AWS ECS Deploying Containers using Task and Service Definitions

1. What is a task definition within Amazon ECS?
2. What is task and service in ECS?
3. How many containers can be defined in a task definition in ECS?
4. What is service definition in ECS?
5. How do I connect to ECS service?
6. How do I run an ECS task?
7. Does ECS use EC2?
8. What is fargate task?
9. What is a task service?

What is a task definition within Amazon ECS?

A task definition is required to run Docker containers in Amazon ECS. The following are some of the parameters you can specify in a task definition: The Docker image to use with each container in your task. How much CPU and memory to use with each task or each container within a task.

What is task and service in ECS?

Task — This is a running container with the settings defined in the Task Definition. It can be thought of as an “instance” of a Task Definition. Service — Defines long running tasks of the same Task Definition. This can be 1 running container or multiple running containers all using the same Task Definition.

How many containers can be defined in a task definition in ECS?

To prepare your application to run on Amazon ECS, you must create a task definition. The task definition is a text file (in JSON format) that describes one or more containers (up to a maximum of ten) that form your application. The task definition can be thought of as a blueprint for your application.

What is service definition in ECS?

An Amazon ECS service enables you to run and maintain a specified number of instances of a task definition simultaneously in an Amazon ECS cluster.

How do I connect to ECS service?

To connect to your container instance

Open the Amazon ECS console at https://console.aws.amazon.com/ecs/ . Select the cluster that hosts your container instance. On the Cluster page, choose ECS Instances. On the Container Instance column, select the container instance to connect to.

How do I run an ECS task?

Open the Amazon ECS console at https://console.aws.amazon.com/ecs/v2 .

1. On the Clusters page, select the cluster to run the standalone task in.
2. From the Tasks tab, choose Run new task.
3. The Compute configuration section can be expanded to change the compute option for your service to use.

Does ECS use EC2?

No. AWS ECS is just a logical grouping (cluster) of EC2 instances, and all the EC2 instances part of an ECS act as Docker host i.e. ECS can send command to launch a container on them ( EC2 ). If you already have an EC2, and then launch ECS, you'll still have a single instance.

What is fargate task?

Serverless compute for containers. Get started with AWS Fargate. AWS Fargate is a serverless compute engine for containers that works with both Amazon Elastic Container Service (ECS) and Amazon Elastic Kubernetes Service (EKS). Fargate makes it easy for you to focus on building your applications.

What is a task service?

A Service task runs a command or service on all resources that are allocated to the job. New instances of the command start when new resources are added to the job or if a previously running instance exits and the resource that it was running on is still allocated to the job.