如何为 AWS EC2 实例运行自定义设置？

Question

I have seen this is possible in GCP and other clouds, but the "Advanced details" section in AWS EC2 doesn't seem to do anything to me.

I want to ensure I have the latest security dependencies and install custom monitoring agents.

I have tried pasting my scripts or pre-setup commands in the "User data" section. I don't see any sign of this being executed in the background. I check the history, running processes, and monitoring section.

My question is, how to do it for AWS EC2? Is the approach different compared to other clouds?

NOTE: In GCP, there is both pre-config and post-config script.

UPDATE 1:

export ENV=test
sudo yum update -y
sudo yum install docker -y

aws s3 cp s3://app-deployment-my-app/ec2-runner-$ENV.sh ec2-runner.sh
sudo systemctl start docker
sudo sh ec2-runner.sh
sudo chmod +x ec2-runner.sh
sudo /bin/bash -c 'echo "*/5 * * * * ec2-user sh /home/ec2-user/ec2-runner.sh" >> /etc/crontab'
sudo systemctl restart crond.service

Answer 1

Cloud-init takes multiple user-data formats . If you want your user-data to be interpreted as a Unix script then it must begin with #!