initial ci config

.gitlab-ci.yml

@@ -1,21 +1,77 @@
-image: egon0/docker-with-buildx-and-git:latest
+# This is a GitLab CI configuration to build the project as a docker image
+# The file is generic enough to be dropped in a project containing a working Dockerfile
+# Author: Florent CHAUVEAU <florent.chauveau@gmail.com>
+# Mentioned here: https://blog.callr.tech/building-docker-images-with-gitlab-ci-best-practices/
+
+# do not use "latest" here, if you want this to work in the future
+image: docker:19
 
 variables:
-  DOCKER_HOST: tcp://docker:2375/
-  DOCKER_DRIVER: overlay2
+  DOCKER_DRIVER: overlay
   DOCKER_TLS_CERTDIR: ""
 
-services:
-  - docker:dind
+stages:
+  - build
+  - push
 
-build:
+# Use this if your GitLab runner does not use socket binding
+services:
+   - docker:19-dind
+
+before_script:
+  # docker login asks for the password to be passed through stdin for security
+  # we use $CI_JOB_TOKEN here which is a special token provided by GitLab
+  - echo -n $CI_JOB_TOKEN | docker login -u gitlab-ci-token --password-stdin $CI_REGISTRY
+
+Build:
   stage: build
-  variables:
-    IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
-    D_IMAGE_TAG: egon0/prosody-alpine-ldap-multiarch:$CI_COMMIT_REF_SLUG
-    D_LATEST_TAG: egon0/prosody-alpine-ldap-multiarch:latest
   script:
-    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
-    - docker login -u $DOCKER_LOGIN -p $DOCKER_PASSWORD
-    - docker buildx create --use --name A$CI_COMMIT_SHORT_SHA
-    - docker buildx build --platform $BUILD_PLATFORMS --push -t $IMAGE_TAG -t $CI_REGISTRY_IMAGE:latest -t $D_IMAGE_TAG -t $D_LATEST_TAG .
+    # fetches the latest image (not failing if image is not found)
+    - docker pull $CI_REGISTRY_IMAGE:latest || true
+    # builds the project, passing proxy variables, and vcs vars for LABEL
+    # notice the cache-from, which is going to use the image we just pulled locally
+    # the built image is tagged locally with the commit SHA, and then pushed to 
+    # the GitLab registry
+    - >
+      docker build
+      --pull
+      --build-arg VCS_REF=$CI_COMMIT_SHA
+      --build-arg VCS_URL=$CI_PROJECT_URL
+      --cache-from $CI_REGISTRY_IMAGE:latest
+      --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+      .
+    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+
+# Here, the goal is to tag the "main" branch as "latest"
+Push latest:
+  variables:
+    # We are just playing with Docker here. 
+    # We do not need GitLab to clone the source code.
+    GIT_STRATEGY: none
+  stage: push
+  only:
+    # Only "main" should be tagged "latest"
+    - main
+  script:
+    # Because we have no guarantee that this job will be picked up by the same runner 
+    # that built the image in the previous step, we pull it again locally
+    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+    # Then we tag it "latest"
+    - docker tag $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME $CI_REGISTRY_IMAGE:latest
+    # Annnd we push it.
+    - docker push $CI_REGISTRY_IMAGE:latest
+
+# Finally, the goal here is to Docker tag any Git tag
+# GitLab will start a new pipeline everytime a Git tag is created, which is pretty awesome
+Push tag:
+  variables:
+    # Again, we do not need the source code here. Just playing with Docker.
+    GIT_STRATEGY: none
+  stage: push
+  only:
+    # We want this job to be run on tags only.
+    - tags
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+    - docker tag $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME

Dockerfile

@@ -1,5 +1,7 @@
-FROM alpine:3.16
-MAINTAINER Micha Gläß-Stöcker <micha+docker@glaess.cc>
+FROM alpine:3.7
+MAINTAINER Jochen Schalanda <jochen+docker@schalanda.name>
+
+ENV PROSODY_VERSION 0.10.0-r2
 
 # Build-time metadata as defined at http://label-schema.org
 ARG BUILD_DATE
@@ -11,12 +13,13 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
       org.label-schema.description="Prosody IM Docker image based on Alpine Linux" \
       org.label-schema.url="https://prosody.im/" \
       org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.vcs-url="https://github.com/joschi/docker-prosody-alpine" \
       org.label-schema.version=$VERSION \
       org.label-schema.schema-version="1.0" \
       com.microscaling.docker.dockerfile="/Dockerfile" \
       com.microscaling.license="MIT"
 
-RUN apk add --no-cache bash "prosody" lua5.2-ldap
+RUN apk add --no-cache bash "prosody=${PROSODY_VERSION}"
 RUN mkdir -p /etc/prosody/conf.d /usr/local/lib/prosody/modules
 
 COPY prosody.cfg.lua /etc/prosody/prosody.cfg.lua

renovate.json

@@ -1,3 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
-}