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MXS-1509: Add ignore_external_masters parameter

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The new parameter allows ignoring of master servers that are external to
the monitor configuration. This allows sub-trees of the actual replication
tree to be used as fully fledged replication trees.
This commit is contained in:
Markus Mäkelä
2017-11-20 11:16:52 +02:00
parent 7c2a173a17
commit d5d41349ae
4 changed files with 37 additions and 0 deletions
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15
server/modules/monitor/mysqlmon/mysql_mon.c
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@ -129,6 +129,7 @@ MXS_MODULE* MXS_CREATE_MODULE()
{"detect_standalone_master", MXS_MODULE_PARAM_BOOL, "false"},
{"failcount", MXS_MODULE_PARAM_COUNT, "5"},
{"allow_cluster_recovery", MXS_MODULE_PARAM_BOOL, "true"},
{"ignore_external_masters", MXS_MODULE_PARAM_BOOL, "false"},
{
"script",
MXS_MODULE_PARAM_PATH,
@ -280,6 +281,7 @@ startMonitor(MXS_MONITOR *monitor, const MXS_CONFIG_PARAMETER* params)
handle->detectStaleSlave = config_get_bool(params, "detect_stale_slave");
handle->replicationHeartbeat = config_get_bool(params, "detect_replication_lag");
handle->multimaster = config_get_bool(params, "multimaster");
handle->ignore_external_masters = config_get_bool(params, "ignore_external_masters");
handle->detect_standalone_master = config_get_bool(params, "detect_standalone_master");
handle->failcount = config_get_integer(params, "failcount");
handle->allow_cluster_recovery = config_get_bool(params, "allow_cluster_recovery");
@ -1338,6 +1340,19 @@ monitorMain(void *arg)
}
}
/**
* Clear external slave status from master if configured to do so.
* This allows parts of a multi-tiered replication setup to be used
* in MaxScale.
*/
if (root_master && SERVER_IS_SLAVE_OF_EXTERNAL_MASTER(root_master->server) &&
SERVER_IS_MASTER(root_master->server) && handle->ignore_external_masters)
{
monitor_clear_pending_status(root_master,
SERVER_SLAVE | SERVER_SLAVE_OF_EXTERNAL_MASTER);
server_clear_status_nolock(root_master->server, SERVER_SLAVE | SERVER_SLAVE_OF_EXTERNAL_MASTER);
}
/**
* After updating the status of all servers, check if monitor events
* need to be launched.