, len(constLabels), len(descriptions[i].ConstantLabels))
require.Equal(t, constLabels, descriptions[i].ConstantLabels)
default:
require.FailNow(t, "unexpected metric name: %s", descriptions[i].Name)
}
}
require.Equal(t, 3, len(seen), "not all registered metrics were iterated over")
}

72
metrics/grpc/client.go Normal file
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package grpc
import (
"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
grpcprom "github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
"google.golang.org/grpc"
)
var clientMetrics = grpcprom.NewClientMetrics(
grpcprom.WithClientHandlingTimeHistogram(
grpcprom.WithHistogramBuckets(prometheus.DefBuckets),
),
grpcprom.WithClientStreamRecvHistogram(
grpcprom.WithHistogramBuckets(prometheus.DefBuckets),
),
)
func init() {
// Description copied from repository of grpc-ecosystem
// https://github.com/grpc-ecosystem/go-grpc-middleware/blob/71d7422112b1d7fadd4b8bf12a6f33ba6d22e98e/providers/prometheus/client_metrics.go#L31
descs := []metrics.Description{
{
Name: "grpc_client_started_total",
Type: dto.MetricType_COUNTER.String(),
Help: "Total number of RPCs started on the client.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
{
Name: "grpc_client_handled_total",
Type: dto.MetricType_COUNTER.String(),
Help: "Total number of RPCs completed by the client, regardless of success or failure.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"},
},
{
Name: "grpc_client_msg_received_total",
Type: dto.MetricType_COUNTER.String(),
Help: "Total number of RPC stream messages received by the client.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
{
Name: "grpc_client_msg_sent_total",
Type: dto.MetricType_COUNTER.String(),
Help: "Total number of gRPC stream messages sent by the client.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
{
Name: "grpc_client_handling_seconds",
Type: dto.MetricType_HISTOGRAM.String(),
Help: "Histogram of response latency (seconds) of the gRPC until it is finished by the application.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
{
Name: "grpc_client_msg_recv_handling_seconds",
Type: dto.MetricType_HISTOGRAM.String(),
Help: "Histogram of response latency (seconds) of the gRPC single message receive.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
}
metrics.MustRegister(clientMetrics, descs...)
}
// NewUnaryClientInterceptor returns client interceptor to collect metrics from unary RPCs.
func NewUnaryClientInterceptor() grpc.UnaryClientInterceptor {
return clientMetrics.UnaryClientInterceptor()
}
// NewStreamClientInterceptor returns client interceptor to collect metrics from stream RPCs.
func NewStreamClientInterceptor() grpc.StreamClientInterceptor {
return clientMetrics.StreamClientInterceptor()
}

63
metrics/grpc/server.go Normal file
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package grpc
import (
"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
grpcprom "github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
"google.golang.org/grpc"
)
var serverMetrics = grpcprom.NewServerMetrics(
grpcprom.WithServerHandlingTimeHistogram(
grpcprom.WithHistogramBuckets(prometheus.DefBuckets),
),
)
func init() {
// Description copied from grpc-ecosystem:
// https://github.com/grpc-ecosystem/go-grpc-middleware/blob/71d7422112b1d7fadd4b8bf12a6f33ba6d22e98e/providers/prometheus/server_metrics.go#L26
descs := []metrics.Description{
{
Name: "grpc_server_started_total",
Type: dto.MetricType_COUNTER.String(),
Help: "Total number of RPCs started on the server.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
{
Name: "grpc_server_handled_total",
Type: dto.MetricType_COUNTER.String(),
Help: "Total number of RPCs completed on the server, regardless of success or failure.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"},
},
{
Name: "grpc_server_msg_received_total",
Type: dto.MetricType_COUNTER.String(),
Help: "Total number of RPC stream messages received on the server.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
{
Name: "grpc_server_msg_sent_total",
Type: dto.MetricType_COUNTER.String(),
Help: "Total number of gRPC stream messages sent by the server.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
{
Name: "grpc_server_handling_seconds",
Type: dto.MetricType_HISTOGRAM.String(),
Help: "Histogram of response latency (seconds) of gRPC that had been application-level handled by the server.",
VariableLabels: []string{"grpc_type", "grpc_service", "grpc_method"},
},
}
metrics.MustRegister(serverMetrics, descs...)
}
// NewUnaryServerInterceptor returns server interceptor to collect metrics from unary RPCs.
func NewUnaryServerInterceptor() grpc.UnaryServerInterceptor {
return serverMetrics.UnaryServerInterceptor()
}
// NewStreamServerInterceptor returns server interceptor to collect metrics from stream RPCs.
func NewStreamServerInterceptor() grpc.StreamServerInterceptor {
return serverMetrics.StreamServerInterceptor()
}

44
metrics/registry.go Normal file
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package metrics
import (
"net/http"
"sync"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/collectors"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
var (
registry = prometheus.NewRegistry()
// registeredDescriptionsMtx protects collectors slice.
// It should not be acessed concurrently, but we can easily forget this in future, thus this mutex.
registeredDescriptionsMtx sync.Mutex
registeredDescriptions []Description
)
func init() {
registry.MustRegister(collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}))
registry.MustRegister(collectors.NewGoCollector())
}
// Register registers custom collectors to registry.
// Should be used with metrics from other packages.
func Register(customCollectors ...prometheus.Collector) {
registry.MustRegister(customCollectors...)
}
func MustRegister(c prometheus.Collector, descs ...Description) {
registry.MustRegister(c)
registeredDescriptionsMtx.Lock()
defer registeredDescriptionsMtx.Unlock()
registeredDescriptions = append(registeredDescriptions, descs...)
}
// Handler returns an http.Handler for the local registry.
func Handler() http.Handler {
promhttp.Handler()
return promhttp.InstrumentMetricHandler(
registry,
promhttp.HandlerFor(registry, promhttp.HandlerOpts{}))
}

0
testdata/tracing/invalid_empty_root_ca.pem vendored Normal file
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1
testdata/tracing/invalid_root_ca.pem vendored Normal file
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@ -0,0 +1 @@
invalid content

12
testdata/tracing/valid_google_globalsign_r4_rsa_root_ca.pem vendored Normal file
View file

@ -0,0 +1,12 @@
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

13
testdata/tracing/valid_google_gts_r4_ecdsa_root_ca.pem vendored Normal file
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@ -0,0 +1,13 @@
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

90
tracing/config.go Normal file
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package tracing
import (
"crypto/x509"
"fmt"
"maps"
)
// Exporter is type of tracing target.
type Exporter string
const (
StdoutExporter Exporter = "stdout"
OTLPgRPCExporter Exporter = "otlp_grpc"
NoOpExporter Exporter = "noop"
)
type Config struct {
// Enabled is true, if tracing enabled.
Enabled bool
// Exporter is collector type.
Exporter Exporter
// Endpoint is collector endpoint for OTLP exporters.
Endpoint string
// ServerCaCertPool is cert pool of the remote server CA certificate. Use for TLS setup.
ServerCaCertPool *x509.CertPool
// Service is service name that will be used in tracing.
// Mandatory.
Service string
// InstanceID is identity of service instance.
// Optional.
InstanceID string
// Version is version of service instance.
// Optional.
Version string
// Attributes is KV list of attributes.
// Optional.
Attributes map[string]string
}
func (c *Config) validate() error {
if !c.Enabled {
return nil
}
if c.Exporter != StdoutExporter && c.Exporter != OTLPgRPCExporter && c.Exporter != NoOpExporter {
return fmt.Errorf("tracing config error: unknown exporter '%s', valid values are %v",
c.Exporter, []string{string(StdoutExporter), string(OTLPgRPCExporter), string(NoOpExporter)})
}
if len(c.Service) == 0 {
return fmt.Errorf("tracing config error: service name must be specified")
}
if c.Exporter == OTLPgRPCExporter && len(c.Endpoint) == 0 {
return fmt.Errorf("tracing config error: exporter '%s' requires endpoint", c.Exporter)
}
return nil
}
func (c *Config) hasChange(other *Config) bool {
if !c.Enabled && !other.Enabled {
return false
}
if c.Enabled != other.Enabled {
return true
}
if (c.Exporter == StdoutExporter && other.Exporter == StdoutExporter) ||
(c.Exporter == NoOpExporter && other.Exporter == NoOpExporter) {
return !c.serviceInfoEqual(other)
}
if other.Exporter == OTLPgRPCExporter && !c.ServerCaCertPool.Equal(other.ServerCaCertPool) {
return true
}
return c.Exporter != other.Exporter ||
c.Endpoint != other.Endpoint ||
!c.serviceInfoEqual(other)
}
func (c *Config) serviceInfoEqual(other *Config) bool {
return c.Service == other.Service &&
c.InstanceID == other.InstanceID &&
c.Version == other.Version &&
maps.Equal(c.Attributes, other.Attributes)
}

278
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package tracing
import (
"crypto/x509"
"os"
"testing"
"github.com/stretchr/testify/require"
)
func TestConfig_validate(t *testing.T) {
tests := []struct {
name string
config Config
wantErr bool
}{
{
name: "disabled",
wantErr: false,
config: Config{
Enabled: false,
},
},
{
name: "stdout",
wantErr: false,
config: Config{
Enabled: true,
Exporter: StdoutExporter,
Service: "test",
InstanceID: "s01",
Version: "v0.0.1",
},
},
{
name: "noop",
wantErr: false,
config: Config{
Enabled: true,
Exporter: StdoutExporter,
Service: "test",
InstanceID: "s01",
Version: "v0.0.1",
},
},
{
name: "OTLP gRPC",
wantErr: false,
config: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Service: "test",
Endpoint: "localhost:4717",
InstanceID: "s01",
Version: "v0.0.1",
},
},
{
name: "unknown exporter",
wantErr: true,
config: Config{
Enabled: true,
Exporter: "unknown",
Service: "test",
Endpoint: "localhost:4717",
InstanceID: "s01",
Version: "v0.0.1",
},
},
{
name: "no exporter",
wantErr: true,
config: Config{
Enabled: true,
Service: "test",
Endpoint: "localhost:4717",
InstanceID: "s01",
Version: "v0.0.1",
},
},
{
name: "no service",
wantErr: true,
config: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
InstanceID: "s01",
Version: "v0.0.1",
},
},
{
name: "no endpoint for grpc",
wantErr: true,
config: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Service: "test",
InstanceID: "s01",
Version: "v0.0.1",
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if err := tt.config.validate(); (err != nil) != tt.wantErr {
t.Errorf("Config.validate() error = %v, wantErr %v", err, tt.wantErr)
}
})
}
}
func TestConfig_hasChange(t *testing.T) {
tests := []struct {
name string
config Config
other Config
want bool
}{
{
name: "disabled configs always equal",
want: false,
config: Config{
Enabled: false,
Exporter: StdoutExporter,
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
other: Config{
Enabled: false,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
},
{
name: "enabled",
want: true,
config: Config{
Enabled: false,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
other: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
},
{
name: "disabled",
want: true,
config: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
other: Config{
Enabled: false,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
},
{
name: "do not use endpoint for stdout",
want: false,
config: Config{
Enabled: true,
Exporter: StdoutExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
other: Config{
Enabled: true,
Exporter: StdoutExporter,
Endpoint: "otherhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
},
{
name: "do not use endpoint for noop",
want: false,
config: Config{
Enabled: true,
Exporter: NoOpExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
other: Config{
Enabled: true,
Exporter: NoOpExporter,
Endpoint: "otherhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
},
{
name: "use endpoint for grpc",
want: true,
config: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
other: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Endpoint: "otherhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
},
},
{
name: "use tls root ca certificate for grpc",
want: true,
config: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
ServerCaCertPool: readCertPoolByPath(t, "../testdata/tracing/valid_google_globalsign_r4_rsa_root_ca.pem"),
},
other: Config{
Enabled: true,
Exporter: OTLPgRPCExporter,
Endpoint: "localhost:4717",
Service: "test",
InstanceID: "s01",
Version: "v1.0.0",
ServerCaCertPool: readCertPoolByPath(t, "../testdata/tracing/valid_google_gts_r4_ecdsa_root_ca.pem"),
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := tt.config.hasChange(&tt.other); got != tt.want {
t.Errorf("Config.equal() = %v, want %v", got, tt.want)
}
})
}
}
func readCertPoolByPath(t *testing.T, path string) *x509.CertPool {
ca, err := os.ReadFile(path)
require.NoError(t, err)
roots := x509.NewCertPool()
ok := roots.AppendCertsFromPEM(ca)
require.True(t, ok)
return roots
}

107
tracing/examples/grpc/main.go Normal file
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package main
import (
"context"
"fmt"
"log"
"net"
"sync"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
srv "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/examples/grpc/server"
tracing_grpc "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/grpc"
"go.opentelemetry.io/otel/trace"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
)
type server struct {
srv.UnimplementedServerServer
}
func (s *server) Echo(ctx context.Context, req *srv.Request) (*srv.Response, error) {
sc := trace.SpanFromContext(ctx).SpanContext()
if !sc.TraceID().IsValid() || !sc.SpanID().IsValid() {
return nil, fmt.Errorf("no trace id or span id on server side")
}
log.Printf("server trace id: %v", sc.TraceID())
log.Printf("server span id: %v", sc.SpanID())
return &srv.Response{
Value: req.GetValue(),
}, nil
}
func verifyClientTraceID(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
sc := trace.SpanFromContext(ctx).SpanContext()
if !sc.TraceID().IsValid() || !sc.SpanID().IsValid() {
return fmt.Errorf("no trace id or span id on client side")
}
log.Printf("client trace id: %v", sc.TraceID())
log.Printf("client span id: %v", sc.SpanID())
return invoker(ctx, method, req, reply, cc, opts...)
}
func main() {
ctx := context.Background()
tracingCfg := tracing.Config{
Enabled: true,
Exporter: tracing.NoOpExporter,
Service: "example-grpc",
}
enabled, err := tracing.Setup(ctx, tracingCfg)
if err != nil {
log.Fatalf("failed to setup tracing: %v", err)
}
if !enabled {
log.Fatalf("failed to enable tracing")
}
lis, err := net.Listen("tcp", ":7000")
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
s := grpc.NewServer(
grpc.ChainStreamInterceptor(tracing_grpc.NewStreamServerInterceptor()),
grpc.ChainUnaryInterceptor(tracing_grpc.NewUnaryServerInterceptor()),
)
srv.RegisterServerServer(s, &server{})
wg := &sync.WaitGroup{}
wg.Add(1)
go func() {
defer wg.Done()
if err := s.Serve(lis); err != nil {
log.Fatalf("failed to serve: %v", err)
}
}()
time.Sleep(1 * time.Second)
cc, err := grpc.NewClient(":7000",
grpc.WithTransportCredentials(insecure.NewCredentials()),
grpc.WithChainUnaryInterceptor(
tracing_grpc.NewUnaryClientInteceptor(),
verifyClientTraceID,
),
grpc.WithChainStreamInterceptor(
tracing_grpc.NewStreamClientInterceptor(),
),
)
if err != nil {
log.Fatalf("failed to dial: %v", err)
}
client := srv.NewServerClient(cc)
resp, err := client.Echo(ctx, &srv.Request{
Value: "Hello!",
})
if err != nil {
log.Fatalf("failed to get response: %v", err)
}
log.Printf("response received: %s", resp.GetValue())
s.GracefulStop()
wg.Wait()
}

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tracing/examples/grpc/server/server.pb.go generated Normal file
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tracing/examples/grpc/server/server.proto Normal file
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syntax = "proto3";
package server;
option go_package = "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/example_grpc/server";
service Server {
rpc Echo(Request) returns (Response);
}
message Request {
string value = 1;
}
message Response {
string value = 1;
}

29
tracing/grpc/carrier.go Normal file
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package grpc
import (
"google.golang.org/grpc/metadata"
)
type grpcMetadataCarrier struct {
md *metadata.MD
}
func (c *grpcMetadataCarrier) Get(key string) string {
values := c.md.Get(key)
if len(values) > 0 {
return values[0]
}
return ""
}
func (c *grpcMetadataCarrier) Set(key string, value string) {
c.md.Set(key, value)
}
func (c *grpcMetadataCarrier) Keys() []string {
result := make([]string, 0, c.md.Len())
for key := range *c.md {
result = append(result, key)
}
return result
}

95
tracing/grpc/client.go Normal file
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package grpc
import (
"context"
"fmt"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
type clientStream struct {
originalStream grpc.ClientStream
desc *grpc.StreamDesc
span trace.Span
finished chan<- error
done <-chan struct{}
}
func newgRPCClientStream(originalStream grpc.ClientStream, desc *grpc.StreamDesc, span trace.Span, finished chan<- error, done <-chan struct{}) grpc.ClientStream {
return &clientStream{
originalStream: originalStream,
desc: desc,
span: span,
finished: finished,
done: done,
}
}
func (cs *clientStream) Header() (metadata.MD, error) {
md, err := cs.originalStream.Header()
if err != nil {
select {
case <-cs.done:
case cs.finished <- err:
}
}
return md, err
}
func (cs *clientStream) Trailer() metadata.MD {
return cs.originalStream.Trailer()
}
func (cs *clientStream) CloseSend() error {
cs.span.AddEvent("client.stream.close.send.start")
err := cs.originalStream.CloseSend()
if err != nil {
select {
case <-cs.done:
case cs.finished <- err:
}
}
cs.span.AddEvent("client.stream.close.send.finish")
return err
}
func (cs *clientStream) Context() context.Context {
return cs.originalStream.Context()
}
func (cs *clientStream) SendMsg(m any) error {
cs.span.AddEvent("client.stream.send.msg.start", trace.WithAttributes(
attribute.String("message.type", fmt.Sprintf("%T", m))),
)
err := cs.originalStream.SendMsg(m)
if err != nil {
select {
case <-cs.done:
case cs.finished <- err:
}
}
cs.span.AddEvent("client.stream.send.msg.finish", trace.WithAttributes(
attribute.String("message.type", fmt.Sprintf("%T", m))),
)
return err
}
func (cs *clientStream) RecvMsg(m any) error {
cs.span.AddEvent("client.stream.receive.msg.start", trace.WithAttributes(
attribute.String("message.type", fmt.Sprintf("%T", m))),
)
err := cs.originalStream.RecvMsg(m)
if err != nil || !cs.desc.ServerStreams {
select {
case <-cs.done:
case cs.finished <- err:
}
}
cs.span.AddEvent("client.stream.receive.msg.finish", trace.WithAttributes(
attribute.String("message.type", fmt.Sprintf("%T", m))),
)
return err
}

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tracing/grpc/interceptors.go Normal file
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package grpc
import (
"context"
"io"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
"go.opentelemetry.io/otel/trace"
"google.golang.org/grpc"
grpc_codes "google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
)
// NewUnaryClientInteceptor creates new gRPC unary interceptor to save gRPC client traces.
func NewUnaryClientInteceptor() grpc.UnaryClientInterceptor {
return func(ctx context.Context, method string, req, reply any, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
ctx, span := startClientSpan(ctx, cc, method)
defer span.End()
err := invoker(ctx, method, req, reply, cc, opts...)
if err != nil {
grpcStatus, _ := status.FromError(err)
span.SetStatus(codes.Error, grpcStatus.Message())
span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code())))
} else {
span.SetStatus(codes.Ok, "")
span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpc_codes.OK)))
}
return err
}
}
// NewStreamClientInterceptor creates new gRPC stream interceptor to save gRPC client traces.
func NewStreamClientInterceptor() grpc.StreamClientInterceptor {
return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
ctx, span := startClientSpan(ctx, cc, method)
str, err := streamer(ctx, desc, cc, method, opts...)
if err != nil {
grpcStatus, _ := status.FromError(err)
span.SetStatus(codes.Error, grpcStatus.Message())
span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code())))
span.End()
return str, err
}
finished := make(chan error)
done := make(chan struct{})
strWrp := newgRPCClientStream(str, desc, span, finished, done)
go func() {
defer close(done)
defer span.End()
select {
case err := <-finished:
if err == nil || err == io.EOF {
setGRPCSpanStatus(span, nil)
} else {
setGRPCSpanStatus(span, err)
}
return
case <-ctx.Done():
setGRPCSpanStatus(span, ctx.Err())
return
}
}()
return strWrp, nil
}
}
// NewUnaryServerInterceptor creates new gRPC unary interceptor to save gRPC server traces.
func NewUnaryServerInterceptor() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req any, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
ctx = extractGRPCTraceInfo(ctx)
var span trace.Span
ctx, span = tracing.StartSpanFromContext(ctx, info.FullMethod,
trace.WithAttributes(
semconv.RPCSystemGRPC,
semconv.RPCMethod(info.FullMethod),
),
trace.WithSpanKind(trace.SpanKindServer))
defer span.End()
resp, err = handler(ctx, req)
setGRPCSpanStatus(span, err)
return
}
}
// NewStreamServerInterceptor creates new gRPC stream interceptor to save gRPC server traces.
func NewStreamServerInterceptor() grpc.StreamServerInterceptor {
return func(srv any, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
ctx := extractGRPCTraceInfo(ss.Context())
var span trace.Span
ctx, span = tracing.StartSpanFromContext(ctx, info.FullMethod,
trace.WithAttributes(
semconv.RPCSystemGRPC,
semconv.RPCMethod(info.FullMethod),
),
trace.WithSpanKind(trace.SpanKindServer))
defer span.End()
err := handler(srv, newgRPCServerStream(ctx, ss, span))
setGRPCSpanStatus(span, err)
return err
}
}
func startClientSpan(ctx context.Context, cc *grpc.ClientConn, method string) (context.Context, trace.Span) {
ctx, span := tracing.StartSpanFromContext(ctx, method, trace.WithAttributes(
semconv.RPCSystemGRPC,
semconv.RPCMethod(method),
attribute.String("rpc.grpc.target", cc.Target())),
trace.WithSpanKind(trace.SpanKindClient),
)
ctx = setGRPCTraceInfo(ctx)
return ctx, span
}
func setGRPCSpanStatus(span trace.Span, err error) {
if err != nil {
grpcStatus, _ := status.FromError(err)
span.SetStatus(codes.Error, grpcStatus.Message())
span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code())))
} else {
span.SetStatus(codes.Ok, "")
span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpc_codes.OK)))
}
}
func extractGRPCTraceInfo(ctx context.Context) context.Context {
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return ctx
}
carrier := &grpcMetadataCarrier{
md: &md,
}
return tracing.Propagator.Extract(ctx, carrier)
}
func setGRPCTraceInfo(ctx context.Context) context.Context {
md, ok := metadata.FromOutgoingContext(ctx)
if !ok {
md = metadata.MD{}
}
carrier := &grpcMetadataCarrier{
md: &md,
}
tracing.Propagator.Inject(ctx, carrier)
return metadata.NewOutgoingContext(ctx, md)
}

63
tracing/grpc/server.go Normal file
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package grpc
import (
"context"
"fmt"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
type serverStream struct {
originalStream grpc.ServerStream
ctx context.Context // nolint:containedctx
span trace.Span
}
func newgRPCServerStream(ctx context.Context, originalStream grpc.ServerStream, span trace.Span) grpc.ServerStream {
return &serverStream{
originalStream: originalStream,
ctx: ctx,
span: span,
}
}
func (ss *serverStream) SetHeader(md metadata.MD) error {
return ss.originalStream.SendHeader(md)
}
func (ss *serverStream) SendHeader(md metadata.MD) error {
return ss.originalStream.SendHeader(md)
}
func (ss *serverStream) SetTrailer(md metadata.MD) {
ss.originalStream.SetTrailer(md)
}
func (ss *serverStream) Context() context.Context {
return ss.ctx
}
func (ss *serverStream) SendMsg(m any) error {
ss.span.AddEvent("server.stream.send.msg.start", trace.WithAttributes(
attribute.String("message.type", fmt.Sprintf("%T", m))),
)
err := ss.originalStream.SendMsg(m)
ss.span.AddEvent("server.stream.send.msg.finish", trace.WithAttributes(
attribute.String("message.type", fmt.Sprintf("%T", m))),
)
return err
}
func (ss *serverStream) RecvMsg(m any) error {
ss.span.AddEvent("server.stream.receive.msg.start", trace.WithAttributes(
attribute.String("message.type", fmt.Sprintf("%T", m))),
)
err := ss.originalStream.RecvMsg(m)
ss.span.AddEvent("server.stream.receive.msg.finish", trace.WithAttributes(
attribute.String("message.type", fmt.Sprintf("%T", m))),
)
return err
}

94
tracing/propagator.go Normal file
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package tracing
import (
"context"
"fmt"
"strconv"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/trace"
)
const (
traceIDHeader = "x-frostfs-trace-id"
spanIDHeader = "x-frostfs-span-id"
flagsHeader = "x-frostfs-trace-flags"
)
const (
flagsSampled = 1 << iota
)
// propagator serializes SpanContext to/from headers.
// x-frostfs-trace-id - TraceID, 16 bytes, hex-string (32 bytes).
// x-frostfs-span-id - SpanID, 8 bytes, hexstring (16 bytes).
// x-frostfs-trace-flags - trace flags (now sampled only).
type propagator struct{}
// Propagator is propagation.TextMapPropagator instance, used to extract/inject trace info from/to remote context.
var Propagator propagation.TextMapPropagator = &propagator{}
// Inject injects tracing info to carrier.
func (p *propagator) Inject(ctx context.Context, carrier propagation.TextMapCarrier) {
sc := trace.SpanFromContext(ctx).SpanContext()
if !sc.TraceID().IsValid() || !sc.SpanID().IsValid() {
return
}
var flags int
if sc.IsSampled() {
flags |= flagsSampled
}
carrier.Set(traceIDHeader, sc.TraceID().String())
carrier.Set(spanIDHeader, sc.SpanID().String())
carrier.Set(flagsHeader, fmt.Sprintf("%x", flags))
}
// Extract extracts tracing info from carrier and returns context with tracing info.
// In case of error returns ctx.
func (p *propagator) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context {
spanConfig := trace.SpanContextConfig{}
var err error
traceIDStr := carrier.Get(traceIDHeader)
traceIDDefined := traceIDStr != ""
if traceIDDefined {
spanConfig.TraceID, err = trace.TraceIDFromHex(traceIDStr)
if err != nil {
return ctx
}
}
spanIDstr := carrier.Get(spanIDHeader)
spanIDDefined := spanIDstr != ""
if spanIDDefined {
spanConfig.SpanID, err = trace.SpanIDFromHex(spanIDstr)
if err != nil {
return ctx
}
}
if traceIDDefined != spanIDDefined {
return ctx // traceID + spanID must be defined OR no traceID and no spanID
}
flagsStr := carrier.Get(flagsHeader)
if flagsStr != "" {
var v int64
v, err = strconv.ParseInt(flagsStr, 16, 32)
if err != nil {
return ctx
}
if v&flagsSampled == flagsSampled {
spanConfig.TraceFlags = trace.FlagsSampled
}
}
return trace.ContextWithRemoteSpanContext(ctx, trace.NewSpanContext(spanConfig))
}
// Fields returns the keys whose values are set with Inject.
func (p *propagator) Fields() []string {
return []string{traceIDHeader, spanIDHeader, flagsHeader}
}

256
tracing/propagator_test.go Normal file
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package tracing
import (
"context"
"crypto/rand"
"encoding/hex"
"testing"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/trace"
)
type testCarrier struct {
Values map[string]string
}
func (c *testCarrier) Get(key string) string {
return c.Values[key]
}
func (c *testCarrier) Set(key string, value string) {
c.Values[key] = value
}
func (c *testCarrier) Keys() []string {
res := make([]string, 0, len(c.Values))
for k := range c.Values {
res = append(res, k)
}
return res
}
var p = &propagator{}
func TestPropagator_Inject(t *testing.T) {
t.Run("injects trace_id and span_id if valid", func(t *testing.T) {
traceIDBytes := make([]byte, 16)
rand.Read(traceIDBytes)
traceIDHex := hex.EncodeToString(traceIDBytes)
spanIDBytes := make([]byte, 8)
rand.Read(spanIDBytes)
spanIDHex := hex.EncodeToString(spanIDBytes)
spanConfig := trace.SpanContextConfig{}
spanConfig.TraceID, _ = trace.TraceIDFromHex(traceIDHex)
spanConfig.SpanID, _ = trace.SpanIDFromHex(spanIDHex)
spanConfig.TraceFlags = trace.FlagsSampled
ctx := trace.ContextWithRemoteSpanContext(context.Background(), trace.NewSpanContext(spanConfig))
c := &testCarrier{
Values: make(map[string]string),
}
p.Inject(ctx, c)
require.Equal(t, 3, len(c.Values), "not all headers were saved")
require.Equal(t, traceIDHex, c.Values[traceIDHeader], "unexpected trace id")
require.Equal(t, spanIDHex, c.Values[spanIDHeader], "unexpected span id")
require.Equal(t, "1", c.Values[flagsHeader], "unexpected flags")
})
t.Run("doesn't injects if trace_id is invalid", func(t *testing.T) {
traceIDBytes := make([]byte, 16)
traceIDHex := hex.EncodeToString(traceIDBytes)
spanIDBytes := make([]byte, 8)
rand.Read(spanIDBytes)
spanIDHex := hex.EncodeToString(spanIDBytes)
spanConfig := trace.SpanContextConfig{}
spanConfig.TraceID, _ = trace.TraceIDFromHex(traceIDHex)
spanConfig.SpanID, _ = trace.SpanIDFromHex(spanIDHex)
spanConfig.TraceFlags = trace.FlagsSampled
ctx := trace.ContextWithRemoteSpanContext(context.Background(), trace.NewSpanContext(spanConfig))
c := &testCarrier{
Values: make(map[string]string),
}
p.Inject(ctx, c)
require.Equal(t, 0, len(c.Values), "some headers were saved")
})
t.Run("doesn't injects if span_id is invalid", func(t *testing.T) {
traceIDBytes := make([]byte, 16)
rand.Read(traceIDBytes)
traceIDHex := hex.EncodeToString(traceIDBytes)
spanIDBytes := make([]byte, 8)
spanIDHex := hex.EncodeToString(spanIDBytes)
spanConfig := trace.SpanContextConfig{}
spanConfig.TraceID, _ = trace.TraceIDFromHex(traceIDHex)
spanConfig.SpanID, _ = trace.SpanIDFromHex(spanIDHex)
spanConfig.TraceFlags = trace.FlagsSampled
ctx := trace.ContextWithRemoteSpanContext(context.Background(), trace.NewSpanContext(spanConfig))
c := &testCarrier{
Values: make(map[string]string),
}
p.Inject(ctx, c)
require.Equal(t, 0, len(c.Values), "some headers were saved")
})
t.Run("injects flags if no flags specified", func(t *testing.T) {
traceIDBytes := make([]byte, 16)
rand.Read(traceIDBytes)
traceIDHex := hex.EncodeToString(traceIDBytes)
spanIDBytes := make([]byte, 8)
rand.Read(spanIDBytes)
spanIDHex := hex.EncodeToString(spanIDBytes)
spanConfig := trace.SpanContextConfig{}
spanConfig.TraceID, _ = trace.TraceIDFromHex(traceIDHex)
spanConfig.SpanID, _ = trace.SpanIDFromHex(spanIDHex)
ctx := trace.ContextWithRemoteSpanContext(context.Background(), trace.NewSpanContext(spanConfig))
c := &testCarrier{
Values: make(map[string]string),
}
p.Inject(ctx, c)
require.Equal(t, 3, len(c.Values), "not all headers were saved")
require.Equal(t, traceIDHex, c.Values[traceIDHeader], "unexpected trace id")
require.Equal(t, spanIDHex, c.Values[spanIDHeader], "unexpected span id")
require.Equal(t, "0", c.Values[flagsHeader], "unexpected flags")
})
}
func TestPropagator_Extract(t *testing.T) {
t.Run("extracts if set", func(t *testing.T) {
c := &testCarrier{
Values: make(map[string]string),
}
traceIDBytes := make([]byte, 16)
rand.Read(traceIDBytes)
traceIDHex := hex.EncodeToString(traceIDBytes)
c.Values[traceIDHeader] = traceIDHex
spanIDBytes := make([]byte, 8)
rand.Read(spanIDBytes)
spanIDHex := hex.EncodeToString(spanIDBytes)
c.Values[spanIDHeader] = spanIDHex
c.Values[flagsHeader] = "1"
ctx := p.Extract(context.Background(), c)
sc := trace.SpanFromContext(ctx).SpanContext()
require.True(t, sc.HasTraceID(), "trace_id was not set")
require.Equal(t, traceIDHex, sc.TraceID().String(), "trace_id doesn't match")
require.True(t, sc.HasSpanID(), "span_id was not set")
require.Equal(t, spanIDHex, sc.SpanID().String(), "span_id doesn't match")
require.True(t, sc.IsSampled(), "sampled was not set")
})
t.Run("not extracts if only trace_id defined", func(t *testing.T) {
c := &testCarrier{
Values: make(map[string]string),
}
traceIDBytes := make([]byte, 16)
rand.Read(traceIDBytes)
traceIDHex := hex.EncodeToString(traceIDBytes)
c.Values[traceIDHeader] = traceIDHex
c.Values[flagsHeader] = "1"
ctx := p.Extract(context.Background(), c)
sc := trace.SpanFromContext(ctx).SpanContext()
require.False(t, sc.HasTraceID(), "trace_id was set")
require.False(t, sc.HasSpanID(), "span_id was set")
require.False(t, sc.IsSampled(), "sampled was set")
})
t.Run("not extracts if only span_id defined", func(t *testing.T) {
c := &testCarrier{
Values: make(map[string]string),
}
spanIDBytes := make([]byte, 8)
rand.Read(spanIDBytes)
spanIDHex := hex.EncodeToString(spanIDBytes)
c.Values[spanIDHeader] = spanIDHex
c.Values[flagsHeader] = "1"
ctx := p.Extract(context.Background(), c)
sc := trace.SpanFromContext(ctx).SpanContext()
require.False(t, sc.HasTraceID(), "trace_id was set")
require.False(t, sc.HasSpanID(), "span_id was set")
require.False(t, sc.IsSampled(), "sampled was set")
})
t.Run("not extracts if trace_id is in invalid", func(t *testing.T) {
c := &testCarrier{
Values: make(map[string]string),
}
c.Values[traceIDHeader] = "loren ipsum"
spanIDBytes := make([]byte, 8)
rand.Read(spanIDBytes)
spanIDHex := hex.EncodeToString(spanIDBytes)
c.Values[spanIDHeader] = spanIDHex
c.Values[flagsHeader] = "1"
ctx := p.Extract(context.Background(), c)
sc := trace.SpanFromContext(ctx).SpanContext()
require.False(t, sc.HasTraceID(), "trace_id was set")
require.False(t, sc.HasSpanID(), "span_id was set")
require.False(t, sc.IsSampled(), "sampled was set")
})
t.Run("not extracts if span_id is invalid", func(t *testing.T) {
c := &testCarrier{
Values: make(map[string]string),
}
c.Values[spanIDHeader] = "loren ipsum"
traceIDBytes := make([]byte, 16)
rand.Read(traceIDBytes)
traceIDHex := hex.EncodeToString(traceIDBytes)
c.Values[traceIDHeader] = traceIDHex
c.Values[flagsHeader] = "1"
ctx := p.Extract(context.Background(), c)
sc := trace.SpanFromContext(ctx).SpanContext()
require.False(t, sc.HasTraceID(), "trace_id was set")
require.False(t, sc.HasSpanID(), "span_id was set")
require.False(t, sc.IsSampled(), "sampled was set")
})
t.Run("not extracts if flags is invalid", func(t *testing.T) {
c := &testCarrier{
Values: make(map[string]string),
}
traceIDBytes := make([]byte, 16)
rand.Read(traceIDBytes)
traceIDHex := hex.EncodeToString(traceIDBytes)
c.Values[traceIDHeader] = traceIDHex
spanIDBytes := make([]byte, 8)
rand.Read(spanIDBytes)
spanIDHex := hex.EncodeToString(spanIDBytes)
c.Values[spanIDHeader] = spanIDHex
c.Values[flagsHeader] = "loren ipsum"
ctx := p.Extract(context.Background(), c)
sc := trace.SpanFromContext(ctx).SpanContext()
require.False(t, sc.HasTraceID(), "trace_id was set")
require.False(t, sc.HasSpanID(), "span_id was set")
require.False(t, sc.IsSampled(), "sampled was set")
})
}

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tracing/setup.go Normal file
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package tracing
import (
"context"
"crypto/x509"
"errors"
"fmt"
"sync"
"sync/atomic"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/sdk/trace/tracetest"
semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
"go.opentelemetry.io/otel/trace"
"go.opentelemetry.io/otel/trace/noop"
"google.golang.org/grpc/credentials"
)
// ErrEmptyServerRootCaPool indicates that cert pool is empty and does not have any certificates inside.
var ErrEmptyServerRootCaPool = errors.New("empty server root ca cert pool")
var (
// tracingLock protects provider, done, config and tracer from concurrent update.
// These fields change when the config is updated or the application is shutdown.
tracingLock = &sync.Mutex{}
provider *sdktrace.TracerProvider
done bool
config = Config{}
tracer = getDefaultTracer()
)
// Setup initializes global tracer.
// Returns true if global tracer was updated.
// Shutdown method must be called for graceful shutdown.
func Setup(ctx context.Context, cfg Config) (bool, error) {
if err := cfg.validate(); err != nil {
return false, err
}
tracingLock.Lock()
defer tracingLock.Unlock()
if done {
return false, fmt.Errorf("failed to setup tracing: already shutdown")
}
if !config.hasChange(&cfg) {
return false, nil
}
if !cfg.Enabled {
config = cfg
tracer.Store(&tracerHolder{Tracer: noop.NewTracerProvider().Tracer("")})
return true, flushAndShutdown(ctx)
}
exp, err := getExporter(ctx, &cfg)
if err != nil {
return false, err
}
prevProvider := provider
provider = sdktrace.NewTracerProvider(
sdktrace.WithBatcher(exp),
sdktrace.WithResource(newResource(&cfg)),
)
config = cfg
tracer.Store(&tracerHolder{Tracer: provider.Tracer(cfg.Service)})
var retErr error
if prevProvider != nil {
retErr = prevProvider.ForceFlush(ctx)
if err := prevProvider.Shutdown(ctx); err != nil {
if retErr == nil {
retErr = err
} else {
retErr = fmt.Errorf("%v ; %v", retErr, err)
}
}
}
return true, retErr
}
// Shutdown shutdowns tracing.
func Shutdown(ctx context.Context) error {
tracingLock.Lock()
defer tracingLock.Unlock()
if done {
return nil
}
done = true
config = Config{}
tracer.Store(&tracerHolder{Tracer: noop.NewTracerProvider().Tracer("")})
return flushAndShutdown(ctx)
}
func getDefaultTracer() *atomic.Pointer[tracerHolder] {
v := new(atomic.Pointer[tracerHolder])
v.Store(&tracerHolder{Tracer: noop.NewTracerProvider().Tracer("")})
return v
}
func flushAndShutdown(ctx context.Context) error {
if provider == nil {
return nil
}
tmp := provider
provider = nil
var retErr error
retErr = tmp.ForceFlush(ctx)
if err := tmp.Shutdown(ctx); err != nil {
if retErr == nil {
retErr = err
} else {
retErr = fmt.Errorf("%v ; %v", retErr, err)
}
}
return retErr
}
func getExporter(ctx context.Context, cfg *Config) (sdktrace.SpanExporter, error) {
switch cfg.Exporter {
default:
return nil, fmt.Errorf("failed to setup tracing: unknown tracing exporter (%s)", cfg.Exporter)
case StdoutExporter:
return stdouttrace.New()
case NoOpExporter:
return tracetest.NewNoopExporter(), nil
case OTLPgRPCExporter:
securityOption := otlptracegrpc.WithInsecure()
if cfg.ServerCaCertPool != nil {
if cfg.ServerCaCertPool.Equal(x509.NewCertPool()) {
return nil, fmt.Errorf("failed to setup tracing: %w", ErrEmptyServerRootCaPool)
}
securityOption = otlptracegrpc.WithTLSCredentials(credentials.NewClientTLSFromCert(cfg.ServerCaCertPool, ""))
}
return otlptracegrpc.New(ctx, otlptracegrpc.WithEndpoint(cfg.Endpoint), securityOption)
}
}
func newResource(cfg *Config) *resource.Resource {
attrs := []attribute.KeyValue{
semconv.ServiceName(cfg.Service),
}
if len(cfg.Version) > 0 {
attrs = append(attrs, semconv.ServiceVersion(cfg.Version))
}
if len(cfg.InstanceID) > 0 {
attrs = append(attrs, semconv.ServiceInstanceID(cfg.InstanceID))
}
for k, v := range cfg.Attributes {
attrs = append(attrs, attribute.String(k, v))
}
return resource.NewWithAttributes(
semconv.SchemaURL,
attrs...,
)
}
type tracerHolder struct {
Tracer trace.Tracer
}

118
tracing/setup_test.go Normal file
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package tracing_test
import (
"context"
"crypto/x509"
"os"
"testing"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
"github.com/stretchr/testify/require"
)
func TestSetup(t *testing.T) {
tests := []struct {
name string
config tracing.Config
want bool
expErr error
}{
{
name: "setup stdout exporter",
config: tracing.Config{
Enabled: true,
Exporter: tracing.StdoutExporter,
Service: "service-name",
},
want: true,
expErr: nil,
},
{
name: "setup noop exporter",
config: tracing.Config{
Enabled: true,
Exporter: tracing.NoOpExporter,
Service: "service-name",
},
want: true,
expErr: nil,
},
{
name: "setup otlp_grpc insecure exporter",
config: tracing.Config{
Enabled: true,
Exporter: tracing.OTLPgRPCExporter,
Service: "service-name",
Endpoint: "test-endpoint.com:4317",
},
want: true,
expErr: nil,
},
{
name: "setup otlp_grpc secure exporter with valid rsa root ca certificate",
config: tracing.Config{
Enabled: true,
Exporter: tracing.OTLPgRPCExporter,
Service: "service-name",
Endpoint: "test-endpoint.com:4317",
ServerCaCertPool: readCertPoolByPath(t, "../testdata/tracing/valid_google_globalsign_r4_rsa_root_ca.pem"),
},
want: true,
expErr: nil,
},
{
name: "setup otlp_grpc secure exporter with valid ecdsa root ca certificate",
config: tracing.Config{
Enabled: true,
Exporter: tracing.OTLPgRPCExporter,
Service: "service-name",
Endpoint: "test-endpoint.com:4317",
ServerCaCertPool: readCertPoolByPath(t, "../testdata/tracing/valid_google_gts_r4_ecdsa_root_ca.pem"),
},
want: true,
expErr: nil,
},
{
name: "setup otlp_grpc secure exporter with invalid root ca certificate",
config: tracing.Config{
Enabled: true,
Exporter: tracing.OTLPgRPCExporter,
Service: "service-name",
Endpoint: "test-endpoint.com:4317",
ServerCaCertPool: readCertPoolByPath(t, "../testdata/tracing/invalid_root_ca.pem"),
},
want: false,
expErr: tracing.ErrEmptyServerRootCaPool,
},
{
name: "setup otlp_grpc secure exporter with empty root ca certificate",
config: tracing.Config{
Enabled: true,
Exporter: tracing.OTLPgRPCExporter,
Service: "service-name",
Endpoint: "test-endpoint.com:4317",
ServerCaCertPool: readCertPoolByPath(t, "../testdata/tracing/invalid_empty_root_ca.pem"),
},
want: false,
expErr: tracing.ErrEmptyServerRootCaPool,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := tracing.Setup(context.Background(), tt.config)
require.ErrorIs(t, err, tt.expErr)
if got != tt.want {
t.Errorf("Setup config = %v, want %v", got, tt.want)
}
})
}
}
func readCertPoolByPath(t *testing.T, path string) *x509.CertPool {
ca, err := os.ReadFile(path)
require.NoError(t, err)
roots := x509.NewCertPool()
_ = roots.AppendCertsFromPEM(ca)
return roots
}

12
tracing/span.go Normal file
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package tracing
import (
"context"
"go.opentelemetry.io/otel/trace"
)
// StartSpanFromContext creates a span and a context.Context containing the newly-created span.
func StartSpanFromContext(ctx context.Context, operationName string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
return tracer.Load().Tracer.Start(ctx, operationName, opts...)
}