通过 aws-cdk 触发 aws-amplify 构建

Question

I am creating a aws-amplify app via aws-cdk and everything works fine except it doesn't start a build automatically. If I do a git commit (I have enabled continuous deploys) it will build and run just fine. But on a new aws account with a cdk deploy I have to start the first commit manually...

Answer 1

I had this issue as well while working on the deployment of an amplify hosted application.

After going through the AWS CLI documentation for Amplify, I found the start-job command. This command allows you to start an amplify job for a specific branch.

You can then create an AwsCustomResource that makes an SDK call to start-job.

This is what I ended up with.

const build_trigger = new customResource.AwsCustomResource(this, 'triggerAppBuild', {
    policy: customResource.AwsCustomResourcePolicy.fromSdkCalls({
        resources: customResource.AwsCustomResourcePolicy.ANY_RESOURCE
    }),
    onCreate: {
        service: 'Amplify',
        action: 'startJob',
        physicalResourceId: customResource.PhysicalResourceId.of('app-build-trigger'),
        parameters: {
            appId: amplifyApp.appId,
            branchName: master.branchName,
            jobType: 'RELEASE',
            jobReason: 'Auto Start build',
        }
    },
});

Note that you should replace amplifyApp.apiId and master.branchName with your own app ID and branch name. I am using the amplify-alpha, so you may need to get the App ID and branch name another way.

Answer 2

Amplify app builds are triggered by push events. Use a CDK Custom Resource or its simpler cousin Trigger to generate a push event during the CDK stack creation.

For a github repo, for instance, your Trigger construct's lambda would call the Github webhook test API, which will trigger the hook with the latest push to the current repository . Both Custom Resources and Triggers can be configured to run only on stack creation. Remember to give your lambda any necessary repo credentials (eg set environment variables via a secret).