In this lab we will learn how to build and run a containerized application. We will then use the Amazon Elastic Container Service to host and run this container in the Cloud.

This is the architecture the lab will be using. There is currently a version of this architecture deployed for you in the cloud. In this lab we will be deploying a new version of our containerized application onto this cluster.

Go to Cloud9 on the AWS Web console - this is your IDE in the cloud. You can also you local IDE for all the steps of this lab.

• On top right corner - Switch to Oregon

• On the left hand pane click on "Shared With You"

Open the "ECS Lab Cloud 9 Env" By clicking on Open IDE

Once Inside Cloud9 - Open the Terminal & cd to the correct folder

$ cd ~/environment/devlabs2018/

Install and run docker

$ sudo yum update -y

$ sudo yum install -y docker

$ sudo service docker start

$ sudo usermod -a -G docker ec2-user

Check if docker is installed and running corectly

$ docker info

Open the index.html file inside the Dev Labs folder and edit the Write something here

The next person will read what you put in so please be respectful

• Save your edited HTML File

Build a container Image from the DockerFile

$ docker build -t staticsite:1.0 DockerStaticSite-master/

Run Container from freshly built Image

$ docker run -itd \--name mycontainer \--publish 8080:80 staticsite:1.0

Test if Container is Running

$ curl http://localhost:8080

If u get a html page as a response, then the container is running successfully! Well done.

Now that your containerized application is running locally, let's push your docker image to a ECR (Elastic Container Repository) repository in the cloud

Navigate to the ECS (Elastic Container Service) console and Click on Repositories

Click on "ecs-lab-repo"

Click on " View Push Commands "

You will see a set of commands

Go back to cloud9 cd into the correct folder

$ cd DockerStaticSite-master/

Login to ECR using (The quotes in the command are important)

$ `aws ecr get-login --no-include-email --region us-west-2`

Follow the steps 3, 4 & 5 of the Push Commands to build and push the modified image

*If facing issues - Make sure you've done step 2

Once the push is completed your docker image will be pushed to an ECR image repository on AWS

An ECS cluster is already provisioned for you. The cluster is currently running a previous version of the same application. You will now Deploy the your new application Version to the service

Navigate to the Elastic Container Service Dashboard.

In the navigation menu on the left, click Task Definitions.

• Select the simplewebtask

• checkmark simplewebtask

• Click Create New Revision

• Scroll to the bottom of the page, then click Create

This will create a new version of the Task. Note the Version Number. The new version will use the latest container image. i.e. the image that you just pushed.

• In the left navigation pane, click Clusters.

• In the Clusters window, click default >.

This is the cluster that your service resides in.

• On the Services tab, check webService

• Click Update then click on Revision

• Revision: select the latest version that you just created

• Force New Deployment -- Check this box & turn it on

• Click Next Step

• On Step 2, click Next Step

• On Step 3, click Next Step

• On Step 4, click Update Service

This will deploy a new version of the application.

• On the Launch Status page, click View Service

• On the Service: myService page, click the Events tab.

Wait a few minutes. Monitor the process of draining connections and stopping tasks till the service reaches a steady state.

You may need to click the Refresh button to see the new events.

Once the events says "service webService has reached a steady state."

• Click the Deployments tab.

• Click on myLoadBalancer

• Paste in the Load Balancer's DNS name to see the new version of the app running in the cloud

Congratulations! Your Containerized web application is Now Running in the cloud

$ chmod +x Reset,sh

$ ./Reset.sh

https://docs.aws.amazon.com/AmazonECS/latest/developerguide/docker-basics.html

https://docs.aws.amazon.com/AmazonECS/latest/developerguide/Welcome.html

https://docs.aws.amazon.com/AmazonECS/latest/developerguide/AWS_Fargate.html