ci(pjdfstest): cache docker layers via GHA to avoid apt mirror flakes (#9106)

* ci(pjdfstest): cache docker layers via GHA to avoid apt mirror flakes

Replace the local buildx cache + manual fallback with docker/setup-buildx-action
and docker/build-push-action using type=gha cache. The e2e and pjdfstest Dockerfile
layers now persist across runs in GitHub's own cache backend, so apt-get update
only hits Ubuntu mirrors when the Dockerfiles change. Also add Acquire::Retries
and Timeout so first-run cache-miss builds survive transient mirror sync errors.

* ci(pjdfstest): use local registry to share e2e image across buildx builds

The docker-container buildx driver cannot see images loaded into the host
Docker daemon, so the second build's FROM chrislusf/seaweedfs:e2e failed with
"not found" on registry-1.docker.io.

Run a local registry:2 on the runner, push both images to localhost:5000,
remap the FROM via build-contexts so the Dockerfile stays unchanged, then
tag the pulled images locally for docker compose to consume.

.github/workflows/pjdfstest.yml

@@ -39,18 +39,49 @@ jobs:
       with:
         go-version-file: 'go.mod'
 
-    - name: Build SeaweedFS e2e image
+    - name: Start local Docker registry
+      run: docker run -d --restart=always -p 5000:5000 --name registry registry:2
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v4
+      with:
+        driver-opts: network=host
+
+    - name: Build weed race binary
       run: |
         cd docker
-        make build_e2e || {
-          echo "Retrying without buildx cache..."
-          make binary_race
-          docker build --no-cache -t chrislusf/seaweedfs:e2e -f Dockerfile.e2e .
-        }
+        make binary_race
+
+    - name: Build SeaweedFS e2e image
+      uses: docker/build-push-action@v6
+      with:
+        context: docker
+        file: docker/Dockerfile.e2e
+        tags: localhost:5000/chrislusf/seaweedfs:e2e
+        push: true
+        cache-from: type=gha,scope=pjdfstest-e2e
+        cache-to: type=gha,mode=max,scope=pjdfstest-e2e
+
+    - name: Tag e2e image for docker compose
+      run: |
+        docker pull localhost:5000/chrislusf/seaweedfs:e2e
+        docker tag localhost:5000/chrislusf/seaweedfs:e2e chrislusf/seaweedfs:e2e
 
     - name: Build pjdfstest image
+      uses: docker/build-push-action@v6
+      with:
+        context: test/pjdfstest
+        build-contexts: |
+          chrislusf/seaweedfs:e2e=docker-image://localhost:5000/chrislusf/seaweedfs:e2e
+        tags: localhost:5000/chrislusf/seaweedfs:pjdfstest
+        push: true
+        cache-from: type=gha,scope=pjdfstest-harness
+        cache-to: type=gha,mode=max,scope=pjdfstest-harness
+
+    - name: Tag pjdfstest image for docker compose
       run: |
-        docker build -t chrislusf/seaweedfs:pjdfstest test/pjdfstest/
+        docker pull localhost:5000/chrislusf/seaweedfs:pjdfstest
+        docker tag localhost:5000/chrislusf/seaweedfs:pjdfstest chrislusf/seaweedfs:pjdfstest
 
     - name: Start SeaweedFS cluster
       run: |

docker/Dockerfile.e2e

@@ -7,8 +7,8 @@ LABEL author="Chris Lu"
 # Production images (Dockerfile.go_build) use proper user isolation with su-exec.
 # For testing purposes, running as root avoids permission complexities and dependency
 # on Alpine-specific tools like su-exec (not available in Ubuntu repos).
-RUN apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y \
+RUN apt-get -o Acquire::Retries=5 -o Acquire::http::Timeout=30 update && \
+    DEBIAN_FRONTEND=noninteractive apt-get -o Acquire::Retries=5 -o Acquire::http::Timeout=30 install -y \
     --no-install-recommends \
     --no-install-suggests \
     curl \

test/pjdfstest/Dockerfile

@@ -1,7 +1,7 @@
 FROM chrislusf/seaweedfs:e2e
 
-RUN apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y \
+RUN apt-get -o Acquire::Retries=5 -o Acquire::http::Timeout=30 update && \
+    DEBIAN_FRONTEND=noninteractive apt-get -o Acquire::Retries=5 -o Acquire::http::Timeout=30 install -y \
     --no-install-recommends \
     --no-install-suggests \
     autoconf \