Upgrade to Helm 3

Currently we utilize helm version 2.14.2 with the tillerless plugin. Evaluate what it will take to upgrade to the latest stable version of helm with a goal of removing the tillerless plugin from our tooling since Tiller is no longer a component of helm.

Goals:

Prereq

• Upgrade to latest version of helm 2.16.5 - gitlab-com/gl-infra/k8s-workloads/common!65 (merged)
  • gitlab-com/gl-infra/k8s-workloads/plantuml!29 (merged)
  • https://gitlab.com/gitlab-com/gl-infra/k8s-workloads/logging/-/merge_requests/17
  • gitlab-com/gl-infra/k8s-workloads/gitlab-com!193 (merged)
  • https://gitlab.com/gitlab-com/gl-infra/k8s-workloads/monitoring/-/merge_requests/71
  • gitlab-com/gl-infra/k8s-workloads/gitlab-helmfiles!7 (merged)

Prep

• Create a CI image with all the necessary tooling, a script, and CI config, that will upgrade all helm 2 configurations - gitlab-com/gl-infra/k8s-workloads/common!68 (merged)
  • Create Docker image and push to ops
  • Create CI configuration using this docker image - gitlab-com/gl-infra/k8s-workloads/common!70 (closed)
• Create a CI image that is to be utilized after the helm version 2 upgrade is complete - gitlab-com/gl-infra/k8s-workloads/common!69 (closed)
• Create the necessary MR's to utilize the new helm version for each project
  • gitlab-helmfiles -
  • logging - https://gitlab.com/gitlab-com/gl-infra/k8s-workloads/logging/-/merge_requests/18
  • plantuml - gitlab-com/gl-infra/k8s-workloads/plantuml!30
  • monitoring - https://gitlab.com/gitlab-com/gl-infra/k8s-workloads/monitoring/-/merge_requests/73
  • gitlab-com - gitlab-com/gl-infra/k8s-workloads/gitlab-com!200 (closed)
• Create Change Request - production#1953 (closed)

Execute

• Execute upgrade of helm through CI
• Merge each projects' MR and test as necessary
• Execute another CI job that will clean up version 2
• Remove tech debt from old tooling
  • Calling out changes made here: gitlab-com/gl-infra/k8s-workloads/gitlab-com!144 (merged) as an example