如何使用 AWS CLI 在 EC2 中执行 linux 命令

Question

I have some EC2 instances running on AWS. I am able to get the instance details and start and stop the instance using the AWS CLI command. I was looking for a way to execute a few Linux commands inside the AWS EC2 instances using CLI.

Actually, I am creating a Jenkins pipeline which stops and starts the EC2 instance using AWS CLI. But I also need to execute a few commands after the EC2 is started.

I tried using the aws ssm send-command but it seems this command is not working for me. I tried the below example command and got the error.

aws ssm send-command \
    --instance-ids "instance-ID" \
    --document-name "AWS-RunShellScript" \
    --comment "IP config" \
    --parameters commands=ifconfig \
    --output text

Error:

An error occurred (InvalidInstanceId) when calling the SendCommand operation: Instances [[i-xxxx]] not in a valid state for account XXXXXXXX

Is there any alternate approach to executing commands using AWS CLI?

Answer 1

Is your EC2 instance viewable in Systems Manager? You won't be able to use aws ssm send-command if your EC2 instance can't talk to Systems Manager.

Make sure your EC2 instance has the following roles:

• AmazonSSMManagedInstanceCore`

Make sure you EC2 can access the following internet domains (or VPC endpoints):

• ssm.[region].amazonaws.com
• ec2messages.[region].amazonaws.com
• ssmmessages.[region].amazonaws.com