feat(aws-elasticloadbalancingv2): support for ALB/NLB (#750)

BREAKING CHANGE: 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.

Author: rix0rrr

build.sh

@@ -1,6 +1,27 @@
 #!/bin/bash
 set -euo pipefail
 
+bail="--no-bail"
+while [[ "${1:-}" != "" ]]; do
+    case $1 in
+        -h|--help)
+            echo "Usage: build.sh [--bail|-b] [--force|-f]"
+            exit 1
+            ;;
+        -b|--bail)
+            bail="--bail"
+            ;;
+        -f|--force)
+            export CDK_BUILD="--force"
+            ;;
+        *)
+            echo "Unrecognized parameter: $1"
+            exit 1
+            ;;
+    esac
+    shift
+done
+
 if [ ! -d node_modules ]; then
     /bin/bash ./install.sh
 fi
@@ -24,10 +45,10 @@ trap "rm -rf $MERKLE_BUILD_CACHE" EXIT
 
 echo "============================================================================================="
 echo "building..."
-time lerna run --no-bail --stream build || fail
+time lerna run $bail --stream build || fail
 
 echo "============================================================================================="
 echo "testing..."
-lerna run --no-bail --stream test || fail
+lerna run $bail --stream test || fail
 
 touch $BUILD_INDICATOR

packages/@aws-cdk/aws-autoscaling/lib/auto-scaling-group.ts

@@ -1,5 +1,6 @@
 import ec2 = require('@aws-cdk/aws-ec2');
 import elb = require('@aws-cdk/aws-elasticloadbalancing');
+import elbv2 = require('@aws-cdk/aws-elasticloadbalancingv2');
 import iam = require('@aws-cdk/aws-iam');
 import sns = require('@aws-cdk/aws-sns');
 import cdk = require('@aws-cdk/cdk');
@@ -136,7 +137,8 @@ export interface AutoScalingGroupProps {
  *
  * The ASG spans all availability zones.
  */
-export class AutoScalingGroup extends cdk.Construct implements elb.ILoadBalancerTarget, ec2.IConnectable {
+export class AutoScalingGroup extends cdk.Construct implements elb.ILoadBalancerTarget, ec2.IConnectable,
+    elbv2.IApplicationLoadBalancerTarget, elbv2.INetworkLoadBalancerTarget {
     /**
      * The type of OS instances of this fleet are running.
      */
@@ -157,6 +159,7 @@ export class AutoScalingGroup extends cdk.Construct implements elb.ILoadBalancer
     private readonly securityGroup: ec2.SecurityGroupRef;
     private readonly securityGroups: ec2.SecurityGroupRef[] = [];
     private readonly loadBalancerNames: string[] = [];
+    private readonly targetGroupArns: string[] = [];
 
     constructor(parent: cdk.Construct, name: string, props: AutoScalingGroupProps) {
         super(parent, name);
@@ -206,7 +209,8 @@ export class AutoScalingGroup extends cdk.Construct implements elb.ILoadBalancer
             maxSize: maxSize.toString(),
             desiredCapacity: desiredCapacity.toString(),
             launchConfigurationName: launchConfig.ref,
-            loadBalancerNames: new cdk.Token(() => this.loadBalancerNames),
+            loadBalancerNames: new cdk.Token(() => this.loadBalancerNames.length > 0 ? this.loadBalancerNames : undefined),
+            targetGroupArns: new cdk.Token(() => this.targetGroupArns.length > 0 ? this.targetGroupArns : undefined),
         };
 
         if (props.notificationsTopic) {
@@ -241,10 +245,30 @@ export class AutoScalingGroup extends cdk.Construct implements elb.ILoadBalancer
         this.securityGroups.push(securityGroup);
     }
 
+    /**
+     * Attach to a classic load balancer
+     */
     public attachToClassicLB(loadBalancer: elb.LoadBalancer): void {
         this.loadBalancerNames.push(loadBalancer.loadBalancerName);
     }
 
+    /**
+     * Attach to ELBv2 Application Target Group
+     */
+    public attachToApplicationTargetGroup(targetGroup: elbv2.ApplicationTargetGroup): elbv2.LoadBalancerTargetProps {
+        this.targetGroupArns.push(targetGroup.targetGroupArn);
+        targetGroup.registerConnectable(this);
+        return { targetType: elbv2.TargetType.SelfRegistering };
+    }
+
+    /**
+     * Attach to ELBv2 Application Target Group
+     */
+    public attachToNetworkTargetGroup(targetGroup: elbv2.NetworkTargetGroup): elbv2.LoadBalancerTargetProps {
+        this.targetGroupArns.push(targetGroup.targetGroupArn);
+        return { targetType: elbv2.TargetType.SelfRegistering };
+    }
+
     /**
      * Add command to the startup script of fleet instances.
      * The command must be in the scripting language supported by the fleet's OS (i.e. Linux/Windows).

packages/@aws-cdk/aws-autoscaling/package.json

@@ -61,6 +61,7 @@
   "dependencies": {
     "@aws-cdk/aws-ec2": "^0.9.2",
     "@aws-cdk/aws-elasticloadbalancing": "^0.9.2",
+    "@aws-cdk/aws-elasticloadbalancingv2": "^0.9.2",
     "@aws-cdk/aws-iam": "^0.9.2",
     "@aws-cdk/aws-sns": "^0.9.2",
     "@aws-cdk/cdk": "^0.9.2"

packages/@aws-cdk/aws-autoscaling/test/integ.asg-w-loadbalancer.expected.json packages/@aws-cdk/aws-autoscaling/test/integ.asg-w-classic-loadbalancer.expected.json

@@ -458,7 +458,7 @@
         }
       }
     },
-    "FleetInstanceSecurityGroupPort80LBtofleetDC12B17A": {
+    "FleetInstanceSecurityGroupfromawscdkec2integLBSecurityGroupDEF4F99A8025E910CB": {
       "Type": "AWS::EC2::SecurityGroupIngress",
       "Properties": {
         "IpProtocol": "tcp",
@@ -581,7 +581,7 @@
         }
       }
     },
-    "LBSecurityGroupPort80LBtofleet0986F2E8": {
+    "LBSecurityGrouptoawscdkec2integFleetInstanceSecurityGroupB03BE84D80B371C596": {
       "Type": "AWS::EC2::SecurityGroupEgress",
       "Properties": {
         "GroupId": {