Similar to https://github.com/neondatabase/neon/pull/2395, introduces a state field in Timeline, that's possible to subscribe to.
Adjusts
* walreceiver to not to have any connections if timeline is not Active
* remote storage sync to not to schedule uploads if timeline is Broken
* not to create timelines if a tenant/timeline is broken
* automatically switches timelines' states based on tenant state
Does not adjust timeline's gc, checkpointing and layer flush behaviour much, since it's not safe to cancel these processes abruptly and there's task_mgr::shutdown_tasks that does similar thing.
* etcd-client is not updated, since we plan to replace it with another client and the new version errors with some missing prost library error
* clap had released another major update that requires changing every CLI declaration again, deserves a separate PR
The 'local' part was always filled in, so that was easy to merge into
into the TimelineInfo itself. 'remote' only contained two fields,
'remote_consistent_lsn' and 'awaits_download'. I made
'remote_consistent_lsn' an optional field, and 'awaits_download' is now
false if the timeline is not present remotely.
However, I kept stub versions of the 'local' and 'remote' structs for
backwards-compatibility, with a few fields that are actively used by
the control plane. They just duplicate the fields from TimelineInfo
now. They can be removed later, once the control plane has been
updated to use the new fields.
It was only None when you queried the status of a timeline with
'timeline_detail' mgmt API call, and it was still being downloaded. You
can check for that status with the 'tenant_status' API call instead,
checking for has_in_progress_downloads field.
Anothere case was if an error happened while trying to get the current
logical size, in a 'timeline_detail' request. It might make sense to
tolerate such errors, and leave the fields we cannot fill in as empty,
None, 0 or similar, but it doesn't make sense to me to leave the whole
'local' struct empty in tht case.
Creates new `pageserver_api` and `safekeeper_api` crates to serve as the
shared dependencies. Should reduce both recompile times and cold compile
times.
Decreases the size of the optimized `neon_local` binary: 380M -> 179M.
No significant changes for anything else (mostly as expected).
