how to get the sha value after push image to docker repo - docker

Question

Now I am implement a docker ci in github actions, first step build the docker image and push to remote repo like this:
- name: Build image push to aliyun
uses: docker/build-push-action#v1
with:
registry: ${{ secrets.ALI_DOCKER_HUB_REGISTRY }}
username: ${{ secrets.ALIYUN_DOCKER_REPO_USER_NAME }}
password: ${{ secrets.ALIYUN_DOCKER_REPO_USER_PASSWORD }}
tag_with_sha: true
repository: reddwarf-pro/dolphin-post
path: 'dolphin-post'
after pushed to remote repo, the next step I want to update my kubernetes cluster app using this newest image. I want do it like this:
- name: deploy to cluster
uses: steebchen/kubectl#v2.0.0
with: # defaults to latest kubectl binary version
config: ${{ secrets.KUBE_CONFIG_DATA }}
command: set image --record deployment/my-app container=${{ github.repository }}:${{ github.sha }}
- name: verify deployment
uses: steebchen/kubectl#v2.0.0
with:
config: ${{ secrets.KUBE_CONFIG_DATA }}
version: v1.21.0 # specify kubectl binary version explicitly
command: rollout status deployment/my-app
the github.sha represent the newest image sha code. But now I did not know how to get the github.sha value. Should I set into environment variable? How to set into environment variable? Where and How should I set the github.sha value?

Answer 1

do it like this:
- name: Build image push to aliyun
uses: docker/build-push-action#v1
with:
registry: ${{ secrets.ALI_DOCKER_HUB_REGISTRY }}
username: ${{ secrets.ALIYUN_DOCKER_REPO_USER_NAME }}
password: ${{ secrets.ALIYUN_DOCKER_REPO_USER_PASSWORD }}
tags: ${{ github.sha }}
repository: reddwarf-pro/dolphin-post
path: 'dolphin-post'
- name: deploy to cluster
uses: steebchen/kubectl#v2.0.0
with: # defaults to latest kubectl binary version
config: ${{ secrets.KUBE_CONFIG_DATA }}
command: set image --record deployment/dolphin-post-service dolphin-post-service=registry.cn-hangzhou.aliyuncs.com/reddwarf-pro/dolphin-post:${{ github.sha }} -n reddwarf-pro