Build a docker image

Use Duplo to build and push a docker image from Github Actions

Avoid using capital letters when referencing a DuploCloud construct, such as a Tenant, even when the UI displays the string as all capital letters. Don't specify DEV01 for example, specify dev01.
Build and Push to ECR
The goal of this section is to show how you can build a docker image and push it to ECR.
It does three basic things:
Logs in to AWS ECR (using just-in-time AWS credentials from Duplo)
Builds and tags your docker image, with the tag based on the git commit SHA.
Pushes your docker image
Example Workflow
Here is an example github workflow that builds a docker image and pushes it to ECR.
To use it you will need to change:
duplo_host env var
<SERVICE_NAME> env var
<TENANT_NAME> env var
name: Build and Deploy
on:
  # (Optional) Allows users to trigger the workflow manually from the GitHub UI
  workflow_dispatch:
​
  # Triggers the workflow on push to matching branches
  push:
    branches:
      - master
env:
  duplo_host: https://mysystem.duplocloud.net  # CHANGE ME!
  duplo_token: "${{ secrets.DUPLO_TOKEN }}"
  SERVICE_NAME: myservice                      # CHANGE ME!
  TENANT_NAME: mytenant                        # CHANGE ME!
​
# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
​
      # Set up for docker build
      - name: Get AWS credentials
        uses: duplocloud/ghactions-aws-jit@master
        with:
          tenant: default
      - name: Login to Amazon ECR
        id: login-ecr
        uses: aws-actions/amazon-ecr-login@v1
​
      # Build and push the docker image
      - name: Docker Build and Push
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: |
            ${{ steps.login-ecr.outputs.registry }}/${{ env.SERVICE_NAME }}:${{ github.sha }}
            
    # This part is important - it will be used by the deploy job
    outputs:
      image: "${{ steps.login-ecr.outputs.registry }}/${{ env.SERVICE_NAME }}:${{ github.sha }}"

Configuring Github

Update a service

Last modified 1mo ago