universal-docker: initial release

Author: aptalca

.travis.yml

@@ -4,16 +4,16 @@ language: shell
 
 branches:
   only:
-    - <baseimagename>-<modname> #replace variables, omit brackets
+    - universal-docker
 
 services:
   - docker
 
 env:
   global:
-    - DOCKERHUB="linuxserver/mods" #don't modify
-    - BASEIMAGE="baseimagename" #replace
-    - MODNAME="modname" #replace
+    - DOCKERHUB="linuxserver/mods"
+    - BASEIMAGE="universal"
+    - MODNAME="docker"
 
 jobs:
   include:
@@ -25,11 +25,19 @@ jobs:
     - stage: BuildImage
       if: (NOT (type IN (pull_request)))
       script:
+        # Set version
+        - if [ -z ${COMPOSE_TAG+x} ]; then COMPOSE_TAG=$(curl -sX GET "https://api.github.com/repos/linuxserver/docker-docker-compose/releases/latest" | awk '/tag_name/{print $4;exit}' FS='[""]'); fi
+        - if [ -z ${COMPOSE_ALPINE_TAG+x} ]; then COMPOSE_ALPINE_TAG=$(curl -sX GET "https://api.github.com/repos/linuxserver/docker-docker-compose/releases" | jq -r 'first(.[] | select(.prerelease==true)) | .tag_name'); fi
+        - COMPOSE_VERSION=$(echo "$COMPOSE_TAG" | sed 's|-ls.*||g')
+        - COMPOSE_ALPINE_VERSION="$(echo ${COMPOSE_ALPINE_TAG} | sed 's|-ls.*||g' | sed 's|alpine-||g')"
+        - if [ "$COMPOSE_VERSION" != "$COMPOSE_ALPINE_VERSION" ]; then echo "ubuntu and alpine versions are different; exiting!" && travis_terminate 1; else echo "ubuntu and alpine versions are the same, continuing with build"; fi
         # Build image
-        - docker build --no-cache -t ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${TRAVIS_COMMIT} .
-        - docker tag ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${TRAVIS_COMMIT} ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}
+        - docker build --no-cache --build-arg COMPOSE_TAG=${COMPOSE_TAG} --build-arg COMPOSE_ALPINE_TAG=${COMPOSE_ALPINE_TAG} -t ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${COMPOSE_VERSION}-${TRAVIS_COMMIT} .
+        - docker tag ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${COMPOSE_VERSION}-${TRAVIS_COMMIT} ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${COMPOSE_VERSION}
+        - docker tag ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${COMPOSE_VERSION}-${TRAVIS_COMMIT} ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}
         # Login to DockerHub
         - echo $DOCKERPASS | docker login -u $DOCKERUSER --password-stdin
         # Push all of the tags
-        - docker push ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${TRAVIS_COMMIT}
+        - docker push ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${COMPOSE_VERSION}-${TRAVIS_COMMIT}
+        - docker push ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${COMPOSE_VERSION}
         - docker push ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}

Dockerfile

@@ -1,6 +1,33 @@
+ARG COMPOSE_TAG="latest"
+ARG COMPOSE_ALPINE_TAG="alpine"
+
+FROM linuxserver/docker-compose:amd64-${COMPOSE_TAG} as compose-amd64
+FROM linuxserver/docker-compose:arm32v7-${COMPOSE_TAG} as compose-arm32
+FROM linuxserver/docker-compose:arm64v8-${COMPOSE_TAG} as compose-arm64
+FROM linuxserver/docker-compose:amd64-${COMPOSE_ALPINE_TAG} as compose-alpine-amd64
+FROM linuxserver/docker-compose:arm32v7-${COMPOSE_ALPINE_TAG} as compose-alpine-arm32
+FROM linuxserver/docker-compose:arm64v8-${COMPOSE_ALPINE_TAG} as compose-alpine-arm64
+
+FROM lsiobase/alpine:3.12 as buildstage
+
+COPY --from=compose-amd64 /usr/local/bin/docker-compose /root-layer/docker-compose-ubuntu/docker-compose_x86_64
+COPY --from=compose-amd64 /usr/local/bin/docker /root-layer/docker-compose-ubuntu/docker_x86_64
+COPY --from=compose-arm32 /usr/local/bin/docker-compose /root-layer/docker-compose-ubuntu/docker-compose_armv7l
+COPY --from=compose-arm32 /usr/local/bin/docker /root-layer/docker-compose-ubuntu/docker_armv7l
+COPY --from=compose-arm64 /usr/local/bin/docker-compose /root-layer/docker-compose-ubuntu/docker-compose_aarch64
+COPY --from=compose-arm64 /usr/local/bin/docker /root-layer/docker-compose-ubuntu/docker_aarch64
+COPY --from=compose-alpine-amd64 /usr/local/bin/docker-compose /root-layer/docker-compose-alpine/docker-compose_x86_64
+COPY --from=compose-alpine-amd64 /usr/local/bin/docker /root-layer/docker-compose-alpine/docker_x86_64
+COPY --from=compose-alpine-arm32 /usr/local/bin/docker-compose /root-layer/docker-compose-alpine/docker-compose_armv7l
+COPY --from=compose-alpine-arm32 /usr/local/bin/docker /root-layer/docker-compose-alpine/docker_armv7l
+COPY --from=compose-alpine-arm64 /usr/local/bin/docker-compose /root-layer/docker-compose-alpine/docker-compose_aarch64
+COPY --from=compose-alpine-arm64 /usr/local/bin/docker /root-layer/docker-compose-alpine/docker_aarch64
+COPY root/ /root-layer/
+
+# runtime stage
 FROM scratch
 
-LABEL maintainer="username"
+LABEL maintainer="aptalca"
 
-# copy local files
-COPY root/ /
+# Add files from buildstage
+COPY --from=buildstage /root-layer/ /

Dockerfile.complex

@@ -1,17 +1,9 @@
-# Rsync - Docker mod for openssh-server
+# Docker - Docker mod for all images
 
-This mod adds rsync to openssh-server, to be installed/updated during container start.
+This mod adds `docker` and `docker-compose` binaries to any linuxserver image.
 
-In openssh-server docker arguments, set an environment variable `DOCKER_MODS=linuxserver/mods:openssh-server-rsync`
+**IMPORTANT NOTE**: For docker access inside a container, a volume mapping needs to be added for `/var/run/docker.sock:/var/run/docker.sock` in the container's docker run/create/compose. If you'd like to connect to a remote docker service instead, you don't have to map the docker sock; you can either set an env var for `DOCKER_HOST=remoteaddress` or use the docker cli option `-H`.
 
-If adding multiple mods, enter them in an array separated by `|`, such as `DOCKER_MODS=linuxserver/mods:openssh-server-rsync|linuxserver/mods:openssh-server-mod2`
+In the container's docker arguments, set an environment variable `DOCKER_MODS=linuxserver/mods:universal-docker` to enable.
 
-# Mod creation instructions
-
-* Fork the repo, create a new branch based on the branch `template`.
-* Edit the `Dockerfile` for the mod. `Dockerfile.complex` is only an example and included for reference; it should be deleted when done.
-* Inspect the `root` folder contents. Edit, add and remove as necessary.
-* Edit this readme with pertinent info, delete these instructions.
-* Finally edit the `travis.yml`. Customize the build branch, and the vars for `BASEIMAGE` and `MODNAME`.
-* Ask the team to create a new branch named `<baseimagename>-<modname>`. Baseimage should be the name of the image the mod will be applied to. The new branch will be based on the `template` branch.
-* Submit PR against the branch created by the team.
+If adding multiple mods, enter them in an array separated by `|`, such as `DOCKER_MODS=linuxserver/mods:universal-docker|linuxserver/mods:universal-mod2`

README.md

@@ -0,0 +1,36 @@
+#!/usr/bin/with-contenv bash
+
+echo "**** installing docker and docker compose ****"
+if [ -f /usr/bin/apt ]; then
+  DISTRONAME="ubuntu"
+else
+  DISTRONAME="alpine"
+fi
+ARCH=$(uname -m)
+if [ -f "/docker-compose-${DISTRONAME}/docker-compose_${ARCH}" ] ; then
+  echo "Copying over docker and docker-compose binaries"
+  mv "/docker-compose-${DISTRONAME}/docker-compose_${ARCH}" /usr/local/bin/docker-compose
+  mv "/docker-compose-${DISTRONAME}/docker_${ARCH}" /usr/local/bin/docker
+  chmod +x /usr/local/bin/docker-compose
+  rm -rf /docker-compose-ubuntu /docker-compose-alpine
+else
+  echo "**** docker and docker-compose already installed, skipping ****"
+fi
+
+if [ -S /var/run/docker.sock ]; then
+  DOCKER_GID=$(stat -c '%g' "/var/run/docker.sock")
+  if id -G abc | grep -qw "$DOCKER_GID"; then
+    exit 0
+  else
+    DOCKER_NAME=$(getent group "${DOCKER_GID}" | awk -F: '{print $1}')
+    if [ -z "${DOCKER_NAME}" ]; then
+      DOCKER_NAME="dockergroup"
+      groupadd -g "${DOCKER_GID}" "${DOCKER_NAME}"
+    fi
+    usermod -aG "${DOCKER_NAME}" abc
+  fi
+elif [ -n "$DOCKER_HOST" ]; then
+  echo "**** /var/run/docker.sock is not mapped, therefore, docker client will only work with a remote docker service ****"
+else
+  echo "**** Please map /var/run/docker.sock for access to docker service on host. Alternatively you can manually define a remote host address with the docker cli option -H ****"
+fi