I am trying to send command to a running ubuntu ec2 instance. I have configured the appropriate role and I have an ssm agent running on the ec2 instance. Using the boto3 SDK I am able to use the client.send_command() function to successfully send a shell command and was subsequently able to get the command Id. Now the challenge is polling for the result. I am trying to use the client.get_command_invocation() function but keep getting a InvocationDoesNotExist error. I am confident that I am using the correct command ID and instance ID because I have tested these using the AWS CLI as in aws ssm list-command-invocations --command-id #### --instance-id i-##### and this worked. Here is a snippet of my code:
`ssm_client = boto3.client('ssm')
target_id = "i-####"
response = ssm_client.send_command(
InstanceIds=[
target_id
],
DocumentName="AWS-RunShellScript",
Comment="Code to run" ,
Parameters={
"commands": ["ls -l"]
}
)
cmd_id= response['Command']['CommandId']
response = ssm_client.get_command_invocation(CommandId=cmd_id,
InstanceId=target_id)
print(response)`
Here is the returned error:
botocore.errorfactory.InvocationDoesNotExist: An error occurred (InvocationDoesNotExist) when calling the GetCommandInvocation operation
Thanks in advance.
I had the same issue, I fixed it by adding a time.sleep() call before calling get_command_invocation(). A short delay should be enough.
Just add these 2 line.
import time
time.sleep(2)
Then It'll work properly generally it take only 0.65sec but it's better to give 2 sec. To make it better you can add some cool stuffs like some print statement in for loop and sleep inside it something like that.