2024-06-02 21:39:36 +00:00
23 changed files with 622 additions and 642 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@ -1,11 +1,11 @@
 version: 2.1
 orbs:
-  prometheus: prometheus/prometheus@0.17.1
+  prometheus: prometheus/prometheus@0.16.0
 executors:
  # Whenever the Go version is updated here, .promu.yml should also be updated.
  golang:
    docker:
-      - image: cimg/go:1.21
+      - image: cimg/go:1.19
 jobs:
  test:
    executor: golang
--- a/.github/workflows/container_description.yml
+++ b/.github/workflows/container_description.yml
@ -1,52 +0,0 @@
---
-name: Push README to Docker Hub
-on:
-  push:
-    paths:
-      - "README.md"
-      - ".github/workflows/container_description.yml"
-    branches: [ main, master ]
-
-permissions:
-  contents: read
-
-jobs:
-  PushDockerHubReadme:
-    runs-on: ubuntu-latest
-    name: Push README to Docker Hub
-    if: github.repository_owner == 'prometheus' || github.repository_owner == 'prometheus-community' # Don't run this workflow on forks.
-    steps:
-      - name: git checkout
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      - name: Set docker hub repo name
-        run: echo "DOCKER_REPO_NAME=$(make docker-repo-name)" >> $GITHUB_ENV
-      - name: Push README to Dockerhub
-        uses: christian-korneck/update-container-description-action@d36005551adeaba9698d8d67a296bd16fa91f8e8 # v1
-        env:
-          DOCKER_USER: ${{ secrets.DOCKER_HUB_LOGIN }}
-          DOCKER_PASS: ${{ secrets.DOCKER_HUB_PASSWORD }}
-        with:
-          destination_container_repo: ${{ env.DOCKER_REPO_NAME }}
-          provider: dockerhub
-          short_description: ${{ env.DOCKER_REPO_NAME }}
-          readme_file: 'README.md'
-
-  PushQuayIoReadme:
-    runs-on: ubuntu-latest
-    name: Push README to quay.io
-    if: github.repository_owner == 'prometheus' || github.repository_owner == 'prometheus-community' # Don't run this workflow on forks.
-    steps:
-      - name: git checkout
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      - name: Set quay.io org name
-        run: echo "DOCKER_REPO=$(echo quay.io/${GITHUB_REPOSITORY_OWNER} | tr -d '-')" >> $GITHUB_ENV
-      - name: Set quay.io repo name
-        run: echo "DOCKER_REPO_NAME=$(make docker-repo-name)" >> $GITHUB_ENV
-      - name: Push README to quay.io
-        uses: christian-korneck/update-container-description-action@d36005551adeaba9698d8d67a296bd16fa91f8e8 # v1
-        env:
-          DOCKER_APIKEY: ${{ secrets.QUAY_IO_API_TOKEN }}
-        with:
-          destination_container_repo: ${{ env.DOCKER_REPO_NAME }}
-          provider: quay
-          readme_file: 'README.md'
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@ -1,5 +1,3 @@
---
-# This action is synced from https://github.com/prometheus/prometheus
 name: golangci-lint
 on:
  push:
@ -12,27 +10,21 @@ on:
      - ".golangci.yml"
  pull_request:

-permissions:  # added using https://github.com/step-security/secure-repo
-  contents: read
-
 jobs:
  golangci:
-    permissions:
-      contents: read  # for actions/checkout to fetch code
-      pull-requests: read  # for golangci/golangci-lint-action to fetch pull requests
    name: lint
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        uses: actions/checkout@v3
      - name: install Go
-        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+        uses: actions/setup-go@v2
        with:
-          go-version: 1.22.x
+          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@3cfe3a4abbb849e10058ce4af15d205b6da42804 # v4.0.0
+        uses: golangci/golangci-lint-action@v3.2.0
        with:
-          version: v1.56.2
+          version: v1.45.2
--- a/.promu.yml
+++ b/.promu.yml
@ -1,10 +1,11 @@
 go:
    # Whenever the Go version is updated here, .circle/config.yml should also
    # be updated.
-    version: 1.21
+    version: 1.19
 repository:
    path: github.com/prometheus/statsd_exporter
 build:
+    flags: -a -tags 'netgo static_build'
    ldflags: |
        -X github.com/prometheus/common/version.Version={{.Version}}
        -X github.com/prometheus/common/version.Revision={{.Revision}}
--- a/.yamllint
+++ b/.yamllint
@ -1,7 +1,5 @@
 ---
 extends: default
-ignore: |
-  ui/react-app/node_modules

 rules:
  braces:
@ -22,4 +20,9 @@ rules:
      config/testdata/section_key_dup.bad.yml
  line-length: disable
  truthy:
-    check-keys: false
+    ignore: |
+      .github/workflows/codeql-analysis.yml
+      .github/workflows/funcbench.yml
+      .github/workflows/fuzzing.yml
+      .github/workflows/prombench.yml
+      .github/workflows/golangci-lint.yml
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -1,47 +1,3 @@
-## 0.26.1 / 2024-03-22
-
-* [SECURITY] Update dependencies, including `google.golang.org/protobuf` for CVE-2024-24786
-
-This is a maintenance release.
-
-## 0.26.0 / 2023-12-06
-
-* [CHANGE] Update dependencies: prometheus/common, client model, and Go 1.21
-* [FEATURE] Add option to honor original labels from event tags over labels specified in mapping configuration ([#521](https://github.com/prometheus/statsd_exporter/pull/521))
-
-Thank you @rabenhorst for the `honor_labels` contribution!
-
-## 0.25.0 / 2023-10-23
-
-* [CHANGE] Update `client_golang` ([#508](https://github.com/prometheus/statsd_exporter/pull/508), [#513](https://github.com/prometheus/statsd_exporter/pull/513))
-* [ENHANCEMENT] Process UDP packets asynchronously ([#511](https://github.com/prometheus/statsd_exporter/pull/511))
-* [BUGFIX] Debug-log incoming lines in cleartext ([#510](https://github.com/prometheus/statsd_exporter/pull/510))
-* [SECURITY] Update `golang.org/x/net` ([#516](https://github.com/prometheus/statsd_exporter/pull/516))
-
-This release is less likely to drop UDP packets under very high traffic.
-Additionally, when it does, it now attempts to record that this happened in the metric `statsd_exporter_udp_packet_drops_total`, where previously this could only be detected from operating system metrics.
-If you are already monitoring for OS-level UDP packet drops, you _must_ also monitor this metric.
-The exporter will pull packets from the UDP socket queue much more quickly and queue them internally before processing.
-Existing monitoring for packet drops will no longer be sufficient to detect dropped events, but attribution to the exporter is easier with this new metric.
-
-Many thanks to @sumeshpremraj and @kullanici0606 for their contributions, and @pedro-stanaka for helping with the async UDP processing!
-
-## 0.24.0 / 2023-06-02
-
-* [FEATURE] Improve the landing page experience ([#504](https://github.com/prometheus/statsd_exporter/pull/504))
-* [FEATURE] Support scaling parameter in mapping ([#499](https://github.com/prometheus/statsd_exporter/pull/499))
-
-## 0.23.3 / 2023-06-02
-
-* [SECURITY] Maintenance release, updating dependencies
-* [ENHANCEMENT][library] Allow instantiating configuration without going through YAML ([#491](https://github.com/prometheus/statsd_exporter/pull/491))
-
-Version 0.23.2 was mistagged and thus skipped.
-
-## 0.23.1 / 2023-03-08
-
-* [SECURITY] Update all dependencies ([#489](https://github.com/prometheus/statsd_exporter/pull/489))
-
 ## 0.23.0 / 2022-12-07

 * [CHANGE] Print help and version to standard out ([#469](https://github.com/prometheus/statsd_exporter/pull/469))
--- a/MAINTAINERS.md
+++ b/MAINTAINERS.md
@ -1 +1 @@
-* Matthias Rampke <matthias@prometheus.io>
+* Matthias Rampke <mr@soundcloud.com>
--- a/Makefile.common
+++ b/Makefile.common
@ -49,23 +49,23 @@ endif
 GOTEST := $(GO) test
 GOTEST_DIR :=
 ifneq ($(CIRCLE_JOB),)
-ifneq ($(shell command -v gotestsum 2> /dev/null),)
+ifneq ($(shell which gotestsum),)
 	GOTEST_DIR := test-results
 	GOTEST := gotestsum --junitfile $(GOTEST_DIR)/unit-tests.xml --
 endif
 endif

-PROMU_VERSION ?= 0.15.0
+PROMU_VERSION ?= 0.13.0
 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 ?= v1.56.2
-# golangci-lint only supports linux, darwin and windows platforms on i386/amd64/arm64.
+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 $(GOHOSTARCH),amd64 i386 arm64))
+	ifeq ($(GOHOSTARCH),$(filter $(GOHOSTARCH),amd64 i386))
 		# If we're in CI and there is an Actions file, that means the linter
 		# is being run in Actions, so we don't need to run it here.
 		ifneq (,$(SKIP_GOLANGCI_LINT))
@ -91,8 +91,6 @@ BUILD_DOCKER_ARCHS = $(addprefix common-docker-,$(DOCKER_ARCHS))
 PUBLISH_DOCKER_ARCHS = $(addprefix common-docker-publish-,$(DOCKER_ARCHS))
 TAG_DOCKER_ARCHS = $(addprefix common-docker-tag-latest-,$(DOCKER_ARCHS))

-SANITIZED_DOCKER_IMAGE_TAG := $(subst +,-,$(DOCKER_IMAGE_TAG))
-
 ifeq ($(GOHOSTARCH),amd64)
        ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux freebsd darwin windows))
                # Only supported on amd64
@ -169,20 +167,16 @@ common-vet:
 common-lint: $(GOLANGCI_LINT)
 ifdef GOLANGCI_LINT
 	@echo ">> running golangci-lint"
+# 'go list' needs to be executed before staticcheck to prepopulate the modules cache.
+# Otherwise staticcheck might fail randomly for some reason not yet explained.
+	$(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-lint-fix
-common-lint-fix: $(GOLANGCI_LINT)
-ifdef GOLANGCI_LINT
-	@echo ">> running golangci-lint fix"
-	$(GOLANGCI_LINT) run --fix $(GOLANGCI_LINT_OPTS) $(pkgs)
-endif
-
 .PHONY: common-yamllint
 common-yamllint:
 	@echo ">> running yamllint on all YAML files in the repository"
-ifeq (, $(shell command -v yamllint 2> /dev/null))
+ifeq (, $(shell which yamllint))
 	@echo "yamllint not installed so skipping"
 else
 	yamllint .
@ -208,14 +202,10 @@ common-tarball: promu
 	@echo ">> building release tarball"
 	$(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR)

-.PHONY: common-docker-repo-name
-common-docker-repo-name:
-	@echo "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)"
-
 .PHONY: common-docker $(BUILD_DOCKER_ARCHS)
 common-docker: $(BUILD_DOCKER_ARCHS)
 $(BUILD_DOCKER_ARCHS): common-docker-%:
-	docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" \
+	docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" \
 		-f $(DOCKERFILE_PATH) \
 		--build-arg ARCH="$*" \
 		--build-arg OS="linux" \
@ -224,19 +214,19 @@ $(BUILD_DOCKER_ARCHS): common-docker-%:
 .PHONY: common-docker-publish $(PUBLISH_DOCKER_ARCHS)
 common-docker-publish: $(PUBLISH_DOCKER_ARCHS)
 $(PUBLISH_DOCKER_ARCHS): common-docker-publish-%:
-	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)"
+	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)"

 DOCKER_MAJOR_VERSION_TAG = $(firstword $(subst ., ,$(shell cat VERSION)))
 .PHONY: common-docker-tag-latest $(TAG_DOCKER_ARCHS)
 common-docker-tag-latest: $(TAG_DOCKER_ARCHS)
 $(TAG_DOCKER_ARCHS): common-docker-tag-latest-%:
-	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest"
-	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)"
+	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest"
+	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)"

 .PHONY: common-docker-manifest
 common-docker-manifest:
-	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(SANITIZED_DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(SANITIZED_DOCKER_IMAGE_TAG))
-	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(SANITIZED_DOCKER_IMAGE_TAG)"
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(DOCKER_IMAGE_TAG))
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)"

 .PHONY: promu
 promu: $(PROMU)
--- a/README.md
+++ b/README.md
@ -80,7 +80,7 @@ in the DogStatsD documentation for the concept description and
 If you encounter problems, note that this tagging style is incompatible with
 the original `statsd` implementation.

-For [SignalFX dimension](https://github.com/signalfx/signalfx-agent/blob/main/docs/monitors/collectd-statsd.md#adding-dimensions-to-statsd-metrics), add the tags to the metric name in square brackets, as so:
+For [SignalFX dimension](https://docs.signalfx.com/en/latest/integrations/agent/monitors/collectd-statsd.html#adding-dimensions-to-statsd-metrics), add the tags to the metric name in square brackets, as so:

 ```
 metric.name[tagName=val,tag2Name=val2]:0|c
@ -97,9 +97,6 @@ The exporter parses all tagging formats by default, but individual tagging forma
 --no-statsd.parse-signalfx-tags
 ```

-By default, labels explicitly specified in configuration take precedence over labels from tags.
-To set the label from the statsd event tag, use [`honor_labels`](#honor-labels).
-
 ## Building and Running

 NOTE: Version 0.7.0 switched to the [kingpin](https://github.com/alecthomas/kingpin) flags library. With this change, flag behaviour is POSIX-ish:
@ -108,7 +105,71 @@ NOTE: Version 0.7.0 switched to the [kingpin](https://github.com/alecthomas/king
 * boolean long flags are disabled by prefixing with no (`--flag-name` is true, `--no-flag-name` is false)
 * multiple short flags can be combined (but there currently is only one)
 * flag processing stops at the first `--`
-* see `--help` for a full list of flags
+
+    ```
+    usage: statsd_exporter [<flags>]
+
+    Flags:
+      -h, --help                    Show context-sensitive help (also try
+                                    --help-long and --help-man).
+          --web.listen-address=":9102"
+                                    The address on which to expose the web interface
+                                    and generated Prometheus metrics.
+          --web.enable-lifecycle    Enable shutdown and reload via HTTP request.
+          --web.telemetry-path="/metrics"
+                                    Path under which to expose metrics.
+          --statsd.listen-udp=":9125"
+                                    The UDP address on which to receive statsd
+                                    metric lines. "" disables it.
+          --statsd.listen-tcp=":9125"
+                                    The TCP address on which to receive statsd
+                                    metric lines. "" disables it.
+          --statsd.listen-unixgram=""
+                                    The Unixgram socket path to receive statsd
+                                    metric lines in datagram. "" disables it.
+          --statsd.unixsocket-mode="755"
+                                    The permission mode of the unix socket.
+          --statsd.mapping-config=STATSD.MAPPING-CONFIG
+                                    Metric mapping configuration file name.
+          --statsd.read-buffer=STATSD.READ-BUFFER
+                                    Size (in bytes) of the operating system's
+                                    transmit read buffer associated with the UDP or
+                                    Unixgram connection. Please make sure the kernel
+                                    parameters net.core.rmem_max is set to a value
+                                    greater than the value specified.
+          --statsd.cache-size=1000  Maximum size of your metric mapping cache.
+                                    Relies on least recently used replacement policy
+                                    if max size is reached.
+          --statsd.cache-type=lru   Metric mapping cache type. Valid options are
+                                    "lru" and "random"
+          --statsd.event-queue-size=10000
+                                    Size of internal queue for processing events
+          --statsd.event-flush-threshold=1000
+                                    Number of events to hold in queue before
+                                    flushing
+          --statsd.event-flush-interval=200ms
+                                    Maximum time between event queue flushes.
+          --debug.dump-fsm=""       The path to dump internal FSM generated for
+                                    glob matching as Dot file.
+          --check-config            Check configuration and exit.
+          --statsd.parse-dogstatsd-tags  
+                                    Parse DogStatsd style tags. Enabled by default.
+          --statsd.parse-influxdb-tags  
+                                    Parse InfluxDB style tags. Enabled by default.
+          --statsd.parse-librato-tags  
+                                    Parse Librato style tags. Enabled by default.
+          --statsd.parse-signalfx-tags  
+                                    Parse SignalFX style tags. Enabled by default.
+          --statsd.relay.address=STATSD.RELAY.ADDRESS  
+                                    The UDP relay target address (host:port)
+          --statsd.relay.packet-length=1400  
+                                    Maximum relay output packet length to avoid fragmentation
+          --log.level=info          Only log messages with the given severity or
+                                    above. One of: [debug, info, warn, error]
+          --log.format=logfmt       Output format of log messages. One of: [logfmt,
+                                    json]
+          --version                 Show application version.
+    ```

 ## Lifecycle API

@ -293,13 +354,6 @@ mappings:
    code: "$1"
 ```

-### Honor labels
-
-By default, labels specified in the mapping configuration take precedence over tags in the statsd event.
-
-To set the label value to the original tag value, if present, specify `honor_labels: true` in the mapping configuration.
-In this case, the label specified in the mapping acts as a default.
-
 ### StatsD timers and distributions

 By default, statsd timers and distributions (collectively "observers") are
@ -523,24 +577,7 @@ metrics that do not expire.
 expire a metric only by changing the mapping configuration. At least one
 sample must be received for updated mappings to take effect.

-### Unit conversions
-
-The `scale` parameter can be used to define unit conversions for metric values. The value is a floating point number to scale metric values by. This can be useful for converting non-base units (e.g. milliseconds, kilobytes) to base units (e.g. seconds, bytes) as recommended in [prometheus best practices](https://prometheus.io/docs/practices/naming/).
-
-```yaml
-mappings:
- match: foo.latency_ms
-  name: foo_latency_seconds
-  scale: 0.001
- match: bar.processed_kb
-  name: bar_processed_bytes
-  scale: 1024
- match: baz.latency_us
-  name: baz_latency_seconds
-  scale: 1e-6
-```
-
-### Event flushing configuration
+ ### Event flushing configuration

 Internally `statsd_exporter` runs a goroutine for each network listener (UDP, TCP & Unix Socket).  These each receive and parse metrics received into an event.  For performance purposes, these events are queued internally and flushed to the main exporter goroutine periodically in batches.  The size of this queue and the flush criteria can be tuned with the `--statsd.event-queue-size`, `--statsd.event-flush-threshold` and `--statsd.event-flush-interval`.  However, the defaults should perform well even for very high traffic environments.

@ -569,6 +606,7 @@ Semantic versioning of the exporter is based on the impact on users of the expor

 We encourage re-use of these packages and welcome [issues](https://github.com/prometheus/statsd_exporter/issues?q=is%3Aopen+is%3Aissue+label%3Alibrary) related to their usability as a library.

+[travis]: https://travis-ci.org/prometheus/statsd_exporter
 [circleci]: https://circleci.com/gh/prometheus/statsd_exporter
 [quay]: https://quay.io/repository/prometheus/statsd-exporter
 [hub]: https://hub.docker.com/r/prom/statsd-exporter/
--- a/2
+++ b/2
@ -1 +1 @@
-0.26.1
+0.23.0
--- a/bridge_test.go
+++ b/bridge_test.go
@ -81,58 +81,6 @@ func TestHandlePacket(t *testing.T) {
 					GLabels:     map[string]string{},
 				},
 			},
-		}, {
-			name: "gauge increment",
-			in:   "foo:+10|g",
-			out: event.Events{
-				&event.GaugeEvent{
-					GMetricName: "foo",
-					GValue:      10,
-					GRelative:   true,
-					GLabels:     map[string]string{},
-				},
-			},
-		}, {
-			name: "gauge set negative",
-			in:   "foo:0|g\nfoo:-1|g",
-			out: event.Events{
-				&event.GaugeEvent{
-					GMetricName: "foo",
-					GValue:      0,
-					GRelative:   false,
-					GLabels:     map[string]string{},
-				},
-				&event.GaugeEvent{
-					GMetricName: "foo",
-					GValue:      -1,
-					GRelative:   true,
-					GLabels:     map[string]string{},
-				},
-			},
-		}, {
-			// Test the sequence given here https://github.com/statsd/statsd/blob/master/docs/metric_types.md#gauges
-			name: "gauge up and down",
-			in:   "gaugor:333|g\ngaugor:-10|g\ngaugor:+4|g",
-			out: event.Events{
-				&event.GaugeEvent{
-					GMetricName: "gaugor",
-					GValue:      333,
-					GRelative:   false,
-					GLabels:     map[string]string{},
-				},
-				&event.GaugeEvent{
-					GMetricName: "gaugor",
-					GValue:      -10,
-					GRelative:   true,
-					GLabels:     map[string]string{},
-				},
-				&event.GaugeEvent{
-					GMetricName: "gaugor",
-					GValue:      4,
-					GRelative:   true,
-					GLabels:     map[string]string{},
-				},
-			},
 		}, {
 			name: "simple timer",
 			in:   "foo:200|ms",
@ -595,7 +543,6 @@ func TestHandlePacket(t *testing.T) {
 		Logger:          log.NewNopLogger(),
 		LineParser:      parser,
 		UDPPackets:      udpPackets,
-		UDPPacketDrops:  udpPacketDrops,
 		LinesReceived:   linesReceived,
 		EventsFlushed:   eventsFlushed,
 		SampleErrors:    *sampleErrors,
--- a/exporter_benchmark_test.go
+++ b/exporter_benchmark_test.go
@ -65,7 +65,6 @@ func benchmarkUDPListener(times int, b *testing.B) {

 		// there are more events than input lines, need bigger buffer
 		events := make(chan event.Events, len(bytesInput)*times*2)
-		udpChan := make(chan []byte, len(bytesInput)*times*2)

 		l := listener.StatsDUDPListener{
 			EventHandler:    &event.UnbufferedEventHandler{C: events},
@ -75,7 +74,6 @@ func benchmarkUDPListener(times int, b *testing.B) {
 			LinesReceived:   linesReceived,
 			SamplesReceived: samplesReceived,
 			TagsReceived:    tagsReceived,
-			UdpPacketQueue:  udpChan,
 		}

 		// resume benchmark timer
--- a/go.mod
+++ b/go.mod
@ -1,36 +1,27 @@
 module github.com/prometheus/statsd_exporter

-go 1.20
+go 1.18

 require (
-	github.com/alecthomas/kingpin/v2 v2.4.0
 	github.com/go-kit/log v0.2.1
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da
-	github.com/prometheus/client_golang v1.19.0
-	github.com/prometheus/client_model v0.6.0
-	github.com/prometheus/common v0.48.0
-	github.com/prometheus/exporter-toolkit v0.11.0
+	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
 )

 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 v2.2.0 // indirect
-	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
-	github.com/go-logfmt/logfmt v0.6.0 // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/jpillora/backoff v1.0.0 // indirect
-	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
-	github.com/prometheus/procfs v0.12.0 // indirect
-	github.com/xhit/go-str2duration/v2 v2.1.0 // indirect
-	golang.org/x/crypto v0.18.0 // indirect
-	golang.org/x/net v0.20.0 // indirect
-	golang.org/x/oauth2 v0.16.0 // indirect
-	golang.org/x/sync v0.5.0 // indirect
-	golang.org/x/sys v0.16.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/protobuf v1.33.0 // 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
 )
--- a/go.sum
+++ b/go.sum
@ -1,82 +1,495 @@
-github.com/alecthomas/kingpin/v2 v2.4.0 h1:f48lwail6p8zpO1bC4TxtqACaGqHYA22qkHjHpqDjYY=
-github.com/alecthomas/kingpin/v2 v2.4.0/go.mod h1:0gyi0zQnjuFk8xrkNKamJoyUo382HRL7ATRpFZCw6tE=
+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=
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+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=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM=
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 github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137/go.mod h1:OMCwj8VM1Kc9e19TLln2VL61YJF0x1XFtfdL4JdbSyE=
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-github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
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-github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
-github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
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 github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
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 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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 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 v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
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 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+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=
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+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/main.go
+++ b/main.go
@ -24,7 +24,6 @@ import (
 	"strconv"
 	"syscall"

-	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
@ -32,7 +31,7 @@ import (
 	"github.com/prometheus/common/promlog"
 	"github.com/prometheus/common/promlog/flag"
 	"github.com/prometheus/common/version"
-	"github.com/prometheus/exporter-toolkit/web"
+	"gopkg.in/alecthomas/kingpin.v2"

 	"github.com/prometheus/statsd_exporter/pkg/address"
 	"github.com/prometheus/statsd_exporter/pkg/event"
@ -71,12 +70,6 @@ var (
 			Help: "The total number of StatsD packets received over UDP.",
 		},
 	)
-	udpPacketDrops = promauto.NewCounter(
-		prometheus.CounterOpts{
-			Name: "statsd_exporter_udp_packet_drops_total",
-			Help: "The total number of dropped StatsD packets which received over UDP.",
-		},
-	)
 	tcpConnections = promauto.NewCounter(
 		prometheus.CounterOpts{
 			Name: "statsd_exporter_tcp_connections_total",
@ -267,7 +260,6 @@ func main() {
 		signalFXTagsEnabled  = kingpin.Flag("statsd.parse-signalfx-tags", "Parse SignalFX style tags. Enabled by default.").Default("true").Bool()
 		relayAddr            = kingpin.Flag("statsd.relay.address", "The UDP relay target address (host:port)").String()
 		relayPacketLen       = kingpin.Flag("statsd.relay.packet-length", "Maximum relay output packet length to avoid fragmentation").Default("1400").Uint()
-		udpPacketQueueSize   = kingpin.Flag("statsd.udp-packet-queue-size", "Size of internal queue for processing UDP packets.").Default("10000").Int()
 	)

 	promlogConfig := &promlog.Config{}
@ -375,15 +367,12 @@ func main() {
 			}
 		}

-		udpPacketQueue := make(chan []byte, *udpPacketQueueSize)
-
 		ul := &listener.StatsDUDPListener{
 			Conn:            uconn,
 			EventHandler:    eventQueue,
 			Logger:          logger,
 			LineParser:      parser,
 			UDPPackets:      udpPackets,
-			UDPPacketDrops:  udpPacketDrops,
 			LinesReceived:   linesReceived,
 			EventsFlushed:   eventsFlushed,
 			Relay:           relayTarget,
@ -391,7 +380,6 @@ func main() {
 			SamplesReceived: samplesReceived,
 			TagErrors:       tagErrors,
 			TagsReceived:    tagsReceived,
-			UdpPacketQueue:  udpPacketQueue,
 		}

 		go ul.Listen()
@ -492,25 +480,15 @@ func main() {

 	mux := http.DefaultServeMux
 	mux.Handle(*metricsEndpoint, promhttp.Handler())
-	if *metricsEndpoint != "/" && *metricsEndpoint != "" {
-		landingConfig := web.LandingConfig{
-			Name:        "StatsD Exporter",
-			Description: "Prometheus Exporter for converting StatsD to Prometheus metrics",
-			Version:     version.Info(),
-			Links: []web.LandingLinks{
-				{
-					Address: *metricsEndpoint,
-					Text:    "Metrics",
-				},
-			},
-		}
-		landingPage, err := web.NewLandingPage(landingConfig)
-		if err != nil {
-			level.Error(logger).Log("err", err)
-			os.Exit(1)
-		}
-		mux.Handle("/", landingPage)
-	}
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte(`<html>
+			<head><title>StatsD Exporter</title></head>
+			<body>
+			<h1>StatsD Exporter</h1>
+			<p><a href="` + *metricsEndpoint + `">Metrics</a></p>
+			</body>
+			</html>`))
+	})

 	quitChan := make(chan struct{}, 1)

--- a/pkg/exporter/exporter.go
+++ b/pkg/exporter/exporter.go
@ -105,10 +105,6 @@ func (b *Exporter) handleEvent(thisEvent event.Event) {
 		}
 		metricName = mapper.EscapeMetricName(mapping.Name)
 		for label, value := range labels {
-			if _, ok := prometheusLabels[label]; mapping.HonorLabels && ok {
-				continue
-			}
-
 			prometheusLabels[label] = value
 		}
 		b.EventsActions.WithLabelValues(string(mapping.Action)).Inc()
@ -117,24 +113,19 @@ func (b *Exporter) handleEvent(thisEvent event.Event) {
 		metricName = mapper.EscapeMetricName(thisEvent.MetricName())
 	}

-	eventValue := thisEvent.Value()
-	if mapping.Scale.Set {
-		eventValue *= mapping.Scale.Val
-	}
-
 	switch ev := thisEvent.(type) {
 	case *event.CounterEvent:
 		// We don't accept negative values for counters. Incrementing the counter with a negative number
 		// will cause the exporter to panic. Instead we will warn and continue to the next event.
-		if eventValue < 0.0 {
-			level.Debug(b.Logger).Log("msg", "counter must be non-negative value", "metric", metricName, "event_value", eventValue)
+		if thisEvent.Value() < 0.0 {
+			level.Debug(b.Logger).Log("msg", "counter must be non-negative value", "metric", metricName, "event_value", thisEvent.Value())
 			b.ErrorEventStats.WithLabelValues("illegal_negative_counter").Inc()
 			return
 		}

 		counter, err := b.Registry.GetCounter(metricName, prometheusLabels, help, mapping, b.MetricsCount)
 		if err == nil {
-			counter.Add(eventValue)
+			counter.Add(thisEvent.Value())
 			b.EventStats.WithLabelValues("counter").Inc()
 		} else {
 			level.Debug(b.Logger).Log("msg", regErrF, "metric", metricName, "error", err)
@ -146,9 +137,9 @@ func (b *Exporter) handleEvent(thisEvent event.Event) {

 		if err == nil {
 			if ev.GRelative {
-				gauge.Add(eventValue)
+				gauge.Add(thisEvent.Value())
 			} else {
-				gauge.Set(eventValue)
+				gauge.Set(thisEvent.Value())
 			}
 			b.EventStats.WithLabelValues("gauge").Inc()
 		} else {
@ -169,7 +160,7 @@ func (b *Exporter) handleEvent(thisEvent event.Event) {
 		case mapper.ObserverTypeHistogram:
 			histogram, err := b.Registry.GetHistogram(metricName, prometheusLabels, help, mapping, b.MetricsCount)
 			if err == nil {
-				histogram.Observe(eventValue)
+				histogram.Observe(thisEvent.Value())
 				b.EventStats.WithLabelValues("observer").Inc()
 			} else {
 				level.Debug(b.Logger).Log("msg", regErrF, "metric", metricName, "error", err)
@ -179,7 +170,7 @@ func (b *Exporter) handleEvent(thisEvent event.Event) {
 		case mapper.ObserverTypeDefault, mapper.ObserverTypeSummary:
 			summary, err := b.Registry.GetSummary(metricName, prometheusLabels, help, mapping, b.MetricsCount)
 			if err == nil {
-				summary.Observe(eventValue)
+				summary.Observe(thisEvent.Value())
 				b.EventStats.WithLabelValues("observer").Inc()
 			} else {
 				level.Debug(b.Logger).Log("msg", regErrF, "metric", metricName, "error", err)
--- a/pkg/exporter/exporter_test.go
+++ b/pkg/exporter/exporter_test.go
@ -56,12 +56,6 @@ var (
 			Help: "The total number of StatsD packets received over UDP.",
 		},
 	)
-	udpPacketDrops = prometheus.NewCounter(
-		prometheus.CounterOpts{
-			Name: "statsd_exporter_udp_packet_drops_total",
-			Help: "The total number of dropped StatsD packets which received over UDP.",
-		},
-	)
 	tcpConnections = prometheus.NewCounter(
 		prometheus.CounterOpts{
 			Name: "statsd_exporter_tcp_connections_total",
@ -277,7 +271,7 @@ mappings:
 // TestLabelParsing verifies that labels getting parsed out of metric
 // names are being properly created.
 func TestLabelParsing(t *testing.T) {
-	codes := [3]string{"200", "300", "400"}
+	codes := [2]string{"200", "300"}

 	events := make(chan event.Events)
 	go func() {
@ -292,11 +286,6 @@ func TestLabelParsing(t *testing.T) {
 				CValue:      1,
 				CLabels:     make(map[string]string),
 			},
-			&event.CounterEvent{
-				CMetricName: "counter.test.400",
-				CValue:      1,
-				CLabels:     map[string]string{"code": "should be overwritten"},
-			},
 		}
 		events <- c
 		close(events)
@ -334,51 +323,6 @@ mappings:
 	}
 }

-func TestHonorLabels(t *testing.T) {
-	metricName := "some_counter"
-	events := make(chan event.Events)
-	go func() {
-		c := event.Events{
-			&event.CounterEvent{
-				CMetricName: metricName,
-				CValue:      1,
-				CLabels:     map[string]string{"some_label": "bar"},
-			},
-		}
-		events <- c
-		close(events)
-	}()
-
-	config := `
-mappings:
-  - match: .*
-    match_type: regex
-    name: $0
-    labels:
-      some_label: foo
-    honor_labels: true
-`
-	testMapper := &mapper.MetricMapper{
-		Logger: log.NewNopLogger(),
-	}
-	err := testMapper.InitFromYAMLString(config)
-	if err != nil {
-		t.Fatalf("Config load error: %s %s", config, err)
-	}
-
-	ex := NewExporter(prometheus.DefaultRegisterer, testMapper, log.NewNopLogger(), eventsActions, eventsUnmapped, errorEventStats, eventStats, conflictingEventStats, metricsCount)
-	ex.Listen(events)
-
-	metrics, err := prometheus.DefaultGatherer.Gather()
-	if err != nil {
-		t.Fatalf("Cannot gather from DefaultGatherer: %v", err)
-	}
-
-	if getFloat64(metrics, metricName, map[string]string{"some_label": "bar"}) == nil {
-		t.Fatalf("Could not find metrics for %s with label set", metricName)
-	}
-}
-
 // TestConflictingMetrics validates that the exporter will not register metrics
 // of different types that have overlapping names.
 func TestConflictingMetrics(t *testing.T) {
@ -739,7 +683,6 @@ func TestInvalidUtf8InDatadogTagValue(t *testing.T) {
 			Logger:          log.NewNopLogger(),
 			LineParser:      parser,
 			UDPPackets:      udpPackets,
-			UDPPacketDrops:  udpPacketDrops,
 			LinesReceived:   linesReceived,
 			EventsFlushed:   eventsFlushed,
 			SampleErrors:    *sampleErrors,
@ -902,115 +845,6 @@ func TestCounterIncrement(t *testing.T) {
 	}
 }

-// Test case from https://github.com/statsd/statsd/blob/master/docs/metric_types.md#gauges
-func TestGaugeIncrementDecrement(t *testing.T) {
-	// Start exporter with a synchronous channel
-	events := make(chan event.Events)
-	go func() {
-		testMapper := mapper.MetricMapper{}
-		ex := NewExporter(prometheus.DefaultRegisterer, &testMapper, log.NewNopLogger(), eventsActions, eventsUnmapped, errorEventStats, eventStats, conflictingEventStats, metricsCount)
-		ex.Listen(events)
-	}()
-
-	// Synchronously send a statsd event to wait for handleEvent execution.
-	// Then close events channel to stop a listener.
-	name := "gaugor"
-	c := event.Events{
-		&event.GaugeEvent{
-			GMetricName: "gaugor",
-			GValue:      333,
-			GRelative:   false,
-			GLabels:     map[string]string{},
-		},
-		&event.GaugeEvent{
-			GMetricName: "gaugor",
-			GValue:      -10,
-			GRelative:   true,
-			GLabels:     map[string]string{},
-		},
-		&event.GaugeEvent{
-			GMetricName: "gaugor",
-			GValue:      4,
-			GRelative:   true,
-			GLabels:     map[string]string{},
-		},
-	}
-	events <- c
-	// Push empty event so that we block until the first event is consumed.
-	events <- event.Events{}
-	close(events)
-
-	// Check histogram value
-	metrics, err := prometheus.DefaultGatherer.Gather()
-	if err != nil {
-		t.Fatalf("Cannot gather from DefaultGatherer: %v", err)
-	}
-	value := getFloat64(metrics, name, nil)
-	if value == nil {
-		t.Fatal("gauge value should not be nil")
-	}
-	if *value != 327 {
-		t.Fatalf("gauge wasn't incremented and decremented properly")
-	}
-}
-
-func TestScaledMapping(t *testing.T) {
-	events := make(chan event.Events)
-	testMapper := mapper.MetricMapper{}
-	config := `mappings:
- match: foo.processed_kilobytes
-  name: processed_bytes
-  scale: 1024
-  labels:
-    service: foo`
-	err := testMapper.InitFromYAMLString(config)
-	if err != nil {
-		t.Fatalf("Config load error: %s %s", config, err)
-	}
-
-	// Start exporter with a synchronous channel
-	go func() {
-		ex := NewExporter(prometheus.DefaultRegisterer, &testMapper, log.NewNopLogger(), eventsActions, eventsUnmapped, errorEventStats, eventStats, conflictingEventStats, metricsCount)
-		ex.Listen(events)
-	}()
-
-	// Synchronously send a statsd event to wait for handleEvent execution.
-	// Then close events channel to stop a listener.
-	statsdName := "foo.processed_kilobytes"
-	statsdLabels := map[string]string{}
-	promName := "processed_bytes"
-	promLabels := map[string]string{"service": "foo"}
-	c := event.Events{
-		&event.CounterEvent{
-			CMetricName: statsdName,
-			CValue:      100,
-			CLabels:     statsdLabels,
-		},
-		&event.CounterEvent{
-			CMetricName: statsdName,
-			CValue:      200,
-			CLabels:     statsdLabels,
-		},
-	}
-	events <- c
-	// Push empty event so that we block until the first event is consumed.
-	events <- event.Events{}
-	close(events)
-
-	// Check counter value
-	metrics, err := prometheus.DefaultGatherer.Gather()
-	if err != nil {
-		t.Fatalf("Cannot gather from DefaultGatherer: %v", err)
-	}
-	value := getFloat64(metrics, promName, promLabels)
-	if value == nil {
-		t.Fatal("Counter value should not be nil")
-	}
-	if *value != 300*1024 {
-		t.Fatalf("Counter wasn't incremented properly")
-	}
-}
-
 type statsDPacketHandler interface {
 	HandlePacket(packet []byte)
 	SetEventHandler(eh event.EventHandler)
--- a/pkg/listener/listener.go
+++ b/pkg/listener/listener.go
@ -38,7 +38,6 @@ type StatsDUDPListener struct {
 	Logger          log.Logger
 	LineParser      Parser
 	UDPPackets      prometheus.Counter
-	UDPPacketDrops  prometheus.Counter
 	LinesReceived   prometheus.Counter
 	EventsFlushed   prometheus.Counter
 	Relay           *relay.Relay
@ -46,7 +45,6 @@ type StatsDUDPListener struct {
 	SamplesReceived prometheus.Counter
 	TagErrors       prometheus.Counter
 	TagsReceived    prometheus.Counter
-	UdpPacketQueue  chan []byte
 }

 func (l *StatsDUDPListener) SetEventHandler(eh event.EventHandler) {
@ -55,7 +53,6 @@ func (l *StatsDUDPListener) SetEventHandler(eh event.EventHandler) {

 func (l *StatsDUDPListener) Listen() {
 	buf := make([]byte, 65535)
-	go l.ProcessUdpPacketQueue()
 	for {
 		n, _, err := l.Conn.ReadFromUDP(buf)
 		if err != nil {
@ -67,31 +64,12 @@ func (l *StatsDUDPListener) Listen() {
 			level.Error(l.Logger).Log("error", err)
 			return
 		}
-
-		l.EnqueueUdpPacket(buf, n)
-	}
-}
-
-func (l *StatsDUDPListener) EnqueueUdpPacket(packet []byte, n int) {
-	l.UDPPackets.Inc()
-	packetCopy := make([]byte, n)
-	copy(packetCopy, packet)
-	select {
-	case l.UdpPacketQueue <- packetCopy:
-		// do nothing
-	default:
-		l.UDPPacketDrops.Inc()
-	}
-}
-
-func (l *StatsDUDPListener) ProcessUdpPacketQueue() {
-	for {
-		packet := <-l.UdpPacketQueue
-		l.HandlePacket(packet)
+		l.HandlePacket(buf[0:n])
 	}
 }

 func (l *StatsDUDPListener) HandlePacket(packet []byte) {
+	l.UDPPackets.Inc()
 	lines := strings.Split(string(packet), "\n")
 	for _, line := range lines {
 		level.Debug(l.Logger).Log("msg", "Incoming line", "proto", "udp", "line", line)
@ -155,7 +133,7 @@ func (l *StatsDTCPListener) HandleConn(c *net.TCPConn) {
 			}
 			break
 		}
-		level.Debug(l.Logger).Log("msg", "Incoming line", "proto", "tcp", "line", string(line))
+		level.Debug(l.Logger).Log("msg", "Incoming line", "proto", "tcp", "line", line)
 		if isPrefix {
 			l.TCPLineTooLong.Inc()
 			level.Debug(l.Logger).Log("msg", "Read failed: line too long", "addr", c.RemoteAddr())
--- a/pkg/mapper/mapper.go
+++ b/pkg/mapper/mapper.go
@ -43,7 +43,7 @@ var (

 type MetricMapper struct {
 	Registerer prometheus.Registerer
-	Defaults   MapperConfigDefaults `yaml:"defaults"`
+	Defaults   mapperConfigDefaults `yaml:"defaults"`
 	Mappings   []MetricMapping      `yaml:"mappings"`
 	FSM        *fsm.FSM
 	doFSM      bool
@ -57,7 +57,7 @@ type MetricMapper struct {
 }

 type SummaryOptions struct {
-	Quantiles  []MetricObjective `yaml:"quantiles"`
+	Quantiles  []metricObjective `yaml:"quantiles"`
 	MaxAge     time.Duration     `yaml:"max_age"`
 	AgeBuckets uint32            `yaml:"age_buckets"`
 	BufCap     uint32            `yaml:"buf_cap"`
@ -69,12 +69,12 @@ type HistogramOptions struct {
 	NativeHistogramMaxBuckets   uint32    `yaml:"native_histogram_max_buckets"`
 }

-type MetricObjective struct {
+type metricObjective struct {
 	Quantile float64 `yaml:"quantile"`
 	Error    float64 `yaml:"error"`
 }

-var defaultQuantiles = []MetricObjective{
+var defaultQuantiles = []metricObjective{
 	{Quantile: 0.5, Error: 0.05},
 	{Quantile: 0.9, Error: 0.01},
 	{Quantile: 0.99, Error: 0.001},
--- a/pkg/mapper/mapper_defaults.go
+++ b/pkg/mapper/mapper_defaults.go
@ -15,7 +15,7 @@ package mapper

 import "time"

-type MapperConfigDefaults struct {
+type mapperConfigDefaults struct {
 	ObserverType        ObserverType     `yaml:"observer_type"`
 	MatchType           MatchType        `yaml:"match_type"`
 	GlobDisableOrdering bool             `yaml:"glob_disable_ordering"`
@ -29,7 +29,7 @@ type mapperConfigDefaultsAlias struct {
 	ObserverType        ObserverType      `yaml:"observer_type"`
 	TimerType           ObserverType      `yaml:"timer_type,omitempty"` // DEPRECATED - field only present to preserve backwards compatibility in configs
 	Buckets             []float64         `yaml:"buckets"`              // DEPRECATED - field only present to preserve backwards compatibility in configs
-	Quantiles           []MetricObjective `yaml:"quantiles"`            // DEPRECATED - field only present to preserve backwards compatibility in configs
+	Quantiles           []metricObjective `yaml:"quantiles"`            // DEPRECATED - field only present to preserve backwards compatibility in configs
 	MatchType           MatchType         `yaml:"match_type"`
 	GlobDisableOrdering bool              `yaml:"glob_disable_ordering"`
 	Ttl                 time.Duration     `yaml:"ttl"`
@ -39,7 +39,7 @@ type mapperConfigDefaultsAlias struct {

 // UnmarshalYAML is a custom unmarshal function to allow use of deprecated config keys
 // observer_type will override timer_type
-func (d *MapperConfigDefaults) UnmarshalYAML(unmarshal func(interface{}) error) error {
+func (d *mapperConfigDefaults) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	var tmp mapperConfigDefaultsAlias
 	if err := unmarshal(&tmp); err != nil {
 		return err
--- a/pkg/mapper/mapper_test.go
+++ b/pkg/mapper/mapper_test.go
@ -27,7 +27,7 @@ type mappings []struct {
 	statsdMetric string
 	name         string
 	labels       map[string]string
-	quantiles    []MetricObjective
+	quantiles    []metricObjective
 	notPresent   bool
 	ttl          time.Duration
 	metricType   MetricType
@ -35,7 +35,6 @@ type mappings []struct {
 	ageBuckets   uint32
 	bufCap       uint32
 	buckets      []float64
-	scale        MaybeFloat64
 }

 func newTestMapperWithCache(cacheType string, size int) *MetricMapper {
@ -571,7 +570,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -598,7 +597,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -619,7 +618,7 @@ mappings:
 					statsdMetric: "test1.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.5, Error: 0.05},
 						{Quantile: 0.9, Error: 0.01},
 						{Quantile: 0.99, Error: 0.001},
@ -641,7 +640,7 @@ mappings:
 					statsdMetric: "test1.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.5, Error: 0.05},
 						{Quantile: 0.9, Error: 0.01},
 						{Quantile: 0.99, Error: 0.001},
@ -691,7 +690,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -721,7 +720,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -755,7 +754,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -820,7 +819,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -863,7 +862,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -910,7 +909,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -922,7 +921,7 @@ mappings:
 					statsdMetric: "test_default.*.*",
 					name:         "foo_default",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.9, Error: 0.1},
 						{Quantile: 0.99, Error: 0.01},
 					},
@ -966,7 +965,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.42, Error: 0.04},
 						{Quantile: 0.7, Error: 0.002},
 					},
@ -978,7 +977,7 @@ mappings:
 					statsdMetric: "test_default.*.*",
 					name:         "foo_default",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.9, Error: 0.1},
 						{Quantile: 0.99, Error: 0.01},
 					},
@ -1018,7 +1017,7 @@ mappings:
 					statsdMetric: "test.*.*",
 					name:         "foo",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.9, Error: 0.1},
 						{Quantile: 0.99, Error: 0.01},
 					},
@ -1030,7 +1029,7 @@ mappings:
 					statsdMetric: "test_default.*.*",
 					name:         "foo_default",
 					labels:       map[string]string{},
-					quantiles: []MetricObjective{
+					quantiles: []metricObjective{
 						{Quantile: 0.9, Error: 0.1},
 						{Quantile: 0.99, Error: 0.01},
 					},
@ -1481,54 +1480,6 @@ mappings:
 				},
 			},
 		},
-		{
-			testName: "Config with 'scale' field",
-			config: `mappings:
- match: grpc_server.*.*.latency_ms
-  name: grpc_server_handling_seconds
-  scale: 0.001
-  labels:
-    grpc_service: "$1"
-    grpc_method: "$2"`,
-			mappings: mappings{
-				{
-					statsdMetric: "test.a",
-				},
-				{
-					statsdMetric: "grpc_server.Foo.Bar.latency_ms",
-					name:         "grpc_server_handling_seconds",
-					scale:        MaybeFloat64{Val: 0.001, Set: true},
-					labels: map[string]string{
-						"grpc_service": "Foo",
-						"grpc_method":  "Bar",
-					},
-				},
-			},
-		},
-		{
-			testName: "Config with 'scale' using scientific notation",
-			config: `mappings:
- match: grpc_server.*.*.latency_us
-  name: grpc_server_handling_seconds
-  scale: 1e-6
-  labels:
-    grpc_service: "$1"
-    grpc_method: "$2"`,
-			mappings: mappings{
-				{
-					statsdMetric: "test.a",
-				},
-				{
-					statsdMetric: "grpc_server.Foo.Bar.latency_us",
-					name:         "grpc_server_handling_seconds",
-					scale:        MaybeFloat64{Val: 1e-6, Set: true},
-					labels: map[string]string{
-						"grpc_service": "Foo",
-						"grpc_method":  "Bar",
-					},
-				},
-			},
-		},
 	}

 	mapper := MetricMapper{}
@ -1610,9 +1561,6 @@ mappings:
 				if mapping.bufCap != 0 && mapping.bufCap != m.SummaryOptions.BufCap {
 					t.Fatalf("%d.%q: Expected max age %v, got %v", i, metric, mapping.bufCap, m.SummaryOptions.BufCap)
 				}
-				if present && mapping.scale != m.Scale {
-					t.Fatalf("%d.%q: Expected scale %v, got %v", i, metric, mapping.scale, m.Scale)
-				}
 			}
 		})
 	}
--- a/pkg/mapper/mapping.go
+++ b/pkg/mapper/mapping.go
@ -28,13 +28,12 @@ type MetricMapping struct {
 	nameFormatter    *fsm.TemplateFormatter
 	regex            *regexp.Regexp
 	Labels           prometheus.Labels `yaml:"labels"`
-	HonorLabels      bool              `yaml:"honor_labels"`
 	labelKeys        []string
 	labelFormatters  []*fsm.TemplateFormatter
 	ObserverType     ObserverType      `yaml:"observer_type"`
 	TimerType        ObserverType      `yaml:"timer_type,omitempty"` // DEPRECATED - field only present to preserve backwards compatibility in configs. Always empty
 	LegacyBuckets    []float64         `yaml:"buckets"`
-	LegacyQuantiles  []MetricObjective `yaml:"quantiles"`
+	LegacyQuantiles  []metricObjective `yaml:"quantiles"`
 	MatchType        MatchType         `yaml:"match_type"`
 	HelpText         string            `yaml:"help"`
 	Action           ActionType        `yaml:"action"`
@ -42,7 +41,6 @@ type MetricMapping struct {
 	Ttl              time.Duration     `yaml:"ttl"`
 	SummaryOptions   *SummaryOptions   `yaml:"summary_options"`
 	HistogramOptions *HistogramOptions `yaml:"histogram_options"`
-	Scale            MaybeFloat64      `yaml:"scale"`
 }

 // UnmarshalYAML is a custom unmarshal function to allow use of deprecated config keys
@ -58,7 +56,6 @@ func (m *MetricMapping) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	m.Match = tmp.Match
 	m.Name = tmp.Name
 	m.Labels = tmp.Labels
-	m.HonorLabels = tmp.HonorLabels
 	m.ObserverType = tmp.ObserverType
 	m.LegacyBuckets = tmp.LegacyBuckets
 	m.LegacyQuantiles = tmp.LegacyQuantiles
@ -69,7 +66,6 @@ func (m *MetricMapping) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	m.Ttl = tmp.Ttl
 	m.SummaryOptions = tmp.SummaryOptions
 	m.HistogramOptions = tmp.HistogramOptions
-	m.Scale = tmp.Scale

 	// Use deprecated TimerType if necessary
 	if tmp.ObserverType == "" {
@ -78,25 +74,3 @@ func (m *MetricMapping) UnmarshalYAML(unmarshal func(interface{}) error) error {

 	return nil
 }
-
-type MaybeFloat64 struct {
-	Set bool
-	Val float64
-}
-
-func (m *MaybeFloat64) MarshalYAML() (interface{}, error) {
-	if m.Set {
-		return m.Val, nil
-	}
-	return nil, nil
-}
-
-func (m *MaybeFloat64) UnmarshalYAML(unmarshal func(interface{}) error) error {
-	var tmp float64
-	if err := unmarshal(&tmp); err != nil {
-		return err
-	}
-	m.Val = tmp
-	m.Set = true
-	return nil
-}
--- a/pkg/relay/relay.go
+++ b/pkg/relay/relay.go
@ -127,7 +127,7 @@ func (r *Relay) relayOutput() {
 				buffer.Reset()
 				buffer.Write(b)
 			} else {
-				level.Debug(r.logger).Log("msg", "Adding line to buffer", "line", string(b))
+				level.Debug(r.logger).Log("msg", "Adding line to buffer", "line", b)
 				buffer.Write(b)
 			}
 		}
@ -140,7 +140,7 @@ func (r *Relay) sendPacket(buf []byte) error {
 		level.Debug(r.logger).Log("msg", "Empty buffer, nothing to send")
 		return nil
 	}
-	level.Debug(r.logger).Log("msg", "Sending packet", "length", len(buf), "data", string(buf))
+	level.Debug(r.logger).Log("msg", "Sending packet", "length", len(buf), "data", buf)
 	_, err := r.conn.WriteToUDP(buf, r.addr)
 	r.packetsTotal.Inc()
 	return err
@ -158,7 +158,7 @@ func (r *Relay) RelayLine(l string) {
 		r.longLinesTotal.Inc()
 		return
 	}
-	level.Debug(r.logger).Log("msg", "Relaying line", "line", string(l))
+	level.Debug(r.logger).Log("msg", "Relaying line", "line", l)
 	if !strings.HasSuffix(l, "\n") {
 		l = l + "\n"
 	}
 @ -1 +1 @@
 .26.1
 .23.0