How to run containers on EC2 in ECS ?

Question

I referred to https://docs.aws.amazon.com/zh_tw/AmazonECS/latest/developerguide/getting-started-fargate.html and have successfully run it on Fargate. However, I want to modify it to run on EC2, but I failed. In the Task interface, I see the last status constantly in Provisioning. How can I proceed to successfully run it on EC2? The steps I failed are as follows:

Modify the requiresCompatibilities section to EC2.
Add an Auto Scaling Group (ASG) with Min Size: 0, Max Size: 3, Desired size: 0, AMI: Amazon Linux 2023 (X86_64), Instance type: t2.medium.
In the Infrastructure, add ASG capacity providers.
Create a service:

In Compute configuration (advanced), choose Capacity provider strategy.
Select the ASG capacity providers added in step 3, with Base: 0 and Weight: 1.
For Deployment configuration, select Application type as Service.
Desired tasks: 1.

Below is the modified configuration file.

{
    "family": "sample-ec2", 
    "networkMode": "awsvpc", 
    "containerDefinitions": [
        {
            "name": "ec2-app", 
            "image": "public.ecr.aws/docker/library/httpd:latest", 
            "portMappings": [
                {
                    "containerPort": 80, 
                    "hostPort": 80, 
                    "protocol": "tcp"
                }
            ], 
            "essential": true, 
            "entryPoint": [
                "sh",
		"-c"
            ], 
            "command": [
                "/bin/sh -c \"echo '<html> <head> <title>Amazon ECS Sample App</title> <style>body {margin-top: 40px; background-color: #333;} </style> </head><body> <div style=color:white;text-align:center> <h1>Amazon ECS Sample App</h1> <h2>Congratulations!</h2> <p>Your application is now running on a container in Amazon ECS.</p> </div></body></html>' >  /usr/local/apache2/htdocs/index.html && httpd-foreground\""
            ]
        }
    ], 
    "requiresCompatibilities": [
        "EC2"
    ], 
    "cpu": "256", 
    "memory": "512"
}

Amazon ECS Sample App

Congratulations!

Your application is now running on a container in Amazon ECS.

' > /usr/local/apache2/htdocs/index.html && httpd-foreground\"" ] } ], "requiresCompatibilities": [ "EC2" ], "cpu": "256", "memory": "512" } ```

Riku_Kobayashi · Accepted Answer

Hello.

First, try creating an EC2 launch type ECS cluster by following the steps in the document below.  
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/create-ec2-cluster-console-v2.html

Also, were there any errors when you started the ECS task?

kerokero · Answer

Currently, ECS can work on EC2, so I propose updating the solution to this issue as follows:

1. Modify the AMI of Launch Templates to Amazon ECS-Optimized Amazon Linux 2023 (AL2023) x86_64 AMI instead of the commonly used Amazon Linux 2023.
2. Switch to larger EC2 instances. I suspect this is related to ECS requiring additional operational resources.
3. Adjust Task definitions by adding "cpu": 1024, "memory": 2048. Although I have already defined "cpu": "1024", "memory": "2048", I still need to define them again. I am unsure why this is necessary. I referred to https://docs.aws.amazon.com/zh_tw/AmazonECS/latest/developerguide/getting-started-ecs-ec2-v2.html and noticed it defines them twice. Hence, I followed suit. If anyone knows the reason behind this, please enlighten me.

How to run containers on EC2 in ECS ?

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