How can I set the docker image version automatically from github? - docker

Question

I have link a github repo with my docker hub account. When there is a push to github master branch, a new image will be built in docker hub. But the image only has LATEST tag. How can I make the version increased automatically?
Ideally, I'd like it follow the sversion 1.0.0. And increase for every push 1.0.1, 1.0.2 1.0.3 etc.
Is there a way to make it follow this pattern?

Answer 1

You could associate a GitHub Action workflow to your repository, like docker/metadata-action
GitHub Action to extract metadata (tags, labels) for Docker. This action is particularly useful if used with Docker Build Push action.
You can see it used here. Warning: the tag name (as generated by the GitHub Action) will contain the branch name as well.

Answer 2

I was having the same problem, solved with this GitHub Action Code:
Create a secret called MAJOR to save your mayor version
Create a secret called MINOR to save your minor version
You will need a token to update you repo secrets, so... create a secret called REPO_ACCESS_TOKEN to grant your action dose his work.
name: Docker Image CI
on:
push:
branches: [ master ]
pull_request:
branches: [ master ]
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout#v2
-
name: Build the Docker image
run: docker build . --file src/MasterReport.UI/Dockerfile --tag eriksongm/master-report:${{ secrets.MAJOR }}.${{ secrets.MINOR }}
-
name: Login to DockerHub
uses: docker/login-action#v1
with:
username: ${{ secrets.DOCKERHUB_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
-
name: Push to DockerHub
run: docker push eriksongm/master-report:${{ secrets.MAJOR }}.${{ secrets.MINOR }}
-
name: Update Minor version
uses: hmanzur/actions-set-secret#v2.0.0
with:
name: 'MINOR'
value: $((${{ secrets.MINOR }}+1))
repository: EriksonGM/MasterReport
token: ${{ secrets.REPO_ACCESS_TOKEN }}
This was my final code, as you can see, I have a last step just to update the minor version, only if all the other jobs run ok.