使用 aws sdk 在 EC2 实例上启动和安装应用程序

Question

I don't know If this will be possible at the first place.

The requirement is to launch ec2 instance using aws sdk (I know this is possible) using based on some application login.

Then I wanted to install some application on the newly launched instance let's say docker.

Is this possible using sdk? Or My idea itself is wrong and there is a better solution to the scenario?

Can i run a command on a Running instance using SDK?

Answer 1

Yes you can install anything on EC2 when it is launched by providing script/commands in userdata section. This is also possible from AWS SDK https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_UserData.html

you can pass command like yum install docker in userdata

UserData='yum install docker'

Answer 2

installing applications uysing cmd on a running command is possible using boto3.

ssm_client = boto3.client('ssm')
response = ssm_client.send_command(
            InstanceIds=['i-xxxxxxx'],
            DocumentName="AWS-RunShellScript",
            Parameters={'commands': ['echo "abc" > 1.txt']}, )

command_id = response['Command']['CommandId']
output = ssm_client.get_command_invocation(
      CommandId=command_id,
      InstanceId='i-xxxxxxxx',
    )
print(output)

ssm client Runs commands on one or more managed instances.

You can also optimize this using function

def execute_commands(ssm_client, command, instance_id):
   

    response = client.send_command(
        DocumentName="AWS-RunShellScript", #preconfigured documents
        Parameters={'commands': commands},
        InstanceIds=instance_ids,
    )
    return resp

ssm_client = boto3.client('ssm') 
commands = ['ifconfig']
instance_ids = ['i-xxxxxxxx']
execute_commands_on_linux_instances(ssm_client, commands, instance_ids)