Revoking a host now unassigns its instances instead of being refused
while it has any, and removes its system metrics.
Approving and revoking no longer force a save. Hosts are saved by
autosave and on exit like everything else, which also removes the
approving state from pairing requests.
The approval code and link are logged as warnings so they show up in
the systemd service, which only prints warnings and above. The pairing
limits are now the controller.host_pairing_timeout and
controller.host_pairing_max_pending config values, 0 removes the limit.
Subscribers take an optional permitted function, used for the pairing
requests instead of overrides in a subclass.
Drops tests that restate message declarations, check that removed
commands are gone, test internal helpers or repeat the same behaviour
at another layer.
Hosts join the cluster by running the installer, which shows a code and
waits until the request is approved under Hosts > Add host in the web
interface or with clusterioctl host approve. An admin can pass their
user token to the installer to approve the host right away. The token
is only used for that and is not saved.
The controller only accepts hosts that have a record, and only
approving a host creates one. Revoking a host deletes its record, so
its token can no longer be used to reconnect. Hosts that have connected
before keep working.
Removes host generate-token, revoke-token and create-config from
clusterioctl, bootstrap generate-host-token, the host token messages and
the core.host.generate_token, revoke_token and create_config
permissions, which are also stripped from stored roles. Adds
clusterioctl host pending, approve, reject and revoke, and the
core.host.approve and core.host.revoke permissions.
Standalone installs add the host to the controller database directly,
since the controller is not running during the install.