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MXS-1490 Prepare for failover functionality addition

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Moved mon_process_failover() from monitor.cc to mysql_mon.cc. Renamed
some functions and variables related to previous failover functionality
to avoid confusion.
This commit is contained in:
Esa Korhonen
2017-10-25 10:14:04 +03:00
parent 554ae642d7
commit 63c7550196
4 changed files with 117 additions and 117 deletions
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73
server/core/monitor.cc
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@ -1775,79 +1775,6 @@ void mon_process_state_changes(MXS_MONITOR *monitor, const char *script, uint64_
}
}
bool mon_process_failover(MXS_MONITOR *monitor, const char* failover_script, uint32_t failover_timeout)
{
bool rval = true;
MXS_CONFIG* cnf = config_get_global_options();
MXS_MONITORED_SERVER* failed_master = NULL;
for (MXS_MONITORED_SERVER *ptr = monitor->monitored_servers; ptr; ptr = ptr->next)
{
if (mon_status_changed(ptr))
{
if (ptr->server->last_event == MASTER_DOWN_EVENT)
{
if (!cnf->passive)
{
if (failed_master)
{
MXS_ALERT("Multiple failed master servers detected: "
"'%s' is the first master to fail but server "
"'%s' has also triggered a master_down event.",
failed_master->server->unique_name,
ptr->server->unique_name);
return false;
}
else
{
failed_master = ptr;
}
}
}
}
else
{
/**
* If a master_down event was triggered when this MaxScale was
* passive, we need to execute the failover script again if no new
* masters have appeared and this MaxScale has been set as active
* since the event took place.
*/
if (!cnf->passive && // This is not a passive MaxScale
ptr->server->last_event == MASTER_DOWN_EVENT && // This is a master that went down
cnf->promoted_at >= ptr->server->triggered_at && // Promoted to active after the event took place
ptr->new_event && // Event has not yet been processed
monitor->last_master_down > monitor->last_master_up) // Latest relevant event
{
int64_t timeout = SEC_TO_HB(failover_timeout);
int64_t t = hkheartbeat - ptr->server->triggered_at;
if (t > timeout)
{
MXS_WARNING("Failover of server '%s' did not take place within "
"%u seconds, failover needs to be re-triggered",
ptr->server->unique_name, failover_timeout);
failed_master = ptr;
ptr->new_event = false;
}
}
}
}
if (failed_master)
{
MXS_NOTICE("Performing failover of server '%s'", failed_master->server->unique_name);
if (monitor_launch_script(monitor, failed_master, failover_script, failover_timeout))
{
rval = false;
}
}
return rval;
}
static const char* monitor_state_to_string(int state)
{
switch (state)