AWS CloudWatch logs only showing a single STDOUT output

Question

I want to gather some information from my Windows EC2 instances. I pieced together from searches that I could write a powershell script and have the output directed to CloudWatch logs. So I created a script and which I launched via Run command AWS-RunPowerShellScript "Enabled CloudWatch Logs" I targeted multiple instances. However when I review the CloudWatch logs I only see the output of one instance (presumably the last one overwrites the former)

Any ideas?

Script:

$pvInfo = Get-WmiObject -Class Win32_Product | where Name -eq "AWS PV Drivers" | select Name, Version
$pvInfo | Add-Member -MemberType NoteProperty -Name "ComputerName" -Force -Value $env:COMPUTERNAME
$pvInfo

Sample Output:

I want to see a line for each server, eg..

Name           Version ComputerName   
----           ------- ------------   
AWS PV Drivers 8.4.0   SERVERX
AWS PV Drivers 8.2.0   SERVERY
AWS PV Drivers 7.4.0   SMALLSERVER
AWS PV Drivers 8.6.0   ANOTHERSERVER
AWS PV Drivers 6.4.0   EXAMPLESERVER
AWS PV Drivers 8.4.0   BIGSERVER

Answer 1

Based on your description, i believe CWL would create a logstream for each instance in the format CommandID/InstanceID/PluginID in the log group you specified when configuring/executing the SSM command.

Check the SSM console and look for the execution history - i suspect the command only executed successfully on 1 instance if you only see 1 stream inside the log group level of CWL.