Agent Skills: Docker Build with Tracking

Docker Build with Tracking

Build a Docker image with proper tagging and tracking: $ARGUMENTS

Process

1. Determine the image tag - Use git SHA or timestamp, NEVER use :latest alone

   GIT_SHA=$(git rev-parse --short HEAD)
   TIMESTAMP=$(date +%Y%m%d-%H%M%S)
   TAG="${GIT_SHA}-${TIMESTAMP}"
   

2. Build with cache busting when needed

   • For production builds: docker build --no-cache --pull -t <registry>/<image>:${TAG} .
   • For dev builds: docker build -t <registry>/<image>:${TAG} .
   • Always also tag as :<branch>-latest for convenience

3. Verify the build

   docker images | grep <image>
   docker inspect <registry>/<image>:${TAG} | jq '.[0].Created'
   

4. Push to registry

   docker push <registry>/<image>:${TAG}
   docker push <registry>/<image>:<branch>-latest
   

5. Verify in registry

   # For ACR:
   az acr repository show-tags --name <registry> --repository <image> --orderby time_desc --top 5
   # For Docker Hub:
   docker manifest inspect <registry>/<image>:${TAG}
   

Anti-Patterns (DO NOT)

• Never build with just :latest tag
• Never skip pushing after building
• Never deploy without verifying the image exists in the registry
• Never use imagePullPolicy: IfNotPresent with mutable tags