Introduction:

cloudinit-inject was created to provide a method of injecting user-data scripts into CloudFormation files. An example use case would be a CloudFormation file that contains either an EC2 or LaunchConfig type resource that contains a user-data property. Rather than painstakingly copy and paste the userdata script (oftentimes a shell script) into the userdata property, cloudinit-inject can do this instead.

Directions For Use:

Preparation for Use:

For each EC2 or LaunchConfig resource in a CloudFormation file create a shell script named $resourcename_userdata.sh where $resourcename is the name of a given resource. When running cloudinit-inject-userdata.py these userdata files will be associated with the similarly named resource and injected into the given resource's "userdata" property. For example, if an EC2 resource named my_ec2_instance is found in a CloudFormation file, cloudinit-inject-userdata.py will attempt to locate a file named my_ec2_instance_userdata.sh and inject this into the given CloudFormation file.

Example of Use:

Execute cloudinit-inject-userdata.py as follows cloudinit-inject-userdata.py --input my_CloudFormation_file.json --input my_CloudFormation_file_output.json

Optional Parameters:

parameters are available by running cloudinit-inject-userdata.py --help.

Additional Information:

• Author: Colin Johnson / [email protected]
• Date: 2014-11-11
• Version 0.1
• License Type: GNU GENERAL PUBLIC LICENSE, Version 3