s3_master - Manage policies on existing S3 buckets

Inspired by stack_master, s3_master aims to manage various policies on S3 buckets created outside of cloudformation. If your buckets were created via cloudformation, then you should use cfn to manage the policies.

s3_master provides a simple diff/push workflow so policy documents can be stored in git and reconciled against AWS easily.

Add this line to your application's Gemfile:

gem 's3_master'

And then execute:

$ bundle

Or install it yourself as:

$ gem install s3_master

N.B. this is an alpha release!

• Make a policies directory to hold your json policy documents.
• Make a s3_policies.yml file like:

buckets:
  bucket-a:
    region: us-east-1
    lifecycle: bucket-a/lifecycle.json
    replication: bucket-a/replication.json
    inventory:
      all: bucket-a/inventory-all.json
  bucket-b:
    lifecycle: bucket-b/lifecycle.json
    replication: bucket-b/replication.json

• Policies can be imported from S3 via the fetch subcommand. Policies will be written to the file specified in the s3_policies.yml, e.g. for the above, running:

s3_master fetch bucket-a lifecycle

It would write out the current policy to policies/bucket-a/lifecycle.json

• Policy changes are loaded to S3 via apply, e.g:

s3_master apply bucket-a lifecycle

A diff is shown and confirmation is requested by default.

• Need some tests with aruba
• Better warnings / error messages when the bucket requires a regional endpoint, and when an invalid policy-type is specified.
• Make an init subcommand

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/bustle/s3_master. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License. BDG Media sponsored this work. Come work with us!

Everyone interacting in the S3Master project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.