Question

Puppet Kubernetes How do I use kubetool and what is it s significance in using kubernetes with puppet

Answer 1

The module puppetlabs/kubernetes has Kubetool, which is a configuration tool that auto-generates the Hiera security parameters, the discovery token hash, and other configurations for your Kubernetes cluster. 

To simplify installation and use, the tool is available as a Docker image.

Kubetool plays an important role in generating the module configuration.

Kubetool creates:

• A yaml file that corresponds to the operating system specified by the OS parameter. To view the file contents, run cat Debian.yaml for a Debian system, or run cat RedHat.yaml for RedHat. The yaml files produced for each member of the etcd cluster contain certificate information to bootstrap an initial etcd cluster. Ensure these are also placed in your hieradata directory at the node level.

• A discovery token hash and encoded values required by Kubernetes. To regenerate the values, including certificates and tokens, run the kubetool command.