How to execute commands on AWS Instance using Boto3

Question

Hi Guys,

I have launched one EC2 instance for Windows. Now I want to run some command in this instance using the boto3 module. How can I do that?

Answer 1

Hi@akhtar,

Boto represents an Amazon Web Services (AWS) SDK that is available for Python. It allows Python developers to design configuration, manage, and configure AWS services, including EC2 as well as S3. Boto provides an easy-to utilize, object-oriented API and also the ability to access low level AWS services. You can even check out the details from the AWS Course.

You can use the boto3 module to do this. Boto3 module has arguments named send_command. It helps you to run commands in EC2 instance.

ssm_client = boto3.client('ssm')
response = ssm_client.send_command(
            InstanceIds=['i-03#####'],
            DocumentName="AWS-RunShellScript",
            Parameters={'commands': ['start ecs']}, )

command_id = response['Command']['CommandId']
output = ssm_client.get_command_invocation(
      CommandId=command_id,
      InstanceId='i-03######',
    )
print(output)

Comments

question akhtar,  if you run multiple instances, how can you make the InstanceId that only allows a string of one instance to work for outputs?

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Suppose i wanna have two commands and command 2 needs the output of command1 , do i need to write two of these functions with both commands seperated or is there any other way?