Can't flip valid YAML

[mrichman]

I get an error when using this UserData:

      UserData:
        Fn::Base64: !Sub |
        #!/bin/bash -xe
        echo "WaitHandle '${WaitHandle}'"
        /bin/echo '%password%' | /bin/passwd cloud_user --stdin
        yum update -y
        yum install python3 -y
        su - cloud_user -c 'aws configure set region us-east-1'
        su - cloud_user -c 'python3 -m pip install boto3'
        /opt/aws/bin/cfn-signal -e $? -r "UserData script complete" '${WaitHandle}'

Error:

Error: while scanning a simple key
  in "<unicode string>", line 129, column 9:
            echo "WaitHandle '${WaitHandle}'"
            ^
could not find expected ':'
  in "<unicode string>", line 130, column 9:
            yum update -y

[koiker]

I run the sample yaml script and got the same results.
I will troubleshoot that. Probably the the ${placeholder} is being affected by python yaml library

[mrichman]

I got it to work by indenting #!/bin/bash -xe ... which is not something I've had to do before.

[koiker]

Yep, in this format worked correctly:

UserData:
  Fn::Base64: !Sub |
    #!/bin/bash -xe
    echo "WaitHandle '${WaitHandle}'"
    /bin/echo '%password%' | /bin/passwd cloud_user --stdin
    yum update -y
    yum install python3 -y
    su - cloud_user -c 'aws configure set region us-east-1'
    su - cloud_user -c 'python3 -m pip install boto3'
    /opt/aws/bin/cfn-signal -e $? -r "UserData script complete" '${WaitHandle}'

[mrichman]

Strange that I've never had to do this indent before, but now that I know the workaround I'm good.