Create AWS Elastic Container Service ECS Task definitions — Step 9

Photo by Katie Smith on Unsplash

Let’s prep things and put the oven in pre heat mode. Its time to cook.

This story is part of a series “Initial Commit till Running on Cloud”.

We are going to create task definitions in ECS for each deployable component we have developed. Task definitions are like the manifests we create in kubernetes. It has configurations of which docker image to run, name of the task, memory and CPU requirements, log configuration, environment variables among other important things.

Navigate to ECS and select Task Definitions

Click Create new Task Definition button to begin configuring the tasks for all our deployable components.

Select EC2 as we will be deploying our tasks in EC2 instances

Populate the fields mentioned in the screenshots below and leave others with default.

Type Task Definition Name exactly the same as repository
Selecting Task memory and Task CPU is based on our application’s demand

I have selected 1024 because, I don’t need much CPU as it is a simple application. And if the EC2 instance I am running this task has 2 virtual CPU then I can run 2 tasks in the same EC2 instance. Also 424 is a number below the actual available RAM of t3a.nano instance. So if we run this task it will have a memory and CPU reservation as mentioned. If the EC2 instance has 454 MB RAM space then 30MB RAM will be free when u deploy this task in it.

No more configurations in the main page apart from these settings.

Click on Add Container to finish the task configuration

Add container will open up a popup frame where we will add details about the docker image, soft limits on CPU and memory, environment variables and logs configuration.

Fill in Container name, Image, Memory Limits and Port mappings
Enter CPU units lesser than reserved units
Create environment variables will be explained in detail
Finally check the Auto-configure CloudWatch Logs and we are done

Click on Add in the popup and then click on Create in the main page.

Environment Variables

Configure the following environment variables in respective task definitions. For mongo DB replace the uri with your mongo atlas account info.

awesome-app-user-microservice = mongodb+srv://

awesome-app-bff = mongodb+srv:// =

awesome-app-api-gateway =

We will replace with actual ELB hostname once we deploy the VPC to cloud. Which actually is the next part of our tutorial :)

Going good? Please read the next part of this series. Also kindly leave your feedback :)




Father, Software Architect and a Story teller

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Richy Great

Richy Great

Father, Software Architect and a Story teller

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