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04b8f72946
repair: Implement auto repair for tablet repair This patch implements the basic auto repair support for tablet repair. It was decided to add no per table configuration for the initial implementation, so two scylla yaml config options are introduced to set the default auto repair configs for all the tablet tables. - auto_repair_enabled_default Set true to enable auto repair for tablet tables by default. The value will be overridden by the per keyspace or per table configuration which is not implemented yet. - auto_repair_threshold_default_in_seconds Set the default time in seconds for the auto repair threshold for tablet tables. If the time since last repair is bigger than the configured time, the tablet is eligible for auto repair. The value will be overridden by the per keyspace or per table configuration which is not implemented yet. The following metrcis are added: - auto_repair_needs_repair_nr The number of tablets with auto repair enabled that needs repair - auto_repair_enabled_nr The number of tablets with auto repair enabled The metrics are useful to tell if auto repair is falling behind. In the future, more auto repair scheduling will be added, e.g., scheduling based on the repaired and unrepaired sstable set size, tombstone ratio and so on, in addition to the time based scheduling. Fixes SCYLLADB-99 New feature. No backport. Closes scylladb/scylladb#27534 * github.com:scylladb/scylladb: topology_coordinator: Add metrics for tablet repair repair: Implement auto repair for tablet repair