To Install Docker on Amazon EC2 instance:

Update the installed packages for the instance

sudo yum update -y

Install most recent Docker Community Edition package.

Amazon Linux 2

sudo amazon-linux-extras install docker

Amazon Linux

sudo yum install docker

Start the Docker service

sudo service docker start

Note: Once started you should see two green [OK].

Note: To confirm that its been configured and created the command docker info will display information on the Docker.

Running Docker info you will receive a permission error. We need to add the ec2-user to the Docker group first.

Add the ec2-user to the Docker group to execute Docker commands without using sudo.

sudo usermod -a -G docker ec2-user

Note: If you still receive permission denied. Please restart the instance. May take 1-2 Minutes

After adding ec2-user to the Docker group, you will notice below that you will have all the information on the Docker.
How many Containers
How many are Running
How many Images are showing etc..

Docker info

Logging Setup using Docker Platform

Docker Installation Command

sudo docker run --name='logdna' --restart=always \ -d -v=/var/run/docker.sock:/var/run/docker.sock \ -e LOGDNA_KEY="YOUR INGESTION KEY" \ -e TAGS="logdna" \ logdna/logspout:latest

Note: When you run this command LogDNA will not be found locally. This line - logdna/logspout: latest will always pull down the latest image.