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External master server support for failover/switchover

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If the master is replicating from an external master, the monitor will save the
host:port of the external server. During demotion, the old master stops the external
replication while the new master begins it. Also, any commands that would add
to gtid have to be omitted when an external master is in play.
This commit is contained in:
Esa Korhonen
2018-02-06 14:06:41 +02:00
parent 5a33a5a013
commit a0d9c7da74
2 changed files with 199 additions and 69 deletions
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2
server/modules/monitor/mysqlmon.h
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@ -71,6 +71,8 @@ typedef struct
bool verify_master_failure; /**< Whether master failure is verified via slaves */
int master_failure_timeout; /**< Time in seconds to wait before doing failover */
int64_t master_gtid_domain; /**< Gtid domain currently used by the master */
char external_master_host[MAX_SERVER_ADDRESS_LEN]; /**< External master host, for fail/switchover */
int external_master_port; /**< External master port */
bool auto_rejoin; /**< Attempt to start slave replication on standalone servers or servers
replicating from the wrong master. */
int n_excluded; /**< Number of excluded servers */