The CDK Construct Library for AWS Auto-Scaling
This module is part of the AWS Cloud Development Kit project.
Fleet
Auto Scaling Group
An AutoScalingGroup
represents a number of instances on which you run your code. You
pick the size of the fleet, the instance type and the OS image:
import ec2 = require('@aws-cdk/aws-ec2');
new ec2.AutoScalingGroup(stack, 'ASG', {
vpc,
instanceType: new ec2.InstanceTypePair(InstanceClass.Burstable2, InstanceSize.Micro),
machineImage: new ec2.LinuxImage({
'us-east-1': 'ami-97785bed'
})
});
NOTE: AutoScalingGroup has an property called allowAllOutbound
(allowing the instances to contact the
internet) which is set to true
by default. Be sure to set this to false
if you don't want
your instances to be able to start arbitrary connections.
AMIs
AMIs control the OS that gets launched when you start your instance.
Depending on the type of AMI, you select it a different way.
The latest version of Windows images are regionally published under labels,
so you can select Windows images like this:
new ec2.WindowsImage(WindowsVersion.WindowsServer2016EnglishNanoBase)
You can select the latest Amazon Linux image like this:
new ec2.AmazonLinuxImage()
Other Linux images are unfortunately not currently published this way, so you have
to supply a region-to-AMI map when creating a Linux image:
machineImage: new ec2.GenericLinuxImage({
'us-east-1': 'ami-97785bed',
'eu-west-1': 'ami-12345678',
// ...
})
NOTE: Selecting Linux images will change when the information is published in an automatically
consumable way.
Allowing Connections
See the documentation of the aws-ec2 package for more information about allowing
connections between resources backed by instances.
0.10.0 (2018-09-27)
This release introduces a better way to "escape" L2 constructs in case of missing features by adding the ability to add arbitrary overrides for resource properties:
const bucket = new s3.Bucket(this, 'L2Bucket');
// access L1
const bucketResource = bucket.findChild('Resource') as s3.cloudformation.BucketResource;
// strongly-typed overrides
bucketResource.propertyOverrides.bucketName = 'NewBucketName';
// weakly-typed overrides
bucketResource.addPropertyOverride('BucketName', 'NewerBucketName');
Bug Fixes
Code Refactoring
Features
- aws-cloudformation: rename the CodePipeline actions (#771) (007e7b4)
- aws-cloudformation: update the README of the module to reflect the new action names (#775) (6c0e75b), closes #771
- aws-codedeploy: add auto-scaling groups property to ServerDeploymentGroup (#739) (0b28886)
- aws-codedeploy: add deployment configuration construct (#653) (e6b67ad)
- aws-codepipeline, aws-codecommit, aws-s3: change the convention for naming the source Actions to XxxSourceAction (#753) (9c3ce7f)
- aws-elasticloadbalancingv2: support for ALB/NLB (#750) (bd9ee01)
- tagging support for AutoScaling/SecurityGroup (#766) (3d48eb2)
- core: resource overrides (escape hatch) (#784) (5054eef), closes #606
- toolkit: stop creating 'empty' stacks (#779) (1dddd8a)
BREAKING CHANGES TO EXPERIMENTAL FEATURES
- cdk: the constructor signature of
TagManager
has changed. initialTags
is now passed inside a props object. - util:
@aws-cdk/util
is no longer available - aws-elasticloadbalancingv2: adds classes for modeling Application and Network Load Balancers. AutoScalingGroups now implement the interface that makes constructs a load balancing target. The breaking change is that Security Group rule identifiers have been changed in order to make adding rules more reliable. No code changes are necessary but existing deployments may experience unexpected changes.
- aws-cloudformation: this renames all CloudFormation Actions for CodePipeline to bring them in line with Actions defined in other service packages.
- aws-codepipeline, aws-codecommit, aws-s3: change the names of the source Actions from XxxSource to XxxSourceAction. This is to align them with the other Actions, like Build. Also, CodeBuild has the concept of Sources, so it makes sense to strongly differentiate between the two.
CloudFormation Changes