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Overhaul monitor_common functions and move into monitor.c

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This commit is contained in:
counterpoint
2015-11-19 15:40:43 +00:00
parent da74bb7c3f
commit e7a30a7944
9 changed files with 444 additions and 649 deletions
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353
server/core/monitor.c
View File

@ -41,6 +41,7 @@
#include <skygw_utils.h>
#include <log_manager.h>
#include <secrets.h>
#include <maxscale_pcre2.h>
#include <mysql/mysqld_error.h>
static MONITOR *allMonitors = NULL;
@ -549,3 +550,355 @@ void monitorAddParameters(MONITOR *monitor, CONFIG_PARAMETER *params)
params = params->next;
}
}
/**
* Set a pending status bit in the monitor server
*
* @param server The server to update
* @param bit The bit to clear for the server
*/
void
monitor_set_pending_status(MONITOR_SERVERS *ptr, int bit)
{
ptr->pending_status |= bit;
}
/**
* Clear a pending status bit in the monitor server
*
* @param server The server to update
* @param bit The bit to clear for the server
*/
void
monitor_clear_pending_status(MONITOR_SERVERS *ptr, int bit)
{
ptr->pending_status &= ~bit;
}
/*
* Determine a monitor event, defined by the difference between the old
* status of a server and the new status.
*
* @param node The monitor server data for a particular server
* @result monitor_event_t A monitor event (enum)
*/
monitor_event_t
mon_get_event_type(MONITOR_SERVERS* node)
{
typedef enum {
DOWN_EVENT,
UP_EVENT,
LOSS_EVENT,
NEW_EVENT
} general_event_type;
general_event_type event_type;
unsigned int prev = node->mon_prev_status
& (SERVER_RUNNING|SERVER_MASTER|SERVER_SLAVE|SERVER_JOINED|SERVER_NDB);
unsigned int present = node->server->status
& (SERVER_RUNNING|SERVER_MASTER|SERVER_SLAVE|SERVER_JOINED|SERVER_NDB);
if (prev == present)
{
/* No change in the bits we're interested in */
return UNDEFINED_MONITOR_EVENT;
}
if ((prev & SERVER_RUNNING) == 0)
{
/* The server was not running previously */
if ((present & SERVER_RUNNING) != 0)
{
event_type = UP_EVENT;
}
}
else
{
/* Previous state must have been running */
if ((present & SERVER_RUNNING) == 0)
{
event_type = DOWN_EVENT;
}
else
{
/* Was running and still is */
if (prev && (SERVER_MASTER|SERVER_SLAVE|SERVER_JOINED|SERVER_NDB))
{
/* We used to know what kind of server it was */
event_type = LOSS_EVENT;
}
else
{
/* We didn't know what kind of server it was, now we do*/
event_type = NEW_EVENT;
}
}
}
switch (event_type)
{
case UP_EVENT:
return (present & SERVER_MASTER) ? MASTER_UP_EVENT :
(present & SERVER_SLAVE) ? SLAVE_UP_EVENT :
(present & SERVER_JOINED) ? SYNCED_UP_EVENT :
(present & SERVER_NDB) ? NDB_UP_EVENT :
SERVER_UP_EVENT;
case DOWN_EVENT:
return (present & SERVER_MASTER) ? MASTER_DOWN_EVENT :
(present & SERVER_SLAVE) ? SLAVE_DOWN_EVENT :
(present & SERVER_JOINED) ? SYNCED_DOWN_EVENT :
(present & SERVER_NDB) ? NDB_DOWN_EVENT :
SERVER_DOWN_EVENT;
case LOSS_EVENT:
return (prev & SERVER_MASTER) ? LOST_MASTER_EVENT :
(prev & SERVER_SLAVE) ? LOST_SLAVE_EVENT :
(prev & SERVER_JOINED) ? LOST_SYNCED_EVENT :
LOST_NDB_EVENT;
case NEW_EVENT:
return (present & SERVER_MASTER) ? NEW_MASTER_EVENT :
(present & SERVER_SLAVE) ? NEW_SLAVE_EVENT :
(present & SERVER_JOINED) ? NEW_SYNCED_EVENT :
NEW_NDB_EVENT;
default:
/* This should be impossible */
return UNDEFINED_MONITOR_EVENT;
}
}
/*
* Given a monitor event (enum) provide a text string equivalent
* @param node The monitor server data whose event is wanted
* @result string The name of the monitor event for the server
*/
char*
mon_get_event_name(MONITOR_SERVERS* node)
{
return monitor_event_definitions[mon_get_event_type(node)].name;
}
/*
* Given the text version of a monitor event, determine the event (enum)
*
* @param event_name String containing the event name
* @result monitor_event_t Monitor event corresponding to name
*/
monitor_event_t
mon_name_to_event (char *event_name)
{
monitor_event_t event;
for (event = 0; event < MAX_MONITOR_EVENT; event++)
{
if (0 == strcasecmp(monitor_event_definitions[event].name, event_name))
{
return event;
}
}
return UNDEFINED_MONITOR_EVENT;
}
/**
* Create a list of running servers
*
* @param servers Monitored servers
* @param dest Destination where the string is appended, must be null terminated
* @param len Length of @c dest
*/
void
mon_append_node_names(MONITOR_SERVERS* servers, char* dest, int len)
{
char *separator = "";
char arr[MAX_SERVER_NAME_LEN + 32]; // Some extra space for port
while (servers && strlen(dest) < (len - strlen(separator)))
{
if (SERVER_IS_RUNNING(servers->server))
{
strcat(dest, separator, len);
separator = ",";
snprintf(arr, sizeof(arr), "%s:%d", servers->server->name, servers->server->port);
strncat(dest, arr, len - strlen(dest) - 1);
}
servers = servers->next;
}
}
/**
* Check if current monitored server status has changed
*
* @param mon_srv The monitored server
* @return true if status has changed or false
*/
bool
mon_status_changed(MONITOR_SERVERS* mon_srv)
{
/* Previous status is -1 if not yet set */
return (mon_srv->mon_prev_status != -1
&& mon_srv->mon_prev_status != mon_srv->server->status);
}
/**
* Check if current monitored server has a loggable failure status
*
* @param mon_srv The monitored server
* @return true if failed status can be logged or false
*/
bool
mon_print_fail_status(MONITOR_SERVERS* mon_srv)
{
return (SERVER_IS_DOWN(mon_srv->server) && mon_srv->mon_err_count == 0);
}
/**
* Launch a script
* @param mon Owning monitor
* @param ptr The server which has changed state
* @param script Script to execute
*/
void
monitor_launch_script(MONITOR* mon, MONITOR_SERVERS* ptr, char* script)
{
char nodelist[PATH_MAX + MON_ARG_MAX + 1] = {'\0'};
char initiator[strlen(ptr->server->name) + 24]; // Extra space for port
snprintf(initiator, sizeof(initiator), "%s:%d", ptr->server->name, ptr->server->port);
mon_append_node_names(mon->databases, nodelist, PATH_MAX + MON_ARG_MAX);
EXTERNCMD* cmd = externcmd_allocate(script);
if (cmd == NULL)
{
MXS_ERROR("Failed to initialize script: %s", script);
return;
}
externcmd_substitute_arg(cmd, "[$]INITIATOR", initiator);
externcmd_substitute_arg(cmd, "[$]EVENT", mon_get_event_name(ptr));
externcmd_substitute_arg(cmd, "[$]NODELIST", nodelist);
if (externcmd_execute(cmd))
{
MXS_ERROR("Failed to execute script "
"'%s' on server state change event %s.",
script, mon_get_event_name(ptr));
}
externcmd_free(cmd);
}
/**
* Parse a string of event names to an array with enabled events.
* @param events Pointer to an array of boolean values
* @param count Size of the array
* @param string String to parse
* @return 0 on success. 1 when an error has occurred or an unexpected event was
* found.
*/
int
mon_parse_event_string(bool* events, size_t count, char* string)
{
char *tok, *saved;
monitor_event_t event;
tok = strtok_r(string, ",| ", &saved);
if (tok == NULL)
{
return -1;
}
while (tok)
{
event = mon_name_to_event(tok);
if (event == UNDEFINED_MONITOR_EVENT)
{
MXS_ERROR("Invalid event name %s", tok);
return -1;
}
events[event] = true;
tok = strtok_r(NULL, ",| ", &saved);
}
return 0;
}
/**
* Connect to a database. This will always leave a valid database handle in the
* database->con pointer. This allows the user to call MySQL C API functions to
* find out the reason of the failure.
* @param mon Monitor
* @param database Monitored database
* @return MONITOR_CONN_OK if the connection is OK else the reason for the failure
*/
connect_result_t
mon_connect_to_db(MONITOR* mon, MONITOR_SERVERS *database)
{
connect_result_t rval = MONITOR_CONN_OK;
/** Return if the connection is OK */
if (database->con && mysql_ping(database->con) == 0)
{
return rval;
}
int connect_timeout = mon->connect_timeout;
int read_timeout = mon->read_timeout;
int write_timeout = mon->write_timeout;
char *uname = database->server->monuser ? database->server->monuser : mon->user;
char *passwd = database->server->monpw ? database->server->monpw : mon->password;
char *dpwd = decryptPassword(passwd);
if (database->con)
{
mysql_close(database->con);
}
database->con = mysql_init(NULL);
mysql_options(database->con, MYSQL_OPT_CONNECT_TIMEOUT, (void *) &connect_timeout);
mysql_options(database->con, MYSQL_OPT_READ_TIMEOUT, (void *) &read_timeout);
mysql_options(database->con, MYSQL_OPT_WRITE_TIMEOUT, (void *) &write_timeout);
time_t start = time(NULL);
bool result = (mysql_real_connect(database->con,
database->server->name,
uname,
dpwd,
NULL,
database->server->port,
NULL,
0) != NULL);
time_t end = time(NULL);
if (!result)
{
if ((int) difftime(end, start) >= connect_timeout)
{
rval = MONITOR_CONN_TIMEOUT;
}
else
{
rval = MONITOR_CONN_REFUSED;
}
}
free(dpwd);
return rval;
}
/**
* Log an error about the failure to connect to a backend server
* and why it happened.
* @param database Backend database
* @param rval Return value of mon_connect_to_db
*/
void
mon_log_connect_error(MONITOR_SERVERS* database, connect_result_t rval)
{
MXS_ERROR(rval == MONITOR_CONN_TIMEOUT ?
"Monitor timed out when connecting to "
"server %s:%d : \"%s\"" :
"Monitor was unable to connect to "
"server %s:%d : \"%s\"",
database->server->name,
database->server->port,
mysql_error(database->con));
}

36
server/include/def_monitor_event.h Normal file
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@ -0,0 +1,36 @@
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/*
* File: def_event.h
* Author: mbrampton
*
* Created on 18 November 2015, 15:21
*/
ADDITEM( UNDEFINED_MONITOR_EVENT, undefined ),
ADDITEM( MASTER_DOWN_EVENT, master_down ),
ADDITEM( MASTER_UP_EVENT, master_up ),
ADDITEM( SLAVE_DOWN_EVENT, slave_down ),
ADDITEM( SLAVE_UP_EVENT, slave_up ),
ADDITEM( SERVER_DOWN_EVENT, server_down ),
ADDITEM( SERVER_UP_EVENT, server_up ),
ADDITEM( SYNCED_DOWN_EVENT, synced_down ),
ADDITEM( SYNCED_UP_EVENT, synced_up ),
ADDITEM( DONOR_DOWN_EVENT, donor_down ),
ADDITEM( DONOR_UP_EVENT, donor_up ),
ADDITEM( NDB_DOWN_EVENT, ndb_down ),
ADDITEM( NDB_UP_EVENT, ndb_up ),
ADDITEM( LOST_MASTER_EVENT, lost_master ),
ADDITEM( LOST_SLAVE_EVENT, lost_slave ),
ADDITEM( LOST_SYNCED_EVENT, lost_synced ),
ADDITEM( LOST_DONOR_EVENT, lost_donor ),
ADDITEM( LOST_NDB_EVENT, lost_ndb ),
ADDITEM( NEW_MASTER_EVENT, new_master ),
ADDITEM( NEW_SLAVE_EVENT, new_slave ),
ADDITEM( NEW_SYNCED_EVENT, new_synced ),
ADDITEM( NEW_DONOR_EVENT, new_donor ),
ADDITEM( NEW_NDB_EVENT, new_ndb ),

55
server/include/monitor.h
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@ -20,8 +20,11 @@
#include <mysql.h>
#include <server.h>
#include <dcb.h>
#include <log_manager.h>
#include <resultset.h>
#include <maxconfig.h>
#include <externcmd.h>
#include <secrets.h>
/**
* @file monitor.h The interface to the monitor module
@ -39,6 +42,8 @@
* 30/10/14 Massimiliano Pinto Addition of disableMasterFailback
* 07/11/14 Massimiliano Pinto Addition of setNetworkTimeout
* 19/02/15 Mark Riddoch Addition of monitorGetList
* 19/11/15 Martin Brampton Automation of event and name declaration, absorption
* of what was formerly monitor_common.h
*
* @endverbatim
*/
@ -105,6 +110,18 @@ typedef enum
MONITOR_WRITE_TIMEOUT = 2
} monitor_timeouts_t;
/*
* Results of attempt at database connection for monitoring
*/
typedef enum
{
MONITOR_CONN_OK,
MONITOR_CONN_REFUSED,
MONITOR_CONN_TIMEOUT
} connect_result_t;
#define MON_ARG_MAX 8192
#define DEFAULT_CONNECT_TIMEOUT 3
#define DEFAULT_READ_TIMEOUT 1
#define DEFAULT_WRITE_TIMEOUT 2
@ -118,6 +135,31 @@ typedef enum
#define MONITOR_DEFAULT_ID 1UL // unsigned long value
#define MONITOR_MAX_NUM_SLAVES 20 //number of MySQL slave servers associated to a MySQL master server
/*
* Create declarations of the enum for monitor events and also the array of
* structs containing the matching names. The data is taken from def_monitor_event.h
*/
#undef ADDITEM
#define ADDITEM( _event_type, _event_name ) _event_type
typedef enum
{
#include "def_monitor_event.h"
MAX_MONITOR_EVENT
} monitor_event_t;
#undef ADDITEM
typedef struct monitor_def_s
{
char name[30];
} monitor_def_t;
#undef ADDITEM
#define ADDITEM( _event_type, _event_name ) { #_event_name }
static const monitor_def_t monitor_event_definitions[MAX_MONITOR_EVENT] =
{
#include "def_monitor_event.h"
};
#undef ADDITEM
/**
* The linked list of servers that are being monitored by the monitor module.
@ -175,4 +217,17 @@ extern void monitorSetNetworkTimeout(MONITOR *, int, int);
extern RESULTSET *monitorGetList();
bool check_monitor_permissions(MONITOR* monitor);
monitor_event_t mon_name_to_event(char* tok);
void mon_append_node_names(MONITOR_SERVERS* start, char* str, int len);
monitor_event_t mon_get_event_type(MONITOR_SERVERS* node);
char* mon_get_event_name(MONITOR_SERVERS* node);
void monitor_clear_pending_status(MONITOR_SERVERS *ptr, int bit);
void monitor_set_pending_status(MONITOR_SERVERS *ptr, int bit);
bool mon_status_changed(MONITOR_SERVERS* mon_srv);
bool mon_print_fail_status(MONITOR_SERVERS* mon_srv);
void monitor_launch_script(MONITOR* mon, MONITOR_SERVERS* ptr, char* script);
int mon_parse_event_string(bool* events, size_t count, char* string);
connect_result_t mon_connect_to_db(MONITOR* mon, MONITOR_SERVERS *database);
void mon_log_connect_error(MONITOR_SERVERS* database, connect_result_t rval);
#endif

1
server/modules/monitor/galeramon.h
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@ -22,7 +22,6 @@
#include <stdlib.h>
#include <string.h>
#include <monitor.h>
#include <monitor_common.h>
#include <spinlock.h>
#include <externcmd.h>
#include <thread.h>

1
server/modules/monitor/mmmon.h
View File

@ -32,7 +32,6 @@
#include <dcb.h>
#include <modinfo.h>
#include <maxconfig.h>
#include <monitor_common.h>
#include <externcmd.h>
/**

558
server/modules/monitor/monitor_common.c
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@ -1,558 +0,0 @@
/*
* This file is distributed as part of the MariaDB Corporation MaxScale. It is free
* software: you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation,
* version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright MariaDB Corporation Ab 2013-2015
*/
#include <monitor_common.h>
#include <maxscale_pcre2.h>
monitor_event_t mon_name_to_event(char* tok);
/**
* Set a pending status bit in the monitor server
*
* @param server The server to update
* @param bit The bit to clear for the server
*/
void monitor_set_pending_status(MONITOR_SERVERS *ptr, int bit)
{
ptr->pending_status |= bit;
}
/**
* Clear a pending status bit in the monitor server
*
* @param server The server to update
* @param bit The bit to clear for the server
*/
void monitor_clear_pending_status(MONITOR_SERVERS *ptr, int bit)
{
ptr->pending_status &= ~bit;
}
monitor_event_t mon_get_event_type(MONITOR_SERVERS* node)
{
unsigned int prev = node->mon_prev_status;
if ((prev & (SERVER_MASTER | SERVER_RUNNING)) == (SERVER_MASTER | SERVER_RUNNING) &&
SERVER_IS_DOWN(node->server))
{
return MASTER_DOWN_EVENT;
}
if ((prev & (SERVER_RUNNING)) == 0 &&
SERVER_IS_RUNNING(node->server) && SERVER_IS_MASTER(node->server))
{
return MASTER_UP_EVENT;
}
if ((prev & (SERVER_SLAVE | SERVER_RUNNING)) == (SERVER_SLAVE | SERVER_RUNNING) &&
SERVER_IS_DOWN(node->server))
{
return SLAVE_DOWN_EVENT;
}
if ((prev & (SERVER_RUNNING)) == 0 &&
SERVER_IS_RUNNING(node->server) && SERVER_IS_SLAVE(node->server))
{
return SLAVE_UP_EVENT;
}
/** Galera specific events */
if ((prev & (SERVER_JOINED | SERVER_RUNNING)) == (SERVER_JOINED | SERVER_RUNNING) &&
SERVER_IS_DOWN(node->server))
{
return SYNCED_DOWN_EVENT;
}
if ((prev & (SERVER_RUNNING)) == 0 &&
SERVER_IS_RUNNING(node->server) && SERVER_IS_JOINED(node->server))
{
return SYNCED_UP_EVENT;
}
/** NDB events*/
if ((prev & (SERVER_NDB | SERVER_RUNNING)) == (SERVER_NDB | SERVER_RUNNING) &&
SERVER_IS_DOWN(node->server))
{
return NDB_DOWN_EVENT;
}
if ((prev & (SERVER_RUNNING)) == 0 &&
SERVER_IS_RUNNING(node->server) && SERVER_IS_NDB(node->server))
{
return NDB_UP_EVENT;
}
if ((prev & (SERVER_RUNNING)) == SERVER_RUNNING &&
SERVER_IS_RUNNING(node->server) && SERVER_IS_MASTER(node->server))
{
return NEW_MASTER_EVENT;
}
if ((prev & (SERVER_RUNNING)) == SERVER_RUNNING &&
SERVER_IS_RUNNING(node->server) && SERVER_IS_SLAVE(node->server))
{
return NEW_SLAVE_EVENT;
}
/** Status loss events */
if ((prev & (SERVER_RUNNING | SERVER_MASTER)) == (SERVER_RUNNING | SERVER_MASTER) &&
SERVER_IS_RUNNING(node->server) && !SERVER_IS_MASTER(node->server))
{
return LOST_MASTER_EVENT;
}
if ((prev & (SERVER_RUNNING | SERVER_SLAVE)) == (SERVER_RUNNING | SERVER_SLAVE) &&
SERVER_IS_RUNNING(node->server) && !SERVER_IS_SLAVE(node->server))
{
return LOST_SLAVE_EVENT;
}
if ((prev & (SERVER_RUNNING | SERVER_JOINED)) == (SERVER_RUNNING | SERVER_JOINED) &&
SERVER_IS_RUNNING(node->server) && !SERVER_IS_JOINED(node->server))
{
return LOST_SYNCED_EVENT;
}
if ((prev & (SERVER_RUNNING | SERVER_NDB)) == (SERVER_RUNNING | SERVER_NDB) &&
SERVER_IS_RUNNING(node->server) && !SERVER_IS_NDB(node->server))
{
return LOST_NDB_EVENT;
}
/** Generic server failure */
if ((prev & SERVER_RUNNING) == 0 &&
SERVER_IS_RUNNING(node->server))
{
return SERVER_UP_EVENT;
}
if ((prev & SERVER_RUNNING) == SERVER_RUNNING &&
SERVER_IS_DOWN(node->server))
{
return SERVER_DOWN_EVENT;
}
/** Something else, most likely a state that does not matter.
* For example SERVER_DOWN -> SERVER_MASTER|SERVER_DOWN still results in a
* server state equal to not running.*/
return UNDEFINED_MONITOR_EVENT;
}
char* mon_get_event_name(MONITOR_SERVERS* node)
{
switch (mon_get_event_type(node))
{
case UNDEFINED_MONITOR_EVENT:
return "undefined";
case MASTER_DOWN_EVENT:
return "master_down";
case MASTER_UP_EVENT:
return "master_up";
case SLAVE_DOWN_EVENT:
return "slave_down";
case SLAVE_UP_EVENT:
return "slave_up";
case SERVER_DOWN_EVENT:
return "server_down";
case SERVER_UP_EVENT:
return "server_up";
case SYNCED_DOWN_EVENT:
return "synced_down";
case SYNCED_UP_EVENT:
return "synced_up";
case DONOR_DOWN_EVENT:
return "donor_down";
case DONOR_UP_EVENT:
return "donor_up";
case NDB_DOWN_EVENT:
return "ndb_down";
case NDB_UP_EVENT:
return "ndb_up";
case LOST_MASTER_EVENT:
return "lost_master";
case LOST_SLAVE_EVENT:
return "lost_slave";
case LOST_SYNCED_EVENT:
return "lost_synced";
case LOST_DONOR_EVENT:
return "lost_donor";
case LOST_NDB_EVENT:
return "lost_ndb";
case NEW_MASTER_EVENT:
return "new_master";
case NEW_SLAVE_EVENT:
return "new_slave";
case NEW_SYNCED_EVENT:
return "new_synced";
case NEW_DONOR_EVENT:
return "new_donor";
case NEW_NDB_EVENT:
return "new_ndb";
default:
return "MONITOR_EVENT_FAILURE";
}
}
/**
* Create a list of running servers
* @param start Monitored servers
* @param dest Destination where the string is formed
* @param len Length of @c dest
*/
void mon_append_node_names(MONITOR_SERVERS* start, char* dest, int len)
{
MONITOR_SERVERS* ptr = start;
bool first = true;
int slen = strlen(dest);
char arr[MAX_SERVER_NAME_LEN + 32]; // Some extra space for port
while (ptr && slen < len)
{
if (SERVER_IS_RUNNING(ptr->server))
{
if (!first)
{
strncat(dest, ",", len);
}
first = false;
snprintf(arr, sizeof(arr), "%s:%d", ptr->server->name, ptr->server->port);
strncat(dest, arr, len);
slen = strlen(dest);
}
ptr = ptr->next;
}
}
/**
* Check if current monitored server status has changed
*
* @param mon_srv The monitored server
* @return true if status has changed or false
*/
bool mon_status_changed(
MONITOR_SERVERS* mon_srv)
{
bool succp;
/** This is the first time the server was set with a status*/
if (mon_srv->mon_prev_status == -1)
{
return false;
}
if (mon_srv->mon_prev_status != mon_srv->server->status)
{
succp = true;
}
else
{
succp = false;
}
return succp;
}
/**
* Check if current monitored server has a loggable failure status
*
* @param mon_srv The monitored server
* @return true if failed status can be logged or false
*/
bool mon_print_fail_status(
MONITOR_SERVERS* mon_srv)
{
bool succp;
int errcount = mon_srv->mon_err_count;
if (SERVER_IS_DOWN(mon_srv->server) && errcount == 0)
{
succp = true;
}
else
{
succp = false;
}
return succp;
}
/**
* Launch a script
* @param mon Owning monitor
* @param ptr The server which has changed state
* @param script Script to execute
*/
void monitor_launch_script(MONITOR* mon, MONITOR_SERVERS* ptr, char* script)
{
char nodelist[PATH_MAX + MON_ARG_MAX + 1] = {'\0'};
char initiator[strlen(ptr->server->name) + 24]; // Extra space for port
snprintf(initiator, sizeof(initiator), "%s:%d", ptr->server->name, ptr->server->port);
mon_append_node_names(mon->databases, nodelist, PATH_MAX + MON_ARG_MAX);
EXTERNCMD* cmd = externcmd_allocate(script);
if (cmd == NULL)
{
MXS_ERROR("Failed to initialize script: %s", script);
return;
}
externcmd_substitute_arg(cmd, "[$]INITIATOR", initiator);
externcmd_substitute_arg(cmd, "[$]EVENT", mon_get_event_name(ptr));
externcmd_substitute_arg(cmd, "[$]NODELIST", nodelist);
if (externcmd_execute(cmd))
{
MXS_ERROR("Failed to execute script "
"'%s' on server state change event %s.",
script, mon_get_event_name(ptr));
}
externcmd_free(cmd);
}
/**
* Parse a string of event names to an array with enabled events.
* @param events Pointer to an array of boolean values
* @param count Size of the array
* @param string String to parse
* @return 0 on success. 1 when an error has occurred or an unexpected event was
* found.
*/
int mon_parse_event_string(bool* events, size_t count, char* string)
{
char *tok, *saved;
monitor_event_t event;
tok = strtok_r(string, ",| ", &saved);
if (tok == NULL)
{
return -1;
}
while (tok)
{
event = mon_name_to_event(tok);
if (event == UNDEFINED_MONITOR_EVENT)
{
MXS_ERROR("Invalid event name %s", tok);
return -1;
}
events[event] = true;
tok = strtok_r(NULL, ",| ", &saved);
}
return 0;
}
monitor_event_t mon_name_to_event(char* tok)
{
if (!strcasecmp("master_down", tok))
{
return MASTER_DOWN_EVENT;
}
else if (!strcasecmp("master_up", tok))
{
return MASTER_UP_EVENT;
}
else if (!strcasecmp("slave_down", tok))
{
return SLAVE_DOWN_EVENT;
}
else if (!strcasecmp("slave_up", tok))
{
return SLAVE_UP_EVENT;
}
else if (!strcasecmp("server_down", tok))
{
return SERVER_DOWN_EVENT;
}
else if (!strcasecmp("server_up", tok))
{
return SERVER_UP_EVENT;
}
else if (!strcasecmp("synced_down", tok))
{
return SYNCED_DOWN_EVENT;
}
else if (!strcasecmp("synced_up", tok))
{
return SYNCED_UP_EVENT;
}
else if (!strcasecmp("donor_down", tok))
{
return DONOR_DOWN_EVENT;
}
else if (!strcasecmp("donor_up", tok))
{
return DONOR_UP_EVENT;
}
else if (!strcasecmp("ndb_down", tok))
{
return NDB_DOWN_EVENT;
}
else if (!strcasecmp("ndb_up", tok))
{
return NDB_UP_EVENT;
}
else if (!strcasecmp("lost_master", tok))
{
return LOST_MASTER_EVENT;
}
else if (!strcasecmp("lost_slave", tok))
{
return LOST_SLAVE_EVENT;
}
else if (!strcasecmp("lost_synced", tok))
{
return LOST_SYNCED_EVENT;
}
else if (!strcasecmp("lost_donor", tok))
{
return LOST_DONOR_EVENT;
}
else if (!strcasecmp("lost_ndb", tok))
{
return LOST_NDB_EVENT;
}
else if (!strcasecmp("new_master", tok))
{
return NEW_MASTER_EVENT;
}
else if (!strcasecmp("new_slave", tok))
{
return NEW_SLAVE_EVENT;
}
else if (!strcasecmp("new_synced", tok))
{
return NEW_SYNCED_EVENT;
}
else if (!strcasecmp("new_donor", tok))
{
return NEW_DONOR_EVENT;
}
else if (!strcasecmp("new_ndb", tok))
{
return NEW_NDB_EVENT;
}
return UNDEFINED_MONITOR_EVENT;
}
/**
* Connect to a database. This will always leave a valid database handle in the
* database->con pointer. This allows the user to call MySQL C API functions to
* find out the reason of the failure.
* @param mon Monitor
* @param database Monitored database
* @return MONITOR_CONN_OK if the connection is OK else the reason for the failure
*/
connect_result_t mon_connect_to_db(MONITOR* mon, MONITOR_SERVERS *database)
{
connect_result_t rval = MONITOR_CONN_OK;
/** Return if the connection is OK */
if (database->con && mysql_ping(database->con) == 0)
{
return rval;
}
int connect_timeout = mon->connect_timeout;
int read_timeout = mon->read_timeout;
int write_timeout = mon->write_timeout;
char *uname = database->server->monuser ? database->server->monuser : mon->user;
char *passwd = database->server->monpw ? database->server->monpw : mon->password;
char *dpwd = decryptPassword(passwd);
if (database->con)
{
mysql_close(database->con);
}
database->con = mysql_init(NULL);
mysql_options(database->con, MYSQL_OPT_CONNECT_TIMEOUT, (void *) &connect_timeout);
mysql_options(database->con, MYSQL_OPT_READ_TIMEOUT, (void *) &read_timeout);
mysql_options(database->con, MYSQL_OPT_WRITE_TIMEOUT, (void *) &write_timeout);
time_t start = time(NULL);
bool result = (mysql_real_connect(database->con,
database->server->name,
uname,
dpwd,
NULL,
database->server->port,
NULL,
0) != NULL);
time_t end = time(NULL);
if (!result)
{
if ((int) difftime(end, start) >= connect_timeout)
{
rval = MONITOR_CONN_TIMEOUT;
}
else
{
rval = MONITOR_CONN_REFUSED;
}
}
free(dpwd);
return rval;
}
/**
* Log an error about the failure to connect to a backend server
* and why it happened.
* @param database Backend database
* @param rval Return value of mon_connect_to_db
*/
void mon_log_connect_error(MONITOR_SERVERS* database, connect_result_t rval)
{
if (rval == MONITOR_CONN_TIMEOUT)
{
MXS_ERROR("Monitor timed out when connecting to "
"server %s:%d : \"%s\"",
database->server->name,
database->server->port,
mysql_error(database->con));
}
else
{
MXS_ERROR("Monitor was unable to connect to "
"server %s:%d : \"%s\"",
database->server->name,
database->server->port,
mysql_error(database->con));
}
}

87
server/modules/monitor/monitor_common.h
View File

@ -1,87 +0,0 @@
#ifndef _MONITOR_COMMON_HG
#define _MONITOR_COMMON_HG
/*
* This file is distributed as part of the MariaDB Corporation MaxScale. It is free
* software: you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation,
* version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright MariaDB Corporation Ab 2013-2015
*/
#include <server.h>
#include <mysql.h>
#include <monitor.h>
#include <log_manager.h>
#include <externcmd.h>
#include <secrets.h>
/**
* @file monitor_common.h - The generic monitor structures all monitors use
*
* Revision History
*
* Date Who Description
* 07/05/15 Markus Makela Initial Implementation
* @endverbatim
*/
#define MON_ARG_MAX 8192
/** Monitor events that are caused by servers moving from
* one state to another.*/
typedef enum
{
UNDEFINED_MONITOR_EVENT,
MASTER_DOWN_EVENT,
MASTER_UP_EVENT,
SLAVE_DOWN_EVENT,
SLAVE_UP_EVENT,
SERVER_DOWN_EVENT,
SERVER_UP_EVENT,
SYNCED_DOWN_EVENT,
SYNCED_UP_EVENT,
DONOR_DOWN_EVENT,
DONOR_UP_EVENT,
NDB_DOWN_EVENT,
NDB_UP_EVENT,
LOST_MASTER_EVENT,
LOST_SLAVE_EVENT,
LOST_SYNCED_EVENT,
LOST_DONOR_EVENT,
LOST_NDB_EVENT,
NEW_MASTER_EVENT,
NEW_SLAVE_EVENT,
NEW_SYNCED_EVENT,
NEW_DONOR_EVENT,
NEW_NDB_EVENT,
MAX_MONITOR_EVENT
} monitor_event_t;
typedef enum
{
MONITOR_CONN_OK,
MONITOR_CONN_REFUSED,
MONITOR_CONN_TIMEOUT
} connect_result_t;
void mon_append_node_names(MONITOR_SERVERS* start, char* str, int len);
monitor_event_t mon_get_event_type(MONITOR_SERVERS* node);
char* mon_get_event_name(MONITOR_SERVERS* node);
void monitor_clear_pending_status(MONITOR_SERVERS *ptr, int bit);
void monitor_set_pending_status(MONITOR_SERVERS *ptr, int bit);
bool mon_status_changed(MONITOR_SERVERS* mon_srv);
bool mon_print_fail_status(MONITOR_SERVERS* mon_srv);
void monitor_launch_script(MONITOR* mon, MONITOR_SERVERS* ptr, char* script);
int mon_parse_event_string(bool* events, size_t count, char* string);
connect_result_t mon_connect_to_db(MONITOR* mon, MONITOR_SERVERS *database);
void mon_log_connect_error(MONITOR_SERVERS* database, connect_result_t rval);
#endif

1
server/modules/monitor/mysqlmon.h
View File

@ -32,7 +32,6 @@
#include <dcb.h>
#include <modinfo.h>
#include <maxconfig.h>
#include <monitor_common.h>
#include <externcmd.h>
/**

1
server/modules/monitor/ndbclustermon.h
View File

@ -32,7 +32,6 @@
#include <dcb.h>
#include <modinfo.h>
#include <maxconfig.h>
#include <monitor_common.h>
#include <externcmd.h>
/**