[#17 ] config: Add resource attributes

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
[#11 ] Add license and README
2024-11-12 11:23:07 +03:00 · 2024-11-08 15:06:58 +03:00 · 2024-09-09 14:43:14 +03:00 · 2024-07-05 10:37:41 +03:00 · 2024-07-05 10:37:40 +03:00 · 2024-07-05 10:35:11 +03:00
39 changed files with 3140 additions and 22 deletions
--- a/.forgejo/workflows/dco.yml
+++ b/.forgejo/workflows/dco.yml
@ -0,0 +1,21 @@
 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/${{ github.event.pull_request.base.ref }}'
--- a/.forgejo/workflows/tests.yml
+++ b/.forgejo/workflows/tests.yml
@ -0,0 +1,73 @@
 name: Tests and linters
 on: [pull_request]
 jobs:
  lint:
    name: Lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Set up Go
        uses: actions/setup-go@v3
        with:
          go-version: '1.22'
          cache: true
      - name: Install linters
        run: make lint-install
      - name: Run linters
        run: make lint
  tests:
    name: Tests
    runs-on: ubuntu-latest
    strategy:
      matrix:
        go_versions: [ '1.21', '1.22' ]
      fail-fast: false
    steps:
      - uses: actions/checkout@v3
      - name: Set up Go
        uses: actions/setup-go@v3
        with:
          go-version: '${{ 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
--- a/.gitlint
+++ b/.gitlint
@ -1,11 +0,0 @@
 [general]
 fail-without-commits=True
 regex-style-search=True
 contrib=CC1
 [title-match-regex]
 regex=^\[\#[0-9Xx]+\]\s
 [ignore-by-title]
 regex=^Release(.*)
 ignore=title-match-regex
--- a/.golangci.yml
+++ b/.golangci.yml
@ -25,7 +25,7 @@ linters-settings:
    # report about shadowed variables
    check-shadowing: false
  staticcheck:
-    checks: ["all", "-SA1019"] # TODO Enable SA1019 after deprecated warning are fixed.
+    checks: ["all"]
  funlen:
    lines: 80 # default 60
    statements: 60 # default 40
@ -52,7 +52,7 @@ linters:
    - durationcheck
    - exhaustive
    - exportloopref
-    - gofmt
+    - gofumpt
    - goimports
    - misspell
    - predeclared
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@ -2,13 +2,6 @@ ci:
  autofix_prs: false
 repos:
  - repo: https://github.com/jorisroovers/gitlint
    rev:  v0.19.1
    hooks:
      - id: gitlint
        stages: [commit-msg]
      - id: gitlint-ci
  - repo: https://github.com/pre-commit/pre-commit-hooks
    rev: v4.4.0
    hooks:
@ -31,7 +24,7 @@ repos:
      - id: shellcheck
  - repo: https://github.com/golangci/golangci-lint
-    rev: v1.51.2
+    rev: v1.59.1
    hooks:
      - id: golangci-lint
@ -39,7 +32,7 @@ repos:
    hooks:
       - id: go-unit-tests
         name: go unit tests
-         entry: make test
+         entry: make test GOFLAGS=''
         pass_filenames: false
         types: [go]
         language: system
--- a/201
+++ b/201
@ -0,0 +1,201 @@
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--- a/64
+++ b/64
@ -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 ./...
--- a/README.md
+++ b/README.md
@ -0,0 +1,22 @@
 # Helper Go libraries for working with metrics, traces and logging
 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.
 ```
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,47 @@
 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
 )
--- a/go.sum
+++ b/go.sum
@ -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=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
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 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=
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 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=
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 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=
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 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=
--- a/logging/lokicore/core.go
+++ b/logging/lokicore/core.go
@ -0,0 +1,67 @@
 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)
 }
--- a/logging/lokicore/loki/README.md
+++ b/logging/lokicore/loki/README.md
@ -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())
 }
 ```
--- a/logging/lokicore/loki/example/main.go
+++ b/logging/lokicore/loki/example/main.go
@ -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()
 }
--- a/logging/lokicore/loki/log.go
+++ b/logging/lokicore/loki/log.go
@ -0,0 +1,108 @@
 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
 }
--- a/logging/lokicore/loki/send.go
+++ b/logging/lokicore/loki/send.go
@ -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, ","))
 }
--- a/logging/lokicore/loki/setup.go
+++ b/logging/lokicore/loki/setup.go
@ -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
 }
--- a/metrics/desc.go
+++ b/metrics/desc.go
@ -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
 }
--- a/metrics/desc_test.go
+++ b/metrics/desc_test.go
@ -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")
 }
--- a/metrics/grpc/client.go
+++ b/metrics/grpc/client.go
@ -0,0 +1,72 @@
 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()
 }
--- a/metrics/grpc/server.go
+++ b/metrics/grpc/server.go
@ -0,0 +1,63 @@
 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()
 }
--- a/metrics/registry.go
+++ b/metrics/registry.go
@ -0,0 +1,44 @@
 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{}))
 }
--- a/testdata/tracing/invalid_empty_root_ca.pem
+++ b/testdata/tracing/invalid_empty_root_ca.pem
--- a/testdata/tracing/invalid_root_ca.pem
+++ b/testdata/tracing/invalid_root_ca.pem
@ -0,0 +1 @@
 invalid content
--- a/testdata/tracing/valid_google_globalsign_r4_rsa_root_ca.pem
+++ b/testdata/tracing/valid_google_globalsign_r4_rsa_root_ca.pem
@ -0,0 +1,12 @@
 -----BEGIN CERTIFICATE-----
 MIIB3DCCAYOgAwIBAgINAgPlfvU/k/2lCSGypjAKBggqhkjOPQQDAjBQMSQwIgYD
 VQQLExtHbG9iYWxTaWduIEVDQyBSb290IENBIC0gUjQxEzARBgNVBAoTCkdsb2Jh
 bFNpZ24xEzARBgNVBAMTCkdsb2JhbFNpZ24wHhcNMTIxMTEzMDAwMDAwWhcNMzgw
 MTE5MDMxNDA3WjBQMSQwIgYDVQQLExtHbG9iYWxTaWduIEVDQyBSb290IENBIC0g
 UjQxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMTCkdsb2JhbFNpZ24wWTAT
 BgcqhkjOPQIBBggqhkjOPQMBBwNCAAS4xnnTj2wlDp8uORkcA6SumuU5BwkWymOx
 uYb4ilfBV85C+nOh92VC/x7BALJucw7/xyHlGKSq2XE/qNS5zowdo0IwQDAOBgNV
 HQ8BAf8EBAMCAYYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUVLB7rUW44kB/
 +wpu+74zyTyjhNUwCgYIKoZIzj0EAwIDRwAwRAIgIk90crlgr/HmnKAWBVBfw147
 bmF0774BxL4YSFlhgjICICadVGNA3jdgUM/I2O2dgq43mLyjj0xMqTQrbO/7lZsm
 -----END CERTIFICATE-----
--- a/testdata/tracing/valid_google_gts_r4_ecdsa_root_ca.pem
+++ b/testdata/tracing/valid_google_gts_r4_ecdsa_root_ca.pem
@ -0,0 +1,13 @@
 -----BEGIN CERTIFICATE-----
 MIICCTCCAY6gAwIBAgINAgPlwGjvYxqccpBQUjAKBggqhkjOPQQDAzBHMQswCQYD
 VQQGEwJVUzEiMCAGA1UEChMZR29vZ2xlIFRydXN0IFNlcnZpY2VzIExMQzEUMBIG
 A1UEAxMLR1RTIFJvb3QgUjQwHhcNMTYwNjIyMDAwMDAwWhcNMzYwNjIyMDAwMDAw
 WjBHMQswCQYDVQQGEwJVUzEiMCAGA1UEChMZR29vZ2xlIFRydXN0IFNlcnZpY2Vz
 IExMQzEUMBIGA1UEAxMLR1RTIFJvb3QgUjQwdjAQBgcqhkjOPQIBBgUrgQQAIgNi
 AATzdHOnaItgrkO4NcWBMHtLSZ37wWHO5t5GvWvVYRg1rkDdc/eJkTBa6zzuhXyi
 QHY7qca4R9gq55KRanPpsXI5nymfopjTX15YhmUPoYRlBtHci8nHc8iMai/lxKvR
 HYqjQjBAMA4GA1UdDwEB/wQEAwIBhjAPBgNVHRMBAf8EBTADAQH/MB0GA1UdDgQW
 BBSATNbrdP9JNqPV2Py1PsVq8JQdjDAKBggqhkjOPQQDAwNpADBmAjEA6ED/g94D
 9J+uHXqnLrmvT/aDHQ4thQEd0dlq7A/Cr8deVl5c1RxYIigL9zC2L7F8AjEA8GE8
 p/SgguMh1YQdc4acLa/KNJvxn7kjNuK8YAOdgLOaVsjh4rsUecrNIdSUtUlD
 -----END CERTIFICATE-----
--- a/tracing/config.go
+++ b/tracing/config.go
@ -0,0 +1,90 @@
 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)
 }
--- a/tracing/config_test.go
+++ b/tracing/config_test.go
@ -0,0 +1,278 @@
 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
 }
--- a/tracing/examples/grpc/main.go
+++ b/tracing/examples/grpc/main.go
@ -0,0 +1,107 @@
 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()
 }
--- a/tracing/examples/grpc/server/server.pb.go
+++ b/tracing/examples/grpc/server/server.pb.go
--- a/tracing/examples/grpc/server/server.proto
+++ b/tracing/examples/grpc/server/server.proto
@ -0,0 +1,17 @@
 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;
 }
--- a/tracing/grpc/carrier.go
+++ b/tracing/grpc/carrier.go
@ -0,0 +1,29 @@
 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
 }
--- a/tracing/grpc/client.go
+++ b/tracing/grpc/client.go
@ -0,0 +1,76 @@
 package grpc
 import (
 	"context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
 )
 type clientStream struct {
 	originalStream grpc.ClientStream
 	desc           *grpc.StreamDesc
 	finished       chan<- error
 	done           <-chan struct{}
 }
 func newgRPCClientStream(originalStream grpc.ClientStream, desc *grpc.StreamDesc, finished chan<- error, done <-chan struct{}) grpc.ClientStream {
 	return &clientStream{
 		originalStream: originalStream,
 		desc:           desc,
 		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 {
 	err := cs.originalStream.CloseSend()
 	if err != nil {
 		select {
 		case <-cs.done:
 		case cs.finished <- err:
 		}
 	}
 	return err
 }
 func (cs *clientStream) Context() context.Context {
 	return cs.originalStream.Context()
 }
 func (cs *clientStream) SendMsg(m any) error {
 	err := cs.originalStream.SendMsg(m)
 	if err != nil {
 		select {
 		case <-cs.done:
 		case cs.finished <- err:
 		}
 	}
 	return err
 }
 func (cs *clientStream) RecvMsg(m any) error {
 	err := cs.originalStream.RecvMsg(m)
 	if err != nil || !cs.desc.ServerStreams {
 		select {
 		case <-cs.done:
 		case cs.finished <- err:
 		}
 	}
 	return err
 }
--- a/tracing/grpc/interceptors.go
+++ b/tracing/grpc/interceptors.go
@ -0,0 +1,160 @@
 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, 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))
 		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)
 }
--- a/tracing/grpc/server.go
+++ b/tracing/grpc/server.go
@ -0,0 +1,44 @@
 package grpc
 import (
 	"context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
 )
 type serverStream struct {
 	originalStream grpc.ServerStream
 	ctx            context.Context // nolint:containedctx
 }
 func newgRPCServerStream(ctx context.Context, originalStream grpc.ServerStream) grpc.ServerStream {
 	return &serverStream{
 		originalStream: originalStream,
 		ctx:            ctx,
 	}
 }
 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 {
 	return ss.originalStream.SendMsg(m)
 }
 func (ss *serverStream) RecvMsg(m any) error {
 	return ss.originalStream.RecvMsg(m)
 }
--- a/tracing/propagator.go
+++ b/tracing/propagator.go
@ -0,0 +1,94 @@
 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}
 }
--- a/tracing/propagator_test.go
+++ b/tracing/propagator_test.go
@ -0,0 +1,256 @@
 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")
 	})
 }
--- a/tracing/setup.go
+++ b/tracing/setup.go
@ -0,0 +1,176 @@
 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
 }
--- a/tracing/setup_test.go
+++ b/tracing/setup_test.go
@ -0,0 +1,118 @@
 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
 }
--- a/tracing/span.go
+++ b/tracing/span.go
@ -0,0 +1,12 @@
 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...)
 }
Author	SHA1	Message	Date
Dmitrii Stepanov	f17779933e	[#17 ] config: Add resource attributes Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>	2024-11-12 11:23:07 +03:00
Vitaliy Potyarkin	486af9e0d8	[#11 ] Add license and README (close #11) Signed-off-by: Vitaliy Potyarkin <v.potyarkin@yadro.com>	2024-11-08 15:06:58 +03:00
Aleksey Savaitan	666d326cc5	[#13 ] support tls over grpc for otlp_grpc exporter type Signed-off-by: Aleksey Savaitan <a.savaitan@yadro.com>	2024-09-09 14:43:14 +03:00
Evgenii Stratonikov	6dd265d949	[#12 ] tracing: Optimize noop exporter Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:37:41 +03:00
Evgenii Stratonikov	cb37f5975e	[#12 ] go.mod: Update otel dependencies Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:37:40 +03:00
Evgenii Stratonikov	4516209806	[#12 ] go.mod: Bump go version to 1.21 Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:35:11 +03:00
Evgenii Stratonikov	07d955b1d0	[#12 ] pre-commit: Use cached tests in hook Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:27:32 +03:00
Evgenii Stratonikov	3b672cf19e	[#12 ] Makefile: Allow to override testflags Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:27:32 +03:00
Evgenii Stratonikov	7a48a24c2a	[#12 ] pre-commit: Remove gitlint Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:27:32 +03:00
Evgenii Stratonikov	c094f8ec89	[#12 ] .golangci.yml: Reenable deprecated warnings Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:27:32 +03:00
Evgenii Stratonikov	f73432edd6	[#12 ] Makefile: Update golanci-lint to v1.59.1 Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:27:32 +03:00
Evgenii Stratonikov	44b526aaf8	[#12 ] go.mod: Tidy modules Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-07-05 10:27:32 +03:00
Evgenii Stratonikov	26ef0b79cf	[#7 ] Makefile: Update linter versions Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-01-31 15:06:10 +03:00
Evgenii Stratonikov	afb5f2b857	[#7 ] .forgejo: Add pre-commit Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-01-31 15:05:29 +03:00
Evgenii Stratonikov	99465e6639	[#7 ] loki: Fix linter issues Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>	2024-01-31 14:54:34 +03:00
Alexander Chuprov	b3ad3335ff	[#5 ] logs: Add Loki Signed-off-by: Alexander Chuprov <a.chuprov@yadro.com>	2023-11-01 14:17:34 +03:00
Anton Nikiforov	7960099809	[#4 ] Export gRPC client and server metrics Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>	2023-10-19 10:51:18 +03:00
Dmitrii Stepanov	c97d21411e	[#3 ] metrics: Add gRPC middleware Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>	2023-05-31 11:27:42 +03:00
Dmitrii Stepanov	3c1b76ee51	[#3 ] metrics: Move from node Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>	2023-05-31 11:27:42 +03:00
Dmitrii Stepanov	7f9eba1b19	[#3 ] tracing: Move from api-go Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>	2023-05-31 11:27:42 +03:00