[Feature] container image auto-release scripts

[Jeffwan]

Search before asking

• I had searched in the issues and found no similar feature requirement.

Description

Create a script to automate image release process.

• for master image: nightly
• for testing image: ${commit_hash}
• for release branch image: v0.1.0 etc.

Use case

Currently, we build image manually and retag the image and then publish to docker hub. this is too much manual work and error-prone.

Related issues

#68
#69

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

[Jeffwan]

/cc @wilsonwang371 if you are interested in it.

[Jeffwan]

for master image: nightly
for testing image: ${commit_hash}
for release branch image: v0.1.0 etc.

kuberay/.github/workflows/test-job.yaml

Lines 128 to 130 in ffa7e60

	docker push kuberay/operator:${{ steps.vars.outputs.sha_short }};
	docker image tag kuberay/operator:${{ steps.vars.outputs.sha_short }} kuberay/operator:nightly;
	docker push kuberay/operator:nightly

Here we already build nightly and ${commit_hash}, we still need a tool to help us manually release images.

For each release,

1. We should check if post submit job success or not. If not, fix it.
2. Find the most recent commit hash and retag to tag version like v0.2.0 etc, push images to registry
3. Update documentation and manifests
4. Cut release and tag

We need a release process doc and scripts or commands

[Jeffwan]

Since we don't use cloud build or some other pipelines to release the process, there's some manual steps.

scripts here are extremely easy and I think we can use command lines directly rather that tools.

docker tag kuberay/operator:${commit_hash} 
docker push kuberay/operator:v0.2.0