hcq/MaxScale
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Make MySQL monitor crash-safe

Browse Source 
The MySQL monitor stores the server states in a backup file which can be
used to restore the state of the servers even if MaxScale is stoppen in an
uncontrolled fashion.
This commit is contained in:
Markus Mäkelä
2017-03-16 10:58:50 +02:00
parent 7165b4306f
commit 08cc7a9515
4 changed files with 453 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
server/modules/monitor/mysqlmon/mysql_mon.c
View File

@ -269,6 +269,7 @@ startMonitor(MXS_MONITOR *monitor, const MXS_CONFIG_PARAMETER* params)
handle->shutdown = 0;
handle->id = config_get_global_options()->id;
handle->warn_failover = true;
handle->load_backup = true;
spinlock_init(&handle->lock);
}
@ -326,6 +327,9 @@ stopMonitor(MXS_MONITOR *mon)
handle->shutdown = 1;
thread_wait(handle->thread);
/** Controlled shutdown, remove stored backup */
remove_server_backup(mon);
}
/**
@ -1098,6 +1102,12 @@ monitorMain(void *arg)
lock_monitor_servers(mon);
servers_status_pending_to_current(mon);
if (handle->load_backup)
{
handle->load_backup = false;
load_server_backup(mon);
}
/* start from the first server in the list */
ptr = mon->databases;
@ -1375,6 +1385,7 @@ monitorMain(void *arg)
mon_hangup_failed_servers(mon);
servers_status_current_to_pending(mon);
store_server_backup(mon);
release_monitor_servers(mon);
} /*< while (1) */
}