OpenEBS Helm Operator

Introduction

• This is a helm operator for openebs
• The content of values.yaml will be placed as spec items in OpenEBSInstallTemplate CR
• The operator watches all namespaces. There is no need for helm client/tiller to be installed. (the helm operator imports code from helm project)
• Changes to spec of the CR will behave similar to values override via helm
• All OpenEBS resources have ownerReference of OpenEBSInstallTemplate & are deleted upon removal of CR

Example of OpenEBSInstallTemplate CR can be found here

Limitations

• Release names are auto-generated based on CR UID. Impact is character-length will exceed limit if CR name is longer.

  • Workaround: Give shorter nams:
  • ER: operator-framework/operator-sdk#1094

• Release namespace doesn't have a field in the spec. (need more exploration)

  • Workaround: Create ns "openebs" or any desired before applying the CR

• Uninstall of a failed helm release (say, wrong spec) will be stuck.

  • Workaround: finalizer has to be removed manually
  • Snippet:

    status:
    conditions:
    - lastTransitionTime: "2019-06-28T02:12:46Z"
      status: "True"
      type: Initialized
    - lastTransitionTime: "2019-06-28T02:12:46Z"
      message: 'failed to get release history: release: "example-openebsinstalltemplate-3c4h3yqweylajqktnjs04e135"
        not found'
      reason: UninstallError
      status: "True"
      type: ReleaseFailed
  

• Image Maping

  helm-operator image	openebs release image
  v0.0.1	1.0.0
  v0.0.2	1.1.0
  v0.0.3	1.3.0
  v0.0.4	1.4.0
  v0.0.5	1.5.0
  v0.0.6	2.10.0
  v0.0.7	2.11.0
  v0.0.8	2.12.2
  v0.0.9	3.0.0