feat(cloudwatch): EC2 actions

packages/@aws-cdk/aws-cloudwatch-actions/README.md

@@ -11,4 +11,5 @@
 
 This library contains a set of classes which can be used as CloudWatch Alarm actions.
 
+The currently implemented actions are: EC2 Actions, SNS Actions, Autoscaling Actions and Aplication Autoscaling Actions
 See `@aws-cdk/aws-cloudwatch` for more information.

packages/@aws-cdk/aws-cloudwatch-actions/lib/ec2.ts

@@ -0,0 +1,47 @@
+import * as cloudwatch from '@aws-cdk/aws-cloudwatch';
+import { Stack } from '@aws-cdk/core';
+
+// keep this import separate from other imports to reduce chance for merge conflicts with v2-main
+// eslint-disable-next-line no-duplicate-imports, import/order
+import { Construct } from '@aws-cdk/core';
+
+/**
+ * Types of EC2 actions available
+ */
+export enum Ec2InstanceActions {
+  /**
+   * Stop the instance
+   */
+  STOP = 'stop',
+  /**
+   * Terminatethe instance
+   */
+  TERMINATE = 'terminate',
+  /**
+   * Recover the instance
+   */
+  RECOVER = 'recover',
+  /**
+   * Reboot the instance
+   */
+  REBOOT = 'reboot'
+}
+
+/**
+ * Use an EC2 action as an Alarm action
+ */
+export class Ec2Action implements cloudwatch.IAlarmAction {
+  private ec2Action: string;
+
+  constructor(instanceAction: Ec2InstanceActions) {
+    this.ec2Action = instanceAction;
+  }
+
+  /**
+   * Returns an alarm action configuration to use an EC2 action as an alarm action
+   */
+  bind(_scope: Construct, _alarm: cloudwatch.IAlarm): cloudwatch.AlarmActionConfig {
+    return { alarmActionArn: `arn:aws:automate:${Stack.of(_scope).region}:ec2:${this.ec2Action}` };
+  }
+}
+

packages/@aws-cdk/aws-cloudwatch-actions/lib/index.ts

@@ -1,3 +1,4 @@
 export * from './appscaling';
 export * from './autoscaling';
 export * from './sns';
+export * from './ec2';

packages/@aws-cdk/aws-cloudwatch-actions/test/ec2.test.ts

@@ -0,0 +1,36 @@
+import '@aws-cdk/assert/jest';
+import * as cloudwatch from '@aws-cdk/aws-cloudwatch';
+import { Stack } from '@aws-cdk/core';
+import * as actions from '../lib';
+
+test('can use instance reboot as alarm action', () => {
+  // GIVEN
+  const stack = new Stack();
+  //const topic = new sns.Topic(stack, 'Topic');
+  const alarm = new cloudwatch.Alarm(stack, 'Alarm', {
+    metric: new cloudwatch.Metric({ namespace: 'AWS', metricName: 'Henk' }),
+    evaluationPeriods: 3,
+    threshold: 100,
+  });
+
+  // WHEN
+  alarm.addAlarmAction(new actions.Ec2Action(actions.Ec2InstanceActions.REBOOT));
+
+  // THEN
+  expect(stack).toHaveResource('AWS::CloudWatch::Alarm', {
+    AlarmActions: [
+      {
+        'Fn::Join': [
+          '',
+          [
+            'arn:aws:automate:',
+            {
+              Ref: 'AWS::Region',
+            },
+            ':ec2:reboot',
+          ],
+        ],
+      },
+    ],
+  });
+});