feat: Tagging support for AutoScaling/SecurityGroup (#766)

Add support for tagging of AutoScalingGroups and Security Groups.

BREAKING CHANGE: constructor signature of `TagManager` has changed.
`initialTags` is now passed inside a props object.

Author: moofish32

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

@@ -7,6 +7,11 @@ import cdk = require('@aws-cdk/cdk');
 
 import { cloudformation } from './autoscaling.generated';
 
+/**
+ * Name tag constant
+ */
+const NAME_TAG: string = 'Name';
+
 /**
  * Properties of a Fleet
  */
@@ -124,6 +129,11 @@ export interface AutoScalingGroupProps {
      * @default 300 (5 minutes)
      */
     resourceSignalTimeoutSec?: number;
+
+    /**
+     * The AWS resource tags to associate with the ASG.
+     */
+    tags?: cdk.Tags;
 }
 
 /**
@@ -137,7 +147,7 @@ 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 cdk.ITaggable, elb.ILoadBalancerTarget, ec2.IConnectable,
     elbv2.IApplicationLoadBalancerTarget, elbv2.INetworkLoadBalancerTarget {
     /**
      * The type of OS instances of this fleet are running.
@@ -154,6 +164,11 @@ export class AutoScalingGroup extends cdk.Construct implements elb.ILoadBalancer
      */
     public readonly role: iam.Role;
 
+    /**
+     * Manage tags for this construct and children
+     */
+    public readonly tags: cdk.TagManager;
+
     private readonly userDataLines = new Array<string>();
     private readonly autoScalingGroup: cloudformation.AutoScalingGroupResource;
     private readonly securityGroup: ec2.SecurityGroupRef;
@@ -167,6 +182,8 @@ export class AutoScalingGroup extends cdk.Construct implements elb.ILoadBalancer
         this.securityGroup = new ec2.SecurityGroup(this, 'InstanceSecurityGroup', { vpc: props.vpc });
         this.connections = new ec2.Connections({ securityGroup: this.securityGroup });
         this.securityGroups.push(this.securityGroup);
+        this.tags = new TagManager(this, {initialTags: props.tags});
+        this.tags.setTag(NAME_TAG, this.path, { overwrite: false });
 
         if (props.allowAllOutbound !== false) {
             this.connections.allowTo(new ec2.AnyIPv4(), new ec2.AllConnections(), 'Outbound traffic allowed by default');
@@ -211,6 +228,7 @@ export class AutoScalingGroup extends cdk.Construct implements elb.ILoadBalancer
             launchConfigurationName: launchConfig.ref,
             loadBalancerNames: new cdk.Token(() => this.loadBalancerNames.length > 0 ? this.loadBalancerNames : undefined),
             targetGroupArns: new cdk.Token(() => this.targetGroupArns.length > 0 ? this.targetGroupArns : undefined),
+            tags: this.tags,
         };
 
         if (props.notificationsTopic) {
@@ -472,6 +490,16 @@ function renderRollingUpdateConfig(config: RollingUpdateConfiguration = {}): cdk
     };
 }
 
+class TagManager extends cdk.TagManager {
+    protected tagFormatResolve(tagGroups: cdk.TagGroups): any {
+        const tags = {...tagGroups.nonStickyTags, ...tagGroups.ancestorTags, ...tagGroups.stickyTags};
+        return Object.keys(tags).map( (key) => {
+            const propagateAtLaunch = !!tagGroups.propagateTags[key] || !!tagGroups.ancestorTags[key];
+            return {key, value: tags[key], propagateAtLaunch};
+        });
+    }
+}
+
 /**
  * Render a number of seconds to a PTnX string.
  */

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

@@ -453,6 +453,12 @@
           }
         ],
         "SecurityGroupIngress": [],
+        "Tags": [
+          {
+            "Key": "Name",
+            "Value": "aws-cdk-ec2-integ/Fleet"
+          }
+        ],
         "VpcId": {
           "Ref": "VPCB9E5F0B4"
         }
@@ -544,6 +550,13 @@
             "Ref": "LB8A12904C"
           }
         ],
+        "Tags": [
+          {
+            "Key": "Name",
+            "PropagateAtLaunch": true,
+            "Value": "aws-cdk-ec2-integ/Fleet"
+          }
+        ],
         "VPCZoneIdentifier": [
           {
             "Ref": "VPCPrivateSubnet1Subnet8BCA10E0"
@@ -576,6 +589,7 @@
             "ToPort": 80
           }
         ],
+        "Tags": [],
         "VpcId": {
           "Ref": "VPCB9E5F0B4"
         }

Diff for: packages/@aws-cdk/aws-autoscaling/test/integ.asg-w-elbv2.expected.json

@@ -319,6 +319,12 @@
           }
         ],
         "SecurityGroupIngress": [],
+        "Tags": [
+          {
+            "Key": "Name",
+            "Value": "aws-cdk-ec2-integ/Fleet"
+          }
+        ],
         "VpcId": {
           "Ref": "VPCB9E5F0B4"
         }
@@ -405,6 +411,13 @@
         "LaunchConfigurationName": {
           "Ref": "FleetLaunchConfig59F79D36"
         },
+        "Tags": [
+          {
+            "Key": "Name",
+            "PropagateAtLaunch": true,
+            "Value": "aws-cdk-ec2-integ/Fleet"
+          }
+        ],
         "TargetGroupARNs": [
           {
             "Ref": "LBListenerTargetGroupF04FCF6D"
@@ -463,6 +476,7 @@
             "ToPort": 80
           }
         ],
+        "Tags": [],
         "VpcId": {
           "Ref": "VPCB9E5F0B4"
         }