Variable assignment inside AWS ssm does not work

Question

I am trying to run below command on AWS SSM:

Parameters = @{
           commands = @(
           "Write-Host userid is  $userID password $($password)"
           '$userID2 = $userID'
           '$password2 = $password'
           "Write-Host userid is  $userID2 password $($password2)"
       ) 
        }

First Write-Host statement prints the correct values of $userID and $password but after the assignment of the new variable, second Write-Host variable prints empty for both variables. Am I doing something wrong? I tried fetching the values of $userID and $password with double quotes as well but no luck.

score 0 · Answer 1 · answered Jul 28 '20 at 08:31

For anyone facing the same issue. Problem is that before sending the commands to EC2, AWS will replace the commands with all variable values and hence, we cannot reuse the variables inside the commands directly. This is the workaround I had to come up with:

$userID = 'testuser1'
$password = 'testpassword'
$userIdString = "`$userID2 = '$userID'"
$passwordString = "`$password2 = '$password'"

Parameters = @{
           commands = @(
           "Write-Host userid is  $userID password $($password)"
           "$userIdString"
           "$passwordString"
           "Write-Host userid is  $userID2 password $($password2)"
       ) 
        }

Now it prints the $userID2 and $password2 fine.

Variable assignment inside AWS ssm does not work

1 Answers1