feat: Add missed blocks metric

.github/workflows/pr-validation.yaml

@@ -0,0 +1,34 @@
+---
+name: PR Validation
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  run-reviewdog:
+    name: Run ReviewDog
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: ReviewDog - GolangCI Lint
+        uses: reviewdog/action-golangci-lint@v2
+        with:
+          go_version_file: go.mod
+          tool_name: GolangCI Lint
+          golangci_lint_flags: --config=.golangci.yaml --timeout=10m
+          fail_on_error: true
+  run-tests:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - name: Tests
+        run: make test-ci

.github/workflows/release.yaml

@@ -0,0 +1,44 @@
+---
+name: Release
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+      - id: release-please
+        name: Release Please
+        uses: google-github-actions/release-please-action@v4
+        with:
+          release-type: go
+
+      - name: Checkout
+        uses: actions/checkout@v4
+        if: steps.release-please.outputs.release_created
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        if: steps.release-please.outputs.release_created
+        with:
+          go-version-file: go.mod
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+        if: steps.release-please.outputs.release_created
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        if: steps.release-please.outputs.release_created
+
+      - name: Run GoReleaser
+        if: steps.release-please.outputs.release_created
+        run: make release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -1,13 +1,16 @@
-# If you prefer the allow list template instead of the deny list, see community template:
-# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
-#
 # Binaries for programs and plugins
 *.exe
 *.exe~
 *.dll
 *.so
 *.dylib
 
+# vscode
+.vscode
+
+# direnv
+.envrc
+
 # Test binary, built with `go test -c`
 *.test
 
@@ -19,3 +22,6 @@
 
 # Go workspace file
 go.work
+
+/dist
+/build

.golangci.yaml

@@ -0,0 +1,54 @@
+---
+output:
+  sort-results: true
+
+linters:
+  enable:
+    - depguard
+    - gocritic
+    - gofumpt
+    - goimports
+    - revive
+    - misspell
+    - unconvert
+    - unused
+    - wsl
+
+issues:
+  max-same-issues: 0
+  exclude-rules:
+    - linters:
+        - gocritic
+      text: "appendAssign"
+    - path: _test.go
+      linters:
+        - errcheck
+
+linters-settings:
+  depguard:
+    rules:
+      main:
+        files:
+          - $all
+        deny:
+          - pkg: "github.com/sirupsen/logrus"
+            desc: Not allowed
+          - pkg: "github.com/pkg/errors"
+            desc: Should be replaced by standard lib errors package
+          - pkg: "sync/atomic"
+            desc: Use go.uber.org/atomic instead of sync/atomic
+          - pkg: "io/ioutil"
+            desc: Use corresponding 'os' or 'io' functions instead.
+  errcheck:
+    exclude-functions:
+      # Don't flag lines such as "io.Copy(io.Discard, resp.Body)".
+      - io.Copy
+      # The next two are used in HTTP handlers, any error is handled by the server itself.
+      - io.WriteString
+      - (net/http.ResponseWriter).Write
+      # No need to check for errors on server's shutdown.
+      - (*net/http.Server).Shutdown
+  goimports:
+    local-prefixes: github.com/prometheus/prometheus
+  gofumpt:
+    extra-rules: true

.goreleaser.yaml

@@ -0,0 +1,57 @@
+---
+project_name: validator-exporter
+before:
+  hooks:
+    - go mod tidy
+env:
+  - CGO_ENABLED=0
+builds:
+  - main: "./cmd/{{ .ProjectName }}/main.go"
+    binary: "{{ .ProjectName }}"
+    goos:
+      - linux
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+    flags:
+      - -mod=readonly
+      - -trimpath
+    ldflags:
+      - -s -w
+    tags:
+      - netgo
+
+universal_binaries:
+  - replace: false
+
+dockers:
+  - use: buildx
+    goos: linux
+    goarch: amd64
+    image_templates:
+      - "ghcr.io/archway-network/{{ .ProjectName }}:{{ .Version }}-amd64"
+    build_flag_templates:
+      - "--pull"
+      - "--platform=linux/amd64"
+      - "--label=org.opencontainers.image.created={{.Date}}"
+      - "--label=org.opencontainers.image.title={{.ProjectName}}"
+      - "--label=org.opencontainers.image.revision={{.FullCommit}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+  - use: buildx
+    goos: linux
+    goarch: arm64
+    image_templates:
+      - "ghcr.io/archway-network/{{ .ProjectName }}:{{ .Version }}-arm64v8"
+    build_flag_templates:
+      - "--pull"
+      - "--platform=linux/arm64"
+      - "--label=org.opencontainers.image.created={{.Date}}"
+      - "--label=org.opencontainers.image.title={{.ProjectName}}"
+      - "--label=org.opencontainers.image.revision={{.FullCommit}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+docker_manifests:
+  - name_template: ghcr.io/archway-network/{{ .ProjectName }}:{{ .Version }}
+    image_templates:
+      - ghcr.io/archway-network/{{ .ProjectName }}:{{ .Version }}-amd64
+      - ghcr.io/archway-network/{{ .ProjectName }}:{{ .Version }}-arm64v8

Dockerfile

@@ -0,0 +1,10 @@
+FROM gcr.io/distroless/static-debian12:nonroot
+
+COPY validator-exporter /usr/bin/validator-exporter
+
+# metrics server
+EXPOSE 8008
+
+ENTRYPOINT [ "/usr/bin/validator-exporter" ]
+
+CMD [ "--help" ]

Makefile

@@ -0,0 +1,80 @@
+BUILD_FOLDER = build
+DIST_FOLDER = dist
+GORELEASER_VERSION = v1.22.1
+DOCKER := $(shell which docker)
+PACKAGE_NAME = github.com/archway-network/validator-exporter
+
+.PHONY: all
+all: install
+
+.PHONY: install
+install: go.sum
+	go install cmd/validator-exporter/main.go
+
+.PHONY: go.sum
+go.sum:
+	@echo "--> Ensure dependencies have not been modified"
+	@go mod verify
+
+go-mod-cache: go.sum
+	@echo "--> Download go modules to local cache"
+	@go mod download
+
+.PHONY: build
+build: go.sum
+	go build -o build/validator-exporter ./cmd/validator-exporter/main.go
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILD_FOLDER)
+	rm -rf $(DIST_FOLDER)
+
+.PHONY: test
+test:
+	go test -race ./...
+
+.PHONY: text-cover
+test-cover:
+	go test -race ./... -coverprofile=coverage.out
+	go tool cover -html=coverage.out
+	rm coverage.out
+
+.PHONY: test-ci
+test-ci:
+	@go get ./...
+	@go test ./...
+
+.PHONY: lint
+lint:
+	@golangci-lint run
+	@go mod verify
+
+.PHONY: update
+update:
+	go get -u -d ./...
+	@go mod tidy
+	@go build -o "$(TMPDIR)/validator-exporter" cmd/validator-exporter/main.go
+	@git diff -- go.mod go.sum
+
+
+release-dryrun:
+	$(DOCKER) run \
+		--rm \
+		-e GITHUB_TOKEN="$(GITHUB_TOKEN)" \
+		-v /var/run/docker.sock:/var/run/docker.sock \
+		-v `pwd`:/go/src/$(PACKAGE_NAME) \
+		-w /go/src/$(PACKAGE_NAME) \
+		ghcr.io/goreleaser/goreleaser:$(GORELEASER_VERSION) \
+		--clean \
+		--skip=publish,validate \
+		--snapshot
+
+release:
+	$(DOCKER) run \
+		--rm \
+		-e GITHUB_TOKEN="$(GITHUB_TOKEN)" \
+		-v /var/run/docker.sock:/var/run/docker.sock \
+		-v `pwd`:/go/src/$(PACKAGE_NAME) \
+		-w /go/src/$(PACKAGE_NAME) \
+		ghcr.io/goreleaser/goreleaser:$(GORELEASER_VERSION) \
+		--clean

README.md

@@ -1,2 +1,40 @@
 # validator-exporter
-Prometheus exporter for validator metrics
+Prometheus exporter for cosmos validators metrics.
+
+## Usage
+```
+Usage of validator-exporter:
+  -log-level value
+        Set log level
+  -p int
+        Server port (default 8008)
+
+```
+### Supported env vars
+```
+"GRPC_ADDR" envDefault:"grpc.constantine.archway.tech:443"
+"GRPC_TLS_ENABLED" envDefault:"true"
+"GRPC_TIMEOUT_SECONDS" envDefault:"5"
+"PREFIX" envDefault:"archway"
+```
+### Connecting to archway constantine testnet by default
+```
+validator-exporter
+```
+### Connecting to archway mainnet
+```
+GRPC_ADDR=grpc.mainnet.archway.io:443 validator-exporter
+```
+### Connecting to localnet
+```
+GRPC_TLS_ENABLED=false GRPC_ADDR=localhost:9090 validator-exporter --log-level debug
+```
+
+## Metrics
+```
+# HELP cosmos_validator_missed_blocks Returns missed blocks for a validator.
+# TYPE cosmos_validator_missed_blocks gauge
+cosmos_validator_missed_blocks{moniker="validator_1",valcons="archwayvalcons18le5pevj6sdynyksn77n9z9g8394l3xqk04s3z",valoper="archwayvaloper172zqrqtrwfplwhec44050dhuv66ekcmty4hnfv"} 0
+cosmos_validator_missed_blocks{moniker="validator_2",valcons="archwayvalcons1z4q9zpe8l8puwv8aq4dqadkz4zm244pnu72qcd",valoper="archwayvaloper1370vgzkv5l3kylcylwekzjcdt2hjk2k8zrht6c"} 0
+cosmos_validator_missed_blocks{moniker="validator_3",valcons="archwayvalcons1ep8hnygqw8gvsdfvyanhcfsmvlrvae4s9hljta",valoper="archwayvaloper1scxt3mgxmw3z2hpf8k4mlssz5qvljmtaplv6nz"} 2
+```