feat: Docker support

.github/workflows/docker.yml

@@ -0,0 +1,60 @@
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
+name: Docker Image
+
+on:
+  push:
+    paths:
+      - 'docker/**'
+
+  pull_request:
+    paths:
+      - 'docker/**'
+
+  release:
+    types: [ published ]
+
+jobs:
+  docker:
+    name: Build & Push Docker Image
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Extract Image Metadata
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=semver,pattern={{major}}.{{minor}}.{{patch}},value=${{ github.event.release.tag_name }}
+            type=semver,pattern={{major}}.{{minor}},value=${{ github.event.release.tag_name }}
+            type=semver,pattern={{major}},value=${{ github.event.release.tag_name }}
+
+      - name: Login to GHCR
+        if: github.event_name == 'release'
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build & Push Image
+        uses: docker/build-push-action@v2
+        with:
+          context: ./docker
+          push: ${{ github.event_name == 'release' }}
+          no-cache: true
+          build-args: |
+            REPOSITORY=${{ github.repository }}
+            ${{ github.event.release.tag_name && format('RELEASE_TAG={0}', github.event.release.tag_name) }}
+          platforms: linux/arm/v7,linux/arm64,linux/amd64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

CHANGELOG.md

@@ -8,6 +8,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Docker support! Image name is `ghcr.io/recyclarr/recyclarr`. See the [Docker] wiki page for more
+  information.
+
+[Docker]: https://github.com/recyclarr/recyclarr/wiki/Docker
+
 ## [2.1.2] - 2022-05-29
 
 ### Fixed

debugging/docker-compose.yml

@@ -1,5 +1,9 @@
 version: '3'
 
+networks:
+  recyclarr:
+    name: recyclarr
+
 volumes:
   radarr1:
   radarr2:
@@ -8,7 +12,10 @@ volumes:
 services:
   radarr1:
     image: ghcr.io/hotio/radarr
-    network_mode: bridge
+    networks:
+      recyclarr:
+        aliases:
+          - radarr1
     ports:
       - 7878:7878
     volumes:
@@ -19,7 +26,10 @@ services:
 
   radarr2:
     image: ghcr.io/hotio/radarr:nightly
-    network_mode: bridge
+    networks:
+      recyclarr:
+        aliases:
+          - radarr2
     ports:
       - 6767:7878
     volumes:
@@ -29,7 +39,10 @@ services:
 
   sonarr1:
     image: ghcr.io/hotio/sonarr:nightly
-    network_mode: bridge
+    networks:
+      recyclarr:
+        aliases:
+          - sonarr1
     ports:
       - 8989:8989
     volumes:

docker/.gitignore

@@ -0,0 +1 @@
+/config/

docker/Dockerfile

@@ -0,0 +1,54 @@
+FROM mcr.microsoft.com/dotnet/sdk:6.0-alpine AS build
+
+WORKDIR /build
+
+ARG RELEASE_TAG=latest
+ARG TARGETPLATFORM
+ARG REPOSITORY=recyclarr/recyclarr
+
+RUN apk add unzip
+
+RUN set -ex; \
+    \
+    # The download path is a bit different when using the latest release instead of a specific
+    # release
+    if [ "$RELEASE_TAG" = "latest" ]; then \
+        download_path="latest/download"; \
+    else \
+        download_path="download/$RELEASE_TAG"; \
+    fi; \
+    \
+    # Determine the runtime from the target platform provided by Docker Buildx
+    case "$TARGETPLATFORM" in \
+        "linux/arm/v7") runtime="linux-musl-arm" ;; \
+        "linux/arm64") runtime="linux-musl-arm64" ;; \
+        "linux/amd64") runtime="linux-musl-x64" ;; \
+        *) echo >&2 "ERROR: Unsupported target platform: $TARGETPLATFORM"; exit 1 ;; \
+    esac; \
+    \
+    # Download and extract the recyclarr binary from the release
+    wget --quiet -O recyclarr.zip "https://github.com/$REPOSITORY/releases/$download_path/recyclarr-$runtime.zip"; \
+    unzip recyclarr.zip;
+
+#############################################################################
+FROM alpine
+
+# Required by environment and/or dotnet
+ENV HOME=/config \
+    DOTNET_BUNDLE_EXTRACT_BASE_DIR=/tmp/.net \
+    # Environment variables used by the entrypoint script. These may be overridden from `docker run`
+    # as needed.
+    CRON_SCHEDULE="@daily" \
+    # The GLOBALIZATION variable is so that we do not need libicu installed (saves us ~40MB).
+    DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=true
+
+VOLUME /config
+
+RUN set -ex; \
+    apk add --no-cache busybox-suid su-exec libstdc++; \
+    adduser --disabled-password --home "$HOME" recyclarr;
+
+COPY --chown=recyclarr:recyclarr --chmod=544 --from=build /build/recyclarr /usr/local/bin
+COPY --chown=recyclarr:recyclarr --chmod=544 entrypoint.sh /
+
+ENTRYPOINT ["/entrypoint.sh"]

docker/docker-compose.yml

@@ -0,0 +1,21 @@
+version: '3'
+
+networks:
+  recyclarr:
+    name: recyclarr
+    external: true
+
+services:
+  recyclarr:
+    image: ghcr.io/recyclarr/recyclarr
+    container_name: recyclarr
+    build:
+      context: .
+      args:
+        - TARGETPLATFORM=linux/amd64
+    init: true
+    networks: [recyclarr]
+    volumes:
+      - ./config:/config
+    environment:
+      CRON_SCHEDULE: "* * * * *"

docker/entrypoint.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+set -e
+
+if [ ! -f "$HOME/recyclarr.yml" ]; then
+    su-exec recyclarr recyclarr create-config --path "$HOME"
+fi
+
+appdata="--app-data \"$HOME\""
+
+# If the script has any arguments, invoke the CLI instead. This allows the image to be used as a CLI
+# with something like:
+#
+# ```
+# docker run --rm -v ./config:/config ghcr.io/recyclarr/recyclarr sonarr
+# ```
+#
+if [ "$#" -gt 0 ]; then
+    su-exec recyclarr recyclarr "$@" $appdata
+else
+    echo "Creating crontab file..."
+    echo "$CRON_SCHEDULE recyclarr sonarr $appdata; recyclarr radarr $appdata" \
+        | crontab -u recyclarr -
+
+    crontab -l -u recyclarr
+
+    echo "Starting cron daemon..."
+    exec crond -f
+fi