Pass hostPort explicitly in container definitions

aws/aws_test.go

@@ -548,7 +548,7 @@ func containersRuntimeValidator(region string) func(t *testing.T, stackInfo inte
 			if !assert.True(t, exists) {
 				return
 			}
-			if !assert.True(t, len(hellowWorldLogs) > 16) {
+			if !assert.True(t, len(hellowWorldLogs) > 3) {
 				return
 			}
 			assert.Contains(t, getAllMessageText(hellowWorldLogs), "Hello from Docker!")

aws/service.ts

@@ -327,6 +327,16 @@ function computeContainerDefinitions(
             const imageOptions = computeImage(imageName, container, ports, repository);
             const portMappings = (container.ports || []).map(p => ({
                 containerPort: p.targetPort || p.port,
+                // From https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_definition_parameters.html:
+                // > For task definitions that use the awsvpc network mode, you should only specify the containerPort.
+                // > The hostPort can be left blank or it must be the same value as the containerPort.
+                //
+                // However, if left blank, it will be automatically populated by AWS, potentially leading to dirty
+                // diffs even when no changes have been made. Since we are currently always using `awsvpc` mode, we
+                // go ahead and populate it with the same value as `containerPort`.
+                //
+                // See https://github.com/terraform-providers/terraform-provider-aws/issues/3401.
+                hostPort: p.targetPort || p.port,
             }));
 
             // tslint:disable-next-line:max-line-length

examples/containers/index.ts

@@ -164,12 +164,7 @@ api.get("/", async (req, res) => {
 });
 api.get("/run", async (req, res) => {
     try {
-        // Launch 4 instances of the Task.
-        let tasks: Promise<void>[] = [];
-        for (let i = 0; i < 4; i++) {
-            tasks.push(helloTask.run());
-        }
-        await Promise.all(tasks);
+        await helloTask.run();
         res.json({ success: true });
     } catch (err) {
         console.error(errorJSON(err));