Create a minimal image without gcloud and save one GB (#38)

Author: robertvolkmann

.github/workflows/docker.yaml

@@ -40,9 +40,18 @@ jobs:
         [ "${GITHUB_EVENT_NAME}" == 'release' ] && echo "tag=${GITHUB_REF##*/}" >> $GITHUB_ENV || true
         [ "${GITHUB_EVENT_NAME}" == 'push' ] && echo "tag=latest" >> $GITHUB_ENV || true
 
-    - name: Build and push image
-      uses: docker/build-push-action@v5
+    - name: Build and push minimal image
+      uses: docker/build-push-action@v6
+      with:
+        context: .
+        push: true
+        tags: ${{ env.REGISTRY }}/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}:${{ env.tag }}-minimal
+        target: minimal
+
+    - name: Build and push gcloud image
+      uses: docker/build-push-action@v6
       with:
         context: .
         push: true
         tags: ${{ env.REGISTRY }}/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}:${{ env.tag }}
+        target: gcloud

Dockerfile

@@ -1,10 +1,7 @@
-FROM python:3.11-slim
+FROM python:3.11-slim AS minimal
 
 ENV VERSION_CT=0.9.0 \
-    VERSION_HELM=3.12.3 \
-    CLOUD_SDK_VERSION=465.0.0
-
-ENV PATH /google-cloud-sdk/bin:$PATH
+    VERSION_HELM=3.12.3
 
 RUN set -x \
  && apt-get update \
@@ -17,15 +14,6 @@ RUN set -x \
         openssh-client \
         rsync \
  && rm -rf /var/lib/apt/lists/* \
- && curl -O https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-sdk-${CLOUD_SDK_VERSION}-linux-x86_64.tar.gz \
- && tar xzf google-cloud-sdk-${CLOUD_SDK_VERSION}-linux-x86_64.tar.gz \
- && rm google-cloud-sdk-${CLOUD_SDK_VERSION}-linux-x86_64.tar.gz \
- && gcloud config set core/disable_usage_reporting true \
- && gcloud config set component_manager/disable_update_check true \
- && gcloud config set metrics/environment github_docker_image \
- && gcloud components install gke-gcloud-auth-plugin \
- && rm -rf /google-cloud-sdk/.install/.backup \
- && gcloud --version \
  && curl -fsSL https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash -s -- --version "v${VERSION_HELM}" \
  && helm plugin install https://github.com/databus23/helm-diff \
  && python3 -m pip install --disable-pip-version-check --no-cache-dir \
@@ -40,9 +28,24 @@ RUN set -x \
         passlib==1.7.4 \
  && curl -Lo ct https://github.com/coreos/container-linux-config-transpiler/releases/download/v${VERSION_CT}/ct-v${VERSION_CT}-x86_64-unknown-linux-gnu \
  && chmod +x ct \
- && mv ct /usr/local/bin/ \
- && rm -rf /tmp/*
+ && mv ct /usr/local/bin/
 
 COPY ansible.cfg /etc/ansible/ansible.cfg
 
 ENTRYPOINT []
+
+FROM minimal AS gcloud
+
+ENV CLOUD_SDK_VERSION=465.0.0
+
+ENV PATH=/google-cloud-sdk/bin:$PATH
+
+RUN curl -O https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-sdk-${CLOUD_SDK_VERSION}-linux-x86_64.tar.gz \
+ && tar xzf google-cloud-sdk-${CLOUD_SDK_VERSION}-linux-x86_64.tar.gz \
+ && rm google-cloud-sdk-${CLOUD_SDK_VERSION}-linux-x86_64.tar.gz \
+ && gcloud config set core/disable_usage_reporting true \
+ && gcloud config set component_manager/disable_update_check true \
+ && gcloud config set metrics/environment github_docker_image \
+ && gcloud components install gke-gcloud-auth-plugin \
+ && rm -rf /google-cloud-sdk/.install/.backup \
+ && gcloud --version