docs: update changelog for release

Merge branch 'chore/update-dependencies' into 'main'
chore: update dependencies See merge request hectorjsmith/fail2ban-prometheus-exporter!74
2023-03-16 20:35:56 +00:00 · 2023-03-16 18:05:22 +00:00 · 2023-03-16 18:05:22 +00:00 · 2022-10-13 08:36:43 +00:00 · 2022-10-13 08:36:43 +00:00 · 2022-09-18 20:38:46 +00:00
34 changed files with 3046 additions and 33 deletions
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@ -1,22 +1,69 @@
 image: golang:latest
 before_script:
  - make install-deps
 stages:
  - test
  - build
-format:
+.go_template:
-  stage: test
+  image: golang:latest
-  script:
+  before_script:
-    - make format
+    - make go/dependencies
 .docker_template:
  image: docker:stable
  services:
    - docker:dind
  before_script:
    - apk add git
    - apk add make
    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
 dependencies:
  extends: .go_template
  stage: test
  script:
-    - make go-mod-tidy
+    - make go/checkDependencies
 format:
  extends: .go_template
  stage: test
  script:
    - make go/checkFmt
 test:
  extends: .go_template
  stage: test
  script:
-    - make test
+    - make go/test
 build:
  extends: .go_template
  stage: build
  only:
    - main
    - tags
  script:
    - git fetch --tags
    - make build/snapshot
  artifacts:
    paths:
      - dist/*.tar.gz
      - dist/checksums.txt
    expire_in: 1 day
 docker/gitlab:
  extends: .docker_template
  stage: build
  only:
    - tags
  script:
    - make docker/build/latest
    - make docker/build/tag
    - docker push registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter
 docker/gitlab/nightly:
  extends: .docker_template
  stage: build
  only:
    - main
  script:
    - make docker/build/nightly
    - docker push registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter
--- a/.goreleaser.yml
+++ b/.goreleaser.yml
@ -0,0 +1,33 @@
 # This is an example goreleaser.yaml file with some sane defaults.
 # Make sure to check the documentation at http://goreleaser.com
 project_name: fail2ban_exporter
 before:
  hooks:
    - make go/dependencies
 builds:
  -
    binary: fail2ban_exporter
    dir: src
    goos:
      - linux
      - darwin
    goarch:
      - amd64
      - "386"
      - arm
      - arm64
    goarm:
      - "6"
      - "7"
 archives:
  -
    wrap_in_directory: true
    files:
    - LICENSE
    - README.md
    - CHANGELOG.md
 checksum:
  name_template: 'checksums.txt'
 changelog:
  skip: true
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -0,0 +1,130 @@
 # CHANGELOG
 All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog], and this project adheres to [Semantic Versioning].
 ## [Unreleased]
 *Nothing yet*
 ## [0.7.2] - 2023-03-16
 *Dependency updates*
 ## [0.7.1] - 2022-09-18
 ### Fixed
 - (04b84cc) fix: report failure when server fails to start ([#23](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/23))
 ## [0.7.0] - 2022-06-19
 ### Added
 - (fd58b20) feat: option to exit on socket conn error ([#21](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/21))
 ## [0.6.0] - 2022-02-20
 *Rewrite CLI flags and environment variables*
 ### Added
 - (23e073f) feat: add example systemd service file
 - (3911eca) feat: rename output binary and archives
 - (f6e328a) feat: correctly handle shutdown signals
 - (6e575aa) feat: rewrite cli flags and environment variables
 - (0f0efe5) feat: remove startup script from docker image
 - (e2902b8) feat: improve logging on startup
 - (1f27dac) feat: add default value for fail2ban socket path
 - (b7e317e) feat: configure tool using environment variables ([#17](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/17))
 - (6f76a03) feat: add support for basic auth ([#16](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/16))
 ### Fixed
 - (93da909) fix: use correct flag in dockerfile ([#18](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/18))
 ### BREAKING CHANGE
 - Release binary name has been changed to `fail2ban_exporter`.
 - Replace `--socket` flag with `--collector.f2b.socket`.
 - Merge `--port` flag and `--web.listen-address` into a single flag.
 - Remove `--collector.textfile` flag, its value is now derived from `--collector.textfile.directory`.
 - Remove `F2B_COLLECTOR_TEXT` and `F2B_WEB_PORT` environment variables.
 - Using the textfile collector in docker now requires setting environment variables.
 - CLI params now require two dashes instead of one (e.g. `--socket`).
 ## [0.5.0] - 2021-12-21
 *Remove deprecated code & support python2*
 ### Added
 - (b397a51) feat: sample grafana dashboard ([#15](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/15))
 - (c208c8e) feat: add listen address parameter - thanks [@private-creator](https://gitlab.com/private-creator)!
 ### Fixed
 - (7932ccb) fix: support python2 fail2ban ([#14](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/14)) - thanks [@private-creator](https://gitlab.com/private-creator)!
 ### BREAKING CHANGE
 - Remove `-db` CLI flag
 - Remove `f2b_errors{type="db"}` metric
 ## [0.4.0] - 2021-10-18
 *Add new fail2ban config metrics*
 ### Added
 - (56730c8) feat: add new jail config metrics
 - (5a107cc) feat: support for textfile metrics ([#13](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/13))
 ### Removed
 - (b268f86) remove: database-based metrics
 - (0b6a941) remove: windows builds
 ## [0.3.0] - 2021-09-27
 *Export new version metrics ([#12](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/12))*
 ### Added
 - (3c9a005) feat: render basic html page at root url
 - (22a165d) feat: improve startup logging
 - (fba9ee2) feat: export new version metric ([#12](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/12))
 ## [0.2.0] - 2021-08-31
 *Collect metrics through fail2ban socket - based on [#11](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/11)*
 ### Added
 - (39133d0) feat: collect new up metric from fail2ban socket
 - (4da46f3) feat: export metrics with socket errors
 - (bd841c3) feat: set up metric to 0 if errors found
 - (1964dde) feat: export metrics for failed/banned counts
 - (2ab1f7d) feat: support reading fail2ban socket in docker
 - (1282d63) feat: new metric for enabled jails ([#1](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/1))
 ### Fixed
 - (526b1c7) fix: update banned metrics to exclude expired bans ([#11](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/11))
 ### Deprecated
 - Use of the fail2ban database has been deprecated. The exporter now collects metrics through the fail2ban socket file. See [#11](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/-/issues/11) for more details.
 ## [0.1.0] - 2021-03-28
 *Initial release*
 ### Added
 - (6355c9e) feat: fail on startup if database file does not exist ([#8](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/8))
 - (4f18bf3) feat: add cli parameters for db path and metrics port ([#4](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/issues/4))
 - (91cba80) feat: export number of banned ips
 - (4b96501) feat: export bad ip count per jail
 - (0b40e5d) feat: connect to fail2ban db and extract total bad ips
 - (7ced846) feat: initial setup of metric exporter
 ### Fixed
 - (0842419) fix: compile tool without cgo_enabled flag
 ## 0.0.0 - 2021-02-05
 *Repository creation*
 ---
 [Keep a Changelog]: https://keepachangelog.com/en/1.0.0/
 [Semantic Versioning]: https://semver.org/spec/v2.0.0.html
 [Unreleased]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.7.1...main
 [0.1.0]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.0.0...0.1.0
 [0.2.0]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.1.0...0.2.0
 [0.3.0]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.2.0...0.3.0
 [0.4.0]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.3.0...0.4.0
 [0.5.0]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.4.0...0.5.0
 [0.6.0]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.5.0...0.6.0
 [0.7.0]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.6.0...0.7.0
 [0.7.1]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.7.0...0.7.1
 [0.7.2]: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/compare/0.7.1...0.7.2
--- a/23
+++ b/23
@ -0,0 +1,23 @@
 # Using golang:latest instead of alpine because of issues with sqlite3
 FROM golang:latest AS build
 # Create build folder to compile tool
 WORKDIR /build
 # Copy source files to build folder and link to the /go folder
 COPY . /build
 RUN ln -s /go/src/ /build/src
 # Compile the tool using a Make command
 RUN make build/docker
 FROM debian:buster-slim
 # Create main app folder to run from
 WORKDIR /app
 # Copy compiled binary to release image
 COPY --from=build /build/src/fail2ban_exporter /app/fail2ban_exporter
 ENTRYPOINT ["/app/fail2ban_exporter"]
--- a/46
+++ b/46
@ -1,15 +1,39 @@
-install-deps:
+go/dependencies:
-	go mod download
+	cd src/ && go mod download
 # Standard go test
 test:
 	go test ./... -v -race
 # Make sure no unnecessary dependencies are present
-go-mod-tidy:
+go/checkDependencies:
-	go mod tidy -v
+	cd src/ && go mod tidy -v
 	git diff-index --quiet HEAD
-format:
+# Standard go test
-	go fmt $(go list ./... | grep -v /vendor/)
+go/test:
-	go vet $(go list ./... | grep -v /vendor/)
+	cd src/ && go test ./... -v -race
 go/fmt:
 	cd src/ && go fmt ./...
 go/checkFmt:
 	test -z $(shell gofmt -l .)
 docs/genChangelog:
 	./tools/git-chglog_linux_amd64 --config tools/chglog/config.yml 0.0.0.. > CHANGELOG_gen.md
 build/snapshot:
 	./tools/goreleaser_linux_amd64 --snapshot --rm-dist --skip-publish
 build/release:
 	./tools/goreleaser_linux_amd64 --rm-dist --skip-publish
 build/docker:
 	cd src/ && go build -o fail2ban_exporter \
     -ldflags '-X main.version=$(shell git describe --tags) -X main.commit=${shell git rev-parse HEAD} -X "main.date=${shell date --rfc-3339=seconds}" -X main.builtBy=docker' exporter.go
 docker/build/latest:
 	docker build -t registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter:latest .
 docker/build/nightly:
 	docker build -t registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter:nightly .
 docker/build/tag:
 	docker build -t registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter:$(shell git describe --tags) .
--- a/README.md
+++ b/README.md
@ -1,3 +1,193 @@
 # Fail2Ban Prometheus Exporter
-Go tool to collect and export metrics on Fail2Ban
+[![Pipeline](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/badges/main/pipeline.svg)](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter)
 Collect metrics from a running fail2ban instance.
 ## Table of Contents
 1. Quick Start
 2. Metrics
 3. Configuration
 4. Building from source
 5. Textfile metrics
 ## 1. Quick Start
 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`.
 ```
 $ fail2ban_exporter --collector.f2b.socket=/var/run/fail2ban/fail2ban.sock --web.listen-address=":9191"
 2022/02/20 09:54:06 fail2ban exporter version 0.5.0
 2022/02/20 09:54:06 starting server at :9191
 2022/02/20 09:54:06 reading metrics from fail2ban socket: /var/run/fail2ban/fail2ban.sock
 2022/02/20 09:54:06 metrics available at '/metrics'
 2022/02/20 09:54:06 ready
 ```
 Binary files for each release can be found on the [releases](https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/-/releases) page.
 ### 1.2. Docker
 **Docker run**
 ```
 docker run -d \
    --name "fail2ban-exporter" \
    -v /var/run/fail2ban:/var/run/fail2ban:ro \
    -p "9191:9191" \
    registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter:latest
 ```
 **Docker compose**
 ```
 version: "2"
 services:
  exporter:
    image: registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter:latest
    volumes:
    - /var/run/fail2ban/:/var/run/fail2ban:ro
    ports:
    - "9191:9191"
 ```
 Use the `:latest` tag to get the latest stable release. Or use the `:nightly` tag for the latest (unstable) version.
 See the [registry 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) for more details.
 ## 2. Metrics
 The exporter exposes the following metrics:
 *All metric names are prefixed with `f2b_`*
 | Metric                       | Description                                                                        | Example                                             |
 |------------------------------|------------------------------------------------------------------------------------|-----------------------------------------------------|
 | `up`                         | Returns 1 if the exporter is up and running                                        | `f2b_up 1`                                          |
 | `errors`                     | Count the number of errors since startup by type                                   |                                                     |
 | `errors{type="socket_conn"}` | Errors connecting to the fail2ban socket (e.g. connection refused)                 | `f2b_errors{type="socket_conn"} 0`                  |
 | `errors{type="socket_req"}`  | Errors sending requests to the fail2ban server (e.g. invalid responses)            | `f2b_errors{type="socket_req"} 0`                   |
 | `jail_count`                 | Number of jails configured in fail2ban                                             | `f2b_jail_count 2`                                  |
 | `jail_banned_current`        | Number of IPs currently banned per jail                                            | `f2b_jail_banned_current{jail="sshd"} 15`           |
 | `jail_banned_total`          | Total number of banned IPs since fail2ban startup per jail (includes expired bans) | `f2b_jail_banned_total{jail="sshd"} 31`             |
 | `jail_failed_current`        | Number of current failures per jail                                                | `f2b_jail_failed_current{jail="sshd"} 6`            |
 | `jail_failed_total`          | Total number of failures since fail2ban startup per jail                           | `f2b_jail_failed_total{jail="sshd"} 125`            |
 | `jail_config_ban_time`       | How long an IP is banned for in this jail (in seconds)                             | `f2b_config_jail_ban_time{jail="sshd"} 600`         |
 | `jail_config_find_time`      | How far back the filter will look for failures in this jail (in seconds)           | `f2b_config_jail_find_time{jail="sshd"} 600`        |
 | `jail_config_max_retry`      | The max number of failures allowed before banning an IP in this jail               | `f2b_config_jail_max_retries{jail="sshd"} 5`        |
 | `version`                    | Version string of the exporter and fail2ban                                        | `f2b_version{exporter="0.5.0",fail2ban="0.11.1"} 1` |
 The metrics above correspond to the matching fields in the `fail2ban-client status <jail>` command:
 ```
 Status for the jail: sshd
 |- Filter
 |  |- Currently failed: 6
 |  |- Total failed:     125
 |  `- File list:        /var/log/auth.log
 `- Actions
   |- Currently banned: 15
   |- Total banned:     31
   `- Banned IP list:   ...
 ```
 ### 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 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.
 **CLI flags**
 ```
 usage: exporter [<flags>]
 Flags:
  -h, --help     Show context-sensitive help (also try --help-long and --help-man).
  -v, --version  show version info and exit
      --collector.f2b.socket="/var/run/fail2ban/fail2ban.sock"  
                 path to the fail2ban server socket
      --collector.textfile.directory=""  
                 directory to read text files with metrics from
      --web.listen-address=":9191"  
                 address to use for the metrics server
      --web.basic-auth.username=""  
                 username to use to protect endpoints with basic auth
      --web.basic-auth.password=""  
                 password to use to protect endpoints with basic auth
      --collector.f2b.exit-on-socket-connection-error  
                 when set to true the exporter will immediately exit on a fail2ban socket connection error
 ```
 **Environment variables**
 Each environment variable corresponds to a CLI flag.
 If both are specified, the CLI flag takes precedence.
 | Environment variable            | Corresponding CLI flag                            |
 |---------------------------------|---------------------------------------------------|
 | `F2B_COLLECTOR_SOCKET`          | `--collector.f2b.socket`                          |
 | `F2B_COLLECTOR_TEXT_PATH`       | `--collector.textfile.directory`                  |
 | `F2B_WEB_LISTEN_ADDRESS`        | `--web.listen-address`                            |
 | `F2B_WEB_BASICAUTH_USER`        | `--web.basic-auth.username`                       |
 | `F2B_WEB_BASICAUTH_PASS`        | `--web.basic-auth.password`                       |
 | `F2B_EXIT_ON_SOCKET_CONN_ERROR` | `--collector.f2b.exit-on-socket-connection-error` |
 ## 4. Building from source
 The simplest way to build the project is to run the `build/snapshot` make command.
 This will use `goreleaser` to build out binaries and archives for the project.
 Binaries are stored in the `dist/` folder.
 Alternatively, `go mod download` and `go build` can be used from the `src/` folder to build out the project.
 This will download dependencies and build the project.
 ## 5. Textfile metrics
 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.
 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:
 ```
 # HELP textfile_error Checks for errors while reading text files
 # TYPE textfile_error gauge
 textfile_error{path="file.prom"} 0
 ```
 **NOTE:** Any file not ending with `.prom` will be ignored.
 **Running in Docker**
 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
 *For example:*
 ```
 docker run -d \
    --name "fail2ban-exporter" \
    -v /var/run/fail2ban:/var/run/fail2ban:ro \
    -v /path/to/metrics:/app/metrics/:ro \
    -e F2B_COLLECTOR_TEXT_PATH=/app/metrics \
    -p "9191:9191" \
    registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter:latest
 ```
--- a/examples/grafana/dashboard.json
+++ b/examples/grafana/dashboard.json
@ -0,0 +1,877 @@
 {
  "__inputs": [
    {
      "name": "DS_PROMETHEUS",
      "label": "Prometheus",
      "description": "",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__elements": {},
  "__requires": [
    {
      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "9.1.8"
    },
    {
      "type": "datasource",
      "id": "prometheus",
      "name": "Prometheus",
      "version": "1.0.0"
    },
    {
      "type": "panel",
      "id": "table",
      "name": "Table",
      "version": ""
    },
    {
      "type": "panel",
      "id": "timeseries",
      "name": "Time series",
      "version": ""
    }
  ],
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": {
          "type": "datasource",
          "uid": "grafana"
        },
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "target": {
          "limit": 100,
          "matchAny": false,
          "tags": [],
          "type": "dashboard"
        },
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "fiscalYearStartMonth": 0,
  "graphTooltip": 2,
  "id": null,
  "links": [],
  "liveNow": false,
  "panels": [
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "custom": {
            "align": "auto",
            "displayMode": "auto",
            "inspect": false
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": [
          {
            "matcher": {
              "id": "byRegexp",
              "options": ".*Time"
            },
            "properties": [
              {
                "id": "unit",
                "value": "s"
              }
            ]
          }
        ]
      },
      "gridPos": {
        "h": 6,
        "w": 24,
        "x": 0,
        "y": 0
      },
      "id": 206,
      "options": {
        "footer": {
          "fields": "",
          "reducer": [
            "sum"
          ],
          "show": false
        },
        "showHeader": true
      },
      "pluginVersion": "9.1.8",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": false,
          "expr": "f2b_config_jail_max_retries{instance=~\"$instance\"}",
          "format": "table",
          "instant": true,
          "interval": "",
          "legendFormat": "{{jail}}",
          "refId": "A"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": false,
          "expr": "f2b_config_jail_ban_time{instance=~\"$instance\"}",
          "format": "table",
          "hide": false,
          "instant": true,
          "interval": "",
          "legendFormat": "{{jail}}",
          "refId": "B"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
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          "instant": true,
          "interval": "",
          "legendFormat": "{{jail}}",
          "refId": "C"
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      ],
      "title": "F2B Config",
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        {
          "id": "merge",
          "options": {}
        },
        {
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                "operation": "aggregate"
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      "datasource": {
        "type": "prometheus",
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              "mode": "off"
            }
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          "min": 0,
          "thresholds": {
            "mode": "absolute",
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              }
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        "h": 8,
        "w": 12,
        "x": 12,
        "y": 14
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      "id": 209,
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            "lastNotNull"
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          "editorMode": "code",
          "exemplar": true,
          "expr": "f2b_jail_banned_current{instance=~\"$instance\"}",
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          "legendFormat": "{{jail}} ({{instance}})",
          "range": true,
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      "title": "Fail2Ban Bans (Current)",
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      "type": "timeseries"
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        "type": "prometheus",
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        "w": 12,
        "x": 0,
        "y": 22
      },
      "id": 203,
      "options": {
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          "calcs": [
            "lastNotNull"
          ],
          "displayMode": "table",
          "placement": "right",
          "showLegend": true
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          "sort": "none"
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      "targets": [
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          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": true,
          "expr": "f2b_up{instance=~\"$instance\"}",
          "interval": "",
          "legendFormat": "Up ({{instance}})",
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Fail2Ban Up",
      "transparent": true,
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
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            "mode": "palette-classic"
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          "custom": {
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            "axisColorMode": "text",
            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
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              "tooltip": false,
              "viz": false
            },
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            "lineWidth": 1,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "never",
            "spanNulls": true,
            "stacking": {
              "group": "A",
              "mode": "none"
            },
            "thresholdsStyle": {
              "mode": "off"
            }
          },
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          "min": 0,
          "thresholds": {
            "mode": "absolute",
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                "color": "green",
                "value": null
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        "x": 12,
        "y": 22
      },
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            "lastNotNull"
          ],
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          "placement": "right",
          "showLegend": true
        },
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      "targets": [
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          "datasource": {
            "type": "prometheus",
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          },
          "editorMode": "code",
          "exemplar": true,
          "expr": "f2b_errors{instance=~\"$instance\"}",
          "interval": "",
          "legendFormat": "{{type}} ({{instance}})",
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Fail2Ban Exporter Errors",
      "transparent": true,
      "type": "timeseries"
    }
  ],
  "refresh": "30s",
  "schemaVersion": 37,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": [
      {
        "current": {
          "selected": false,
          "text": "Prometheus",
          "value": "Prometheus"
        },
        "hide": 0,
        "includeAll": false,
        "label": "Data Source",
        "multi": false,
        "name": "DataSource",
        "options": [],
        "query": "prometheus",
        "queryValue": "",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "type": "datasource"
      },
      {
        "current": {},
        "datasource": {
          "type": "prometheus",
          "uid": "${DS_PROMETHEUS}"
        },
        "definition": "f2b_up",
        "description": "Select which instance(s) to show",
        "hide": 0,
        "includeAll": false,
        "label": "Instance",
        "multi": true,
        "name": "instance",
        "options": [],
        "query": {
          "query": "f2b_up",
          "refId": "StandardVariableQuery"
        },
        "refresh": 1,
        "regex": "/.*instance=\"([^\"]+)\"/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
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  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "",
  "title": "F2B",
  "uid": "cTkH9AT7z",
  "version": 3,
  "weekStart": ""
 }
--- a/examples/systemd/README.md
+++ b/examples/systemd/README.md
@ -0,0 +1,7 @@
 # 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.
 The `ExecStart` line can be modified to add any custom CLI flags.
--- a/examples/systemd/fail2ban_exporter.service
+++ b/examples/systemd/fail2ban_exporter.service
@ -0,0 +1,9 @@
 [Unit]
 Description=Fail2Ban Exporter
 [Service]
 User=fail2ban_exporter
 ExecStart=/usr/sbin/fail2ban_exporter
 [Install]
 WantedBy=multi-user.target
--- a/exporter.go
+++ b/exporter.go
@ -1,7 +0,0 @@
 package main
 import "log"
 func main() {
 	log.Println("Not yet implemented")
 }
--- a/go.mod
+++ b/go.mod
@ -1,3 +0,0 @@
 module fail2ban-prometheus-exporter
 go 1.15
--- a/go.sum
+++ b/go.sum
--- a/src/auth/hash.go
+++ b/src/auth/hash.go
@ -0,0 +1,18 @@
 package auth
 import (
 	"crypto/sha256"
 	"encoding/hex"
 )
 func Hash(data []byte) []byte {
 	if len(data) == 0 {
 		return []byte{}
 	}
 	b := sha256.Sum256(data)
 	return b[:]
 }
 func HashString(data string) string {
 	return hex.EncodeToString(Hash([]byte(data)))
 }
--- a/src/auth/hash_test.go
+++ b/src/auth/hash_test.go
@ -0,0 +1,26 @@
 package auth
 import (
 	"reflect"
 	"testing"
 )
 func TestHashString(t *testing.T) {
 	tests := []struct {
 		name string
 		args string
 		want string
 	}{
 		{"Happy path #1", "123", "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3"},
 		{"Happy path #2", "hello world", "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"},
 		{"Happy path #3", "H3Ll0_W0RLD", "d58a27fe9a6e73a1d8a67189fb8acace047e7a1a795276a0056d3717ad61bd0e"},
 		{"Blank string", "", ""},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			if got := HashString(tt.args); !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("HashString() = %v, want %v", got, tt.want)
 			}
 		})
 	}
 }
--- a/src/auth/middleware.go
+++ b/src/auth/middleware.go
@ -0,0 +1,31 @@
 package auth
 import (
 	"net/http"
 )
 type BasicAuthProvider interface {
 	Enabled() bool
 	DoesBasicAuthMatch(username, password string) bool
 }
 func BasicAuthMiddleware(handlerFunc http.HandlerFunc, basicAuthProvider BasicAuthProvider) http.HandlerFunc {
 	if basicAuthProvider.Enabled() {
 		return func(w http.ResponseWriter, r *http.Request) {
 			if doesBasicAuthMatch(r, basicAuthProvider) {
 				handlerFunc.ServeHTTP(w, r)
 			} else {
 				w.WriteHeader(http.StatusUnauthorized)
 			}
 		}
 	}
 	return handlerFunc
 }
 func doesBasicAuthMatch(r *http.Request, basicAuthProvider BasicAuthProvider) bool {
 	rawUsername, rawPassword, ok := r.BasicAuth()
 	if ok {
 		return basicAuthProvider.DoesBasicAuthMatch(rawUsername, rawPassword)
 	}
 	return false
 }
--- a/src/auth/middleware_test.go
+++ b/src/auth/middleware_test.go
@ -0,0 +1,58 @@
 package auth
 import (
 	"net/http"
 	"net/http/httptest"
 	"testing"
 )
 type testAuthProvider struct {
 	enabled bool
 	match   bool
 }
 func (p testAuthProvider) Enabled() bool {
 	return p.enabled
 }
 func (p testAuthProvider) DoesBasicAuthMatch(username, password string) bool {
 	return p.match
 }
 func newTestRequest() *http.Request {
 	return httptest.NewRequest(http.MethodGet, "http://example.com", nil)
 }
 func executeBasicAuthMiddlewareTest(t *testing.T, authEnabled bool, authMatches bool, expectedCode int, expectedCallCount int) {
 	callCount := 0
 	testHandler := func(w http.ResponseWriter, r *http.Request) {
 		callCount++
 	}
 	handler := BasicAuthMiddleware(testHandler, testAuthProvider{enabled: authEnabled, match: authMatches})
 	recorder := httptest.NewRecorder()
 	request := newTestRequest()
 	if authEnabled {
 		request.SetBasicAuth("test", "test")
 	}
 	handler.ServeHTTP(recorder, request)
 	if recorder.Code != expectedCode {
 		t.Errorf("statusCode = %v, want %v", recorder.Code, expectedCode)
 	}
 	if callCount != expectedCallCount {
 		t.Errorf("callCount = %v, want %v", callCount, expectedCallCount)
 	}
 }
 func Test_GIVEN_DisabledBasicAuth_WHEN_MethodCalled_THEN_RequestProcessed(t *testing.T) {
 	executeBasicAuthMiddlewareTest(t, false, false, http.StatusOK, 1)
 }
 func Test_GIVEN_EnabledBasicAuth_WHEN_MethodCalledWithCorrectCredentials_THEN_RequestProcessed(t *testing.T) {
 	executeBasicAuthMiddlewareTest(t, true, true, http.StatusOK, 1)
 }
 func Test_GIVEN_EnabledBasicAuth_WHEN_MethodCalledWithIncorrectCredentials_THEN_RequestRejected(t *testing.T) {
 	executeBasicAuthMiddlewareTest(t, true, false, http.StatusUnauthorized, 0)
 }
--- a/src/cfg/basicAuth.go
+++ b/src/cfg/basicAuth.go
@ -0,0 +1,25 @@
 package cfg
 import "gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/auth"
 type hashedBasicAuth struct {
 	username string
 	password string
 }
 func newHashedBasicAuth(rawUsername, rawPassword string) *hashedBasicAuth {
 	return &hashedBasicAuth{
 		username: auth.HashString(rawUsername),
 		password: auth.HashString(rawPassword),
 	}
 }
 func (p *hashedBasicAuth) Enabled() bool {
 	return len(p.username) > 0 && len(p.password) > 0
 }
 func (p *hashedBasicAuth) DoesBasicAuthMatch(rawUsername, rawPassword string) bool {
 	username := auth.HashString(rawUsername)
 	password := auth.HashString(rawPassword)
 	return username == p.username && password == p.password
 }
--- a/src/cfg/basicAuth_test.go
+++ b/src/cfg/basicAuth_test.go
@ -0,0 +1,60 @@
 package cfg
 import "testing"
 func Test_hashedBasicAuth_DoesBasicAuthMatch(t *testing.T) {
 	type args struct {
 		username string
 		password string
 	}
 	type fields struct {
 		username string
 		password string
 	}
 	tests := []struct {
 		name   string
 		fields fields
 		args   args
 		want   bool
 	}{
 		{"Happy test #1", fields{username: "1234", password: "1234"}, args{username: "1234", password: "1234"}, true},
 		{"Happy test #2", fields{username: "test", password: "1234"}, args{username: "test", password: "1234"}, true},
 		{"Happy test #3", fields{username: "TEST", password: "1234"}, args{username: "TEST", password: "1234"}, true},
 		{"Non match #1", fields{username: "test", password: "1234"}, args{username: "1234", password: "1234"}, false},
 		{"Non match #2", fields{username: "1234", password: "test"}, args{username: "1234", password: "1234"}, false},
 		{"Non match #3", fields{username: "1234", password: "test"}, args{username: "1234", password: "TEST"}, false},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			basicAuth := newHashedBasicAuth(tt.fields.username, tt.fields.password)
 			if got := basicAuth.DoesBasicAuthMatch(tt.args.username, tt.args.password); got != tt.want {
 				t.Errorf("DoesBasicAuthMatch() = %v, want %v", got, tt.want)
 			}
 		})
 	}
 }
 func Test_hashedBasicAuth_Enabled(t *testing.T) {
 	type fields struct {
 		username string
 		password string
 	}
 	tests := []struct {
 		name   string
 		fields fields
 		want   bool
 	}{
 		{"Both blank", fields{username: "", password: ""}, false},
 		{"Single blank #1", fields{username: "test", password: ""}, false},
 		{"Single blank #1", fields{username: "", password: "test"}, false},
 		{"Both populated", fields{username: "test", password: "test"}, true},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			basicAuth := newHashedBasicAuth(tt.fields.username, tt.fields.password)
 			if got := basicAuth.Enabled(); got != tt.want {
 				t.Errorf("Enabled() = %v, want %v", got, tt.want)
 			}
 		})
 	}
 }
--- a/src/cfg/cfg.go
+++ b/src/cfg/cfg.go
@ -0,0 +1,109 @@
 package cfg
 import (
 	"fmt"
 	"github.com/alecthomas/kingpin/v2"
 	"os"
 )
 const (
 	socketEnvName                = "F2B_COLLECTOR_SOCKET"
 	fileCollectorPathEnvName     = "F2B_COLLECTOR_TEXT_PATH"
 	addressEnvName               = "F2B_WEB_LISTEN_ADDRESS"
 	basicAuthUserEnvName         = "F2B_WEB_BASICAUTH_USER"
 	basicAuthPassEnvName         = "F2B_WEB_BASICAUTH_PASS"
 	exitOnSocketConnErrorEnvName = "F2B_EXIT_ON_SOCKET_CONN_ERROR"
 )
 type AppSettings struct {
 	VersionMode           bool
 	MetricsAddress        string
 	Fail2BanSocketPath    string
 	FileCollectorPath     string
 	BasicAuthProvider     *hashedBasicAuth
 	ExitOnSocketConnError bool
 }
 func init() {
 	kingpin.HelpFlag.Short('h')
 }
 func Parse() *AppSettings {
 	settings := &AppSettings{}
 	readParamsFromCli(settings)
 	settings.validateFlags()
 	return settings
 }
 func readParamsFromCli(settings *AppSettings) {
 	versionMode := kingpin.
 		Flag("version", "show version info and exit").
 		Short('v').
 		Default("false").
 		Bool()
 	socketPath := kingpin.
 		Flag("collector.f2b.socket", "path to the fail2ban server socket").
 		Default("/var/run/fail2ban/fail2ban.sock").
 		Envar(socketEnvName).
 		String()
 	fileCollectorPath := kingpin.
 		Flag("collector.textfile.directory", "directory to read text files with metrics from").
 		Default("").
 		Envar(fileCollectorPathEnvName).
 		String()
 	address := kingpin.
 		Flag("web.listen-address", "address to use for the metrics server").
 		Default(":9191").
 		Envar(addressEnvName).
 		String()
 	rawBasicAuthUsername := kingpin.
 		Flag("web.basic-auth.username", "username to use to protect endpoints with basic auth").
 		Default("").
 		Envar(basicAuthUserEnvName).
 		String()
 	rawBasicAuthPassword := kingpin.
 		Flag("web.basic-auth.password", "password to use to protect endpoints with basic auth").
 		Default("").
 		Envar(basicAuthPassEnvName).
 		String()
 	rawExitOnSocketConnError := kingpin.
 		Flag("collector.f2b.exit-on-socket-connection-error", "when set to true the exporter will immediately exit on a fail2ban socket connection error").
 		Default("false").
 		Envar(exitOnSocketConnErrorEnvName).
 		Bool()
 	kingpin.Parse()
 	settings.VersionMode = *versionMode
 	settings.MetricsAddress = *address
 	settings.Fail2BanSocketPath = *socketPath
 	settings.FileCollectorPath = *fileCollectorPath
 	settings.setBasicAuthValues(*rawBasicAuthUsername, *rawBasicAuthPassword)
 	settings.ExitOnSocketConnError = *rawExitOnSocketConnError
 }
 func (settings *AppSettings) setBasicAuthValues(rawUsername, rawPassword string) {
 	settings.BasicAuthProvider = newHashedBasicAuth(rawUsername, rawPassword)
 }
 func (settings *AppSettings) validateFlags() {
 	var flagsValid = true
 	if !settings.VersionMode {
 		if settings.Fail2BanSocketPath == "" {
 			fmt.Println("error: fail2ban socket path must not be blank")
 			flagsValid = false
 		}
 		if settings.MetricsAddress == "" {
 			fmt.Println("error: invalid server address, must not be blank")
 			flagsValid = false
 		}
 		if (len(settings.BasicAuthProvider.username) > 0) != (len(settings.BasicAuthProvider.password) > 0) {
 			fmt.Println("error: to enable basic auth both the username and the password must be provided")
 			flagsValid = false
 		}
 	}
 	if !flagsValid {
 		kingpin.Usage()
 		os.Exit(1)
 	}
 }
--- a/src/collector/f2b/collector.go
+++ b/src/collector/f2b/collector.go
@ -0,0 +1,60 @@
 package f2b
 import (
 	"github.com/prometheus/client_golang/prometheus"
 	"gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/cfg"
 	"gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/socket"
 	"log"
 	"os"
 )
 type Collector struct {
 	socketPath                 string
 	exporterVersion            string
 	lastError                  error
 	socketConnectionErrorCount int
 	socketRequestErrorCount    int
 	exitOnSocketConnError      bool
 }
 func NewExporter(appSettings *cfg.AppSettings, exporterVersion string) *Collector {
 	log.Printf("reading metrics from fail2ban socket: %s", appSettings.Fail2BanSocketPath)
 	return &Collector{
 		socketPath:                 appSettings.Fail2BanSocketPath,
 		exporterVersion:            exporterVersion,
 		lastError:                  nil,
 		socketConnectionErrorCount: 0,
 		socketRequestErrorCount:    0,
 		exitOnSocketConnError:      appSettings.ExitOnSocketConnError,
 	}
 }
 func (c *Collector) Describe(ch chan<- *prometheus.Desc) {
 	ch <- metricServerUp
 	ch <- metricJailCount
 	ch <- metricJailFailedCurrent
 	ch <- metricJailFailedTotal
 	ch <- metricJailBannedCurrent
 	ch <- metricJailBannedTotal
 	ch <- metricErrorCount
 }
 func (c *Collector) Collect(ch chan<- prometheus.Metric) {
 	s, err := socket.ConnectToSocket(c.socketPath)
 	if err != nil {
 		log.Printf("error opening socket: %v", err)
 		c.socketConnectionErrorCount++
 		if c.exitOnSocketConnError {
 			os.Exit(1)
 		}
 	} else {
 		defer s.Close()
 	}
 	c.collectServerUpMetric(ch, s)
 	if err == nil && s != nil {
 		c.collectJailMetrics(ch, s)
 		c.collectVersionMetric(ch, s)
 	}
 	c.collectErrorCountMetric(ch)
 }
--- a/src/collector/f2b/socket.go
+++ b/src/collector/f2b/socket.go
@ -0,0 +1,179 @@
 package f2b
 import (
 	"github.com/prometheus/client_golang/prometheus"
 	"gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/socket"
 	"log"
 )
 const (
 	namespace = "f2b"
 )
 var (
 	metricErrorCount = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "errors"),
 		"Number of errors found since startup",
 		[]string{"type"}, nil,
 	)
 	metricServerUp = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "up"),
 		"Check if the fail2ban server is up",
 		nil, nil,
 	)
 	metricJailCount = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "jail_count"),
 		"Number of defined jails",
 		nil, nil,
 	)
 	metricJailFailedCurrent = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "jail_failed_current"),
 		"Number of current failures on this jail's filter",
 		[]string{"jail"}, nil,
 	)
 	metricJailFailedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "jail_failed_total"),
 		"Number of total failures on this jail's filter",
 		[]string{"jail"}, nil,
 	)
 	metricJailBannedCurrent = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "jail_banned_current"),
 		"Number of IPs currently banned in this jail",
 		[]string{"jail"}, nil,
 	)
 	metricJailBannedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "jail_banned_total"),
 		"Total number of IPs banned by this jail (includes expired bans)",
 		[]string{"jail"}, nil,
 	)
 	metricJailBanTime = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "config", "jail_ban_time"),
 		"How long an IP is banned for in this jail (in seconds)",
 		[]string{"jail"}, nil,
 	)
 	metricJailFindTime = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "config", "jail_find_time"),
 		"How far back will the filter look for failures in this jail (in seconds)",
 		[]string{"jail"}, nil,
 	)
 	metricJailMaxRetry = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "config", "jail_max_retries"),
 		"The number of failures allowed until the IP is banned by this jail",
 		[]string{"jail"}, nil,
 	)
 	metricVersionInfo = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "version"),
 		"Version of the exporter and fail2ban server",
 		[]string{"exporter", "fail2ban"}, nil,
 	)
 )
 func (c *Collector) collectErrorCountMetric(ch chan<- prometheus.Metric) {
 	ch <- prometheus.MustNewConstMetric(
 		metricErrorCount, prometheus.CounterValue, float64(c.socketConnectionErrorCount), "socket_conn",
 	)
 	ch <- prometheus.MustNewConstMetric(
 		metricErrorCount, prometheus.CounterValue, float64(c.socketRequestErrorCount), "socket_req",
 	)
 }
 func (c *Collector) collectServerUpMetric(ch chan<- prometheus.Metric, s *socket.Fail2BanSocket) {
 	var serverUp float64 = 0
 	if s != nil {
 		pingSuccess, err := s.Ping()
 		if err != nil {
 			c.socketRequestErrorCount++
 			log.Print(err)
 		}
 		if err == nil && pingSuccess {
 			serverUp = 1
 		}
 	}
 	ch <- prometheus.MustNewConstMetric(
 		metricServerUp, prometheus.GaugeValue, serverUp,
 	)
 }
 func (c *Collector) collectJailMetrics(ch chan<- prometheus.Metric, s *socket.Fail2BanSocket) {
 	jails, err := s.GetJails()
 	var count float64 = 0
 	if err != nil {
 		c.socketRequestErrorCount++
 		log.Print(err)
 	}
 	if err == nil {
 		count = float64(len(jails))
 	}
 	ch <- prometheus.MustNewConstMetric(
 		metricJailCount, prometheus.GaugeValue, count,
 	)
 	for i := range jails {
 		c.collectJailStatsMetric(ch, s, jails[i])
 		c.collectJailConfigMetrics(ch, s, jails[i])
 	}
 }
 func (c *Collector) collectJailStatsMetric(ch chan<- prometheus.Metric, s *socket.Fail2BanSocket, jail string) {
 	stats, err := s.GetJailStats(jail)
 	if err != nil {
 		c.socketRequestErrorCount++
 		log.Printf("failed to get stats for jail %s: %v", jail, err)
 		return
 	}
 	ch <- prometheus.MustNewConstMetric(
 		metricJailFailedCurrent, prometheus.GaugeValue, float64(stats.FailedCurrent), jail,
 	)
 	ch <- prometheus.MustNewConstMetric(
 		metricJailFailedTotal, prometheus.GaugeValue, float64(stats.FailedTotal), jail,
 	)
 	ch <- prometheus.MustNewConstMetric(
 		metricJailBannedCurrent, prometheus.GaugeValue, float64(stats.BannedCurrent), jail,
 	)
 	ch <- prometheus.MustNewConstMetric(
 		metricJailBannedTotal, prometheus.GaugeValue, float64(stats.BannedTotal), jail,
 	)
 }
 func (c *Collector) collectJailConfigMetrics(ch chan<- prometheus.Metric, s *socket.Fail2BanSocket, jail string) {
 	banTime, err := s.GetJailBanTime(jail)
 	if err != nil {
 		c.socketRequestErrorCount++
 		log.Printf("failed to get ban time for jail %s: %v", jail, err)
 	} else {
 		ch <- prometheus.MustNewConstMetric(
 			metricJailBanTime, prometheus.GaugeValue, float64(banTime), jail,
 		)
 	}
 	findTime, err := s.GetJailFindTime(jail)
 	if err != nil {
 		c.socketRequestErrorCount++
 		log.Printf("failed to get find time for jail %s: %v", jail, err)
 	} else {
 		ch <- prometheus.MustNewConstMetric(
 			metricJailFindTime, prometheus.GaugeValue, float64(findTime), jail,
 		)
 	}
 	maxRetry, err := s.GetJailMaxRetries(jail)
 	if err != nil {
 		c.socketRequestErrorCount++
 		log.Printf("failed to get max retries for jail %s: %v", jail, err)
 	} else {
 		ch <- prometheus.MustNewConstMetric(
 			metricJailMaxRetry, prometheus.GaugeValue, float64(maxRetry), jail,
 		)
 	}
 }
 func (c *Collector) collectVersionMetric(ch chan<- prometheus.Metric, s *socket.Fail2BanSocket) {
 	fail2banVersion, err := s.GetServerVersion()
 	if err != nil {
 		c.socketRequestErrorCount++
 		log.Printf("failed to get fail2ban server version: %v", err)
 	}
 	ch <- prometheus.MustNewConstMetric(
 		metricVersionInfo, prometheus.GaugeValue, float64(1), c.exporterVersion, fail2banVersion,
 	)
 }
--- a/src/collector/textfile/collector.go
+++ b/src/collector/textfile/collector.go
@ -0,0 +1,48 @@
 package textfile
 import (
 	"github.com/prometheus/client_golang/prometheus"
 	"gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/cfg"
 	"log"
 )
 type Collector struct {
 	enabled    bool
 	folderPath string
 	fileMap    map[string]*fileData
 }
 type fileData struct {
 	readErrors   int
 	fileName     string
 	fileContents []byte
 }
 func NewCollector(appSettings *cfg.AppSettings) *Collector {
 	collector := &Collector{
 		enabled:    appSettings.FileCollectorPath != "",
 		folderPath: appSettings.FileCollectorPath,
 		fileMap:    make(map[string]*fileData),
 	}
 	if collector.enabled {
 		log.Printf("reading textfile metrics from: %s", collector.folderPath)
 	}
 	return collector
 }
 func (c *Collector) Describe(ch chan<- *prometheus.Desc) {
 	if c.enabled {
 		ch <- metricReadError
 	}
 }
 func (c *Collector) Collect(ch chan<- prometheus.Metric) {
 	if c.enabled {
 		c.collectFileContents()
 		c.collectFileErrors(ch)
 	}
 }
 func (c *Collector) appendErrorForPath(path string) {
 	c.fileMap[path].readErrors++
 }
--- a/src/collector/textfile/file.go
+++ b/src/collector/textfile/file.go
@ -0,0 +1,55 @@
 package textfile
 import (
 	"github.com/prometheus/client_golang/prometheus"
 	"io/ioutil"
 	"log"
 	"path/filepath"
 	"strings"
 )
 const namespace = "textfile"
 var (
 	metricReadError = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "error"),
 		"Checks for errors while reading text files",
 		[]string{"path"}, nil,
 	)
 )
 func (c *Collector) collectFileContents() {
 	files, err := ioutil.ReadDir(c.folderPath)
 	if err != nil {
 		log.Printf("error reading directory '%s': %v", c.folderPath, err)
 		return
 	}
 	for _, file := range files {
 		fileName := file.Name()
 		if !strings.HasSuffix(strings.ToLower(fileName), ".prom") {
 			continue
 		}
 		c.fileMap[fileName] = &fileData{
 			readErrors: 0,
 			fileName:   fileName,
 		}
 		fullPath := filepath.Join(c.folderPath, fileName)
 		content, err := ioutil.ReadFile(fullPath)
 		if err != nil {
 			c.appendErrorForPath(fileName)
 			log.Printf("error reading contents of file '%s': %v", fileName, err)
 		}
 		c.fileMap[fileName].fileContents = content
 	}
 }
 func (c *Collector) collectFileErrors(ch chan<- prometheus.Metric) {
 	for _, f := range c.fileMap {
 		ch <- prometheus.MustNewConstMetric(
 			metricReadError, prometheus.GaugeValue, float64(f.readErrors), f.fileName,
 		)
 	}
 }
--- a/src/collector/textfile/writer.go
+++ b/src/collector/textfile/writer.go
@ -0,0 +1,20 @@
 package textfile
 import (
 	"log"
 	"net/http"
 )
 func (c *Collector) WriteTextFileMetrics(w http.ResponseWriter, r *http.Request) {
 	if !c.enabled {
 		return
 	}
 	for _, f := range c.fileMap {
 		_, err := w.Write(f.fileContents)
 		if err != nil {
 			c.appendErrorForPath(f.fileName)
 			log.Printf("error writing file contents to response writer '%s': %v", f.fileName, err)
 		}
 	}
 }
--- a/src/exporter.go
+++ b/src/exporter.go
@ -0,0 +1,103 @@
 package main
 import (
 	"fmt"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/auth"
 	"gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/cfg"
 	"gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/collector/f2b"
 	"gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/collector/textfile"
 	"log"
 	"net/http"
 	"os"
 	"os/signal"
 	"syscall"
 )
 const (
 	metricsPath = "/metrics"
 )
 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)
 }
 func rootHtmlHandler(w http.ResponseWriter, r *http.Request) {
 	_, err := w.Write([]byte(
 		`<html>
 			<head><title>Fail2Ban Exporter</title></head>
 			<body>
 			<h1>Fail2Ban Exporter</h1>
 			<p><a href="` + metricsPath + `">Metrics</a></p>
 			</body>
 		</html>`))
 	if err != nil {
 		log.Printf("error handling root url: %v", err)
 		w.WriteHeader(http.StatusInternalServerError)
 	}
 }
 func metricHandler(w http.ResponseWriter, r *http.Request, collector *textfile.Collector) {
 	promhttp.Handler().ServeHTTP(w, r)
 	collector.WriteTextFileMetrics(w, r)
 }
 func main() {
 	appSettings := cfg.Parse()
 	if appSettings.VersionMode {
 		printAppVersion()
 	} else {
 		handleGracefulShutdown()
 		log.Printf("fail2ban exporter version %s", version)
 		log.Printf("starting server at %s", appSettings.MetricsAddress)
 		f2bCollector := f2b.NewExporter(appSettings, version)
 		prometheus.MustRegister(f2bCollector)
 		textFileCollector := textfile.NewCollector(appSettings)
 		prometheus.MustRegister(textFileCollector)
 		http.HandleFunc("/", auth.BasicAuthMiddleware(rootHtmlHandler, appSettings.BasicAuthProvider))
 		http.HandleFunc(metricsPath, auth.BasicAuthMiddleware(
 			func(w http.ResponseWriter, r *http.Request) {
 				metricHandler(w, r, textFileCollector)
 			},
 			appSettings.BasicAuthProvider,
 		))
 		log.Printf("metrics available at '%s'", metricsPath)
 		if appSettings.BasicAuthProvider.Enabled() {
 			log.Printf("basic auth enabled")
 		}
 		svrErr := make(chan error)
 		go func() {
 			svrErr <- http.ListenAndServe(appSettings.MetricsAddress, nil)
 		}()
 		log.Print("ready")
 		err := <-svrErr
 		log.Fatal(err)
 	}
 }
 func handleGracefulShutdown() {
 	var signals = make(chan os.Signal)
 	signal.Notify(signals, syscall.SIGTERM)
 	signal.Notify(signals, syscall.SIGINT)
 	go func() {
 		sig := <-signals
 		log.Printf("caught signal: %+v", sig)
 		os.Exit(0)
 	}()
 }
--- a/src/go.mod
+++ b/src/go.mod
@ -0,0 +1,16 @@
 module gitlab.com/hectorjsmith/fail2ban-prometheus-exporter
 go 1.15
 require (
 	github.com/alecthomas/kingpin/v2 v2.3.2
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/kisielk/og-rek v1.2.0
 	github.com/nlpodyssey/gopickle v0.2.0
 	github.com/prometheus/client_golang v1.14.0
 	github.com/prometheus/common v0.42.0 // indirect
 	github.com/prometheus/procfs v0.9.0 // indirect
 	golang.org/x/sys v0.6.0 // indirect
 	google.golang.org/protobuf v1.30.0 // indirect
 )
--- a/src/go.sum
+++ b/src/go.sum
@ -0,0 +1,536 @@
 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=
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--- a/src/socket/decoder.go
+++ b/src/socket/decoder.go
@ -0,0 +1,8 @@
 package socket
 // Py_builtins_str is used by the pickle decoder to parse the server response into a format Go can understand
 type Py_builtins_str struct{}
 func (c Py_builtins_str) Call(args ...interface{}) (interface{}, error) {
 	return args[0], nil
 }
--- a/src/socket/fail2banSocket.go
+++ b/src/socket/fail2banSocket.go
@ -0,0 +1,179 @@
 package socket
 import (
 	"fmt"
 	"github.com/kisielk/og-rek"
 	"github.com/nlpodyssey/gopickle/types"
 	"net"
 	"strings"
 )
 type Fail2BanSocket struct {
 	socket  net.Conn
 	encoder *ogórek.Encoder
 }
 type JailStats struct {
 	FailedCurrent int
 	FailedTotal   int
 	BannedCurrent int
 	BannedTotal   int
 }
 func ConnectToSocket(path string) (*Fail2BanSocket, error) {
 	c, err := net.Dial("unix", path)
 	if err != nil {
 		return nil, err
 	}
 	return &Fail2BanSocket{
 		socket:  c,
 		encoder: ogórek.NewEncoder(c),
 	}, nil
 }
 func (s *Fail2BanSocket) Close() error {
 	return s.socket.Close()
 }
 func (s *Fail2BanSocket) Ping() (bool, error) {
 	response, err := s.sendCommand([]string{pingCommand, "100"})
 	if err != nil {
 		return false, newConnectionError(pingCommand, err)
 	}
 	if t, ok := response.(*types.Tuple); ok {
 		if (*t)[1] == "pong" {
 			return true, nil
 		}
 		return false, fmt.Errorf("unexpected response data (expecting 'pong'): %s", (*t)[1])
 	}
 	return false, newBadFormatError(pingCommand, response)
 }
 func (s *Fail2BanSocket) GetJails() ([]string, error) {
 	response, err := s.sendCommand([]string{statusCommand})
 	if err != nil {
 		return nil, err
 	}
 	if lvl1, ok := response.(*types.Tuple); ok {
 		if lvl2, ok := lvl1.Get(1).(*types.List); ok {
 			if lvl3, ok := lvl2.Get(1).(*types.Tuple); ok {
 				if lvl4, ok := lvl3.Get(1).(string); ok {
 					splitJails := strings.Split(lvl4, ",")
 					return trimSpaceForAll(splitJails), nil
 				}
 			}
 		}
 	}
 	return nil, newBadFormatError(statusCommand, response)
 }
 func (s *Fail2BanSocket) GetJailStats(jail string) (JailStats, error) {
 	response, err := s.sendCommand([]string{statusCommand, jail})
 	if err != nil {
 		return JailStats{}, err
 	}
 	stats := JailStats{
 		FailedCurrent: -1,
 		FailedTotal:   -1,
 		BannedCurrent: -1,
 		BannedTotal:   -1,
 	}
 	if lvl1, ok := response.(*types.Tuple); ok {
 		if lvl2, ok := lvl1.Get(1).(*types.List); ok {
 			if filter, ok := lvl2.Get(0).(*types.Tuple); ok {
 				if filterLvl1, ok := filter.Get(1).(*types.List); ok {
 					if filterCurrentTuple, ok := filterLvl1.Get(0).(*types.Tuple); ok {
 						if filterCurrent, ok := filterCurrentTuple.Get(1).(int); ok {
 							stats.FailedCurrent = filterCurrent
 						}
 					}
 					if filterTotalTuple, ok := filterLvl1.Get(1).(*types.Tuple); ok {
 						if filterTotal, ok := filterTotalTuple.Get(1).(int); ok {
 							stats.FailedTotal = filterTotal
 						}
 					}
 				}
 			}
 			if actions, ok := lvl2.Get(1).(*types.Tuple); ok {
 				if actionsLvl1, ok := actions.Get(1).(*types.List); ok {
 					if actionsCurrentTuple, ok := actionsLvl1.Get(0).(*types.Tuple); ok {
 						if actionsCurrent, ok := actionsCurrentTuple.Get(1).(int); ok {
 							stats.BannedCurrent = actionsCurrent
 						}
 					}
 					if actionsTotalTuple, ok := actionsLvl1.Get(1).(*types.Tuple); ok {
 						if actionsTotal, ok := actionsTotalTuple.Get(1).(int); ok {
 							stats.BannedTotal = actionsTotal
 						}
 					}
 				}
 			}
 			return stats, nil
 		}
 	}
 	return stats, newBadFormatError(statusCommand, response)
 }
 func (s *Fail2BanSocket) GetJailBanTime(jail string) (int, error) {
 	command := fmt.Sprintf(banTimeCommandFmt, jail)
 	return s.sendSimpleIntCommand(command)
 }
 func (s *Fail2BanSocket) GetJailFindTime(jail string) (int, error) {
 	command := fmt.Sprintf(findTimeCommandFmt, jail)
 	return s.sendSimpleIntCommand(command)
 }
 func (s *Fail2BanSocket) GetJailMaxRetries(jail string) (int, error) {
 	command := fmt.Sprintf(maxRetriesCommandFmt, jail)
 	return s.sendSimpleIntCommand(command)
 }
 func (s *Fail2BanSocket) GetServerVersion() (string, error) {
 	response, err := s.sendCommand([]string{versionCommand})
 	if err != nil {
 		return "", err
 	}
 	if lvl1, ok := response.(*types.Tuple); ok {
 		if versionStr, ok := lvl1.Get(1).(string); ok {
 			return versionStr, nil
 		}
 	}
 	return "", newBadFormatError(versionCommand, response)
 }
 // sendSimpleIntCommand sends a command to the fail2ban socket and parses the response to extract an int.
 // This command assumes that the response data is in the format of `(d, d)` where `d` is a number.
 func (s *Fail2BanSocket) sendSimpleIntCommand(command string) (int, error) {
 	response, err := s.sendCommand(strings.Split(command, " "))
 	if err != nil {
 		return -1, err
 	}
 	if lvl1, ok := response.(*types.Tuple); ok {
 		if banTime, ok := lvl1.Get(1).(int); ok {
 			return banTime, nil
 		}
 	}
 	return -1, newBadFormatError(command, response)
 }
 func newBadFormatError(command string, data interface{}) error {
 	return fmt.Errorf("(%s) unexpected response format - cannot parse: %v", command, data)
 }
 func newConnectionError(command string, err error) error {
 	return fmt.Errorf("(%s) failed to send command through socket: %v", command, err)
 }
 func trimSpaceForAll(slice []string) []string {
 	for i := range slice {
 		slice[i] = strings.TrimSpace(slice[i])
 	}
 	return slice
 }
--- a/src/socket/protocol.go
+++ b/src/socket/protocol.go
@ -0,0 +1,69 @@
 package socket
 import (
 	"bufio"
 	"bytes"
 	"fmt"
 	"github.com/nlpodyssey/gopickle/pickle"
 )
 const (
 	commandTerminator    = "<F2B_END_COMMAND>"
 	pingCommand          = "ping"
 	statusCommand        = "status"
 	versionCommand       = "version"
 	banTimeCommandFmt    = "get %s bantime"
 	findTimeCommandFmt   = "get %s findtime"
 	maxRetriesCommandFmt = "get %s maxretry"
 	socketReadBufferSize = 1024
 )
 func (s *Fail2BanSocket) sendCommand(command []string) (interface{}, error) {
 	err := s.write(command)
 	if err != nil {
 		return nil, err
 	}
 	return s.read()
 }
 func (s *Fail2BanSocket) write(command []string) error {
 	err := s.encoder.Encode(command)
 	if err != nil {
 		return err
 	}
 	_, err = s.socket.Write([]byte(commandTerminator))
 	if err != nil {
 		return err
 	}
 	return nil
 }
 func (s *Fail2BanSocket) read() (interface{}, error) {
 	reader := bufio.NewReader(s.socket)
 	data := []byte{}
 	for {
 		buf := make([]byte, socketReadBufferSize)
 		_, err := reader.Read(buf)
 		if err != nil {
 			return nil, err
 		}
 		data = append(data, buf...)
 		containsTerminator := bytes.Contains(data, []byte(commandTerminator))
 		if containsTerminator {
 			break
 		}
 	}
 	bufReader := bytes.NewReader(data)
 	unpickler := pickle.NewUnpickler(bufReader)
 	unpickler.FindClass = func(module, name string) (interface{}, error) {
 		if (module == "builtins" || module == "__builtin__") && name == "str" {
 			return &Py_builtins_str{}, nil
 		}
 		return nil, fmt.Errorf("class not found: " + module + " : " + name)
 	}
 	return unpickler.Load()
 }
--- a/tools/chglog/CHANGELOG.tpl.md
+++ b/tools/chglog/CHANGELOG.tpl.md
@ -0,0 +1,60 @@
 # CHANGELOG
 All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog], and this project adheres to [Semantic Versioning].
 {{ if .Versions -}}
 ## [Unreleased]
 {{- if .Unreleased.CommitGroups }}
 {{ template "commits" .Unreleased.CommitGroups }}
 {{- end -}}
 {{- if .Unreleased.NoteGroups -}}
 {{ template "notes" .Unreleased.NoteGroups }}
 {{- end -}}
 {{- end -}}
 {{ range .Versions -}}
 ## {{ if .Tag.Previous }}[{{ .Tag.Name }}]{{ else }}{{ .Tag.Name }}{{ end }} - {{ datetime "2006-01-02" .Tag.Date }}
 {{ template "commits" .CommitGroups }}
 {{- if .NoteGroups -}}
 {{ template "notes" .NoteGroups }}
 {{- end -}}
 {{ end }}
 ---
 *This changelog is automatically generated by [git-chglog]*
 [Keep a Changelog]: https://keepachangelog.com/en/1.0.0/
 [Semantic Versioning]: https://semver.org/spec/v2.0.0.html
 [git-chglog]: https://github.com/git-chglog/git-chglog
 {{- if .Versions }}
 [Unreleased]: {{ .Info.RepositoryURL }}/compare/{{ $latest := index .Versions 0 }}{{ $latest.Tag.Name }}...main
 {{ range .Versions -}}
 {{ if .Tag.Previous -}}
 [{{ .Tag.Name }}]: {{ $.Info.RepositoryURL }}/compare/{{ .Tag.Previous.Name }}...{{ .Tag.Name }}
 {{ end -}}
 {{ end -}}
 {{ end -}}
 {{- define "notes" }}
 {{- range . -}}
 ### {{ .Title }}
 {{ range .Notes -}}
 - {{ .Body }}
 {{ end }}
 {{ end }}
 {{ end -}}
 {{- define "commits" }}
 {{- range . -}}
 {{ if or (eq .RawTitle "feat") (eq .RawTitle "fix") }}
 ### {{ .Title }}
 {{ range .Commits -}}
 - ({{ .Hash.Short }}) {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Header }}
 {{ end }}
 {{ end -}}
 {{ end -}}
 {{ end -}}
--- a/tools/chglog/config.yml
+++ b/tools/chglog/config.yml
@ -0,0 +1,23 @@
 style: gitlab
 template: CHANGELOG.tpl.md
 info:
  title: CHANGELOG
  repository_url: https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter
 options:
  commit_groups:
    title_maps:
      feat: Added
      fix: Fixed
      revert: Reverted
  header:
    pattern: "^(\\w*)\\:\\s(.*)$"
    pattern_maps:
      - Type
      - Subject
  notes:
    keywords:
      - BREAKING CHANGE
      - Changed
      - Deprecated
      - Removed
      - Security
--- a/tools/git-chglog_linux_amd64
+++ b/tools/git-chglog_linux_amd64
--- a/tools/goreleaser_linux_amd64
+++ b/tools/goreleaser_linux_amd64
		`@ -1,3 +0,0 @@`
			`module fail2ban-prometheus-exporter`

			`go 1.15`