feat(registry): daily GC cronjob — keep last 10 SHA tags per repo, prune layers

2026-03-29 19:26:10 -05:00
parent 4515fd7fba
commit bb8748d426
1 changed files with 104 additions and 0 deletions
@@ -0,0 +1,104 @@
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: registry-gc
+  namespace: registry
+spec:
+  # Run daily at 3am
+  schedule: "0 3 * * *"
+  concurrencyPolicy: Forbid
+  successfulJobsHistoryLimit: 3
+  failedJobsHistoryLimit: 3
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          restartPolicy: OnFailure
+          containers:
+            - name: registry-gc
+              image: registry:2
+              command:
+                - /bin/sh
+                - -c
+                - |
+                  set -e
+                  echo "Starting registry garbage collection..."
+
+                  # Keep the last 10 tags per repo; delete the rest via registry API
+                  REGISTRY_URL="http://registry:5000"
+
+                  # Get all repositories
+                  REPOS=$(wget -qO- "$REGISTRY_URL/v2/_catalog" | sed 's/.*"repositories":\[//;s/\].*//' | tr ',' '\n' | tr -d '"')
+
+                  for repo in $REPOS; do
+                    echo "Processing repo: $repo"
+
+                    # Get all tags sorted by date (registry API returns unordered, use digest order)
+                    TAGS=$(wget -qO- "$REGISTRY_URL/v2/$repo/tags/list" | sed 's/.*"tags":\[//;s/\].*//' | tr ',' '\n' | tr -d '"')
+                    TAG_COUNT=$(echo "$TAGS" | grep -c . || true)
+
+                    echo "  $TAG_COUNT tags found"
+
+                    # Separate SHA tags (40-char hex) from named tags (latest, etc.)
+                    SHA_TAGS=$(echo "$TAGS" | grep -E '^[0-9a-f]{40}$' || true)
+                    SHA_COUNT=$(echo "$SHA_TAGS" | grep -c . || true)
+
+                    # Keep the 10 most recent SHA tags; delete older ones
+                    KEEP=10
+                    if [ "$SHA_COUNT" -gt "$KEEP" ]; then
+                      TO_DELETE=$(echo "$SHA_TAGS" | head -n "-$KEEP")
+                      echo "  Deleting $(echo "$TO_DELETE" | grep -c .) old SHA tags..."
+
+                      for tag in $TO_DELETE; do
+                        # Get the manifest digest
+                        DIGEST=$(wget -qO- --server-response \
+                          --header="Accept: application/vnd.docker.distribution.manifest.v2+json" \
+                          "$REGISTRY_URL/v2/$repo/manifests/$tag" 2>&1 \
+                          | grep -i "docker-content-digest" | awk '{print $2}' | tr -d '\r')
+
+                        if [ -n "$DIGEST" ]; then
+                          # Delete by digest
+                          wget -q --method=DELETE \
+                            "$REGISTRY_URL/v2/$repo/manifests/$DIGEST" && \
+                            echo "  Deleted $repo:$tag ($DIGEST)" || \
+                            echo "  Failed to delete $repo:$tag"
+                        fi
+                      done
+                    else
+                      echo "  Skipping (only $SHA_COUNT SHA tags, keep threshold is $KEEP)"
+                    fi
+                  done
+
+                  # Run the built-in GC to reclaim disk space from deleted layers
+                  echo "Running storage garbage collection..."
+                  /bin/registry garbage-collect /etc/docker/registry/config.yml --delete-untagged=false
+                  echo "Done."
+              volumeMounts:
+                - name: data
+                  mountPath: /var/lib/registry
+                - name: config
+                  mountPath: /etc/docker/registry/config.yml
+                  subPath: config.yml
+          volumes:
+            - name: data
+              persistentVolumeClaim:
+                claimName: registry-data
+            - name: config
+              configMap:
+                name: registry-gc-config
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: registry-gc-config
+  namespace: registry
+data:
+  config.yml: |
+    version: 0.1
+    storage:
+      filesystem:
+        rootdirectory: /var/lib/registry
+      delete:
+        enabled: true
+    http:
+      addr: :5000