[#17] config: Add resource attributes

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

.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 }}'

.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

.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

.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

.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

LICENSE

@@ -0,0 +1,201 @@
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+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+      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.
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+   END OF TERMS AND CONDITIONS
+
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+
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+   limitations under the License.

Makefile

@@ -1,14 +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$(TRUECLOUDLAB_LINT_VERSION)
+
+# Run all code formatters
+fmts: fmt imports
+
+# Reformat code
+fmt:
+	@echo "⇒ Processing gofmt check"
+	@gofumpt -s -w .
+
+# Reformat imports
+imports:
+	@echo "⇒ Processing goimports check"
+	@goimports -w .
+
 # Run Unit Test with go test
+test: GOFLAGS ?= "-count=1"
 test:
-	@go test ./... -count=1
+	@echo "⇒ Running go test"
+	@GOFLAGS="$(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:
-	@golangci-lint --timeout=5m run
+	@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:
+staticcheck-run:
 	@staticcheck ./...

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.
+```

go.mod

@@ -1,43 +1,47 @@
 module git.frostfs.info/TrueCloudLab/frostfs-observability
 
-go 1.19
+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 v1.8.3
+	github.com/stretchr/testify v1.9.0
-	go.opentelemetry.io/otel v1.16.0
+	go.opentelemetry.io/otel v1.28.0
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.16.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.28.0
-	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.16.0
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.28.0
-	go.opentelemetry.io/otel/sdk v1.16.0
+	go.opentelemetry.io/otel/sdk v1.28.0
-	go.opentelemetry.io/otel/trace v1.16.0
+	go.opentelemetry.io/otel/trace v1.28.0
-	google.golang.org/grpc v1.55.0
+	google.golang.org/grpc v1.64.0
-	google.golang.org/protobuf v1.30.0
+	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 v4.2.1 // 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 v1.2.4 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/golang/protobuf v1.5.3 // 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 v2.7.0 // 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
-	github.com/rogpeppe/go-internal v1.10.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.16.0 // indirect
+	go.opentelemetry.io/otel/metric v1.28.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.16.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
-	go.opentelemetry.io/otel/metric v1.16.0 // indirect
+	go.uber.org/zap v1.26.0
-	go.opentelemetry.io/proto/otlp v0.19.0 // indirect
+	golang.org/x/net v0.26.0 // indirect
-	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
-	golang.org/x/sys v0.8.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
-	golang.org/x/text v0.8.0 // indirect
 	google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -33,15 +33,11 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
 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=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
+github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
-github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
+github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
-github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
@@ -50,34 +46,23 @@ github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMn
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
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@@ -101,11 +86,10 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
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-github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
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@@ -116,8 +100,8 @@ github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
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@@ -129,15 +113,16 @@ github.com/google/pprof v0.0.0-20200430221834-fc25d7d30c6d/go.mod h1:ZgVRPoUq/hf
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@@ -146,9 +131,11 @@ github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/X
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@@ -164,17 +151,15 @@ github.com/prometheus/common v0.42.0 h1:EKsfXEYo4JpWMHH5cg+KOUWeuJSov1Id8zGR8eeI
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@@ -183,26 +168,28 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
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-go.opentelemetry.io/otel v1.16.0 h1:Z7GVAX/UkAXPKsy94IU+i6thsQS4nb7LviLpnaNeW8s=
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-go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
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-go.uber.org/goleak v1.2.1 h1:NBol2c7O1ZokfZ0LEU9K6Whx/KnwvepVetCUhtKja4A=
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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=
@@ -264,17 +251,15 @@ golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/
 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 v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210423184538-5f58ad60dda6/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
-golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
+golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
-golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
+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=
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 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=
-golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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@@ -309,21 +294,18 @@ golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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-golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
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-golang.org/x/text v0.8.0 h1:57P1ETyNKtuIjB4SRd15iJxuhj8Gc416Y78H3qgMh68=
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+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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@@ -416,7 +398,6 @@ google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfG
 google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
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@@ -424,7 +405,6 @@ google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6D
 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 v0.0.0-20211118181313-81c1377c94b1/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 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=
@@ -439,13 +419,9 @@ google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKa
 google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
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 google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/grpc v1.37.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
-google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
+google.golang.org/grpc v1.64.0 h1:KH3VH9y/MgNQg1dE7b3XfVK0GsPSIzJwdF617gUSbvY=
-google.golang.org/grpc v1.42.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
+google.golang.org/grpc v1.64.0/go.mod h1:oxjF8E3FBnjp+/gVFYdWacaLDx9na1aqy9oovLpxQYg=
-google.golang.org/grpc v1.55.0 h1:3Oj82/tFSCeUrRTg/5E/7d/W5A1tj6Ky1ABAuZuv5ag=
-google.golang.org/grpc v1.55.0/go.mod h1:iYEXKGkEBhg1PjZQvoYEVPTDkHo1/bjTnfwTeGONTY8=
 google.golang.org/grpc/examples v0.0.0-20210424002626-9572fd6faeae/go.mod h1:Ly7ZA/ARzg8fnPU9TyZIxoz33sEUuWX7txiqs8lPTgE=
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 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
@@ -459,15 +435,14 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
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-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
-google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
+google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
-google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
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 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.v2 v2.2.3/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=

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)
+}

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())
+}
+
+```

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()
+}

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
+}

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, ","))
+}

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
+}

testdata/tracing/invalid_root_ca.pem

@@ -0,0 +1 @@
+invalid content

testdata/tracing/valid_google_globalsign_r4_rsa_root_ca.pem

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

testdata/tracing/valid_google_gts_r4_ecdsa_root_ca.pem

@@ -0,0 +1,13 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

tracing/config.go

@@ -1,6 +1,10 @@
 package tracing
 
-import "fmt"
+import (
+	"crypto/x509"
+	"fmt"
+	"maps"
+)
 
 // Exporter is type of tracing target.
 type Exporter string
@@ -18,6 +22,8 @@ type Config struct {
 	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.
@@ -28,6 +34,9 @@ type Config struct {
 	// 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 {
@@ -64,6 +73,10 @@ func (c *Config) hasChange(other *Config) bool {
 		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)
@@ -72,5 +85,6 @@ func (c *Config) hasChange(other *Config) bool {
 func (c *Config) serviceInfoEqual(other *Config) bool {
 	return c.Service == other.Service &&
 		c.InstanceID == other.InstanceID &&
-		c.Version == other.Version
+		c.Version == other.Version &&
+		maps.Equal(c.Attributes, other.Attributes)
 }

tracing/config_test.go

@@ -1,7 +1,11 @@
 package tracing
 
 import (
+	"crypto/x509"
+	"os"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func TestConfig_validate(t *testing.T) {
@@ -232,6 +236,28 @@ func TestConfig_hasChange(t *testing.T) {
 				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) {
@@ -241,3 +267,12 @@ func TestConfig_hasChange(t *testing.T) {
 		})
 	}
 }
+
+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
+}

tracing/examples/grpc/main.go

@@ -79,8 +79,7 @@ func main() {
 
 	time.Sleep(1 * time.Second)
 
-	cc, err := grpc.DialContext(ctx,
+	cc, err := grpc.NewClient(":7000",
-		":7000",
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithChainUnaryInterceptor(
 			tracing_grpc.NewUnaryClientInteceptor(),
@@ -97,7 +96,6 @@ func main() {
 	resp, err := client.Echo(ctx, &srv.Request{
 		Value: "Hello!",
 	})
-
 	if err != nil {
 		log.Fatalf("failed to get response: %v", err)
 	}

tracing/propagator.go

@@ -70,7 +70,7 @@ func (p *propagator) Extract(ctx context.Context, carrier propagation.TextMapCar
 	}
 
 	if traceIDDefined != spanIDDefined {
-		return ctx //traceID + spanID must be defined OR no traceID and no spanID
+		return ctx // traceID + spanID must be defined OR no traceID and no spanID
 	}
 
 	flagsStr := carrier.Get(flagsHeader)

tracing/propagator_test.go

@@ -2,8 +2,8 @@ package tracing
 
 import (
 	"context"
+	"crypto/rand"
 	"encoding/hex"
-	"math/rand"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -124,7 +124,6 @@ func TestPropagator_Inject(t *testing.T) {
 		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) {

tracing/setup.go

@@ -2,8 +2,9 @@ package tracing
 
 import (
 	"context"
+	"crypto/x509"
+	"errors"
 	"fmt"
-	"io"
 	"sync"
 	"sync/atomic"
 
@@ -12,10 +13,16 @@ import (
 	"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.
@@ -49,7 +56,7 @@ func Setup(ctx context.Context, cfg Config) (bool, error) {
 
 	if !cfg.Enabled {
 		config = cfg
-		tracer.Store(&tracerHolder{Tracer: trace.NewNoopTracerProvider().Tracer("")})
+		tracer.Store(&tracerHolder{Tracer: noop.NewTracerProvider().Tracer("")})
 		return true, flushAndShutdown(ctx)
 	}
 
@@ -95,14 +102,14 @@ func Shutdown(ctx context.Context) error {
 	done = true
 
 	config = Config{}
-	tracer.Store(&tracerHolder{Tracer: trace.NewNoopTracerProvider().Tracer("")})
+	tracer.Store(&tracerHolder{Tracer: noop.NewTracerProvider().Tracer("")})
 
 	return flushAndShutdown(ctx)
 }
 
 func getDefaultTracer() *atomic.Pointer[tracerHolder] {
 	v := new(atomic.Pointer[tracerHolder])
-	v.Store(&tracerHolder{Tracer: trace.NewNoopTracerProvider().Tracer("")})
+	v.Store(&tracerHolder{Tracer: noop.NewTracerProvider().Tracer("")})
 	return v
 }
 
@@ -132,9 +139,16 @@ func getExporter(ctx context.Context, cfg *Config) (sdktrace.SpanExporter, error
 	case StdoutExporter:
 		return stdouttrace.New()
 	case NoOpExporter:
-		return stdouttrace.New(stdouttrace.WithWriter(io.Discard))
+		return tracetest.NewNoopExporter(), nil
 	case OTLPgRPCExporter:
-		return otlptracegrpc.New(ctx, otlptracegrpc.WithEndpoint(cfg.Endpoint), otlptracegrpc.WithInsecure())
+		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)
 	}
 }
 
@@ -148,6 +162,9 @@ func newResource(cfg *Config) *resource.Resource {
 	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...,

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
+}