cbb8c68770
Relaced router_options with configuration parameters in the createInstance router entry point. The same needs to be done for the filter API as barely any filters use the feature. Some routers (binlogrouter) still support router_options but using it is deprecated. This had to be done as their use wasn't deprecated in 2.2.
311 lines
9.4 KiB
C++
311 lines
9.4 KiB
C++
/*
|
|
* Copyright (c) 2016 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2022-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
|
|
#include "schemarouter.hh"
|
|
#include "schemarouterinstance.hh"
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
|
|
#include <maxscale/alloc.h>
|
|
#include <maxscale/buffer.h>
|
|
#include <maxscale/log_manager.h>
|
|
#include <maxscale/modinfo.h>
|
|
#include <maxscale/modutil.h>
|
|
#include <maxscale/poll.h>
|
|
#include <maxscale/query_classifier.h>
|
|
#include <maxscale/router.h>
|
|
#include <maxscale/secrets.h>
|
|
#include <maxscale/spinlock.h>
|
|
|
|
using std::string;
|
|
|
|
namespace schemarouter
|
|
{
|
|
|
|
#define DEFAULT_REFRESH_INTERVAL "300"
|
|
|
|
/**
|
|
* @file schemarouter.c The entry points for the simple sharding router module.
|
|
*/
|
|
|
|
SchemaRouter::SchemaRouter(SERVICE *service, SConfig config):
|
|
mxs::Router<SchemaRouter, SchemaRouterSession>(service),
|
|
m_config(config),
|
|
m_service(service)
|
|
{
|
|
spinlock_init(&m_lock);
|
|
}
|
|
|
|
SchemaRouter::~SchemaRouter()
|
|
{
|
|
}
|
|
|
|
SchemaRouter* SchemaRouter::create(SERVICE* pService, MXS_CONFIG_PARAMETER* params)
|
|
{
|
|
if ((config_get_param(params, "auth_all_servers")) == NULL)
|
|
{
|
|
MXS_NOTICE("Authentication data is fetched from all servers. To disable this "
|
|
"add 'auth_all_servers=0' to the service.");
|
|
pService->users_from_all = true;
|
|
}
|
|
|
|
SConfig config(new Config(params));
|
|
return new SchemaRouter(pService, config);
|
|
}
|
|
|
|
bool SchemaRouter::configure(MXS_CONFIG_PARAMETER* params)
|
|
{
|
|
SConfig config(new Config(params));
|
|
m_config = config;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @node Search all RUNNING backend servers and connect
|
|
*
|
|
* Parameters:
|
|
* @param backend_ref - in, use, out
|
|
* Pointer to backend server reference object array.
|
|
* NULL is not allowed.
|
|
*
|
|
* @param router_nservers - in, use
|
|
* Number of backend server pointers pointed to by b.
|
|
*
|
|
* @param session - in, use
|
|
* MaxScale session pointer used when connection to backend is established.
|
|
*
|
|
* @param router - in, use
|
|
* Pointer to router instance. Used when server states are qualified.
|
|
*
|
|
* @return true, if at least one master and one slave was found.
|
|
*
|
|
*
|
|
* @details It is assumed that there is only one available server.
|
|
* There will be exactly as many backend references than there are
|
|
* connections because all servers are supposed to be operational. It is,
|
|
* however, possible that there are less available servers than expected.
|
|
*/
|
|
bool connect_backend_servers(SSRBackendList& backends, MXS_SESSION* session)
|
|
{
|
|
bool succp = false;
|
|
int servers_found = 0;
|
|
int servers_connected = 0;
|
|
int slaves_connected = 0;
|
|
|
|
if (MXS_LOG_PRIORITY_IS_ENABLED(LOG_INFO))
|
|
{
|
|
MXS_INFO("Servers and connection counts:");
|
|
|
|
for (SSRBackendList::iterator it = backends.begin(); it != backends.end(); it++)
|
|
{
|
|
SERVER_REF* b = (*it)->backend();
|
|
|
|
MXS_INFO("MaxScale connections : %d (%d) in \t%s:%d %s",
|
|
b->connections,
|
|
b->server->stats.n_current,
|
|
b->server->address,
|
|
b->server->port,
|
|
STRSRVSTATUS(b->server));
|
|
}
|
|
}
|
|
/**
|
|
* Scan server list and connect each of them. None should fail or session
|
|
* can't be established.
|
|
*/
|
|
for (SSRBackendList::iterator it = backends.begin(); it != backends.end(); it++)
|
|
{
|
|
SERVER_REF* b = (*it)->backend();
|
|
|
|
if (SERVER_IS_RUNNING(b->server))
|
|
{
|
|
servers_found += 1;
|
|
|
|
/** Server is already connected */
|
|
if ((*it)->in_use())
|
|
{
|
|
slaves_connected += 1;
|
|
}
|
|
/** New server connection */
|
|
else
|
|
{
|
|
if ((*it)->connect(session))
|
|
{
|
|
servers_connected += 1;
|
|
}
|
|
else
|
|
{
|
|
succp = false;
|
|
MXS_ERROR("Unable to establish "
|
|
"connection with slave %s:%d",
|
|
b->server->address,
|
|
b->server->port);
|
|
/* handle connect error */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (servers_connected > 0)
|
|
{
|
|
succp = true;
|
|
|
|
if (MXS_LOG_PRIORITY_IS_ENABLED(LOG_INFO))
|
|
{
|
|
for (SSRBackendList::iterator it = backends.begin(); it != backends.end(); it++)
|
|
{
|
|
SERVER_REF* b = (*it)->backend();
|
|
|
|
if ((*it)->in_use())
|
|
{
|
|
MXS_INFO("Connected %s in \t%s:%d",
|
|
STRSRVSTATUS(b->server),
|
|
b->server->address,
|
|
b->server->port);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return succp;
|
|
}
|
|
|
|
SchemaRouterSession* SchemaRouter::newSession(MXS_SESSION* pSession)
|
|
{
|
|
SSRBackendList backends;
|
|
|
|
for (SERVER_REF *ref = m_service->dbref; ref; ref = ref->next)
|
|
{
|
|
if (ref->active)
|
|
{
|
|
backends.push_back(SSRBackend(new SRBackend(ref)));
|
|
}
|
|
}
|
|
|
|
SchemaRouterSession* rval = NULL;
|
|
|
|
if (connect_backend_servers(backends, pSession))
|
|
{
|
|
rval = new SchemaRouterSession(pSession, this, backends);
|
|
}
|
|
|
|
return rval;
|
|
}
|
|
|
|
void SchemaRouter::diagnostics(DCB* dcb)
|
|
{
|
|
double sescmd_pct = m_stats.n_sescmd != 0 ?
|
|
100.0 * ((double)m_stats.n_sescmd / (double)m_stats.n_queries) :
|
|
0.0;
|
|
|
|
/** Session command statistics */
|
|
dcb_printf(dcb, "\n\33[1;4mSession Commands\33[0m\n");
|
|
dcb_printf(dcb, "Total number of queries: %d\n",
|
|
m_stats.n_queries);
|
|
dcb_printf(dcb, "Percentage of session commands: %.2f\n",
|
|
sescmd_pct);
|
|
dcb_printf(dcb, "Longest chain of stored session commands: %d\n",
|
|
m_stats.longest_sescmd);
|
|
dcb_printf(dcb, "Session command history limit exceeded: %d times\n",
|
|
m_stats.n_hist_exceeded);
|
|
|
|
/** Session time statistics */
|
|
|
|
if (m_stats.sessions > 0)
|
|
{
|
|
dcb_printf(dcb, "\n\33[1;4mSession Time Statistics\33[0m\n");
|
|
dcb_printf(dcb, "Longest session: %.2lf seconds\n", m_stats.ses_longest);
|
|
dcb_printf(dcb, "Shortest session: %.2lf seconds\n", m_stats.ses_shortest);
|
|
dcb_printf(dcb, "Average session length: %.2lf seconds\n", m_stats.ses_average);
|
|
}
|
|
dcb_printf(dcb, "Shard map cache hits: %d\n", m_stats.shmap_cache_hit);
|
|
dcb_printf(dcb, "Shard map cache misses: %d\n", m_stats.shmap_cache_miss);
|
|
dcb_printf(dcb, "\n");
|
|
}
|
|
|
|
json_t* SchemaRouter::diagnostics_json() const
|
|
{
|
|
double sescmd_pct = m_stats.n_sescmd != 0 ?
|
|
100.0 * ((double)m_stats.n_sescmd / (double)m_stats.n_queries) :
|
|
0.0;
|
|
|
|
json_t* rval = json_object();
|
|
json_object_set_new(rval, "queries", json_integer(m_stats.n_queries));
|
|
json_object_set_new(rval, "sescmd_percentage", json_real(sescmd_pct));
|
|
json_object_set_new(rval, "longest_sescmd_chain", json_integer(m_stats.longest_sescmd));
|
|
json_object_set_new(rval, "times_sescmd_limit_exceeded", json_integer(m_stats.n_hist_exceeded));
|
|
|
|
/** Session time statistics */
|
|
if (m_stats.sessions > 0)
|
|
{
|
|
json_object_set_new(rval, "longest_session", json_real(m_stats.ses_longest));
|
|
json_object_set_new(rval, "shortest_session", json_real(m_stats.ses_shortest));
|
|
json_object_set_new(rval, "average_session", json_real(m_stats.ses_average));
|
|
}
|
|
|
|
json_object_set_new(rval, "shard_map_hits", json_integer(m_stats.shmap_cache_hit));
|
|
json_object_set_new(rval, "shard_map_misses", json_integer(m_stats.shmap_cache_miss));
|
|
|
|
return rval;
|
|
}
|
|
|
|
uint64_t SchemaRouter::getCapabilities()
|
|
{
|
|
return RCAP_TYPE_CONTIGUOUS_INPUT | RCAP_TYPE_RUNTIME_CONFIG;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* The module entry point routine. It is this routine that
|
|
* must populate the structure that is referred to as the
|
|
* "module object", this is a structure with the set of
|
|
* external entry points for this module.
|
|
*
|
|
* @return The module object
|
|
*/
|
|
extern "C" MXS_MODULE* MXS_CREATE_MODULE()
|
|
{
|
|
static MXS_MODULE info =
|
|
{
|
|
MXS_MODULE_API_ROUTER,
|
|
MXS_MODULE_BETA_RELEASE,
|
|
MXS_ROUTER_VERSION,
|
|
"A database sharding router for simple sharding",
|
|
"V1.0.0",
|
|
RCAP_TYPE_CONTIGUOUS_INPUT | RCAP_TYPE_RUNTIME_CONFIG,
|
|
&schemarouter::SchemaRouter::s_object,
|
|
NULL, /* Process init. */
|
|
NULL, /* Process finish. */
|
|
NULL, /* Thread init. */
|
|
NULL, /* Thread finish. */
|
|
{
|
|
{"ignore_databases", MXS_MODULE_PARAM_STRING},
|
|
{"ignore_databases_regex", MXS_MODULE_PARAM_STRING},
|
|
{"max_sescmd_history", MXS_MODULE_PARAM_COUNT, "0"},
|
|
{"disable_sescmd_history", MXS_MODULE_PARAM_BOOL, "false"},
|
|
{"refresh_databases", MXS_MODULE_PARAM_BOOL, "true"},
|
|
{"refresh_interval", MXS_MODULE_PARAM_COUNT, DEFAULT_REFRESH_INTERVAL},
|
|
{"debug", MXS_MODULE_PARAM_BOOL, "false"},
|
|
{"preferred_server", MXS_MODULE_PARAM_SERVER},
|
|
{MXS_END_MODULE_PARAMS}
|
|
}
|
|
};
|
|
|
|
return &info;
|
|
}
|