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MXS-1220: Add old router diagnostic interface

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Added back the old diagnostic entry point to the router interface.
This commit is contained in:
Markus Mäkelä
2017-04-21 12:15:06 +03:00
committed by Markus Mäkelä
parent b1294f083c
commit fc887c7f5f
11 changed files with 769 additions and 18 deletions
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79
server/modules/routing/readwritesplit/readwritesplit.c
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@ -74,7 +74,8 @@ static MXS_ROUTER_SESSION *newSession(MXS_ROUTER *instance, MXS_SESSION *session
static void closeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *session);
static void freeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *session);
static int routeQuery(MXS_ROUTER *instance, MXS_ROUTER_SESSION *session, GWBUF *queue);
static json_t* diagnostics(const MXS_ROUTER *instance);
static void diagnostics(MXS_ROUTER *instance, DCB *dcb);
static json_t* diagnostics_json(const MXS_ROUTER *instance);
static void clientReply(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session, GWBUF *queue,
DCB *backend_dcb);
static void handleError(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session,
@ -151,6 +152,7 @@ MXS_MODULE *MXS_CREATE_MODULE()
freeSession,
routeQuery,
diagnostics,
diagnostics_json,
clientReply,
handleError,
getCapabilities,
@ -646,7 +648,80 @@ static int routeQuery(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session,
* @param instance The router instance
* @param dcb The DCB for diagnostic output
*/
static json_t* diagnostics(const MXS_ROUTER *instance)
static void diagnostics(MXS_ROUTER *instance, DCB *dcb)
{
ROUTER_INSTANCE *router = (ROUTER_INSTANCE *)instance;
char *weightby;
double master_pct = 0.0, slave_pct = 0.0, all_pct = 0.0;
dcb_printf(dcb, "\n");
dcb_printf(dcb, "\tuse_sql_variables_in: %s\n",
mxs_target_to_str(router->rwsplit_config.use_sql_variables_in));
dcb_printf(dcb, "\tslave_selection_criteria: %s\n",
select_criteria_to_str(router->rwsplit_config.slave_selection_criteria));
dcb_printf(dcb, "\tmaster_failure_mode: %s\n",
failure_mode_to_str(router->rwsplit_config.master_failure_mode));
dcb_printf(dcb, "\tmax_slave_replication_lag: %d\n",
router->rwsplit_config.max_slave_replication_lag);
dcb_printf(dcb, "\tretry_failed_reads: %s\n",
router->rwsplit_config.retry_failed_reads ? "true" : "false");
dcb_printf(dcb, "\tstrict_multi_stmt: %s\n",
router->rwsplit_config.strict_multi_stmt ? "true" : "false");
dcb_printf(dcb, "\tdisable_sescmd_history: %s\n",
router->rwsplit_config.disable_sescmd_history ? "true" : "false");
dcb_printf(dcb, "\tmax_sescmd_history: %d\n",
router->rwsplit_config.max_sescmd_history);
dcb_printf(dcb, "\tmaster_accept_reads: %s\n",
router->rwsplit_config.master_accept_reads ? "true" : "false");
dcb_printf(dcb, "\n");
if (router->stats.n_queries > 0)
{
master_pct = ((double)router->stats.n_master / (double)router->stats.n_queries) * 100.0;
slave_pct = ((double)router->stats.n_slave / (double)router->stats.n_queries) * 100.0;
all_pct = ((double)router->stats.n_all / (double)router->stats.n_queries) * 100.0;
}
dcb_printf(dcb, "\tNumber of router sessions: %" PRIu64 "\n",
router->stats.n_sessions);
dcb_printf(dcb, "\tCurrent no. of router sessions: %d\n",
router->service->stats.n_current);
dcb_printf(dcb, "\tNumber of queries forwarded: %" PRIu64 "\n",
router->stats.n_queries);
dcb_printf(dcb, "\tNumber of queries forwarded to master: %" PRIu64 " (%.2f%%)\n",
router->stats.n_master, master_pct);
dcb_printf(dcb, "\tNumber of queries forwarded to slave: %" PRIu64 " (%.2f%%)\n",
router->stats.n_slave, slave_pct);
dcb_printf(dcb, "\tNumber of queries forwarded to all: %" PRIu64 " (%.2f%%)\n",
router->stats.n_all, all_pct);
if ((weightby = serviceGetWeightingParameter(router->service)) != NULL)
{
dcb_printf(dcb, "\tConnection distribution based on %s "
"server parameter.\n",
weightby);
dcb_printf(dcb, "\t\tServer Target %% Connections "
"Operations\n");
dcb_printf(dcb, "\t\t Global Router\n");
for (SERVER_REF *ref = router->service->dbref; ref; ref = ref->next)
{
dcb_printf(dcb, "\t\t%-20s %3.1f%% %-6d %-6d %d\n",
ref->server->unique_name, (float)ref->weight / 10,
ref->server->stats.n_current, ref->connections,
ref->server->stats.n_current_ops);
}
}
}
/**
* @brief Diagnostics routine (API)
*
* Print query router statistics to the DCB passed in
*
* @param instance The router instance
* @param dcb The DCB for diagnostic output
*/
static json_t* diagnostics_json(const MXS_ROUTER *instance)
{
ROUTER_INSTANCE *router = (ROUTER_INSTANCE *)instance;