Make Anthos version upgradeable

equinix / terraform-equinix-metal-anthos-on-baremetal

Terraform module for quick deployment of baremetal Anthos on Equinix Metal

https://registry.terraform.io/modules/equinix/anthos-on-baremetal

Apache License 2.0

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Make Anthos version upgradeable #65

Open displague opened 3 years ago

displague commented 3 years ago

By running terraform apply with an updated Anthos version, a user may expect this module to upgrade the installed Anthos version.

That is not the case today.

Doing so should upgrade the installed cluster.

terraform apply -var anthos_version=1.6.0 # cluster has been installed
terraform apply -var anthos_version=1.7.0 # cluster has been upgraded

displague commented 3 years ago

https://cloud.google.com/anthos/clusters/docs/bare-metal/1.6/how-to/upgrade

Seems the steps may be:

ssh to the control plane nodes
update the bmctl binary
run bmctl upgrade cluster on the first control plane node (with the precise version)
do something about the first user cluster?

We'll likely need to run the upgrade command in a separate null-resource provisioner block on every install, and handle the case where the command returns any kind of "already running that version" response.

displague commented 3 years ago

Upgrading may a require HA configuration.