document upgrade/downgrade

[worldsoup]

inspired by: https://discord.com/channels/981533931486724126/1108708939744424048/1108711816684650497

CC @Pothulapati

[romange]

@Pothulapati do we need to document this?

[Pothulapati]

TBH, Even if the underlying image is docker, The actual abstraction matters more. In k8s, The upgrade/downgrade procedure is an update on the resource and we use the underlying snapshot or replication feature to make sure there is no data loss. (Documentation for snapshotting is incoming)

We can have a page on how to update your isntances but it essentially mentions that as same as other k8s resources, and to make sure there is no data loss to have snapshotting or replication set before. wdyt?

[romange]

I think we should document processes that are unique to dragonfly. I do not think we need a dedicated page for upgrade procedure for k8s, maybe have a paragraph in the documentation about snapshotting to show how dragonfly version can be changed using the usual k8s command.