KubesealR

KubesealR is a pure-Ruby implementation of the CLI client kubeseal component of Bitnami's Kubernetes sealed-secrets system.

KubesealR also embeds a transformer plugin for KustomizeR, a pure-Ruby Kustomize implementation. This plugin allows KustomizeR to seal [generated or provided] secrets, as a resource-config transformation pass.

Add this line to your application's Gemfile:

gem 'kubesealr'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install kubesealr

(TODO; will mostly match CLI usage of kubeseal)

KubesealR provides one Kustomize transformer plugin, SealSecretsTransform, with the following K8s document-type:

apiVersion: kubesealr.covalenthq.com/v1
kind: SealSecretsTransform

Possible fields on this configuration:

.spec.match: "all" | [String] | {pattern: RegexpString}

.spec.match controls which secrets will be sealed.

• The literal string all will match all secrets.
• A list of strings means "match secrets with these names exactly."
• Setting .spec.match.pattern to a string will treat that string as a regular expression and use it to match secret names.

Defaults to all.

.spec.keepUnsealed: true | false

.spec.keepUnsealed controls whether the original, unsealed versions of the secrets will be emitted by the transform alongside the sealed versions. Defaults to false. You may want to set this to true if you have further transformation passes that depend on the unsealed secrets in some way.

Add a new resource path to the transformers resource-list in your kustomization.yaml. For example:

In kustomization.yaml:

---
transformers:
  - seal-secrets.yaml

In seal-secrets.yaml:

---
apiVersion: kubesealr.covalenthq.com/v1
kind: SealSecretsTransform
spec:
  match:
    pattern: "-conn$"
  keepUnsealed: false

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 the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/tsutsu/kubesealr.

The gem is available as open source under the terms of the MIT License.