Merge pull request #477 from prometheus/repo_sync

Synchronize common files from prometheus/prometheus

.circleci/config.yml

@@ -1,11 +1,11 @@
 version: 2.1
 orbs:
-  prometheus: prometheus/prometheus@0.11.0
+  prometheus: prometheus/prometheus@0.16.0
 executors:
   # Whenever the Go version is updated here, .promu.yml should also be updated.
   golang:
     docker:
-      - image: circleci/golang:1.17
+      - image: cimg/go:1.19
 jobs:
   test:
     executor: golang

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "monthly"

.github/workflows/golangci-lint.yml

@@ -9,13 +9,6 @@ on:
       - ".github/workflows/golangci-lint.yml"
       - ".golangci.yml"
   pull_request:
-    paths:
-      - "go.sum"
-      - "go.mod"
-      - "**.go"
-      - "scripts/errcheck_excludes.txt"
-      - ".github/workflows/golangci-lint.yml"
-      - ".golangci.yml"
 
 jobs:
   golangci:
@@ -23,9 +16,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
-
-      - name: Lint
-        uses: golangci/golangci-lint-action@v2
+        uses: actions/checkout@v3
+      - name: install Go
+        uses: actions/setup-go@v2
         with:
-          version: v1.42.0
+          go-version: 1.18.x
+      - name: Install snmp_exporter/generator dependencies
+        run: sudo apt-get update && sudo apt-get -y install libsnmp-dev
+        if: github.repository == 'prometheus/snmp_exporter'
+      - name: Lint
+        uses: golangci/golangci-lint-action@v3.2.0
+        with:
+          version: v1.45.2

.gitpod.yml

@@ -10,4 +10,4 @@ ports:
     onOpen: ignore
 
 image:
-  file: .gitpod.Dockerfile
+  file: .gitpod.Dockerfile

.promu.yml

@@ -1,7 +1,7 @@
 go:
     # Whenever the Go version is updated here, .circle/config.yml should also
     # be updated.
-    version: 1.17
+    version: 1.19
 repository:
     path: github.com/prometheus/statsd_exporter
 build:

.yamllint

@@ -0,0 +1,28 @@
+---
+extends: default
+
+rules:
+  braces:
+    max-spaces-inside: 1
+    level: error
+  brackets:
+    max-spaces-inside: 1
+    level: error
+  commas: disable
+  comments: disable
+  comments-indentation: disable
+  document-start: disable
+  indentation:
+    spaces: consistent
+    indent-sequences: consistent
+  key-duplicates:
+    ignore: |
+      config/testdata/section_key_dup.bad.yml
+  line-length: disable
+  truthy:
+    ignore: |
+      .github/workflows/codeql-analysis.yml
+      .github/workflows/funcbench.yml
+      .github/workflows/fuzzing.yml
+      .github/workflows/prombench.yml
+      .github/workflows/golangci-lint.yml

CHANGELOG.md

@@ -1,3 +1,34 @@
+## 0.23.0 / 2022-12-07
+
+* [CHANGE] Print help and version to standard out ([#469](https://github.com/prometheus/statsd_exporter/pull/469))
+* [FEATURE] Support experimental native histograms ([#474](https://github.com/prometheus/statsd_exporter/pull/474))
+
+## 0.22.8 / 2022-09-13
+
+* [BUGFIX] Prevent poisoning with gauge/distribution naming collision ([#461](https://github.com/prometheus/statsd_exporter/pull/461))
+* [CHANGE] Update `client_golang` dependency ([#463](https://github.com/prometheus/statsd_exporter/pull/463))
+
+## 0.22.7 / 2022-07-08
+
+* [CHANGE] Build with Go 1.18 ([#450](https://github.com/prometheus/statsd_exporter/pull/450))
+
+## 0.22.6 / 2022-07-08
+
+* [CHANGE] Update dependencies ([#449](https://github.com/prometheus/statsd_exporter/pull/449))
+
+This is another housekeeping release.
+
+## 0.22.5 / 2022-05-06
+
+* [ENHANCEMENT] Add metric for total lines relayed ([#434](https://github.com/prometheus/statsd_exporter/pull/434))
+
+This release is built with Go 1.17.9, to address security issues in Go.
+
+## 0.22.4 / 2021-11-26
+
+* [BUGFIX] Make Docker image compatible with the runAsNonRoot setting in Kubernetes pods ([#409](https://github.com/prometheus/statsd_exporter/pull/409))
+* [BUGFIX] Library: fix support for custom Registerers with histograms and summaries ([#410](https://github.com/prometheus/statsd_exporter/pull/410))
+
 ## 0.22.3 / 2021-10-26
 
 * [BUGFIX] Accept metrics with multiple dashes even if not mapped ([#402](https://github.com/prometheus/statsd_exporter/pull/402))
@@ -384,7 +415,6 @@ NOTE: This release renames `statsd_bridge` to `statsd_exporter`
 * [ENHANCEMENT] add root endpoint with redirect ([#25](https://github.com/prometheus/statsd_exporter/pulls/25))
 * [CHANGE] rename bridge to exporter ([#26](https://github.com/prometheus/statsd_exporter/pulls/26))
 
-
 ## 0.1.0 / 2015-04-17
 
 * Initial release

CODE_OF_CONDUCT.md

@@ -1,3 +1,3 @@
-## Prometheus Community Code of Conduct
+# Prometheus Community Code of Conduct
 
-Prometheus follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md).
+Prometheus follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/main/code-of-conduct.md).

Dockerfile

@@ -7,7 +7,7 @@ ARG ARCH="amd64"
 ARG OS="linux"
 COPY .build/${OS}-${ARCH}/statsd_exporter /bin/statsd_exporter
 
-USER        nobody
+USER        65534
 EXPOSE      9102 9125 9125/udp
 HEALTHCHECK CMD wget --spider -S "http://localhost:9102/metrics" -T 60 2>&1 || exit 1
 ENTRYPOINT  [ "/bin/statsd_exporter" ]

Makefile.common

@@ -36,29 +36,6 @@ GO_VERSION        ?= $(shell $(GO) version)
 GO_VERSION_NUMBER ?= $(word 3, $(GO_VERSION))
 PRE_GO_111        ?= $(shell echo $(GO_VERSION_NUMBER) | grep -E 'go1\.(10|[0-9])\.')
 
-GOVENDOR :=
-GO111MODULE :=
-ifeq (, $(PRE_GO_111))
-	ifneq (,$(wildcard go.mod))
-		# Enforce Go modules support just in case the directory is inside GOPATH (and for Travis CI).
-		GO111MODULE := on
-
-		ifneq (,$(wildcard vendor))
-			# Always use the local vendor/ directory to satisfy the dependencies.
-			GOOPTS := $(GOOPTS) -mod=vendor
-		endif
-	endif
-else
-	ifneq (,$(wildcard go.mod))
-		ifneq (,$(wildcard vendor))
-$(warning This repository requires Go >= 1.11 because of Go modules)
-$(warning Some recipes may not work as expected as the current Go runtime is '$(GO_VERSION_NUMBER)')
-		endif
-	else
-		# This repository isn't using Go modules (yet).
-		GOVENDOR := $(FIRST_GOPATH)/bin/govendor
-	endif
-endif
 PROMU        := $(FIRST_GOPATH)/bin/promu
 pkgs          = ./...
 
@@ -78,19 +55,22 @@ ifneq ($(shell which gotestsum),)
 endif
 endif
 
-PROMU_VERSION ?= 0.12.0
+PROMU_VERSION ?= 0.14.0
 PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
 
+SKIP_GOLANGCI_LINT :=
 GOLANGCI_LINT :=
 GOLANGCI_LINT_OPTS ?=
-GOLANGCI_LINT_VERSION ?= v1.42.0
+GOLANGCI_LINT_VERSION ?= v1.49.0
 # golangci-lint only supports linux, darwin and windows platforms on i386/amd64.
 # windows isn't included here because of the path separator being different.
 ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux darwin))
 	ifeq ($(GOHOSTARCH),$(filter $(GOHOSTARCH),amd64 i386))
 		# If we're in CI and there is an Actions file, that means the linter
 		# is being run in Actions, so we don't need to run it here.
-		ifeq (,$(CIRCLE_JOB))
+		ifneq (,$(SKIP_GOLANGCI_LINT))
+			GOLANGCI_LINT :=
+		else ifeq (,$(CIRCLE_JOB))
 			GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint
 		else ifeq (,$(wildcard .github/workflows/golangci-lint.yml))
 			GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint
@@ -150,11 +130,7 @@ common-check_license:
 .PHONY: common-deps
 common-deps:
 	@echo ">> getting dependencies"
-ifdef GO111MODULE
-	GO111MODULE=$(GO111MODULE) $(GO) mod download
-else
-	$(GO) get $(GOOPTS) -t ./...
-endif
+	$(GO) mod download
 
 .PHONY: update-go-deps
 update-go-deps:
@@ -162,20 +138,17 @@ update-go-deps:
 	@for m in $$($(GO) list -mod=readonly -m -f '{{ if and (not .Indirect) (not .Main)}}{{.Path}}{{end}}' all); do \
 		$(GO) get -d $$m; \
 	done
-	GO111MODULE=$(GO111MODULE) $(GO) mod tidy
-ifneq (,$(wildcard vendor))
-	GO111MODULE=$(GO111MODULE) $(GO) mod vendor
-endif
+	$(GO) mod tidy
 
 .PHONY: common-test-short
 common-test-short: $(GOTEST_DIR)
 	@echo ">> running short tests"
-	GO111MODULE=$(GO111MODULE) $(GOTEST) -short $(GOOPTS) $(pkgs)
+	$(GOTEST) -short $(GOOPTS) $(pkgs)
 
 .PHONY: common-test
 common-test: $(GOTEST_DIR)
 	@echo ">> running all tests"
-	GO111MODULE=$(GO111MODULE) $(GOTEST) $(test-flags) $(GOOPTS) $(pkgs)
+	$(GOTEST) $(test-flags) $(GOOPTS) $(pkgs)
 
 $(GOTEST_DIR):
 	@mkdir -p $@
@@ -183,25 +156,21 @@ $(GOTEST_DIR):
 .PHONY: common-format
 common-format:
 	@echo ">> formatting code"
-	GO111MODULE=$(GO111MODULE) $(GO) fmt $(pkgs)
+	$(GO) fmt $(pkgs)
 
 .PHONY: common-vet
 common-vet:
 	@echo ">> vetting code"
-	GO111MODULE=$(GO111MODULE) $(GO) vet $(GOOPTS) $(pkgs)
+	$(GO) vet $(GOOPTS) $(pkgs)
 
 .PHONY: common-lint
 common-lint: $(GOLANGCI_LINT)
 ifdef GOLANGCI_LINT
 	@echo ">> running golangci-lint"
-ifdef GO111MODULE
 # 'go list' needs to be executed before staticcheck to prepopulate the modules cache.
 # Otherwise staticcheck might fail randomly for some reason not yet explained.
-	GO111MODULE=$(GO111MODULE) $(GO) list -e -compiled -test=true -export=false -deps=true -find=false -tags= -- ./... > /dev/null
-	GO111MODULE=$(GO111MODULE) $(GOLANGCI_LINT) run $(GOLANGCI_LINT_OPTS) $(pkgs)
-else
-	$(GOLANGCI_LINT) run $(pkgs)
-endif
+	$(GO) list -e -compiled -test=true -export=false -deps=true -find=false -tags= -- ./... > /dev/null
+	$(GOLANGCI_LINT) run $(GOLANGCI_LINT_OPTS) $(pkgs)
 endif
 
 .PHONY: common-yamllint
@@ -218,28 +187,15 @@ endif
 common-staticcheck: lint
 
 .PHONY: common-unused
-common-unused: $(GOVENDOR)
-ifdef GOVENDOR
-	@echo ">> running check for unused packages"
-	@$(GOVENDOR) list +unused | grep . && exit 1 || echo 'No unused packages'
-else
-ifdef GO111MODULE
+common-unused:
 	@echo ">> running check for unused/missing packages in go.mod"
-	GO111MODULE=$(GO111MODULE) $(GO) mod tidy
-ifeq (,$(wildcard vendor))
+	$(GO) mod tidy
 	@git diff --exit-code -- go.sum go.mod
-else
-	@echo ">> running check for unused packages in vendor/"
-	GO111MODULE=$(GO111MODULE) $(GO) mod vendor
-	@git diff --exit-code -- go.sum go.mod vendor/
-endif
-endif
-endif
 
 .PHONY: common-build
 common-build: promu
 	@echo ">> building binaries"
-	GO111MODULE=$(GO111MODULE) $(PROMU) build --prefix $(PREFIX) $(PROMU_BINARIES)
+	$(PROMU) build --prefix $(PREFIX) $(PROMU_BINARIES)
 
 .PHONY: common-tarball
 common-tarball: promu
@@ -295,12 +251,6 @@ $(GOLANGCI_LINT):
 		| sh -s -- -b $(FIRST_GOPATH)/bin $(GOLANGCI_LINT_VERSION)
 endif
 
-ifdef GOVENDOR
-.PHONY: $(GOVENDOR)
-$(GOVENDOR):
-	GOOS= GOARCH= $(GO) get -u github.com/kardianos/govendor
-endif
-
 .PHONY: precheck
 precheck::
 

README.md

@@ -296,7 +296,6 @@ mappings:
   name: "${2}_total"
   labels:
     provider: "$1"
-mappings:
 - match: "(.*)\\.(.*)--(.*)\\.status\.(.*)\\.count"
   match_type: regex
   name: "request_total"
@@ -317,6 +316,27 @@ mappings:
     provider: "$1"
 ```
 
+#### Special match groups
+
+When using regex, the match group `0` is the full match and can be used to attach labels to the metric.
+Example:
+
+```yaml
+mappings:
+- match: ".+"
+  match_type: regex
+  name: "$0"
+  labels:
+    statsd_metric_name: "$0"
+```
+
+If a metric `my.statsd_counter` is received, the metric name will **still** be mapped to `my_statsd_counter` (Prometheus compatible name).
+But the metric will also have the label `statsd_metric_name` with the value `my.statsd_counter` (unchanged value).
+
+Note: If you use the `match` like the example (i.e. `.+`), be aware that it will be a "catch-all" block. So it should come at the very end of the mapping list.
+
+The same is not achievable with glob matching, for more details check [this issue](https://github.com/prometheus/statsd_exporter/issues/444).
+
 ### Naming, labels, and help
 
 Please note that metrics with the same name must also have the same set of
@@ -382,6 +402,8 @@ mappings:
   observer_type: histogram
   histogram_options:
     buckets: [ 0.01, 0.025, 0.05, 0.1 ]
+    native_histogram_bucket_factor: 1.1
+    native_histogram_max_buckets: 256
   name: "my_timer"
   labels:
     provider: "$2"
@@ -395,6 +417,11 @@ values](https://godoc.org/github.com/prometheus/client_golang/prometheus#pkg-var
 are used for the histogram buckets:
 `[.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10]`.
 `+Inf` is added automatically.
+If your Prometheus server is enabled to scrape native histograms (v2.40.0+), 
+then you can set the `native_histogram_bucket_factor` to configure precision of the
+buckets in the sparse histogram. More about this in the original [client_golang docs](https://github.com/prometheus/client_golang/blob/449b46435075e6e069e05af920fe028b941033cf/prometheus/histogram.go#L399-L430).
+Also, a configuration of the maximum number of buckets can be set with `native_histogram_max_buckets`, this
+avoids the histograms to grow too large in memory. More about this in the original [client_golang docs](https://github.com/prometheus/client_golang/blob/449b46435075e6e069e05af920fe028b941033cf/prometheus/histogram.go#L443-L467).
 
 `observer_type` is only used when the statsd metric type is a timer, histogram, or distribution.
 `buckets` is only used when the statsd metric type is one of these, and the `observer_type` is set to `histogram`.
@@ -449,6 +476,8 @@ defaults:
   observer_type: histogram
   histogram_options:
     buckets: [.005, .01, .025, .05, .1, .25, .5, 1, 2.5 ]
+    native_histogram_bucket_factor: 1.1
+    native_histogram_max_buckets: 256
   summary_options:
     quantiles:
       - quantile: 0.99
@@ -528,7 +557,7 @@ Possible values for `match_metric_type` are `gauge`, `counter` and `observer`.
 
 There is a cache used to improve the performance of the metric mapping, that can greatly improvement performance.
 The cache has a default maximum of 1000 unique statsd metric names -> prometheus metrics mappings that it can store.
-This maximum can be adjust using the `statsd.cache-size` flag.
+This maximum can be adjusted using the `statsd.cache-size` flag.
 
 If the maximum is reached, entries are by default rotated using the [least recently used replacement policy](https://en.wikipedia.org/wiki/Cache_replacement_policies#Least_recently_used_(LRU)). This strategy is optimal when memory is constrained as only the most recent entries are retained.
 

SECURITY.md

@@ -3,4 +3,4 @@
 The Prometheus security policy, including how to report vulnerabilities, can be
 found here:
 
-https://prometheus.io/docs/operating/security/
+<https://prometheus.io/docs/operating/security/>

VERSION

@@ -1 +1 @@
-0.22.3
+0.23.0

go.mod

@@ -1,13 +1,27 @@
 module github.com/prometheus/statsd_exporter
 
+go 1.18
+
 require (
-	github.com/go-kit/log v0.1.0
+	github.com/go-kit/log v0.2.1
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da
-	github.com/prometheus/client_golang v1.11.0
-	github.com/prometheus/client_model v0.2.0
-	github.com/prometheus/common v0.30.0
+	github.com/prometheus/client_golang v1.14.0
+	github.com/prometheus/client_model v0.3.0
+	github.com/prometheus/common v0.37.0
+	github.com/stvp/go-udp-testing v0.0.0-20201019212854-469649b16807
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 	gopkg.in/yaml.v2 v2.4.0
 )
 
-go 1.13
+require (
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
+	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/go-logfmt/logfmt v0.5.1 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/prometheus/procfs v0.8.0 // indirect
+	golang.org/x/sys v0.0.0-20220708085239-5a0f0661e09d // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+)

go.sum

@@ -38,15 +38,17 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafo
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d h1:UQZhZ2O0vMHr2cI+DC1Mbh0TJxzA3RcLoMsFw+aXw7E=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
+github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 h1:s6gZFSlWYmbqAuRjVTiNNhvNRfY2Wxp9nhfyel4rklc=
+github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137/go.mod h1:OMCwj8VM1Kc9e19TLln2VL61YJF0x1XFtfdL4JdbSyE=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 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/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
+github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
@@ -64,13 +66,15 @@ github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
-github.com/go-kit/log v0.1.0 h1:DGJh0Sm43HbOeYDNnVZFl8BvcYVvjD5bqYJvp0REbwQ=
 github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
+github.com/go-kit/log v0.2.0/go.mod h1:NwTd00d/i8cPZ3xOwwiv2PO5MOcx78fFErGNcVmBjv0=
+github.com/go-kit/log v0.2.1 h1:MRVx0/zhvdseW+Gza6N9rVzU/IVzaeE1SFI4raAhmBU=
+github.com/go-kit/log v0.2.1/go.mod h1:NwTd00d/i8cPZ3xOwwiv2PO5MOcx78fFErGNcVmBjv0=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
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@@ -99,8 +103,10 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
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@@ -111,8 +117,8 @@ github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -133,6 +139,7 @@ github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX
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@@ -152,34 +159,40 @@ github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJ
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@@ -190,6 +203,8 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
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@@ -263,12 +278,15 @@ golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81R
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@@ -312,15 +330,21 @@ golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7w
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 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -367,7 +391,6 @@ golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
@@ -442,8 +465,10 @@ google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 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 h1:7QnIQpGRHE5RnLKnESfDoxm2dTapTZua5a0kS0A+VXQ=
 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 v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

main.go

@@ -265,6 +265,7 @@ func main() {
 	promlogConfig := &promlog.Config{}
 	flag.AddFlags(kingpin.CommandLine, promlogConfig)
 	kingpin.Version(version.Print("statsd_exporter"))
+	kingpin.CommandLine.UsageWriter(os.Stdout)
 	kingpin.HelpFlag.Short('h')
 	kingpin.Parse()
 	logger := promlog.New(promlogConfig)

pkg/exporter/exporter_test.go

@@ -401,6 +401,76 @@ func TestConflictingMetrics(t *testing.T) {
 				},
 			},
 		},
+		{
+			name:     "histogram vs counter with count suffix",
+			expected: []float64{2},
+			in: event.Events{
+				&event.ObserverEvent{
+					OMetricName: "histogram_test1",
+					OValue:      2,
+				},
+				&event.CounterEvent{
+					CMetricName: "histogram_test1_count",
+					CValue:      1,
+				},
+			},
+		},
+		{
+			name:     "histogram vs counter with sum suffix",
+			expected: []float64{2},
+			in: event.Events{
+				&event.ObserverEvent{
+					OMetricName: "histogram_test1",
+					OValue:      2,
+				},
+				&event.CounterEvent{
+					CMetricName: "histogram_test1_sum",
+					CValue:      1,
+				},
+			},
+		},
+		{
+			name:     "histogram vs counter with bucket suffix",
+			expected: []float64{2},
+			in: event.Events{
+				&event.ObserverEvent{
+					OMetricName: "histogram_test1",
+					OValue:      2,
+				},
+				&event.CounterEvent{
+					CMetricName: "histogram_test1_bucket",
+					CValue:      1,
+				},
+			},
+		},
+		{
+			name:     "histogram vs gauge with sum suffix",
+			expected: []float64{2},
+			in: event.Events{
+				&event.ObserverEvent{
+					OMetricName: "histogram_test1",
+					OValue:      2,
+				},
+				&event.GaugeEvent{
+					GMetricName: "histogram_test1_sum",
+					GValue:      1,
+				},
+			},
+		},
+		{
+			name:     "histogram vs gauge with count suffix",
+			expected: []float64{2},
+			in: event.Events{
+				&event.ObserverEvent{
+					OMetricName: "histogram_test1",
+					OValue:      2,
+				},
+				&event.GaugeEvent{
+					GMetricName: "histogram_test1_count",
+					GValue:      1,
+				},
+			},
+		},
 		{
 			name:     "counter vs histogram",
 			expected: []float64{1},
@@ -520,10 +590,11 @@ mappings:
 				events <- s.in
 				close(events)
 			}()
-			ex := NewExporter(prometheus.DefaultRegisterer, testMapper, log.NewNopLogger(), eventsActions, eventsUnmapped, errorEventStats, eventStats, conflictingEventStats, metricsCount)
+			reg := prometheus.NewRegistry()
+			ex := NewExporter(reg, testMapper, log.NewNopLogger(), eventsActions, eventsUnmapped, errorEventStats, eventStats, conflictingEventStats, metricsCount)
 			ex.Listen(events)
 
-			metrics, err := prometheus.DefaultGatherer.Gather()
+			metrics, err := reg.Gather()
 			if err != nil {
 				t.Fatalf("Cannot gather from DefaultGatherer: %v", err)
 			}

pkg/mapper/mapper.go

@@ -15,7 +15,7 @@ package mapper
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"regexp"
 	"sync"
 	"time"
@@ -64,7 +64,9 @@ type SummaryOptions struct {
 }
 
 type HistogramOptions struct {
-	Buckets []float64 `yaml:"buckets"`
+	Buckets                     []float64 `yaml:"buckets"`
+	NativeHistogramBucketFactor float64   `yaml:"native_histogram_bucket_factor"`
+	NativeHistogramMaxBuckets   uint32    `yaml:"native_histogram_max_buckets"`
 }
 
 type metricObjective struct {
@@ -88,6 +90,12 @@ func (m *MetricMapper) InitFromYAMLString(fileContents string) error {
 	if len(n.Defaults.HistogramOptions.Buckets) == 0 {
 		n.Defaults.HistogramOptions.Buckets = prometheus.DefBuckets
 	}
+	if n.Defaults.HistogramOptions.NativeHistogramBucketFactor == 0 {
+		n.Defaults.HistogramOptions.NativeHistogramBucketFactor = 1.1
+	}
+	if n.Defaults.HistogramOptions.NativeHistogramMaxBuckets <= 0 {
+		n.Defaults.HistogramOptions.NativeHistogramMaxBuckets = 256
+	}
 
 	if len(n.Defaults.SummaryOptions.Quantiles) == 0 {
 		n.Defaults.SummaryOptions.Quantiles = defaultQuantiles
@@ -233,6 +241,10 @@ func (m *MetricMapper) InitFromYAMLString(fileContents string) error {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
+	if m.Logger == nil {
+		m.Logger = log.NewNopLogger()
+	}
+
 	m.Defaults = n.Defaults
 	m.Mappings = n.Mappings
 
@@ -259,15 +271,11 @@ func (m *MetricMapper) InitFromYAMLString(fileContents string) error {
 		m.MappingsCount.Set(float64(len(n.Mappings)))
 	}
 
-	if m.Logger == nil {
-		m.Logger = log.NewNopLogger()
-	}
-
 	return nil
 }
 
 func (m *MetricMapper) InitFromFile(fileName string) error {
-	mappingStr, err := ioutil.ReadFile(fileName)
+	mappingStr, err := os.ReadFile(fileName)
 	if err != nil {
 		return err
 	}

pkg/mapper/mapper_benchmark_test.go

@@ -18,6 +18,8 @@ import (
 	"math/rand"
 	"testing"
 
+	"github.com/go-kit/log"
+
 	"github.com/prometheus/statsd_exporter/pkg/mappercache/lru"
 	"github.com/prometheus/statsd_exporter/pkg/mappercache/randomreplacement"
 )
@@ -242,7 +244,9 @@ mappings:
 		"foo.bar.baz",
 	}
 
-	mapper := MetricMapper{}
+	mapper := MetricMapper{
+		Logger: log.NewNopLogger(),
+	}
 	err := mapper.InitFromYAMLString(config)
 	if err != nil {
 		b.Fatalf("Config load error: %s %s", config, err)

pkg/registry/registry.go

@@ -19,6 +19,7 @@ import (
 	"hash"
 	"hash/fnv"
 	"sort"
+	"strings"
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
@@ -165,6 +166,11 @@ func (r *Registry) GetCounter(metricName string, labels prometheus.Labels, help
 		return nil, fmt.Errorf("metric with name %s is already registered", metricName)
 	}
 
+	err := r.checkHistogramNameCollision(metricName)
+	if err != nil {
+		return nil, err
+	}
+
 	var counterVec *prometheus.CounterVec
 	if vh == nil {
 		metricsCount.WithLabelValues("counter").Inc()
@@ -181,7 +187,6 @@ func (r *Registry) GetCounter(metricName string, labels prometheus.Labels, help
 	}
 
 	var counter prometheus.Counter
-	var err error
 	if counter, err = counterVec.GetMetricWith(labels); err != nil {
 		return nil, err
 	}
@@ -190,6 +195,18 @@ func (r *Registry) GetCounter(metricName string, labels prometheus.Labels, help
 	return counter, nil
 }
 
+func (r *Registry) checkHistogramNameCollision(metricName string) error {
+	histogramSuffixes := []string{"_bucket", "_count", "_sum"}
+	for _, suffix := range histogramSuffixes {
+		if strings.HasSuffix(metricName, suffix) {
+			if r.MetricConflicts(strings.TrimSuffix(metricName, suffix), metrics.CounterMetricType) {
+				return fmt.Errorf("metric with name %s is already registered", metricName)
+			}
+		}
+	}
+	return nil
+}
+
 func (r *Registry) GetGauge(metricName string, labels prometheus.Labels, help string, mapping *mapper.MetricMapping, metricsCount *prometheus.GaugeVec) (prometheus.Gauge, error) {
 	hash, labelNames := r.HashLabels(labels)
 	vh, mh := r.Get(metricName, hash, metrics.GaugeMetricType)
@@ -201,6 +218,11 @@ func (r *Registry) GetGauge(metricName string, labels prometheus.Labels, help st
 		return nil, fmt.Errorf("metrics.Metric with name %s is already registered", metricName)
 	}
 
+	err := r.checkHistogramNameCollision(metricName)
+	if err != nil {
+		return nil, fmt.Errorf("metrics.Metric with name %s is already registered", metricName)
+	}
+
 	var gaugeVec *prometheus.GaugeVec
 	if vh == nil {
 		metricsCount.WithLabelValues("gauge").Inc()
@@ -217,7 +239,6 @@ func (r *Registry) GetGauge(metricName string, labels prometheus.Labels, help st
 	}
 
 	var gauge prometheus.Gauge
-	var err error
 	if gauge, err = gaugeVec.GetMetricWith(labels); err != nil {
 		return nil, err
 	}
@@ -253,13 +274,25 @@ func (r *Registry) GetHistogram(metricName string, labels prometheus.Labels, hel
 		if mapping.HistogramOptions != nil && len(mapping.HistogramOptions.Buckets) > 0 {
 			buckets = mapping.HistogramOptions.Buckets
 		}
+
+		bucketFactor := r.Mapper.Defaults.HistogramOptions.NativeHistogramBucketFactor
+		if mapping.HistogramOptions != nil && mapping.HistogramOptions.NativeHistogramBucketFactor > 0 {
+			bucketFactor = mapping.HistogramOptions.NativeHistogramBucketFactor
+		}
+
+		maxBuckets := r.Mapper.Defaults.HistogramOptions.NativeHistogramMaxBuckets
+		if mapping.HistogramOptions != nil && mapping.HistogramOptions.NativeHistogramMaxBuckets > 0 {
+			maxBuckets = mapping.HistogramOptions.NativeHistogramMaxBuckets
+		}
 		histogramVec = prometheus.NewHistogramVec(prometheus.HistogramOpts{
-			Name:    metricName,
-			Help:    help,
-			Buckets: buckets,
+			Name:                           metricName,
+			Help:                           help,
+			Buckets:                        buckets,
+			NativeHistogramBucketFactor:    bucketFactor,
+			NativeHistogramMaxBucketNumber: maxBuckets,
 		}, labelNames)
 
-		if err := prometheus.Register(uncheckedCollector{histogramVec}); err != nil {
+		if err := r.Registerer.Register(uncheckedCollector{histogramVec}); err != nil {
 			return nil, err
 		}
 	} else {
@@ -328,7 +361,7 @@ func (r *Registry) GetSummary(metricName string, labels prometheus.Labels, help
 			BufCap:     summaryOptions.BufCap,
 		}, labelNames)
 
-		if err := prometheus.Register(uncheckedCollector{summaryVec}); err != nil {
+		if err := r.Registerer.Register(uncheckedCollector{summaryVec}); err != nil {
 			return nil, err
 		}
 	} else {

pkg/relay/relay.go

@@ -20,6 +20,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/prometheus/statsd_exporter/pkg/clock"
+
 	"github.com/go-kit/log"
 
 	"github.com/prometheus/client_golang/prometheus"
@@ -34,8 +36,9 @@ type Relay struct {
 	logger        log.Logger
 	packetLength  uint
 
-	packetsTotal   prometheus.Counter
-	longLinesTotal prometheus.Counter
+	packetsTotal      prometheus.Counter
+	longLinesTotal    prometheus.Counter
+	relayedLinesTotal prometheus.Counter
 }
 
 var (
@@ -53,6 +56,13 @@ var (
 		},
 		[]string{"target"},
 	)
+	relayLinesRelayedTotal = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "statsd_exporter_relay_lines_relayed_total",
+			Help: "The number of lines that were buffered to be relayed.",
+		},
+		[]string{"target"},
+	)
 )
 
 // NewRelay creates a statsd UDP relay. It can be used to send copies of statsd raw
@@ -76,8 +86,9 @@ func NewRelay(l log.Logger, target string, packetLength uint) (*Relay, error) {
 		logger:        l,
 		packetLength:  packetLength,
 
-		packetsTotal:   relayPacketsTotal.WithLabelValues(target),
-		longLinesTotal: relayLongLinesTotal.WithLabelValues(target),
+		packetsTotal:      relayPacketsTotal.WithLabelValues(target),
+		longLinesTotal:    relayLongLinesTotal.WithLabelValues(target),
+		relayedLinesTotal: relayLinesRelayedTotal.WithLabelValues(target),
 	}
 
 	// Startup the UDP sender.
@@ -91,7 +102,7 @@ func (r *Relay) relayOutput() {
 	var buffer bytes.Buffer
 	var err error
 
-	relayInterval := time.NewTicker(1 * time.Second)
+	relayInterval := clock.NewTicker(1 * time.Second)
 	defer relayInterval.Stop()
 
 	for {
@@ -151,5 +162,6 @@ func (r *Relay) RelayLine(l string) {
 	if !strings.HasSuffix(l, "\n") {
 		l = l + "\n"
 	}
+	r.relayedLinesTotal.Inc()
 	r.bufferChannel <- []byte(l)
 }

pkg/relay/relay_test.go

@@ -0,0 +1,176 @@
+// Copyright 2022 The Prometheus Authors
+// 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.
+
+package relay
+
+import (
+	"fmt"
+	"runtime"
+	"testing"
+	"time"
+
+	"github.com/go-kit/log"
+	"github.com/prometheus/client_golang/prometheus"
+	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/statsd_exporter/pkg/clock"
+	"github.com/stvp/go-udp-testing"
+)
+
+func TestRelay_RelayLine(t *testing.T) {
+	type args struct {
+		lines    []string
+		expected string
+	}
+
+	tests := []struct {
+		name string
+		args args
+	}{
+		{
+			name: "multiple lines",
+			args: args{
+				lines:    []string{"foo5:100|c|#tag1:bar,#tag2:baz", "foo2:200|c|#tag1:bar,#tag2:baz"},
+				expected: "foo5:100|c|#tag1:bar,#tag2:baz\n",
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		udp.SetAddr(":1160")
+		t.Run(tt.name, func(t *testing.T) {
+			tickerCh := make(chan time.Time)
+			clock.ClockInstance = &clock.Clock{
+				TickerCh: tickerCh,
+			}
+			clock.ClockInstance.Instant = time.Unix(0, 0)
+
+			logger := log.NewNopLogger()
+			r, err := NewRelay(
+				logger,
+				"localhost:1160",
+				200,
+			)
+
+			if err != nil {
+				t.Errorf("Did not expect error while creating relay.")
+			}
+
+			udp.ShouldReceive(t, tt.args.expected, func() {
+				for _, line := range tt.args.lines {
+					r.RelayLine(line)
+				}
+
+				for goSchedTimes := 0; goSchedTimes < 1000; goSchedTimes++ {
+					if len(r.bufferChannel) == 0 {
+						break
+					}
+					runtime.Gosched()
+				}
+
+				// Tick time forward to trigger a packet send.
+				clock.ClockInstance.Instant = time.Unix(1, 10)
+				clock.ClockInstance.TickerCh <- time.Unix(0, 0)
+			})
+
+			metrics, err := prometheus.DefaultGatherer.Gather()
+			if err != nil {
+				t.Fatalf("Cannot gather from DefaultGatherer: %v", err)
+			}
+
+			metricNames := map[string]float64{
+				"statsd_exporter_relay_long_lines_total":    0,
+				"statsd_exporter_relay_lines_relayed_total": float64(len(tt.args.lines)),
+			}
+			for metricName, expectedValue := range metricNames {
+				metric := getFloat64(metrics, metricName, prometheus.Labels{"target": "localhost:1160"})
+
+				if metric == nil {
+					t.Fatalf("Could not find time series with first label set for metric: %s", metricName)
+				}
+				if *metric != expectedValue {
+					t.Errorf("Expected metric %s to be %f, got %f", metricName, expectedValue, *metric)
+				}
+			}
+
+			prometheus.Unregister(relayLongLinesTotal)
+			prometheus.Unregister(relayLinesRelayedTotal)
+		})
+	}
+}
+
+// getFloat64 search for metric by name in array of MetricFamily and then search a value by labels.
+// Method returns a value or nil if metric is not found.
+func getFloat64(metrics []*dto.MetricFamily, name string, labels prometheus.Labels) *float64 {
+	var metricFamily *dto.MetricFamily
+	for _, m := range metrics {
+		if *m.Name == name {
+			metricFamily = m
+			break
+		}
+	}
+	if metricFamily == nil {
+		return nil
+	}
+
+	var metric *dto.Metric
+	labelStr := fmt.Sprintf("%v", labels)
+	for _, m := range metricFamily.Metric {
+		l := labelPairsAsLabels(m.GetLabel())
+		ls := fmt.Sprintf("%v", l)
+		if labelStr == ls {
+			metric = m
+			break
+		}
+	}
+	if metric == nil {
+		return nil
+	}
+
+	var value float64
+	if metric.Gauge != nil {
+		value = metric.Gauge.GetValue()
+		return &value
+	}
+	if metric.Counter != nil {
+		value = metric.Counter.GetValue()
+		return &value
+	}
+	if metric.Histogram != nil {
+		value = metric.Histogram.GetSampleSum()
+		return &value
+	}
+	if metric.Summary != nil {
+		value = metric.Summary.GetSampleSum()
+		return &value
+	}
+	if metric.Untyped != nil {
+		value = metric.Untyped.GetValue()
+		return &value
+	}
+	panic(fmt.Errorf("collected a non-gauge/counter/histogram/summary/untyped metric: %s", metric))
+}
+
+func labelPairsAsLabels(pairs []*dto.LabelPair) (labels prometheus.Labels) {
+	labels = prometheus.Labels{}
+	for _, pair := range pairs {
+		if pair.Name == nil {
+			continue
+		}
+		value := ""
+		if pair.Value != nil {
+			value = *pair.Value
+		}
+		labels[*pair.Name] = value
+	}
+	return
+}