Expose Server Statefulset updateStrategy configuration

[MeijerM1]

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Is your feature request related to a problem? Please describe.

The Helm chart allows the configuration of the Consul Client updateStrategy. However the Server does not expose this configuration. The official Consul K8s upgrade guide recommends updating the server pods one by one by decreasing the updatePartition amount. This process van be simplified by using the OnDelete strategy which reduces the need for multiple updates to the Helm chart.

Feature Description

Allow the server pod updateStrategy to be configured via the Helm chart.

Use Case(s)

Reduce the required effort when upgrading Consul.

Contributions

[t-eckert]

Hi @MeijerM1,

Thank you for opening this issue. I think this makes a lot of sense and would be a great enhancement. I will share this with our PMs, @nrichu-hcp and @david-yu.

[david-yu]

Hi @MeijerM1 This does seem like a valid improvement and we are open to PRs to improve this workflow. At a high level we would like to improve our overall upgrade workflow and provide some sort of automation to improve there overall UX for upgrades on Consul K8s sometime later this year.

[david-yu]

No longer needed as we no longer need to utilize updatePartition due to this change: https://github.com/hashicorp/consul-k8s/pull/3000