Check Docker Image

A tool to check whether docker images exist in the remote registry.

Build project:

go build -o check-image .

Example usage:

REGISTRY_URL=https://harbor.mycompany.com \
REGISTRY_USERNAME=harboruser \
REGISTRY_PASSWORD=harborpass \
CHECKED_IMAGES=myrepo/mysvc1:v1,myrepo/mysvc2:v1,myrepo/mysvc3:v1 \
LOGLEVEL=info \
./check-image

• REGISTRY_URL: registry URL, can be either secure or insecure registry
  • Should be set to https://registry-1.docker.io if you are using Dockerhub
• REGISTRY_USERNAME: username for registry authentication
  • Can be set empty if all checked images are public
• REGISTRY_PASSWORD: password for registry authentication
  • Can be set empty if all checked images are public
• CHECKED_IMAGES: comma-separated list of images to be checked
• LOGLEVEL: log level, can be debug, info, warn, or error (default is info)

To obtain the result, you can refer to the following command:

./check-image; if [ `echo $?` = '0' ]; then touch SUCCESS; fi

If the file SUCCESS is created, then the check has passed.

Dockerhub example usage:

REGISTRY_URL=https://registry-1.docker.io \
CHECKED_IMAGES=bitnami/golang:1.16.2,bitnami/golang:1.17,bitnami/golang:1.12,bitnami/golang:9999 \
./check-image

You can also run the docker image directly:

docker run \
-e REGISTRY_URL=https://harbor.mycompany.com \
-e REGISTRY_USERNAME=harboruser \
-e REGISTRY_PASSWORD=harborpass \
-e CHECKED_IMAGES=myrepo/mysvc1:v7.3.2,myrepo/mysvc2:v8,myrepo/mysvc3:v8.2.0  \
minghsu0107/check-docker-image:v1