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22942c0a85
The following steps are performed in sequence as part of the Raft-based recovery procedure: - set `recovery_leader` to the host ID of the recovery leader in `scylla.yaml` on all live nodes, - send the `SIGHUP` signal to all Scylla processes to reload the config, - perform a rolling restart (with the recovery leader being restarted first). These steps are not intuitive and more complicated than they could be. In this PR, we simplify these steps. From now on, we will be able to simply set `recovery_leader` on each node just before restarting it. Apart from making necessary changes in the code, we also update all tests of the Raft-based recovery procedure and the user-facing documentation. Fixes scylladb/scylladb#25015 The Raft-based procedure was added in 2025.2. This PR makes the procedure simpler and less error-prone, so it should be backported to 2025.2 and 2025.3. - (cherry picked from commitec69028907) - (cherry picked from commit445a15ff45) - (cherry picked from commit23f59483b6) - (cherry picked from commitba5b5c7d2f) - (cherry picked from commit9e45e1159b) - (cherry picked from commitf408d1fa4f) Parent PR: #25032 Closes scylladb/scylladb#25334 * github.com:scylladb/scylladb: docs: document the option to set recovery_leader later test: delay setting recovery_leader in the recovery procedure tests gossip: add recovery_leader to gossip_digest_syn db: system_keyspace: peers_table_read_fixup: remove rows with null host_id db/config, gms/gossiper: change recovery_leader to UUID db/config, utils: allow using UUID as a config option