Stackility

Description: a utility for creating, updating, listing and deleting AWS CloudFormation stacks. Also, the utility can be used for determining the drift status of CloudFormation stacks.

Usage:

stackility upsert [OPTIONS]

  The main reason we have arrived here. This is the entry-point for the
  utility to create/update a CloudFormation stack.

Options:
  -v, --version TEXT         code version
  -s, --stack TEXT           stack name
  -i, --ini TEXT             INI file with needed information  [required]
  -d, --dryrun               dry run, generate a change set report
  -y, --yaml                 YAML template (deprecated - YAMLness is now
                             detected at run-time)
  --no-poll                  Start the stack work but do not poll
  -w, --work-directory TEXT  Start in the given working directory
  --help                     Show this message and exit.

See the *Properties* section below for a description of the INI file format.

stackility delete [OPTIONS]

  Delete the given CloudFormation stack.

Options:
  -s, --stack TEXT    [required]
  -r, --region TEXT
  -f, --profile TEXT
  --help              Show this message and exit.

 stackility list [OPTIONS]

  List all the CloudFormation stacks in the given region.

Options:
  -r, --region TEXT
  -f, --profile TEXT
  --help              Show this message and exit.

stackility drift [OPTIONS]

  Produce a CloudFormation drift report for the given stack.

Options:
  -s, --stack TEXT    stack name  [required]
  -r, --region TEXT   region where the stack lives
  -f, --profile TEXT  AWS profile to access resources
  --help              Show this message and exit.

Properties:

The INI file fed to the upsert command has the followning sections:

[environment]: The environment for the creation/update of a CloudFormation stack. These are the following elements of this section:

• bucket - an S3 bucket where the template can be uploaded [required]
• template - the name of the CloudFormation to be used in the operation [required]
• stack_name - the name of the stack. If this element is not present then the --stack argument must be given [optional]
• region - specify the target region for this stack [optional]
• profile - the credentials profile to be used [optional]

[tags]: - key/value pairs that will be created as tags on the stack and supported resources.

[parameters]: - key/value pairs that will be injected as parameter(s) for the stack. You can, of course, enter the values as text. However, there are two special ways to specify the value in this section:

• [ask] - this will ask for (and not echo) the values when a stack upsert is done (example below).
• [ssm:] - specify a parameter key that will be used to retrieve the value from AWS Systems Manager Parameter Store

[meta-parameters]: - (optional) if this section exists in the INI file it is assumed that the template file given in the [environment] section is a Jinja2 template file. The given template is rendered with the key/value pairs injected before the upload to the S3 bucket.

[analysis]: - (experimental) if this section exists in the INI file then CloudFormation Validator is used to perform static analysis on the given template. Items in this section:

• enforced - true | false, if true then stack create/update is aborted when errors are found else if false the analysis is only advisory.

Example parameters file:

[environment]
template=template.json
bucket=account-cf-artifacts-bucket
stack_name=example-stack
region=us-west-2

[tags]
[email protected]
PROJECT=Stackility Examples
THE_DATA=important
Name=example-stack

[parameters]
theCIDR=10.22.0.0/16
subnetCIDROne=10.22.10.0/24
bar=some value
db_password=[ask]
api_key=[ssm:api_key]

[meta-parameters]
food=pizza
drink=beer

[analysis]
enforced=false

Example invocations:

stackility upsert --ini vpc_stack.ini --region us-east-2

• use the template in vpc_stack.ini to create a VPC in the us-east-2 region.

stackility delete --stack example-stack --region us-east-2

• tear down the example-stack stack from us-east-2

stackility list --region us-east-2

• list the CloudFormation stacks in us-east-2

stackility drift --stack example-stack --region us-east-2

• Generate a CloudFormation drift report in us-east-2

Environment notes:

By default the utility polls the status of stack operation every 30 seconds. If needed CSU_POLL_INTERVAL can be set to a number of seconds to override the poll interval

---

Development notes:

Do some work on the thing:

virtualenv stkvenv
. stkenv/bin/activate
pip install --editable .

Publish the thing:

python setup.py sdist bdist_wheel
twine upload dist/*

TODO:

• print CloudFormation Outputs at the end of the upsert command
• investigate giving an IAM role, something like the profile selection