@aws-cdk/aws-codepipeline

Better interface to AWS Code Pipeline

AWS CodePipeline Construct Library



Pipeline

To construct an empty Pipeline:

import * as codepipeline from '@aws-cdk/aws-codepipeline';

const pipeline = new codepipeline.Pipeline(this, 'MyFirstPipeline');

To give the Pipeline a nice, human-readable name:

const pipeline = new codepipeline.Pipeline(this, 'MyFirstPipeline', {
  pipelineName: 'MyPipeline',
});

Stages

You can provide Stages when creating the Pipeline:

const pipeline = new codepipeline.Pipeline(this, 'MyFirstPipeline', {
  stages: [
    {
      stageName: 'Source',
      actions: [
        // see below...
      ],
    },
  ],
});

Or append a Stage to an existing Pipeline:

const sourceStage = pipeline.addStage({
  stageName: 'Source',
  actions: [ // optional property
    // see below...
  ],
});

You can insert the new Stage at an arbitrary point in the Pipeline:

const someStage = pipeline.addStage({
  stageName: 'SomeStage',
  placement: {
    // note: you can only specify one of the below properties
    rightBefore: anotherStage,
    justAfter: anotherStage
  }
});

Actions

Actions live in a separate package, @aws-cdk/aws-codepipeline-actions.

To add an Action to a Stage, you can provide it when creating the Stage, in the actions property, or you can use the IStage.addAction() method to mutate an existing Stage:

sourceStage.addAction(someAction);

Cross-region CodePipelines

You can also use the cross-region feature to deploy resources into a different region than your Pipeline is in.

It works like this:

const pipeline = new codepipeline.Pipeline(this, 'MyFirstPipeline', {
  // ...
  crossRegionReplicationBuckets: {
    // note that a physical name of the replication Bucket must be known at synthesis time
    'us-west-1': s3.Bucket.fromBucketAttributes(this, 'UsWest1ReplicationBucket', {
      bucketName: 'my-us-west-1-replication-bucket',
      // optional KMS key
      encryptionKey: kms.Key.fromKeyArn(this, 'UsWest1ReplicationKey',
        'arn:aws:kms:us-west-1:123456789012:key/1234-5678-9012'
      ),
    }),
  },
});

// later in the code...
new codepipeline_actions.CloudFormationCreateUpdateStackAction({
  actionName: 'CFN_US_West_1',
  // ...
  region: 'us-west-1',
});

This way, the CFN_US_West_1 Action will operate in the us-west-1 region, regardless of which region your Pipeline is in.

If you don't provide a bucket for a region (other than the Pipeline's region) that you're using for an Action, there will be a new Stack, called <nameOfYourPipelineStack>-support-<region>, defined for you, containing a replication Bucket. This new Stack will depend on your Pipeline Stack, so deploying the Pipeline Stack will deploy the support Stack(s) first. Example:

$ cdk ls
MyMainStack
MyMainStack-support-us-west-1
$ cdk deploy MyMainStack
# output of cdk deploy here...

See the AWS docs here for more information on cross-region CodePipelines.

Creating an encrypted replication bucket

If you're passing a replication bucket created in a different stack, like this:

const replicationStack = new Stack(app, 'ReplicationStack', {
  env: {
    region: 'us-west-1',
  },
});
const key = new kms.Key(replicationStack, 'ReplicationKey');
const replicationBucket = new s3.Bucket(replicationStack, 'ReplicationBucket', {
  // like was said above - replication buckets need a set physical name
  bucketName: PhysicalName.GENERATE_IF_NEEDED,
  encryptionKey: key, // does not work!
});

// later...
new codepipeline.Pipeline(pipelineStack, 'Pipeline', {
  crossRegionReplicationBuckets: {
    'us-west-1': replicationBucket,
  },
});

When trying to encrypt it (and note that if any of the cross-region actions happen to be cross-account as well, the bucket has to be encrypted - otherwise the pipeline will fail at runtime), you cannot use a key directly - KMS keys don't have physical names, and so you can't reference them across environments.

In this case, you need to use an alias in place of the key when creating the bucket:

const key = new kms.Key(replicationStack, 'ReplicationKey');
const alias = new kms.Alias(replicationStack, 'ReplicationAlias', {
  // aliasName is required
  aliasName: PhysicalName.GENERATE_IF_NEEDED,
  targetKey: key,
});
const replicationBucket = new s3.Bucket(replicationStack, 'ReplicationBucket', {
  bucketName: PhysicalName.GENERATE_IF_NEEDED,
  encryptionKey: alias,
});

Variables

The library supports the CodePipeline Variables feature. Each action class that emits variables has a separate variables interface, accessed as a property of the action instance called variables. You instantiate the action class and assign it to a local variable; when you want to use a variable in the configuration of a different action, you access the appropriate property of the interface returned from variables, which represents a single variable. Example:

// MyAction is some action type that produces variables
const myAction = new MyAction({
  // ...
});
new OtherAction({
  // ...
  config: myAction.variables.myVariable,
});

The namespace name that will be used will be automatically generated by the pipeline construct, based on the stage and action name; you can pass a custom name when creating the action instance:

const myAction = new MyAction({
  // ...
  variablesNamespace: 'MyNamespace',
});

There are also global variables available, not tied to any action; these are accessed through static properties of the GlobalVariables class:

new OtherAction({
  // ...
  config: codepipeline.GlobalVariables.executionId,
});

Check the documentation of the @aws-cdk/aws-codepipeline-actions for details on how to use the variables for each action class.

See the CodePipeline documentation for more details on how to use the variables feature.

Events

Using a pipeline as an event target

A pipeline can be used as a target for a CloudWatch event rule:

import * as targets from '@aws-cdk/aws-events-targets';
import * as events from '@aws-cdk/aws-events';

// kick off the pipeline every day
const rule = new events.Rule(this, 'Daily', {
  schedule: events.Schedule.rate(Duration.days(1)),
});

rule.addTarget(new targets.CodePipeline(pipeline));

When a pipeline is used as an event target, the "codepipeline:StartPipelineExecution" permission is granted to the AWS CloudWatch Events service.

Event sources

Pipelines emit CloudWatch events. To define event rules for events emitted by the pipeline, stages or action, use the onXxx methods on the respective construct:

myPipeline.onStateChange('MyPipelineStateChange', target);
myStage.onStateChange('MyStageStateChange', target);
myAction.onStateChange('MyActionStateChange', target);

HomePage

https://github.com/aws/aws-cdk

Repository

https://github.com/aws/aws-cdk.git


公众号

欢迎 JavaScript 爱好者