From 05b137283bf04f93f6df2f48563eee1227fc380a Mon Sep 17 00:00:00 2001
From: Ansgar Schulte <1299623+ansgarschulte@users.noreply.github.com>
Date: Wed, 10 Jul 2024 12:05:20 +0200
Subject: [PATCH] build: add linux packages build

---
 .dockerignore                                 |  4 +
 .github/workflows/ci.yml                      |  7 +-
 .gitignore                                    |  4 +
 .goreleaser.yaml                              | 83 ++++++++++++++++
 Dockerfile                                    | 22 +----
 Makefile                                      | 10 +-
 go.mod                                        |  6 +-
 go.sum                                        |  8 ++
 .../steadybit-extension-prometheus            |  8 ++
 .../config/steadybit/extension-prometheus     |  3 +
 .../extensions.d/extension-prometheus.yaml    |  4 +
 .../init.d/steadybit-extension-prometheus     | 99 +++++++++++++++++++
 linuxpkg/scripts/postinstall.sh               | 85 ++++++++++++++++
 linuxpkg/scripts/postremove.sh                | 49 +++++++++
 linuxpkg/scripts/preinstall.sh                | 11 +++
 linuxpkg/scripts/preremove.sh                 | 43 ++++++++
 .../steadybit-extension-prometheus.service    | 18 ++++
 17 files changed, 440 insertions(+), 24 deletions(-)
 create mode 100644 .dockerignore
 create mode 100644 .goreleaser.yaml
 create mode 100644 linuxpkg/config/logrotate.d/steadybit-extension-prometheus
 create mode 100644 linuxpkg/config/steadybit/extension-prometheus
 create mode 100644 linuxpkg/config/steadybit/extensions.d/extension-prometheus.yaml
 create mode 100755 linuxpkg/init.d/steadybit-extension-prometheus
 create mode 100755 linuxpkg/scripts/postinstall.sh
 create mode 100755 linuxpkg/scripts/postremove.sh
 create mode 100755 linuxpkg/scripts/preinstall.sh
 create mode 100755 linuxpkg/scripts/preremove.sh
 create mode 100644 linuxpkg/systemd/steadybit-extension-prometheus.service

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..8c4b460
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,4 @@
+/dist
+/coverageout
+/.idea
+*.iml
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1f46d5f..7084774 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,10 +19,15 @@ jobs:
     uses: steadybit/extension-kit/.github/workflows/reusable-extension-ci.yml@main
     with:
       go_version: '1.22'
-      build_linux_packages: false
+      build_linux_packages: true
       VERSION_BUMPER_APPID: ${{ vars.GH_APP_STEADYBIT_APP_ID }}
     secrets:
       SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
       PAT_TOKEN_EXTENSION_DEPLOYER: ${{ secrets.PAT_TOKEN_EXTENSION_DEPLOYER }}
+      MAVEN_GPG_PRIVATE_KEY: ${{ secrets.MAVEN_GPG_PRIVATE_KEY }}
+      MAVEN_GPG_PRIVATE_KEY_PASSWORD: ${{ secrets.MAVEN_GPG_PRIVATE_KEY_PASSWORD }}
+      PAT_TOKEN_GORELEASER: ${{ secrets.PAT_TOKEN }}
+      STEADYBIT_ARTIFACT_SERVER_USERNAME: ${{ secrets.STEADYBIT_ARTIFACT_SERVER_USERNAME }}
+      STEADYBIT_ARTIFACT_SERVER_PASSWORD: ${{ secrets.STEADYBIT_ARTIFACT_SERVER_PASSWORD }}
       SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
       VERSION_BUMPER_SECRET: ${{ secrets.GH_APP_STEADYBIT_PRIVATE_KEY }}
diff --git a/.gitignore b/.gitignore
index 47cc671..07c7d34 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,7 @@ extension-prometheus.iml
 /e2e/e2e-coverage-docker.out
 /licenses
 /snyk.sarif
+/gpg.key
+/dist
+/extension
+
diff --git a/.goreleaser.yaml b/.goreleaser.yaml
new file mode 100644
index 0000000..5e0dd70
--- /dev/null
+++ b/.goreleaser.yaml
@@ -0,0 +1,83 @@
+project_name: steadybit-extension-prometheus
+version: 2
+before:
+  hooks:
+    - go mod download
+    - make licenses-report
+
+release:
+  prerelease: "false"
+
+git:
+  ignore_tags:
+    - steadybit-extension-prometheus-*
+
+builds:
+  - binary: extension-prometheus
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+    goarch:
+      - amd64
+      - arm64
+    flags:
+      - -cover={{ if index .Env "BUILD_WITH_COVERAGE"  }}{{ .Env.BUILD_WITH_COVERAGE }}{{ else }}false{{ end }}
+      - -covermode=atomic
+    ldflags:
+      - -s -w
+      - -X github.com/steadybit/extension-kit/extbuild.ExtensionName={{.ProjectName}}
+      - -X github.com/steadybit/extension-kit/extbuild.Version={{.Version}}
+      - -X github.com/steadybit/extension-kit/extbuild.Revision={{.Commit}}
+
+archives:
+  - name_template: "{{ .ProjectName }}_{{ .Os }}_{{ .Arch }}"
+
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ incpatch .Version }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+
+nfpms:
+  - package_name: "steadybit-extension-prometheus"
+    file_name_template: "{{ .ConventionalFileName }}"
+    formats:
+      - deb
+      - rpm
+    maintainer: "Johannes Edmeier <johannes.edmeier@steadybit.com>"
+    description: |
+      Steadybit Extension Prometheus
+    vendor: "steadybit GmbH"
+    homepage: "https://steadybit.com"
+    license: "Steadybit license"
+    builds:
+      - steadybit-extension-prometheus
+    bindir: /opt/steadybit/extension-prometheus
+    contents:
+      - src: ./linuxpkg/systemd
+        dst: /usr/lib/systemd/system
+      - src: ./linuxpkg/init.d
+        dst: /etc/init.d
+      - src: ./linuxpkg/config
+        dst: /etc
+        type: config
+      - src: ./licenses
+        dst: /opt/steadybit/extension-prometheus/licenses
+    scripts:
+      preinstall: ./linuxpkg/scripts/preinstall.sh
+      postinstall: ./linuxpkg/scripts/postinstall.sh
+      preremove: ./linuxpkg/scripts/preremove.sh
+      postremove: ./linuxpkg/scripts/postremove.sh
+
+    rpm:
+      signature:
+        key_file: ./gpg.key
+    deb:
+      signature:
+        key_file: ./gpg.key
diff --git a/Dockerfile b/Dockerfile
index 9673645..28633ce 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,33 +3,22 @@
 ##
 ## Build
 ##
-FROM --platform=$BUILDPLATFORM golang:1.22-alpine AS build
+FROM --platform=$BUILDPLATFORM goreleaser/goreleaser:v2.0.1 AS build
 
 ARG TARGETOS TARGETARCH
-ARG NAME
-ARG VERSION
-ARG REVISION
-ARG ADDITIONAL_BUILD_PARAMS
+ARG BUILD_WITH_COVERAGE
+ARG BUILD_SNAPSHOT=true
 ARG SKIP_LICENSES_REPORT=false
 
 WORKDIR /app
 
-RUN apk add build-base
 COPY go.mod ./
 COPY go.sum ./
 RUN go mod download
 
 COPY . .
 
-RUN GOOS=$TARGETOS GOARCH=$TARGETARCH go build \
-    -ldflags="\
-    -X 'github.com/steadybit/extension-kit/extbuild.ExtensionName=${NAME}' \
-    -X 'github.com/steadybit/extension-kit/extbuild.Version=${VERSION}' \
-    -X 'github.com/steadybit/extension-kit/extbuild.Revision=${REVISION}'" \
-    -o ./extension \
-    ${ADDITIONAL_BUILD_PARAMS}
-RUN make licenses-report
-
+RUN GOOS=$TARGETOS GOARCH=$TARGETARCH goreleaser build --snapshot="${BUILD_SNAPSHOT}" --single-target -o extension
 ##
 ## Runtime
 ##
@@ -49,7 +38,6 @@ WORKDIR /
 COPY --from=build /app/extension /extension
 COPY --from=build /app/licenses /licenses
 
-EXPOSE 8087
-EXPOSE 8088
+EXPOSE 8087 8088
 
 ENTRYPOINT ["/extension"]
diff --git a/Makefile b/Makefile
index 600bdc2..2517631 100755
--- a/Makefile
+++ b/Makefile
@@ -73,8 +73,7 @@ chart-bump-version:
 ## build: build the extension
 .PHONY: build
 build:
-	go mod verify
-	go build -o=./extension
+	goreleaser build --clean --snapshot --single-target -o extension
 
 ## run: run the extension
 .PHONY: run
@@ -84,4 +83,9 @@ run: tidy build
 ## container: build the container image
 .PHONY: container
 container:
-	docker build --build-arg ADDITIONAL_BUILD_PARAMS="-cover -covermode=atomic" --build-arg SKIP_LICENSES_REPORT="true" -t extension-prometheus:latest .
+	docker buildx build --build-arg BUILD_WITH_COVERAGE="true" -t extension-prometheus:latest --output=type=docker .
+
+## linuxpkg: build the linux packages
+.PHONY: linuxpkg
+linuxpkg:
+	goreleaser release --clean --snapshot --skip=sign
diff --git a/go.mod b/go.mod
index 5b1913f..c063fb0 100644
--- a/go.mod
+++ b/go.mod
@@ -49,7 +49,7 @@ require (
 	github.com/elastic/go-windows v1.0.1 // indirect
 	github.com/emicklei/go-restful/v3 v3.11.0 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/getkin/kin-openapi v0.125.0 // indirect
+	github.com/getkin/kin-openapi v0.126.0 // indirect
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-ole/go-ole v1.2.6 // indirect
@@ -112,11 +112,11 @@ require (
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
 	golang.org/x/crypto v0.24.0 // indirect
-	golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 // indirect
+	golang.org/x/exp v0.0.0-20240707233637-46b078467d37 // indirect
 	golang.org/x/net v0.26.0 // indirect
 	golang.org/x/oauth2 v0.21.0 // indirect
 	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.21.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
 	golang.org/x/term v0.21.0 // indirect
 	golang.org/x/text v0.16.0 // indirect
 	golang.org/x/time v0.5.0 // indirect
diff --git a/go.sum b/go.sum
index 07fe98d..1c53f80 100644
--- a/go.sum
+++ b/go.sum
@@ -24,6 +24,7 @@ github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cilium/ebpf v0.15.0 h1:7NxJhNiBT3NG8pZJ3c+yfrVdHY8ScgKD27sScgjLMMk=
 github.com/cilium/ebpf v0.15.0/go.mod h1:DHp1WyrLeiBh19Cf/tfiSMhqheEiK8fXFZ4No0P1Hso=
+github.com/containerd/cgroups v1.1.0 h1:v8rEWFl6EoqHB+swVNjVoCJE8o3jX7e8nqBGPLaDFBM=
 github.com/containerd/cgroups/v3 v3.0.3 h1:S5ByHZ/h9PMe5IOQoN7E+nMc2UcLEM/V48DGDJ9kip0=
 github.com/containerd/cgroups/v3 v3.0.3/go.mod h1:8HBe7V3aWGLFPd/k03swSIsGjZhHI2WzJmticMgVuz0=
 github.com/containerd/containerd v1.7.18 h1:jqjZTQNfXGoEaZdW1WwPU0RqSn1Bm2Ay/KJPUuO8nao=
@@ -60,6 +61,8 @@ github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2
 github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/getkin/kin-openapi v0.125.0 h1:jyQCyf2qXS1qvs2U00xQzkGCqYPhEhZDmSmVt65fXno=
 github.com/getkin/kin-openapi v0.125.0/go.mod h1:wb1aSZA/iWmorQP9KTAS/phLj/t17B5jT7+fS8ed9NM=
+github.com/getkin/kin-openapi v0.126.0 h1:c2cSgLnAsS0xYfKsgt5oBV6MYRM/giU8/RtwUY4wyfY=
+github.com/getkin/kin-openapi v0.126.0/go.mod h1:7mONz8IwmSRg6RttPu6v8U/OJ+gr+J99qSFNjPGSQqw=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
 github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
@@ -312,6 +315,8 @@ golang.org/x/crypto v0.24.0 h1:mnl8DM0o513X8fdIkmyFE/5hTYxbwYOjDS/+rK6qpRI=
 golang.org/x/crypto v0.24.0/go.mod h1:Z1PMYSOR5nyMcyAVAIQSKCDwalqy85Aqn1x3Ws4L5DM=
 golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 h1:yixxcjnhBmY0nkL253HFVIm0JsFHwrHdT3Yh6szTnfY=
 golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8/go.mod h1:jj3sYF3dwk5D+ghuXyeI3r5MFf+NT2An6/9dOA95KSI=
+golang.org/x/exp v0.0.0-20240707233637-46b078467d37 h1:uLDX+AfeFCct3a2C7uIWBKMJIR3CJMhcgfrUAqjRK6w=
+golang.org/x/exp v0.0.0-20240707233637-46b078467d37/go.mod h1:M4RDyNAINzryxdtnbRXRL/OHtkFuWGRjvuhBJpk2IlY=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
@@ -360,6 +365,8 @@ golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
 golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
@@ -387,6 +394,7 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.22.0 h1:gqSGLZqv+AI9lIQzniJ0nZDRG5GBPsSi+DRNHWNz6yA=
 golang.org/x/tools v0.22.0/go.mod h1:aCwcsjqvq7Yqt6TNyX7QMU2enbQ/Gt0bo6krSeEri+c=
+golang.org/x/tools v0.23.0 h1:SGsXPZ+2l4JsgaCKkx+FQ9YZ5XEtA1GZYuoDjenLjvg=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/linuxpkg/config/logrotate.d/steadybit-extension-prometheus b/linuxpkg/config/logrotate.d/steadybit-extension-prometheus
new file mode 100644
index 0000000..5935737
--- /dev/null
+++ b/linuxpkg/config/logrotate.d/steadybit-extension-prometheus
@@ -0,0 +1,8 @@
+/var/log/steadybit-extension-prometheus.log {
+    copytruncate
+    size 10m
+    create 700 steadybit steadybit
+    dateext
+    rotate 5
+    compress
+}
diff --git a/linuxpkg/config/steadybit/extension-prometheus b/linuxpkg/config/steadybit/extension-prometheus
new file mode 100644
index 0000000..5448056
--- /dev/null
+++ b/linuxpkg/config/steadybit/extension-prometheus
@@ -0,0 +1,3 @@
+STEADYBIT_LOG_LEVEL=info
+STEADYBIT_LOG_FORMAT=text
+STEADYBIT_EXTENSION_UNIX_SOCKET=/run/steadybit/extension-prometheus.sock
diff --git a/linuxpkg/config/steadybit/extensions.d/extension-prometheus.yaml b/linuxpkg/config/steadybit/extensions.d/extension-prometheus.yaml
new file mode 100644
index 0000000..3885203
--- /dev/null
+++ b/linuxpkg/config/steadybit/extensions.d/extension-prometheus.yaml
@@ -0,0 +1,4 @@
+unixSocket: /run/steadybit/extension-prometheus.sock
+types:
+  - ACTION
+  - DISCOVERY
diff --git a/linuxpkg/init.d/steadybit-extension-prometheus b/linuxpkg/init.d/steadybit-extension-prometheus
new file mode 100755
index 0000000..22cf8d3
--- /dev/null
+++ b/linuxpkg/init.d/steadybit-extension-prometheus
@@ -0,0 +1,99 @@
+#!/bin/sh
+#
+# Copyright 2024 steadybit GmbH. All rights reserved.
+#
+
+### BEGIN INIT INFO
+# Provides:          steadybit-extension-prometheus
+# Required-Start:    $local_fs $network $named $time $syslog
+# Required-Stop:     $local_fs $network $named $time $syslog
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Description:       Steadybit Extension Prometheus
+# chkconfig:         2345 99 01
+### END INIT INFO
+
+SCRIPT=/opt/steadybit/extension-prometheus/extension-prometheus
+RUNAS=steadybit
+
+PIDFILE=/var/run/steadybit-extension-prometheus.pid
+LOGFILE=/var/log/steadybit-extension-prometheus.log
+ENVFILE=/etc/steadybit/extension-prometheus
+
+start() {
+  if [ -f "$PIDFILE" ] && kill -0 "$(cat "$PIDFILE")"; then
+    echo 'Service already running' >&2
+    return 1
+  fi
+  echo 'Starting service...' >&2
+
+  if [ ! -e "$LOGFILE" ]; then
+    touch "$LOGFILE"
+    if [ -n "$RUNAS" ]; then
+      chown "$RUNAS" "$LOGFILE"
+    fi
+  fi
+
+  if [ -f "$ENVFILE" ]; then
+    export $(grep -v "^#" "$ENVFILE" | xargs)
+  fi
+
+  su -s /bin/sh -c "$SCRIPT > \"$LOGFILE\" 2>&1 & echo \$!" $RUNAS >"$PIDFILE"
+  PID=$(cat "$PIDFILE")
+  sleep 1
+
+  if [ -z "$PID" ] || ! kill -0 "$PID" 2>/dev/null; then
+    echo "Service failed to start" >&2
+    tail -n 10 "$LOGFILE"
+    return 1
+  fi
+  echo 'Service started' >&2
+}
+
+stop() {
+  if [ ! -f "$PIDFILE" ] || ! kill -0 "$(cat "$PIDFILE")" 2>/dev/null; then
+    echo 'Service not running' >&2
+    return 1
+  fi
+  echo 'Stopping service...' >&2
+  kill -15 "$(cat "$PIDFILE")" && rm -f "$PIDFILE"
+  echo 'Service stopped' >&2
+}
+
+status() {
+  if [ ! -f "$PIDFILE" ]; then
+    echo 'Service not running'. >&2
+    return 3
+  fi
+  PID=$(cat "$PIDFILE")
+  if ! kill -0 "$PID" 2>/dev/null; then
+    echo "Service not running: process $PID not found." >&2
+    return 1
+  fi
+
+  echo 'Service running'. >&2
+  return 0
+}
+
+case "$1" in
+start)
+  start
+  ;;
+status)
+  status
+  ;;
+stop)
+  stop
+  ;;
+force-reload)
+  stop
+  start
+  ;;
+restart)
+  stop
+  start
+  ;;
+*)
+  echo "Usage: $0 {start|stop|status|restart}"
+  ;;
+esac
diff --git a/linuxpkg/scripts/postinstall.sh b/linuxpkg/scripts/postinstall.sh
new file mode 100755
index 0000000..984b20b
--- /dev/null
+++ b/linuxpkg/scripts/postinstall.sh
@@ -0,0 +1,85 @@
+#!/bin/sh -e
+
+#
+# Copyright 2024 steadybit GmbH. All rights reserved.
+#
+service_name="steadybit-extension-prometheus"
+env_file="/etc/steadybit/extension-prometheus"
+
+# decide if we should use SystemD or init/upstart
+use_systemctl="True"
+if ! command -V systemctl >/dev/null 2>&1; then
+  use_systemctl="False"
+fi
+
+cleanup() {
+  # remove files that were not needed on this platform / system
+  if [ "${use_systemctl}" = "False" ]; then
+    rm -f "/usr/lib/systemd/system/$service_name.service"
+  else
+    rm -f "/etc/chkconfig/$service_name"
+    rm -f "/etc/init.d/$service_name"
+  fi
+}
+
+cleanInstall() {
+  if [ -n "$STEADYBIT_LOG_LEVEL" ]; then
+    sed -i "s/^STEADYBIT_LOG_LEVEL=.*/STEADYBIT_LOG_LEVEL=$(echo "$STEADYBIT_LOG_LEVEL" | sed 's,/,\\/,g')/" "$env_file"
+  fi
+
+  # enable the service in the proper way for this platform
+  if [ "${use_systemctl}" = "False" ]; then
+    if command -V chkconfig >/dev/null 2>&1; then
+      chkconfig --add "$service_name"
+    fi
+
+    service "$service_name" restart || :
+  else
+    systemctl daemon-reload || :
+    systemctl unmask "$service_name" || :
+    systemctl preset "$service_name" || :
+    systemctl enable "$service_name" || :
+    systemctl restart "$service_name" || :
+  fi
+
+}
+
+upgrade() {
+  if [ "${use_systemctl}" = "False" ]; then
+    if service "$service_name" status 2>/dev/null; then
+      service "$service_name" restart || :
+    fi
+  else
+    systemctl daemon-reload
+    if systemctl is-active --quiet "$service_name"; then
+      systemctl restart "$service_name" || :
+    else
+      systemctl start "$service_name" || :
+    fi
+  fi
+}
+
+#check if this is a clean install or an upgrade
+action="$1"
+if [ "$1" = "configure" ] && [ -z "$2" ]; then
+  # Alpine linux does not pass args, and deb passes $1=configure
+  action="install"
+elif [ "$1" = "configure" ] && [ -n "$2" ]; then
+  # deb passes $1=configure $2=<current version>
+  action="upgrade"
+fi
+
+case "$action" in
+"1" | "install")
+  cleanInstall
+  ;;
+"2" | "upgrade")
+  upgrade
+  ;;
+*)
+  # $1 == version being installed on Alpine
+  cleanInstall
+  ;;
+esac
+
+cleanup
diff --git a/linuxpkg/scripts/postremove.sh b/linuxpkg/scripts/postremove.sh
new file mode 100755
index 0000000..4196b33
--- /dev/null
+++ b/linuxpkg/scripts/postremove.sh
@@ -0,0 +1,49 @@
+#!/bin/sh -e
+
+#
+# Copyright 2024 steadybit GmbH. All rights reserved.
+#
+
+service_name="steadybit-extension-prometheus"
+# decide if we should use SystemD or init/upstart
+use_systemctl="True"
+if ! command -V systemctl >/dev/null 2>&1; then
+  use_systemctl="False"
+fi
+
+remove() {
+  if [ "${use_systemctl}" = "True" ]; then
+    systemctl mask "$service_name" || :
+  fi
+}
+
+purge() {
+  if [ "${use_systemctl}" = "True" ]; then
+    if systemctl is-enabled --quiet "$service_name"; then
+      systemctl disable "$service_name" || :
+    fi
+    systemctl unmask "$service_name" || :
+  fi
+}
+
+upgrade() {
+  :
+}
+
+action="$1"
+
+case "$action" in
+"0" | "purge")
+  purge
+  ;;
+"remove")
+  remove
+  ;;
+"1" | "upgrade")
+  upgrade
+  ;;
+*)
+  # $1 == version being installed on Alpine
+  remove
+  ;;
+esac
diff --git a/linuxpkg/scripts/preinstall.sh b/linuxpkg/scripts/preinstall.sh
new file mode 100755
index 0000000..9a187fb
--- /dev/null
+++ b/linuxpkg/scripts/preinstall.sh
@@ -0,0 +1,11 @@
+#!/bin/sh -e
+
+#
+# Copyright 2024 steadybit GmbH. All rights reserved.
+#
+
+if ! getent passwd steadybit >/dev/null 2>&1; then
+  useradd --system steadybit
+  printf "created user: steadybit\n"
+fi
+
diff --git a/linuxpkg/scripts/preremove.sh b/linuxpkg/scripts/preremove.sh
new file mode 100755
index 0000000..1c0ec20
--- /dev/null
+++ b/linuxpkg/scripts/preremove.sh
@@ -0,0 +1,43 @@
+#!/bin/sh -e
+
+#
+# Copyright 2024 steadybit GmbH. All rights reserved.
+#
+
+service_name="steadybit-extension-prometheus"
+# decide if we should use SystemD or init/upstart
+use_systemctl="True"
+if ! command -V systemctl >/dev/null 2>&1; then
+  use_systemctl="False"
+fi
+
+remove() {
+  if [ "${use_systemctl}" = "False" ]; then
+    if service "$service_name" status 2>/dev/null; then
+      service "$service_name" stop || :
+    fi
+  else
+    if systemctl is-active --quiet "$service_name"; then
+      systemctl stop "$service_name" || :
+    fi
+  fi
+}
+
+upgrade() {
+  :
+}
+
+action="$1"
+
+case "$action" in
+"0" | "remove")
+  remove
+  ;;
+"1" | "upgrade")
+  upgrade
+  ;;
+*)
+  # $1 == version being installed on Alpine
+  remove
+  ;;
+esac
diff --git a/linuxpkg/systemd/steadybit-extension-prometheus.service b/linuxpkg/systemd/steadybit-extension-prometheus.service
new file mode 100644
index 0000000..cbdcf2e
--- /dev/null
+++ b/linuxpkg/systemd/steadybit-extension-prometheus.service
@@ -0,0 +1,18 @@
+[Unit]
+Description="steadybit extension prometheus"
+After=syslog.target
+
+[Service]
+Type=simple
+ExecStart=/opt/steadybit/extension-prometheus/extension-prometheus
+EnvironmentFile=/etc/steadybit/extension-prometheus
+User=steadybit
+Group=steadybit
+SuccessExitStatus=0 143
+Restart=on-failure
+RestartSec=5s
+StandardOutput=append:/var/log/steadybit-extension-prometheus.log
+StandardError=append:/var/log/steadybit-extension-prometheus.log
+
+[Install]
+WantedBy=multi-user.target