mysql-mmm多实例部署

说明

主从配置在本文档略过，主要是mysql-mmm多实例的部署。文档中涉及的一些基础知识不做详细说明。

节点信息如下：

IP	主机名	角色
192.168.0.1	db1	master1
192.168.0.2	db2	master2
192.168.0.3	db3	slave1
192.168.0.4	db4	slave2
192.168.0.5	db5	管理节点

1、软件安装

为了简单，本次安装都是通过yum来进行。配置epel的yum源

yum instll mysql-mmm mysql-mmm-agent mysql-mmm-monitor

2、配置

yum安装的mysql-mmm的配置文件路径是在 /etc/mysql-mmm/中，我们需要修改如下几个文件mmm_agent.conf，mmm_common.conf，mmm_mon_log.conf。由于是多实例的部署，所以默认提供的文件将不起作用。我应用中是以mysql的多实例端口，作为配置文件和启动服务的参数。默认安装的mysql-mmm启动命令也需要相应修改，稍后会提供方法。

创建一个slave密码为slave的帐号，用于mysql主从同步，以及mysql-mmm管理和其它使用。

比如：mysql端口为3301，那配置文件为mmm_agent_3301.conf

A>配置文件 【/etc/mysql/mmm_common_3301.conf】 这个文件要在4个节点中都存在

active_master_role      writer
<host default>
    cluster_interface       bond1
    pid_path                /var/run/mysql-mmm/mmm_agentd_3301.pid
    bin_path                /usr/libexec/mysql-mmm/
    replication_user        slave
    replication_password    slave
    agent_user              slave
    agent_password          slave
    agent_port              43301
</host>
<host db1>
    ip      192.168.0.1
    mysql_port  3301
    mode    master
    peer    db2
</host>
<host db2>
    ip      192.168.0.2
    mysql_port  3301
    mode    master
    peer    db1
</host>
<host db3>
    ip      192.168.0.3
    mysql_port  3301
    mode    slave
</host>
<host db4>
    ip      192.168.0.4
    mysql_port  3301
    mode    slave
</host>
<role writer>
    hosts   db1, db2
    ips     192.168.0.100
    mode    exclusive
</role>
<role reader>
    hosts   db3, db4
    ips     192.168.0.101,192.168.0.102
    mode    balanced
</role>

B>配置文件 【/etc/mysql-mmm/mmm_agent_3301.conf】 不同的节点上，this以当前节点名为准

include mmm_common_3301.conf
# The 'this' variable refers to this server.  Proper operation requires
# that 'this' server (db1 by default), as well as all other servers, have the
# proper IP addresses set in mmm_common.conf.
this db1

C>配置文件 【/etc/mysql-mmm/mmm_mon_3301.conf 】这个文件只存在管理节点上

include mmm_common_3301.conf
<monitor>
    ip                  192.168.0.5
    port                53301
    pid_path            /var/run/mysql-mmm/mmm_mond_3301.pid
    bin_path            /usr/libexec/mysql-mmm
    status_path         /var/lib/mysql-mmm/mmm_mond.status
    ping_ips           192.168.0.1,192.168.0.2,192.168.0.3,192.168.0.4,192.168.201.5
    auto_set_online     60
    # The kill_host_bin does not exist by default, though the monitor will
    # throw a warning about it missing.  See the section 5.10 "Kill Host
    # Functionality" in the PDF documentation.
    #
    # kill_host_bin     /usr/libexec/mysql-mmm/monitor/kill_host
    #
</monitor>
<host default>
    monitor_user        slave
    monitor_password    slave
</host>
debug 0

3、修改mysql-mmm启动脚本

#!/bin/sh
#
# mysql-mmm-agent    This shell script takes care of starting and stopping
#                    the mmm agent daemon.
#
# chkconfig: - 64 36
# description:  MMM Agent.
# processname: mmm_agentd
# config: /etc/mysql-mmm/mmm_agent.conf
# pidfile: /var/run/mysql-mmm/mmm_agentd.pid
# Source function library and defaults file.
. /etc/rc.d/init.d/functions
. /etc/default/mysql-mmm-agent
# Paths
CLUSTER=$2
if [ "$CLUSTER" != "" ]; then
        MMMD_AGENT_BIN="/usr/sbin/mmm_agentd @$CLUSTER"
        MMMD_AGENT_PIDFILE="/var/run/mysql-mmm/mmm_agentd_$CLUSTER.pid"
        LOCKFILE="/var/lock/subsys/mysql-mmm-agentd_$CLUSTER"
else
        MMMD_AGENT_BIN="/usr/sbin/mmm_agentd"
        MMMD_AGENT_PIDFILE="/var/run/mysql-mmm/mmm_agentd.pid"
        LOCKFILE="/var/lock/subsys/mysql-mmm-agentd"
fi
prog='MMM Agent Daemon'
start() {
        if [ "${ENABLED}" != "1" ]; then
                echo "$prog is disabled!"
                exit 1
        fi
        echo -n "Starting $prog: "
        if [ -s $MMMD_AGENT_PIDFILE ] && kill -0 `cat $MMMD_AGENT_PIDFILE` 2> /dev/null; then
            echo " already running."
            exit 0
        fi
        daemon $MMMD_AGENT_BIN
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && touch $LOCKFILE
        return $RETVAL
}
stop() {
        # Stop daemon.
        echo -n "Stopping $prog: "
        killproc -p $MMMD_AGENT_PIDFILE $MMMD_AGENT_BIN
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && rm -f $LOCKFILE
        return $RETVAL
}
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  status)
        status -p $MMMD_AGENT_PIDFILE $MMMD_AGENT_BIN
        RETVAL=$?
        ;;
  restart|reload)
        stop
        start
        ;;
  condrestart)
        if [ -f $LOCKFILE ]; then
                stop
                start
        fi
        ;;
  *)
        echo "Usage: $0 {start|stop|restart|condrestart|status}"
        ;;
esac
exit $RETVAL

4、修改mysql-mmm监控脚本

#!/bin/sh
#
# mysql-mmm-monitor  This shell script takes care of starting and stopping
#                    the mmm monitoring daemon.
#
# chkconfig: - 64 36
# description:  MMM Monitor.
# processname: mmm_mond
# config: /etc/mysql-mmm/mmm_mon.conf
# pidfile: /var/run/mysql-mmm/mmm_mond.pid
# Source function library and defaults file.
. /etc/rc.d/init.d/functions
. /etc/default/mysql-mmm-monitor
# Cluster name (it can be empty for default cases)
CLUSTER=$2
LOCKFILE='/var/lock/subsys/mysql-mmm-monitor'
prog='MMM Monitor Daemon'
if [ "$CLUSTER" != "" ]; then
        MMMD_MON_BIN="/usr/sbin/mmm_mond @$CLUSTER"
        MMMD_MON_PIDFILE="/var/run/mysql-mmm/mmm_mond_$CLUSTER.pid"
else
        MMMD_MON_BIN="/usr/sbin/mmm_mond"
        MMMD_MON_PIDFILE="/var/run/mysql-mmm/mmm_mond.pid"
fi
start() {
        if [ "${ENABLED}" != "1" ]; then
                echo "$prog is disabled!"
                exit 1
        fi
        echo -n "Starting $prog: "
        if [ -s $MMMD_MON_PIDFILE ] && kill -0 `cat $MMMD_MON_PIDFILE` 2> /dev/null; then
            echo " already running."
            exit 0
        fi
        daemon $MMMD_MON_BIN
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && touch $LOCKFILE
        return $RETVAL
}
stop() {
        # Stop daemon.
        echo -n "Stopping $prog: "
        killproc -p $MMMD_MON_PIDFILE $MMMD_MON_BIN
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && rm -f $LOCKFILE
        return $RETVAL
}
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  status)
        status -p $MMMD_MON_PIDFILE $MMMD_MON_BIN
        RETVAL=$?
        ;;
  restart|reload)
        stop
        start
        ;;
  condrestart)
        if [ -f $LOCKFILE ]; then
                stop
                start
        fi
        ;;
  *)
        echo "Usage: $0 {start|stop|restart|condrestart|status}"
        ;;
esac
exit $RETVAL

5、启动和监控方法

/etc/init.d/mysql-mmm-agent start 3301

/etc/init.d/mysql-mmm-agent stop 3301

/etc/init.d/mysql-mmm-monitor start 3301

/etc/init.d/mysql-mmm-monitor stop 3301

mmm_control @3301 show

mmm_control @3301 checks all