feat(ecs-patterns): LoadBalancedFargateService - allow specifying containerName and role (#2764)

Implementation of execution tests, task role and container name overrides + tests

Author: DavidChristiansen

packages/@aws-cdk/aws-ecs-patterns/lib/fargate/load-balanced-fargate-service.ts

@@ -1,4 +1,5 @@
 import ecs = require('@aws-cdk/aws-ecs');
+import iam = require('@aws-cdk/aws-iam');
 import cdk = require('@aws-cdk/cdk');
 import { LoadBalancedServiceBase, LoadBalancedServiceBaseProps } from '../base/load-balanced-service-base';
 
@@ -42,6 +43,34 @@ export interface LoadBalancedFargateServiceProps extends LoadBalancedServiceBase
    * @default 512
    */
   readonly memoryLimitMiB?: number;
+
+  /**
+   * Override for the Fargate Task Definition execution role
+   *
+   * @default - No value
+   */
+  readonly executionRole?: iam.IRole;
+
+  /**
+   * Override for the Fargate Task Definition task role
+   *
+   * @default - No value
+   */
+  readonly taskRole?: iam.IRole;
+
+  /**
+   * Override value for the container name
+   *
+   * @default - No value
+   */
+  readonly containerName?: string;
+
+  /**
+   * Override value for the service name
+   *
+   * @default - No value
+   */
+  readonly serviceName?: string;
 }
 
 /**
@@ -59,10 +88,14 @@ export class LoadBalancedFargateService extends LoadBalancedServiceBase {
 
     const taskDefinition = new ecs.FargateTaskDefinition(this, 'TaskDef', {
       memoryLimitMiB: props.memoryLimitMiB,
-      cpu: props.cpu
+      cpu: props.cpu,
+      executionRole: props.executionRole !== undefined ? props.executionRole : undefined,
+      taskRole: props.taskRole !== undefined ? props.taskRole : undefined
     });
 
-    const container = taskDefinition.addContainer('web', {
+    const containerName = props.containerName !== undefined ? props.containerName : 'web';
+
+    const container = taskDefinition.addContainer(containerName, {
       image: props.image,
       logging: this.logDriver,
       environment: props.environment
@@ -71,13 +104,13 @@ export class LoadBalancedFargateService extends LoadBalancedServiceBase {
     container.addPortMappings({
       containerPort: props.containerPort || 80,
     });
-
     const assignPublicIp = props.publicTasks !== undefined ? props.publicTasks : false;
     const service = new ecs.FargateService(this, "Service", {
       cluster: props.cluster,
       desiredCount: props.desiredCount || 1,
       taskDefinition,
-      assignPublicIp
+      assignPublicIp,
+      serviceName: props.serviceName || undefined
     });
     this.service = service;