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fix(cloudwatch-actions): LambdaAction fails if added to multiple action types #29515

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merged 7 commits into from
Apr 2, 2024
Merged

fix(cloudwatch-actions): LambdaAction fails if added to multiple action types #29515

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e58904a
fix(cloudwatch-actions): LambdaAction fails if added to multiple acti…
morrijm4 Mar 16, 2024
0f18813
integ test updates
morrijm4 Mar 16, 2024
c3a5a0a
add arn comparison & rm feature flag interference
morrijm4 Mar 16, 2024
71104db
add comment & test case
morrijm4 Mar 19, 2024
a5951b2
Merge branch 'main' into morrijm4/lambda-action-fails-with-multiple-a…
morrijm4 Mar 19, 2024
80c8f51
Merge branch 'main' into morrijm4/lambda-action-fails-with-multiple-a…
morrijm4 Mar 31, 2024
3b222f3
Merge branch 'main' into morrijm4/lambda-action-fails-with-multiple-a…
GavinZZ Apr 2, 2024
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18 changes: 11 additions & 7 deletions packages/aws-cdk-lib/aws-cloudwatch-actions/lib/lambda.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -22,13 +22,17 @@ export class LambdaAction implements cloudwatch.IAlarmAction {
* @see https://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/API_PutMetricAlarm.html
*/
bind(scope: Construct, alarm: cloudwatch.IAlarm): cloudwatch.AlarmActionConfig {
const idPrefix = FeatureFlags.of(scope).isEnabled(LAMBDA_PERMISSION_LOGICAL_ID_FOR_LAMBDA_ACTION) ? alarm.node.id : '';
this.lambdaFunction.addPermission(`${idPrefix}AlarmPermission`, {
sourceAccount: Stack.of(scope).account,
action: 'lambda:InvokeFunction',
sourceArn: alarm.alarmArn,
principal: new iam.ServicePrincipal('lambda.alarms.cloudwatch.amazonaws.com'),
});
const flag = FeatureFlags.of(scope).isEnabled(LAMBDA_PERMISSION_LOGICAL_ID_FOR_LAMBDA_ACTION);
const idPrefix = flag ? alarm.node.id : '';
const permissionId = `${idPrefix}AlarmPermission`;
if (!this.lambdaFunction.permissionsNode.tryFindChild(permissionId) || !flag) {
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this.lambdaFunction.addPermission(permissionId, {
sourceAccount: Stack.of(scope).account,
action: 'lambda:InvokeFunction',
sourceArn: alarm.alarmArn,
principal: new iam.ServicePrincipal('lambda.alarms.cloudwatch.amazonaws.com'),
});
}

return {
alarmActionArn: this.lambdaFunction.functionArn,
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8 changes: 8 additions & 0 deletions packages/aws-cdk-lib/aws-cloudwatch-actions/test/lambda.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -139,7 +139,12 @@ def handler(event, context):
handler: 'index.handler',
});
alarm1.addAlarmAction(new actions.LambdaAction(alarmLambda));
alarm1.addOkAction(new actions.LambdaAction(alarmLambda));
alarm1.addInsufficientDataAction(new actions.LambdaAction(alarmLambda));

alarm2.addAlarmAction(new actions.LambdaAction(alarmLambda));
alarm2.addOkAction(new actions.LambdaAction(alarmLambda));
alarm2.addInsufficientDataAction(new actions.LambdaAction(alarmLambda));

// THEN
Template.fromStack(stack).resourceCountIs('AWS::CloudWatch::Alarm', 2);
Expand Down Expand Up @@ -175,6 +180,9 @@ def handler(event, context):
alarm1.addAlarmAction(new actions.LambdaAction(alarmLambda));

// THEN
expect(() => {
alarm1.addOkAction(new actions.LambdaAction(alarmLambda));
}).toThrow(/There is already a Construct with name 'AlarmPermission' in Function \[alarmLambda\]/);
expect(() => {
alarm2.addAlarmAction(new actions.LambdaAction(alarmLambda));
}).toThrow(/There is already a Construct with name 'AlarmPermission' in Function \[alarmLambda\]/);
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