chore(deps): update dependency golangci/golangci-lint to v2.3.1

Reviewed-on: #7

.dockerignore

@@ -0,0 +1 @@
+prometheus-fail2ban-exporter

.drone.yml

@@ -1,832 +0,0 @@
----
-kind: pipeline
-type: kubernetes
-name: linter
-
-clone:
-  disable: true
-
-platform:
-  os: linux
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: markdown lint
-  commands:
-  - markdownlint *.md
-  image: git.cryptic.systems/volker.raschek/markdownlint:0.36.0
-  resources:
-    limits:
-      cpu: 150
-      memory: 150M
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  resources:
-    limits:
-      cpu: 150
-      memory: 150M
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  event:
-    exclude:
-    - tag
-
----
-kind: pipeline
-type: docker
-name: unit-test-amd64
-
-clone:
-  disable: true
-
-platform:
-  arch: amd64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: unit-test
-  commands:
-  - go test -v ./...
-  image: docker.io/library/golang:1.21.0
-
-trigger:
-  event:
-    exclude:
-    - tag
-
----
-kind: pipeline
-type: docker
-name: unit-test-arm-v7
-
-clone:
-  disable: true
-
-platform:
-  arch: arm
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: unit-test
-  commands:
-  - go test -v ./...
-  image: docker.io/library/golang:1.21.0
-
-trigger:
-  event:
-    include:
-    - pull_request
-    - push
-    exclude:
-    - tag
-
----
-kind: pipeline
-type: docker
-name: unit-test-arm64
-
-clone:
-  disable: true
-
-platform:
-  arch: arm64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: unit-test
-  commands:
-  - go test -v ./...
-  image: docker.io/library/golang:1.21.0
-
-trigger:
-  event:
-    include:
-    - pull_request
-    - push
-    exclude:
-    - tag
-
----
-kind: pipeline
-type: docker
-name: dry-run-amd64
-
-clone:
-  disable: true
-
-depends_on:
-- linter
-- unit-test-amd64
-
-platform:
-  os: linux
-  arch: amd64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: false
-    dockerfile: Dockerfile
-    dry_run: true
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    tags: latest-amd64
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  branch:
-    exclude:
-    - master
-  event:
-  - pull_request
-  - push
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: docker
-name: dry-run-arm-v7
-
-clone:
-  disable: true
-
-depends_on:
-- linter
-- unit-test-arm-v7
-
-platform:
-  os: linux
-  arch: arm
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: false
-    dockerfile: Dockerfile
-    dry_run: true
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    tags: latest-arm-v7
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  branch:
-    exclude:
-    - master
-  event:
-  - pull_request
-  - push
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: docker
-name: dry-run-arm64-v8
-
-clone:
-  disable: true
-
-depends_on:
-- linter
-- unit-test-arm64
-
-platform:
-  os: linux
-  arch: arm64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: false
-    dockerfile: Dockerfile
-    dry_run: true
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    tags: latest-arm64-v8
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  branch:
-    exclude:
-    - master
-  event:
-  - pull_request
-  - push
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: docker
-name: latest-amd64
-
-clone:
-  disable: true
-
-depends_on:
-- linter
-- unit-test-amd64
-
-platform:
-  os: linux
-  arch: amd64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: false
-    dockerfile: Dockerfile
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    tags: latest-amd64
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  branch:
-  - master
-  event:
-  - cron
-  - push
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: docker
-name: latest-arm-v7
-
-clone:
-  disable: true
-
-depends_on:
-- linter
-- unit-test-arm-v7
-
-platform:
-  os: linux
-  arch: arm
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: false
-    dockerfile: Dockerfile
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    tags: latest-arm-v7
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  branch:
-  - master
-  event:
-  - cron
-  - push
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: docker
-name: latest-arm64-v8
-
-clone:
-  disable: true
-
-depends_on:
-- linter
-- unit-test-arm64
-
-platform:
-  os: linux
-  arch: arm64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: false
-    dockerfile: Dockerfile
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    tags: latest-arm64-v8
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  branch:
-  - master
-  event:
-  - cron
-  - push
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: kubernetes
-name: latest-manifest
-
-clone:
-  disable: true
-
-depends_on:
-- latest-amd64
-- latest-arm-v7
-- latest-arm64-v8
-
-# docker.io/plugins/manifest only for amd64 architectures available
-node_selector:
-  kubernetes.io/os: linux
-  kubernetes.io/arch: amd64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build-manifest
-  image: docker.io/plugins/manifest:1.4.0
-  settings:
-    auto_tag: false
-    ignore_missing: true
-    spec: manifest.tmpl
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  resources:
-    limits:
-      cpu: 150
-      memory: 150M
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  branch:
-  - master
-  event:
-  - cron
-  - push
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: docker
-name: tagged-amd64
-
-clone:
-  disable: true
-
-platform:
-  os: linux
-  arch: amd64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: true
-    auto_tag_suffix: amd64
-    dockerfile: Dockerfile
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-    build_args:
-    - VERSION=${DRONE_TAG}
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  event:
-  - tag
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: docker
-name: tagged-arm-v7
-
-clone:
-  disable: true
-
-platform:
-  os: linux
-  arch: arm
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: true
-    auto_tag_suffix: arm-v7
-    dockerfile: Dockerfile
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-    build_args:
-    - VERSION=${DRONE_TAG}
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  event:
-  - tag
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: docker
-name: tagged-arm64-v8
-
-clone:
-  disable: true
-
-platform:
-  os: linux
-  arch: arm64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build
-  image: docker.io/plugins/docker:20.10.9
-  settings:
-    auto_tag: true
-    auto_tag_suffix: arm64-v8
-    dockerfile: Dockerfile
-    force_tag: true
-    no_cache: true
-    purge: true
-    mirror:
-      from_secret: docker_io_mirror
-    registry: git.cryptic.systems
-    repo: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-    build_args:
-    - VERSION=${DRONE_TAG}
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  event:
-  - tag
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter
-
----
-kind: pipeline
-type: kubernetes
-name: tagged-manifest
-
-clone:
-  disable: true
-
-depends_on:
-- tagged-amd64
-- tagged-arm-v7
-- tagged-arm64-v8
-
-# docker.io/plugins/manifest only for amd64 architectures available
-node_selector:
-  kubernetes.io/os: linux
-  kubernetes.io/arch: amd64
-
-steps:
-- name: clone
-  image: git.cryptic.systems/volker.raschek/git:1.3.1
-
-- name: build-manifest
-  image: docker.io/plugins/manifest:1.4.0
-  settings:
-    auto_tag: true
-    ignore_missing: true
-    spec: manifest.tmpl
-    username:
-      from_secret: git_cryptic_systems_container_registry_user
-    password:
-      from_secret: git_cryptic_systems_container_registry_password
-
-- name: email-notification
-  environment:
-    SMTP_FROM_ADDRESS:
-      from_secret: smtp_from_address
-    SMTP_FROM_NAME:
-      from_secret: smtp_from_name
-    SMTP_HOST:
-      from_secret: smtp_host
-    SMTP_USERNAME:
-      from_secret: smtp_username
-    SMTP_PASSWORD:
-      from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
-  resources:
-    limits:
-      cpu: 150
-      memory: 150M
-  when:
-    status:
-    - changed
-    - failure
-
-trigger:
-  event:
-  - tag
-  repo:
-  - volker.raschek/prometheus-fail2ban-exporter

.editorconfig

@@ -1,15 +1,13 @@
-# EditorConfig is awesome: https://EditorConfig.org
-
-# top-most EditorConfig file
+# Editor configuration, see http://editorconfig.org
 root = true
 
 [*]
-indent_style = space
-indent_size = 2
-end_of_line = lf
 charset = utf-8
-trim_trailing_whitespace = true
+end_of_line = lf
+indent_size = 2
+indent_style = space
 insert_final_newline = false
+trim_trailing_whitespace = true
 
-[Makefile]
+[{Makefile,*.go}]
 indent_style = tab

.gitea/workflows/golang-linters.yaml

@@ -0,0 +1,29 @@
+name: "Lint Golang files"
+
+on:
+  pull_request:
+    types: [ "opened", "reopened", "synchronize" ]
+  push:
+    branches: [ '**' ]
+    tags-ignore: [ '**' ]
+  workflow_dispatch: {}
+
+permissions:
+  contents: read
+
+jobs:
+  golangci:
+    name: "Run golang CI linter"
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        go: [ stable ]
+        os: [ ubuntu-latest-amd64, ubuntu-latest-arm64 ]
+    steps:
+    - uses: actions/checkout@v4.3.0
+    - uses: actions/setup-go@v5.5.0
+      with:
+        go-version: ${{ matrix.go }}
+    - uses: golangci/golangci-lint-action@v8.0.0
+      with:
+v2.3.1 # renovate: datasource=github-releases depName=golangci/golangci-lint

.gitea/workflows/golang-tests.yaml

@@ -0,0 +1,42 @@
+name: "Run Golang tests"
+
+on:
+  pull_request:
+    types: [ "opened", "reopened", "synchronize" ]
+  push:
+    branches: [ '**' ]
+    tags-ignore: [ '**' ]
+  workflow_dispatch: {}
+
+jobs:
+  # integration-test:
+  #   name: "Run integration tests"
+  #   runs-on: ${{ matrix.os }}
+  #   strategy:
+  #     matrix:
+  #       go: [ stable ]
+  #       os: [ ubuntu-latest-amd64, ubuntu-latest-arm64 ]
+  #   steps:
+  #   - uses: actions/checkout@v4.3.0
+  #   - uses: actions/setup-go@v5.5.0
+  #     with:
+  #       go-version: ${{ matrix.go }}
+  #   - env:
+  #       GOPROXY: ${{ vars.GOPROXY }}
+  #     run: make test/integration
+
+  unit-test:
+    name: "Run unit tests"
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        go: [ stable ]
+        os: [ ubuntu-latest-amd64, ubuntu-latest-arm64 ]
+    steps:
+    - uses: actions/checkout@v4.3.0
+    - uses: actions/setup-go@v5.5.0
+      with:
+        go-version: ${{ matrix.go }}
+    - env:
+        GOPROXY: ${{ vars.GOPROXY }}
+      run: make test/unit

.gitea/workflows/markdown-linters.yaml

@@ -0,0 +1,19 @@
+name: "Lint Markdown files"
+
+on:
+  pull_request:
+    types: [ "opened", "reopened", "synchronize" ]
+  push:
+    branches: [ '*' ]
+    tags-ignore: [ '*' ]
+  workflow_dispatch: {}
+
+jobs:
+  markdown-lint:
+    name: "Run markdown linter"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4.3.0
+    - uses: DavidAnson/markdownlint-cli2-action@v20.0.0
+      with:
+        globs: '**/*.md'

.gitea/workflows/release.yaml

@@ -0,0 +1,53 @@
+name: "Release"
+
+on:
+  push:
+    tags: [ '**' ]
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    name: "Release application"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4.3.0
+    - uses: docker/setup-qemu-action@v3.6.0
+    - uses: actions/setup-go@v5.5.0
+      with:
+        go-version: stable
+    - uses: docker/login-action@v3.5.0
+      with:
+        registry: git.cryptic.systems
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GIT_CRYPTIC_SYSTEMS_PACKAGE_REGISTRY_TOKEN }}
+    - env:
+        GITEA_TOKEN: ${{ secrets.GIT_CRYPTIC_SYSTEMS_PACKAGE_REGISTRY_TOKEN }}
+        GONOSUMDB: ${{ vars.GONOSUMDB }}
+        GOPROXY: ${{ vars.GOPROXY }}
+      uses: goreleaser/goreleaser-action@v6.3.0
+      with:
+        version: v2.11.2 # renovate: datasource=github-releases depName=goreleaser/goreleaser
+        args: release --clean
+
+  sync-to-hub-docker-io:
+    name: "Upload Images to docker.io"
+    needs:
+    - release
+    runs-on: ubuntu-latest
+    steps:
+    - name: Copy images to docker.io
+      run: |
+        TAG=$(echo ${{ github.ref_name }} | sed 's/v//gm')
+
+        apt-get update --yes
+        apt-get install --yes skopeo
+        skopeo copy \
+          --all \
+          --dest-password ${{ secrets.DOCKER_IO_PASSWORD }} \
+          --dest-username ${{ secrets.DOCKER_IO_USERNAME }} \
+          --src-password ${{ secrets.GIT_CRYPTIC_SYSTEMS_PACKAGE_REGISTRY_TOKEN }} \
+          --src-username volker.raschek \
+            docker://git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter:${TAG} \
+            docker://docker.io/volkerraschek/prometheus-fail2ban-exporter:${TAG}

.gitea/workflows/update-docker-hub-description.yaml

@@ -0,0 +1,20 @@
+name: Update Docker Hub Description
+
+on:
+  push:
+    branches: [ 'master' ]
+    paths: [ 'README.md' ]
+  workflow_dispatch: {}
+
+jobs:
+  update-description-on-hub-docker-io:
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4.3.0
+    - uses: peter-evans/dockerhub-description@v4.0.2
+      with:
+        username: ${{ secrets.DOCKER_IO_USERNAME }}
+        password: ${{ secrets.DOCKER_IO_PASSWORD }}
+        repository: volkerraschek/prometheus-fail2ban-exporter
+        readme-filepath: README.md

.gitignore

@@ -1,8 +1,3 @@
-.idea/
-vendor/
-*.iml
-
-build/
-dist/
-
 prometheus-fail2ban-exporter
+coverage.txt
+dist

.golangci.yaml

@@ -0,0 +1,13 @@
+version: "2"
+linters:
+  default: standard
+  enable:
+  - errname
+  - gosec
+
+  exclusions:
+    rules: []
+    warn-unused: true
+
+run:
+  tests: true

.goreleaser.yaml

@@ -0,0 +1,175 @@
+project_name: prometheus-fail2ban-exporter
+
+archives:
+- formats: [ "tar.xz" ]
+  files:
+  - README.md
+  - LICENSE
+
+before:
+  hooks:
+  - go mod tidy
+
+builds:
+- main: main.go
+  binary: >-
+    {{ .ProjectName }}-
+    {{- .Version }}-
+    {{- .Os }}-
+    {{- if eq .Arch "amd64" }}amd64
+    {{- else if eq .Arch "amd64_v1" }}amd64
+    {{- else }}{{ .Arch }}{{ end }}
+    {{- if .Arm }}-{{ .Arm }}{{ end }}
+  env:
+  - CGO_ENABLED=0
+  - GONOSUMDB={{ .Env.GONOSUMDB }}
+  - GOPROXY={{ .Env.GOPROXY }}
+  goos:
+  - linux
+  goarch:
+  - amd64
+  - arm
+  - arm64
+  - riscv64
+  goarm:
+  - "6"
+  - "7"
+  flags:
+  - -trimpath
+  ldflags:
+  - -s -w -X 'main.version={{ trimprefix .Tag "v" }}' -X 'main.date={{ time "2006-01-02T15:04:05Z07:00" }}'
+
+changelog:
+  filters:
+    exclude:
+    - '^chore'
+    - '^docs'
+    - '^test'
+    - Merge pull request
+    - Merge branch
+    - go mod tidy
+  format: "{{.SHA}}: {{.Message}} (@{{.AuthorUsername}})"
+  groups:
+  - title: Features
+    regexp: '^.*?feat(\([[:word:]]+\))??!?:.+$'
+    order: 0
+  - title: "Bug fixes"
+    regexp: '^.*?fix(\([[:word:]]+\))??!?:.+$'
+    order: 1
+  - title: Others
+    order: 999
+  sort: asc
+  use: git
+
+dockers:
+- build_flag_templates:
+  - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+  - --label=org.opencontainers.image.description={{ .ProjectName }}
+  - --label=org.opencontainers.image.documentation={{ .ProjectName }}
+  - --label=org.opencontainers.image.revision={{ .FullCommit }}
+  - --label=org.opencontainers.image.source={{ .GitURL }}
+  - --label=org.opencontainers.image.title={{ .ProjectName }}
+  - --label=org.opencontainers.image.url=https://git.cryptic.systems/volker.raschek/{{ .ProjectName }}
+  - --label=org.opencontainers.image.version={{ trimprefix .Tag "v" }}
+  - --platform=linux/amd64
+  - --pull
+  dockerfile: Dockerfile
+  goarch: amd64
+  goos: linux
+  image_templates:
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-amd64'
+  skip_push: false
+  use: buildx
+
+- build_flag_templates:
+  - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+  - --label=org.opencontainers.image.description={{ .ProjectName }}
+  - --label=org.opencontainers.image.documentation={{ .ProjectName }}
+  - --label=org.opencontainers.image.revision={{ .FullCommit }}
+  - --label=org.opencontainers.image.source={{ .GitURL }}
+  - --label=org.opencontainers.image.title={{ .ProjectName }}
+  - --label=org.opencontainers.image.url=https://git.cryptic.systems/volker.raschek/{{ .ProjectName }}
+  - --label=org.opencontainers.image.version={{ trimprefix .Tag "v" }}
+  - --platform=linux/arm/v6
+  - --pull
+  dockerfile: Dockerfile
+  goarch: arm
+  goarm: "6"
+  goos: linux
+  image_templates:
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-arm-v6'
+  skip_push: false
+  use: buildx
+
+- build_flag_templates:
+  - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+  - --label=org.opencontainers.image.description={{ .ProjectName }}
+  - --label=org.opencontainers.image.documentation={{ .ProjectName }}
+  - --label=org.opencontainers.image.revision={{ .FullCommit }}
+  - --label=org.opencontainers.image.source={{ .GitURL }}
+  - --label=org.opencontainers.image.title={{ .ProjectName }}
+  - --label=org.opencontainers.image.url=https://git.cryptic.systems/volker.raschek/{{ .ProjectName }}
+  - --label=org.opencontainers.image.version={{ trimprefix .Tag "v" }}
+  - --platform=linux/arm/v7
+  - --pull
+  dockerfile: Dockerfile
+  goarch: arm
+  goarm: "7"
+  goos: linux
+  image_templates:
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-arm-v7'
+  skip_push: false
+  use: buildx
+
+- build_flag_templates:
+  - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+  - --label=org.opencontainers.image.description={{ .ProjectName }}
+  - --label=org.opencontainers.image.documentation={{ .ProjectName }}
+  - --label=org.opencontainers.image.revision={{ .FullCommit }}
+  - --label=org.opencontainers.image.source={{ .GitURL }}
+  - --label=org.opencontainers.image.title={{ .ProjectName }}
+  - --label=org.opencontainers.image.url=https://git.cryptic.systems/volker.raschek/{{ .ProjectName }}
+  - --label=org.opencontainers.image.version={{ trimprefix .Tag "v" }}
+  - --platform=linux/arm64
+  - --pull
+  dockerfile: Dockerfile
+  goarch: arm64
+  goos: linux
+  image_templates:
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-arm64'
+  skip_push: false
+  use: buildx
+
+- build_flag_templates:
+  - --label=org.opencontainers.image.created={{ time "2006-01-02T15:04:05Z07:00" }}
+  - --label=org.opencontainers.image.description={{ .ProjectName }}
+  - --label=org.opencontainers.image.documentation={{ .ProjectName }}
+  - --label=org.opencontainers.image.revision={{ .FullCommit }}
+  - --label=org.opencontainers.image.source={{ .GitURL }}
+  - --label=org.opencontainers.image.title={{ .ProjectName }}
+  - --label=org.opencontainers.image.url=https://git.cryptic.systems/volker.raschek/{{ .ProjectName }}
+  - --label=org.opencontainers.image.version={{ trimprefix .Tag "v" }}
+  - --platform=linux/riscv64
+  - --pull
+  dockerfile: Dockerfile
+  goarch: riscv64
+  goos: linux
+  image_templates:
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-riscv64'
+  skip_push: false
+  use: buildx
+
+docker_manifests:
+- name_template: 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}'
+  image_templates:
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-amd64'
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-arm-v6'
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-arm-v7'
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-arm64'
+  - 'git.cryptic.systems/volker.raschek/{{ .ProjectName }}:{{ trimprefix .Tag "v" }}-riscv64'
+
+gitea_urls:
+  api: https://git.cryptic.systems/api/v1
+  download: https://git.cryptic.systems
+
+version: 2

.markdownlint.yaml

@@ -45,19 +45,17 @@ MD012:
 # MD013/line-length - Line length
 MD013:
   # Number of characters
-  line_length: 80
+  line_length: 120
   # Number of characters for headings
-  heading_line_length: 80
+  heading_line_length: 120
   # Number of characters for code blocks
-  code_block_line_length: 80
+  code_block_line_length: 120
   # Include code blocks
   code_blocks: false
   # Include tables
   tables: false
   # Include headings
   headings: true
-  # Include headings
-  headers: true
   # Strict length checking
   strict: false
   # Stern length checking
@@ -70,11 +68,6 @@ MD022:
   # Blank lines below heading
   lines_below: 1
 
-# MD024/no-duplicate-heading/no-duplicate-header - Multiple headings with the same content
-MD024:
-  # Only check sibling headings
-  allow_different_nesting: true
-
 # MD025/single-title/single-h1 - Multiple top-level headings in the same document
 MD025:
   # Heading level

Dockerfile

@@ -1,19 +1,5 @@
-FROM docker.io/library/golang:1.20.5-buster AS build
+FROM scratch AS build
 
-WORKDIR /workspace
-ADD . /workspace
-
-RUN apt update --yes && \
-    apt install --yes build-essential && \
-    make install \
-      PREFIX=/usr \
-      DESTDIR=/app \
-      EXECUTABLE=prometheus-fail2ban-exporter
-
-FROM docker.io/library/debian:10-slim
-
-COPY --from=build /app /
-
-EXPOSE 9191
+COPY prometheus-fail2ban-exporter-* /usr/bin/prometheus-fail2ban-exporter
 
 ENTRYPOINT [ "/usr/bin/prometheus-fail2ban-exporter" ]

Makefile

@@ -1,85 +1,118 @@
+EXECUTABLE=prometheus-fail2ban-exporter
+VERSION?=$(shell git describe --abbrev=0)+hash.$(shell git rev-parse --short HEAD)
+
+# Destination directory and prefix to place the compiled binaries, documentaions
+# and other files.
 DESTDIR?=
 PREFIX?=/usr/local
-EXECUTABLE?=prometheus-fail2ban-exporter
 
+# CONTAINER_RUNTIME
+# The CONTAINER_RUNTIME variable will be used to specified the path to a
+# container runtime. This is needed to start and run a container image.
 CONTAINER_RUNTIME?=$(shell which podman)
 
-# List make commands
-.PHONY: ls
-ls:
-	cat Makefile | grep "^[a-zA-Z#].*" | cut -d ":" -f 1 | sed s';#;\n#;'g
+# PROM_FAIL2BAN_EXP_IMAGE_REGISTRY_NAME
+# Defines the name of the new container to be built using several variables.
+PROM_FAIL2BAN_EXP_IMAGE_REGISTRY_NAME:=git.cryptic.systems
+PROM_FAIL2BAN_EXP_IMAGE_REGISTRY_USER:=volker.raschek
 
-# Download dependencies
-.PHONY: download
-download:
-	go mod download
+PROM_FAIL2BAN_EXP_IMAGE_NAMESPACE?=${PROM_FAIL2BAN_EXP_IMAGE_REGISTRY_USER}
+PROM_FAIL2BAN_EXP_IMAGE_NAME:=${EXECUTABLE}
+PROM_FAIL2BAN_EXP_IMAGE_VERSION?=latest
+PROM_FAIL2BAN_EXP_IMAGE_FULLY_QUALIFIED=${PROM_FAIL2BAN_EXP_IMAGE_REGISTRY_NAME}/${PROM_FAIL2BAN_EXP_IMAGE_NAMESPACE}/${PROM_FAIL2BAN_EXP_IMAGE_NAME}:${PROM_FAIL2BAN_EXP_IMAGE_VERSION}
 
-# Update project dependencies
-.PHONY: update
-update:
-	go get -u
-	go mod download
-	go mod tidy
+# BIN
+# ==============================================================================
+prometheus-fail2ban-exporter:
+	CGO_ENABLED=0 \
+	GOPROXY=$(shell go env GOPROXY) \
+		go build -ldflags "-X 'main.version=${VERSION}' -X 'main.date=$(shell date --rfc-3339=seconds )'" -o ${@} main.go
 
-# Run project tests
-.PHONY: test
-test: download
-	go test ./... -v -race
+# CLEAN
+# ==============================================================================
+PHONY+=clean
+clean:
+	rm --force --recursive prometheus-fail2ban-exporter
 
-# Look for "suspicious constructs" in source code
-.PHONY: vet
-vet: download
-	go vet ./...
+# TESTS
+# ==============================================================================
+PHONY+=test/unit
+test/unit:
+	CGO_ENABLED=0 \
+	GOPROXY=$(shell go env GOPROXY) \
+		go test -v -p 1 -coverprofile=coverage.txt -covermode=count -timeout 1200s ./...
 
-# Format code
-.PHONY: fmt
-fmt: download
-	go mod tidy
-	go fmt ./...
+PHONY+=test/integration
+test/integration:
+	CGO_ENABLED=0 \
+	GOPROXY=$(shell go env GOPROXY) \
+		go test -v -p 1 -count=1 -timeout 1200s ./it/...
 
-# Check for unformatted go code
-.PHONY: check/fmt
-check/fmt: download
-	test -z $(shell gofmt -l .)
+PHONY+=test/coverage
+test/coverage: test/unit
+	CGO_ENABLED=0 \
+	GOPROXY=$(shell go env GOPROXY) \
+		go tool cover -html=coverage.txt
 
-# Build project
-.PHONY: build
-build:
-	CGO_ENABLED=0 go build \
-	-ldflags "\
-	-X main.version=${shell git describe --tags} \
-	-X main.commit=${shell git rev-parse HEAD} \
-	-X main.date=${shell date --iso-8601=seconds} \
-	-X main.builtBy=manual \
-	" \
-	-trimpath \
-	-o ${EXECUTABLE} \
-	exporter.go
+# GOLANGCI-LINT
+# ==============================================================================
+PHONY+=golangci-lint
+golangci-lint:
+	golangci-lint run --concurrency=$(shell nproc)
 
-# build container-image
-.PHONY: build/container-image
-build/container-image:
+# INSTALL
+# ==============================================================================
+PHONY+=uninstall
+install: prometheus-fail2ban-exporter
+	install --directory ${DESTDIR}/etc/bash_completion.d
+	./prometheus-fail2ban-exporter completion bash > ${DESTDIR}/etc/bash_completion.d/${EXECUTABLE}
+
+	install --directory ${DESTDIR}${PREFIX}/bin
+	install --mode 0755 ${EXECUTABLE} ${DESTDIR}${PREFIX}/bin/${EXECUTABLE}
+
+	install --directory ${DESTDIR}${PREFIX}/share/licenses/${EXECUTABLE}
+	install --mode 0644 LICENSE ${DESTDIR}${PREFIX}/share/licenses/${EXECUTABLE}/LICENSE
+
+	install --directory ${DESTDIR}${PREFIX}/systemd/system
+	install --mode 0644 systemd/systemd.service ${DESTDIR}${PREFIX}/systemd/system/${EXECUTABLE}.service
+	sed --in-place --regexp-extended 's/EXECUTABLE/${EXECUTABLE}/gm' ${DESTDIR}${PREFIX}/systemd/system/${EXECUTABLE}.service
+
+# UNINSTALL
+# ==============================================================================
+PHONY+=uninstall
+uninstall:
+	-rm --force --recursive \
+		${DESTDIR}/etc/bash_completion.d/${EXECUTABLE} \
+		${DESTDIR}${PREFIX}/bin/${EXECUTABLE} \
+		${DESTDIR}${PREFIX}/share/licenses/${EXECUTABLE}
+
+# BUILD CONTAINER IMAGE
+# ==============================================================================
+PHONY+=container-image/build
+container-image/build:
 	${CONTAINER_RUNTIME} build \
-		--tag ${EXECUTABLE} \
+		--build-arg VERSION=${VERSION} \
+		--file Dockerfile \
+		--no-cache \
+		--pull \
+		--tag ${PROM_FAIL2BAN_EXP_IMAGE_FULLY_QUALIFIED} \
 		.
 
-.PHONY: install
-install: build
-	mkdir --parents ${DESTDIR}/usr/lib/systemd/system
-	sed -e "s/EXECUTABLE/${EXECUTABLE}/gm" systemd/systemd.service > ${DESTDIR}/usr/lib/systemd/system/${EXECUTABLE}.service
-	chmod 0644 ${DESTDIR}/usr/lib/systemd/system/${EXECUTABLE}.service
+# DELETE CONTAINER IMAGE
+# ==============================================================================
+PHONY:=container-image/delete
+container-image/delete:
+	- ${CONTAINER_RUNTIME} image rm ${PROM_FAIL2BAN_EXP_IMAGE_FULLY_QUALIFIED}
 
-	install -D --mode 0755 --target-directory ${DESTDIR}${PREFIX}/bin ${EXECUTABLE}
+# PUSH CONTAINER IMAGE
+# ==============================================================================
+PHONY+=container-image/push
+container-image/push:
+	echo ${PROM_FAIL2BAN_EXP_IMAGE_REGISTRY_PASSWORD} | ${CONTAINER_RUNTIME} login ${PROM_FAIL2BAN_EXP_IMAGE_REGISTRY_NAME} --username ${PROM_FAIL2BAN_EXP_IMAGE_REGISTRY_USER} --password-stdin
+	${CONTAINER_RUNTIME} push ${PROM_FAIL2BAN_EXP_IMAGE_FULLY_QUALIFIED}
 
-# NOTE: Set restrict file permissions by default to protect optional basic auth credentials
-	install -D --mode 0600 env ${DESTDIR}/etc/conf.d/${EXECUTABLE}
-
-	install -D --mode 0755 --target-directory ${DESTDIR}${PREFIX}/share/licenses/${EXECUTABLE} LICENSE
-
-.PHONY: uninstall
-uninstall:
-	-rm --recursive --force \
-		${DESTDIR}${PREFIX}/bin/${EXECUTABLE} \
-		${DESTDIR}/usr/lib/systemd/system/${EXECUTABLE}.service \
-		${DESTDIR}/etc/conf.d/${EXECUTABLE} \
-		${DESTDIR}${PREFIX}/share/licenses/${EXECUTABLE}/LICENSE
+# PHONY
+# ==============================================================================
+# Declare the contents of the PHONY variable as phony.  We keep that information
+# in a variable so we can use it in if_changed.
+.PHONY: ${PHONY}

README.md

@@ -1,11 +1,7 @@
 # prometheus-fail2ban-exporter
 
-[![Build Status](https://drone.cryptic.systems/api/badges/volker.raschek/prometheus-fail2ban-exporter/status.svg)](https://drone.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter)
-
-This is a fork of Hector's fail2ban
-[exporter](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter). This
-fork contains some changes to get the application running in a kubernetes
-cluster.
+This is a fork of Hector's fail2ban [exporter](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter). This fork
+contains some changes to get the application running in a kubernetes cluster.
 
 ## Table of Contents
 
@@ -21,8 +17,8 @@ The exporter can be run as a standalone binary or a docker container.
 
 ### 1.1. Standalone
 
-The following command will start collecting metrics from the
-`/var/run/fail2ban/fail2ban.sock` file and expose them on port `9191`.
+The following command will start collecting metrics from the `/var/run/fail2ban/fail2ban.sock` file and expose them on
+port `9191`.
 
 ```bash
 $ fail2ban_exporter --collector.f2b.socket=/var/run/fail2ban/fail2ban.sock --web.listen-address=":9191"
@@ -35,12 +31,10 @@ $ fail2ban_exporter --collector.f2b.socket=/var/run/fail2ban/fail2ban.sock --web
 ```
 
 Binary files for each release can be found on the
-[releases](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/-/releases)
-page.
+[releases](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/-/releases) page.
 
-There is also an [example systemd service
-file](/_examples/systemd/fail2ban_exporter.service) included in the repository.
-This is a starting point to run the exporter as a service.
+There is also an [example systemd service file](/_examples/systemd/fail2ban_exporter.service) included in the
+repository. This is a starting point to run the exporter as a service.
 
 ### 1.2. Docker
 
@@ -68,14 +62,11 @@ services:
 ```
 
 Use the `:latest` tag to get the latest stable release. See the [registry
-page](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/container_registry)
-for all available tags.
+page](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/container_registry) for all available tags.
 
-**NOTE:** While it is possible to mount the `fail2ban.sock` file directly, it is
-recommended to mount the parent folder instead. The `.sock` file is deleted by
-fail2ban on shutdown and re-created on startup and this causes problems for the
-docker mount. See [this
-reply](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/-/issues/11#note_665003499)
+**NOTE:** While it is possible to mount the `fail2ban.sock` file directly, it is recommended to mount the parent folder
+instead. The `.sock` file is deleted by fail2ban on shutdown and re-created on startup and this causes problems for the
+docker mount. See [this reply](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/-/issues/11#note_665003499)
 for more details.
 
 ## 2. Metrics
@@ -117,20 +108,18 @@ Status for the jail: sshd
 
 ### 2.1. Grafana
 
-The metrics exported by this tool are compatible with Prometheus and Grafana. A
-sample grafana dashboard can be found in the
-[grafana.json](/_examples/grafana/dashboard.json) file. Just import the contents
-of this file into a new Grafana dashboard to get started.
+The metrics exported by this tool are compatible with Prometheus and Grafana. A sample grafana dashboard can be found in
+the [grafana.json](/_examples/grafana/dashboard.json) file. Just import the contents of this file into a new Grafana
+dashboard to get started.
 
-The dashboard supports displaying data from multiple exporters. Use the
-`instance` dashboard variable to select which ones to display.
+The dashboard supports displaying data from multiple exporters. Use the `instance` dashboard variable to select which
+ones to display.
 
 *(Sample dashboard is compatible with Grafana `9.1.8` and above)*
 
 ## 3. Configuration
 
-The exporter is configured with CLI flags and environment variables.
-There are no configuration files.
+The exporter is configured with CLI flags and environment variables. There are no configuration files.
 
 ### CLI flags
 
@@ -164,8 +153,7 @@ Flags:
 
 ### Environment variables
 
-Each environment variable corresponds to a CLI flag.
-If both are specified, the CLI flag takes precedence.
+Each environment variable corresponds to a CLI flag. If both are specified, the CLI flag takes precedence.
 
 | Environment variable            | Corresponding CLI flag                            |
 |---------------------------------|---------------------------------------------------|
@@ -185,23 +173,18 @@ Building from source has the following dependencies:
 
 From there, simply run `make build`
 
-This will download the necessary dependencies and build a `fail2ban_exporter`
-binary in the root of the project.
+This will download the necessary dependencies and build a `fail2ban_exporter` binary in the root of the project.
 
 ## 5. Textfile metrics
 
-For more flexibility the exporter also allows exporting metrics collected from a
-text file.
+For more flexibility the exporter also allows exporting metrics collected from a text file.
 
-To enable textfile metrics provide the directory to read files from with the
-`--collector.textfile.directory` flag.
+To enable textfile metrics provide the directory to read files from with the `--collector.textfile.directory` flag.
 
-Metrics collected from these files will be exposed directly alongside the other
-metrics without any additional processing. This means that it is the
-responsibility of the file creator to ensure the format is correct.
+Metrics collected from these files will be exposed directly alongside the other metrics without any additional
+processing. This means that it is the responsibility of the file creator to ensure the format is correct.
 
-By exporting textfile metrics an extra metric is also exported with an error
-count for each file:
+By exporting textfile metrics an extra metric is also exported with an error count for each file:
 
 ```text
 # HELP textfile_error Checks for errors while reading text files
@@ -213,8 +196,7 @@ textfile_error{path="file.prom"} 0
 
 ### Running in Docker
 
-To collect textfile metrics inside a docker container, a couple of things need
-to be done:
+To collect textfile metrics inside a docker container, a couple of things need to be done:
 
 1. Mount the folder with the metrics files
 2. Set the `F2B_COLLECTOR_TEXT_PATH` environment variable

_examples/grafana/dashboard.json

@@ -68,7 +68,7 @@
     {
       "datasource": {
         "type": "prometheus",
-        "uid": "${DS_PROMETHEUS}"
+        "uid": "prometheus"
       },
       "description": "",
       "fieldConfig": {
@@ -129,7 +129,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": false,
@@ -143,7 +143,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": false,
@@ -158,7 +158,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": false,
@@ -230,7 +230,7 @@
     {
       "datasource": {
         "type": "prometheus",
-        "uid": "${DS_PROMETHEUS}"
+        "uid": "prometheus"
       },
       "description": "",
       "fieldConfig": {
@@ -309,7 +309,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": true,
@@ -328,7 +328,7 @@
     {
       "datasource": {
         "type": "prometheus",
-        "uid": "${DS_PROMETHEUS}"
+        "uid": "prometheus"
       },
       "description": "",
       "fieldConfig": {
@@ -407,7 +407,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": true,
@@ -425,7 +425,7 @@
     {
       "datasource": {
         "type": "prometheus",
-        "uid": "${DS_PROMETHEUS}"
+        "uid": "prometheus"
       },
       "description": "",
       "fieldConfig": {
@@ -504,7 +504,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": true,
@@ -522,7 +522,7 @@
     {
       "datasource": {
         "type": "prometheus",
-        "uid": "${DS_PROMETHEUS}"
+        "uid": "prometheus"
       },
       "description": "",
       "fieldConfig": {
@@ -601,7 +601,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": true,
@@ -619,7 +619,7 @@
     {
       "datasource": {
         "type": "prometheus",
-        "uid": "${DS_PROMETHEUS}"
+        "uid": "prometheus"
       },
       "description": "",
       "fieldConfig": {
@@ -699,7 +699,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": true,
@@ -717,7 +717,7 @@
     {
       "datasource": {
         "type": "prometheus",
-        "uid": "${DS_PROMETHEUS}"
+        "uid": "prometheus"
       },
       "description": "",
       "fieldConfig": {
@@ -797,7 +797,7 @@
         {
           "datasource": {
             "type": "prometheus",
-            "uid": "${DS_PROMETHEUS}"
+            "uid": "prometheus"
           },
           "editorMode": "code",
           "exemplar": true,
@@ -842,7 +842,7 @@
         "current": {},
         "datasource": {
           "type": "prometheus",
-          "uid": "${DS_PROMETHEUS}"
+          "uid": "prometheus"
         },
         "definition": "f2b_up",
         "description": "Select which instance(s) to show",

_examples/systemd/README.md

@@ -1,7 +1,9 @@
 # Systemd
 
 The `.service` file in this directory should be copied to the `/etc/systemd/system/` folder.
+
 - It expects the binary file to be installed at `/usr/sbin/fail2ban_exporter`.
-- It expects a user named `fail2ban_exporter` to exist. This user should not have a shell or any special privileges aside from read-access to the fail2ban socket file.
+- It expects a user named `fail2ban_exporter` to exist. This user should not have a shell or any special privileges
+  aside from read-access to the fail2ban socket file.
 
 The `ExecStart` line can be modified to add any custom CLI flags.

cfg/cfg.go

@@ -74,7 +74,7 @@ func validateFlags(cliCtx *kong.Context) {
 		}
 	}
 	if !flagsValid {
-		cliCtx.PrintUsage(false)
+		_ = cliCtx.PrintUsage(false)
 		fmt.Println()
 		for i := 0; i < len(messages); i++ {
 			fmt.Println(messages[i])

collector/f2b/collector.go

@@ -50,7 +50,7 @@ func (c *Collector) Collect(ch chan<- prometheus.Metric) {
 			os.Exit(1)
 		}
 	} else {
-		defer s.Close()
+		defer func() { _ = s.Close() }()
 	}
 
 	c.collectServerUpMetric(ch, s)

go.mod

@@ -1,22 +1,25 @@
 module git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter
 
-go 1.20
+go 1.23.0
+
+toolchain go1.24.6
 
 require (
-	github.com/alecthomas/kong v0.8.0
-	github.com/kisielk/og-rek v1.2.0
-	github.com/nlpodyssey/gopickle v0.2.0
-	github.com/prometheus/client_golang v1.16.0
+	github.com/alecthomas/kong v1.12.1
+	github.com/kisielk/og-rek v1.3.0
+	github.com/nlpodyssey/gopickle v0.3.0
+	github.com/prometheus/client_golang v1.23.0
 )
 
 require (
+	github.com/aristanetworks/gomap v0.0.0-20240919214256-2b26376628e1 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
-	github.com/prometheus/client_model v0.4.0 // indirect
-	github.com/prometheus/common v0.44.0 // indirect
-	github.com/prometheus/procfs v0.11.0 // indirect
-	golang.org/x/sys v0.9.0 // indirect
-	google.golang.org/protobuf v1.31.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.65.0 // indirect
+	github.com/prometheus/procfs v0.16.1 // indirect
+	golang.org/x/sys v0.33.0 // indirect
+	golang.org/x/text v0.25.0 // indirect
+	google.golang.org/protobuf v1.36.6 // indirect
 )

go.sum

@@ -1,38 +1,50 @@
-github.com/alecthomas/assert/v2 v2.1.0 h1:tbredtNcQnoSd3QBhQWI7QZ3XHOVkw1Moklp2ojoH/0=
-github.com/alecthomas/kong v0.8.0 h1:ryDCzutfIqJPnNn0omnrgHLbAggDQM2VWHikE1xqK7s=
-github.com/alecthomas/kong v0.8.0/go.mod h1:n1iCIO2xS46oE8ZfYCNDqdR0b0wZNrXAIAqro/2132U=
-github.com/alecthomas/repr v0.1.0 h1:ENn2e1+J3k09gyj2shc0dHr/yjaWSHRlrJ4DPMevDqE=
+github.com/alecthomas/assert/v2 v2.11.0 h1:2Q9r3ki8+JYXvGsDyBXwH3LcJ+WK5D0gc5E8vS6K3D0=
+github.com/alecthomas/assert/v2 v2.11.0/go.mod h1:Bze95FyfUr7x34QZrjL+XP+0qgp/zg8yS+TtBj1WA3k=
+github.com/alecthomas/kong v1.12.1 h1:iq6aMJDcFYP9uFrLdsiZQ2ZMmcshduyGv4Pek0MQPW0=
+github.com/alecthomas/kong v1.12.1/go.mod h1:p2vqieVMeTAnaC83txKtXe8FLke2X07aruPWXyMPQrU=
+github.com/alecthomas/repr v0.4.0 h1:GhI2A8MACjfegCPVq9f1FLvIBS+DrQ2KQBFZP1iFzXc=
+github.com/alecthomas/repr v0.4.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
+github.com/aristanetworks/gomap v0.0.0-20240919214256-2b26376628e1 h1:D5mrqTj0YyG8O2A2SUCuPc2Qf68vyTBaWChSBAJtYJk=
+github.com/aristanetworks/gomap v0.0.0-20240919214256-2b26376628e1/go.mod h1:v/+Hpx3wuPnPWEwT1unZJsNUe4Pu/y1Y+qAf+xj0Ykg=
 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/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
-github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
-github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
+github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/hexops/gotextdiff v1.0.3 h1:gitA9+qJrrTCsiCl7+kh75nPqQt1cx4ZkudSTLoUqJM=
-github.com/kisielk/og-rek v1.2.0 h1:CTvDIin+YnetsSQAYbe+QNAxXU3B50C5hseEz8xEoJw=
-github.com/kisielk/og-rek v1.2.0/go.mod h1:6ihsOSzSAxR/65S3Bn9zNihoEqRquhDQZ2c6I2+MG3c=
-github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
-github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
-github.com/nlpodyssey/gopickle v0.2.0 h1:4naD2DVylYJupQLbCQFdwo6yiXEmPyp+0xf5MVlrBDY=
-github.com/nlpodyssey/gopickle v0.2.0/go.mod h1:YIUwjJ2O7+vnBsxUN+MHAAI3N+adqEGiw+nDpwW95bY=
-github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
-github.com/prometheus/client_golang v1.16.0/go.mod h1:Zsulrv/L9oM40tJ7T815tM89lFEugiJ9HzIqaAx4LKc=
-github.com/prometheus/client_model v0.4.0 h1:5lQXD3cAg1OXBf4Wq03gTrXHeaV0TQvGfUooCfx1yqY=
-github.com/prometheus/client_model v0.4.0/go.mod h1:oMQmHW1/JoDwqLtg57MGgP/Fb1CJEYF2imWWhWtMkYU=
-github.com/prometheus/common v0.44.0 h1:+5BrQJwiBB9xsMygAB3TNvpQKOwlkc25LbISbrdOOfY=
-github.com/prometheus/common v0.44.0/go.mod h1:ofAIvZbQ1e/nugmZGz4/qCb9Ap1VoSTIO7x0VV9VvuY=
-github.com/prometheus/procfs v0.11.0 h1:5EAgkfkMl659uZPbe9AS2N68a7Cc1TJbPEuGzFuRbyk=
-github.com/prometheus/procfs v0.11.0/go.mod h1:nwNm2aOCAYw8uTR/9bWRREkZFxAUcWzPHWJq+XBB/FM=
-golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.9.0 h1:KS/R3tvhPqvJvwcKfnBHJwwthS11LRhmM5D59eEXa0s=
-golang.org/x/sys v0.9.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-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 v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
-google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+github.com/hexops/gotextdiff v1.0.3/go.mod h1:pSWU5MAI3yDq+fZBTazCSJysOMbxWL1BSow5/V2vxeg=
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+github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
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+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
+go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
+golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
+golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/text v0.25.0 h1:qVyWApTSYLk/drJRO5mDlNYskwQznZmkpV2c8q9zls4=
+golang.org/x/text v0.25.0/go.mod h1:WEdwpYrmk1qmdHvhkSTNPm3app7v4rsT8F2UD6+VHIA=
+google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
+google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -16,14 +16,12 @@ import (
 
 var (
 	version = "dev"
-	commit  = "none"
 	date    = "unknown"
-	builtBy = "unknown"
 )
 
 func printAppVersion() {
-	fmt.Println(version)
-	fmt.Printf("    build date:  %s\r\n    commit hash: %s\r\n    built by:    %s\r\n", date, commit, builtBy)
+	fmt.Printf("Version:    %s\n", version)
+	fmt.Printf("Build date: %s\n", date)
 }
 
 func main() {

manifest.tmpl

@@ -1,26 +0,0 @@
-image: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
-{{#if build.tags}}
-tags:
-{{#each build.tags}}
-  - {{this}}
-{{/each}}
-  - "latest"
-{{/if}}
-manifests:
-  -
-    image: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}-amd64
-    platform:
-      architecture: amd64
-      os: linux
-  -
-    image: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}-arm-v7
-    platform:
-      architecture: arm
-      os: linux
-      variant: v7
-  -
-    image: git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}-arm64-v8
-    platform:
-      architecture: arm64
-      os: linux
-      variant: v8

renovate.json

@@ -1,38 +1,10 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "assigneesFromCodeOwners": true,
-  "automergeStrategy": "merge-commit",
-  "automergeType": "pr",
-  "labels": [ "renovate" ],
-  "packageRules": [
-    {
-      "description": "Automatically update minor and patch versions of used drone-ci images",
-      "addLabels": [ "renovate/droneci", "renovate/automerge" ],
-      "excludePackagePatterns": [ "plugins/docker" ],
-      "automerge": true,
-      "matchManagers": "droneci",
-      "matchUpdateTypes": [ "minor", "patch"]
-    },
-    {
-      "description": "Automatically update minor and patch versions of go modules",
-      "addLabels": [ "renovate/gomod", "renovate/automerge" ],
-      "automerge": true,
-      "matchBaseBranches": [ "master" ],
-      "matchManagers": [ "gomod" ],
-      "matchUpdateTypes": [ "minor", "patch" ]
-    },
-    {
-      "description": "Prepare MR for major update minor of go modules",
-      "addLabels": [ "renovate/gomod" ],
-      "automerge": false,
-      "matchBaseBranches": [ "master" ],
-      "matchManagers": [ "gomod" ],
-      "matchUpdateTypes": [ "major" ]
-    }
-  ],
-  "postUpdateOptions": [
-    "gomodTidy"
-  ],
-  "rebaseLabel": "renovate/rebase",
-  "rebaseWhen": "behind-base-branch"
+  "extends": [
+    "local>volker.raschek/renovate-config:default#master",
+    "local>volker.raschek/renovate-config:container#master",
+    "local>volker.raschek/renovate-config:actions#master",
+    "local>volker.raschek/renovate-config:golang#master",
+    "local>volker.raschek/renovate-config:regexp#master"
+  ]
 }

socket/protocol.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"bytes"
 	"fmt"
+
 	"github.com/nlpodyssey/gopickle/pickle"
 )
 
@@ -62,7 +63,7 @@ func (s *Fail2BanSocket) read() (interface{}, error) {
 		if (module == "builtins" || module == "__builtin__") && name == "str" {
 			return &Py_builtins_str{}, nil
 		}
-		return nil, fmt.Errorf("class not found: " + module + " : " + name)
+		return nil, fmt.Errorf("class not found: %s: %s", module, name)
 	}
 
 	return unpickler.Load()