How can I use private docker image in github actions

Question

I'm trying to set up a job in github-actions that runs a private docker image. I will do the build inside that docker image using the container option. link.

I'm using the following code:

jobs:
  container1:
    runs-on: ubuntu-latest
    container: saeed/privateimage:1
    steps:
      - uses: actions/checkout@v2
      - run: |
          echo "Runs inside a container"

But I can't provide my docker hub creds so it fails.

How can I authenticate to pull that private image?

Thanks.

Answer 1

It looks like support for this has been added just today, see blog post.

The post uses this example:

jobs:
  build:
    container:
      image: octocat/ci-image:latest
      credentials:
        username: mona
        password: ${{ secrets.docker_hub_password }}
    services:
      db:
        image:  octocat/testdb:latest
        credentials:
          username: mona
          password: ${{ secrets.docker_hub_password }}

The documentation for container is here.