How to use @aws-cdk/aws-autoscaling - 6 common examples
To help you get started, we’ve selected a few @aws-cdk/aws-autoscaling examples, based on popular ways it is used in public projects.
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aws / aws-cdk / packages / @aws-cdk / aws-ecs / lib / drain-hook / instance-drain-hook.ts View on Github 
const fn = new lambda.Function(this, 'Function', {
code: lambda.Code.fromInline(fs.readFileSync(path.join(__dirname, 'lambda-source', 'index.py'), { encoding: 'utf-8' })),
handler: 'index.lambda_handler',
runtime: lambda.Runtime.PYTHON_3_6,
// Timeout: some extra margin for additional API calls made by the Lambda,
// up to a maximum of 15 minutes.
timeout: cdk.Duration.seconds(Math.min(drainTime.toSeconds() + 10, 900)),
environment: {
CLUSTER: props.cluster.clusterName
}
});
// Hook everything up: ASG -> Topic, Topic -> Lambda
props.autoScalingGroup.addLifecycleHook('DrainHook', {
lifecycleTransition: autoscaling.LifecycleTransition.INSTANCE_TERMINATING,
defaultResult: autoscaling.DefaultResult.CONTINUE,
notificationTarget: new hooks.FunctionHook(fn),
heartbeatTimeout: drainTime,
});
// Describe actions cannot be restricted and restrict the CompleteLifecycleAction to the ASG arn
// https://docs.aws.amazon.com/autoscaling/ec2/userguide/control-access-using-iam.html
fn.addToRolePolicy(new iam.PolicyStatement({
actions: [
'ec2:DescribeInstances',
'ec2:DescribeInstanceAttribute',
'ec2:DescribeInstanceStatus',
'ec2:DescribeHosts'
],
resources: ['*']
}));// Invoke Lambda via SNS Topic
const fn = new lambda.Function(this, 'Function', {
code: lambda.Code.fromInline(fs.readFileSync(path.join(__dirname, 'lambda-source', 'index.py'), { encoding: 'utf-8' })),
handler: 'index.lambda_handler',
runtime: lambda.Runtime.PYTHON_3_6,
// Timeout: some extra margin for additional API calls made by the Lambda,
// up to a maximum of 15 minutes.
timeout: cdk.Duration.seconds(Math.min(drainTime.toSeconds() + 10, 900)),
environment: {
CLUSTER: props.cluster.clusterName
}
});
// Hook everything up: ASG -> Topic, Topic -> Lambda
props.autoScalingGroup.addLifecycleHook('DrainHook', {
lifecycleTransition: autoscaling.LifecycleTransition.INSTANCE_TERMINATING,
defaultResult: autoscaling.DefaultResult.CONTINUE,
notificationTarget: new hooks.FunctionHook(fn),
heartbeatTimeout: drainTime,
});
// Describe actions cannot be restricted and restrict the CompleteLifecycleAction to the ASG arn
// https://docs.aws.amazon.com/autoscaling/ec2/userguide/control-access-using-iam.html
fn.addToRolePolicy(new iam.PolicyStatement({
actions: [
'ec2:DescribeInstances',
'ec2:DescribeInstanceAttribute',
'ec2:DescribeInstanceStatus',
'ec2:DescribeHosts'
],
resources: ['*']
}));public addCapacity(id: string, options: AddCapacityOptions): autoscaling.AutoScalingGroup {
const autoScalingGroup = new autoscaling.AutoScalingGroup(this, id, {
...options,
vpc: this.vpc,
machineImage: options.machineImage || new EcsOptimizedAmi(),
updateType: options.updateType || autoscaling.UpdateType.REPLACING_UPDATE,
instanceType: options.instanceType,
});
this.addAutoScalingGroup(autoScalingGroup, options);
return autoScalingGroup;
}public addCapacity(id: string, options: CapacityOptions): autoscaling.AutoScalingGroup {
const asg = new autoscaling.AutoScalingGroup(this, id, {
...options,
vpc: this.vpc,
machineImage: new EksOptimizedImage({
nodeType: nodeTypeForInstanceType(options.instanceType),
kubernetesVersion: this.version,
}),
updateType: options.updateType || autoscaling.UpdateType.ROLLING_UPDATE,
instanceType: options.instanceType,
});
this.addAutoScalingGroup(asg, {
mapRole: options.mapRole,
bootstrapOptions: options.bootstrapOptions,
bootstrapEnabled: options.bootstrapEnabled
});public addCapacity(id: string, options: CapacityOptions): autoscaling.AutoScalingGroup {
const asg = new autoscaling.AutoScalingGroup(this, id, {
...options,
vpc: this.vpc,
machineImage: new EksOptimizedImage({
nodeType: nodeTypeForInstanceType(options.instanceType),
kubernetesVersion: this.version,
}),
updateType: options.updateType || autoscaling.UpdateType.ROLLING_UPDATE,
instanceType: options.instanceType,
});
this.addAutoScalingGroup(asg, {
mapRole: options.mapRole,
bootstrapOptions: options.bootstrapOptions,
bootstrapEnabled: options.bootstrapEnabled
});
return asg;
}public addCapacity(id: string, options: AddCapacityOptions): autoscaling.AutoScalingGroup {
const autoScalingGroup = new autoscaling.AutoScalingGroup(this, id, {
...options,
vpc: this.vpc,
machineImage: options.machineImage || new EcsOptimizedAmi(),
updateType: options.updateType || autoscaling.UpdateType.REPLACING_UPDATE,
instanceType: options.instanceType,
});
this.addAutoScalingGroup(autoScalingGroup, options);
return autoScalingGroup;
}@aws-cdk/aws-autoscaling
The CDK Construct Library for AWS::AutoScaling
