Keepalive+Atlas+DRBD+Heartbeat+mysql配置系列(三):keepalive+atlas实现mysql读写分离
系统:centos 7(64位)
环境:
主atlas ip: 10.0.2.3
备atlas ip: 10.0.2.4
keepalive vip: 10.0.2.2
mysql vip: 10.0.2.10
1.安装atlas
wget --no-check-certificate https://github.com/Qihoo360/Atlas/releases/download/2.2.1/Atlas-2.2.1.el6.x86_64.rpm
rpm -ivh Atlas-2.2.1.el6.x86_64.rpm
2.配置atlas(主备都一样的配置)
先在mysql主从里都添加个账atlas的账号:
GRANT ALL PRIVILEGES ON *.* TO 'atlas'@'%' IDENTIFIED BY '123456';
flush privileges;
给atlas账号的密码加密:
/usr/local/mysql-proxy/bin/encrypt 123456
RePBqJ+5gI4=
vim /usr/local/mysql-proxy/conf/test.cnf
[mysql-proxy]
#带#号的为非必需的配置项目
#管理接口的用户名
admin-username = admin
#管理接口的密码
admin-password = admin
#Atlas后端连接的MySQL主库的IP和端口，可设置多项，用逗号分隔
proxy-backend-addresses = 10.0.2.10:3306
#Atlas后端连接的MySQL从库的IP和端口，@后面的数字代表权重，用来作负载均衡，若省略则默认为1，可设置多项，用逗号分隔
#proxy-read-only-backend-addresses = 127.0.0.1:3305@1
proxy-read-only-backend-addresses = 10.0.2.8:3306,10.0.2.9:3306
#用户名与其对应的加密过的MySQL密码，密码使用PREFIX/bin目录下的加密程序encrypt加密，下行的user1和user2为示例，将其替换为你的MySQL的用户名和加密密码！
#pwds = user1:+jKsgB3YAG8=, user2:GS+tr4TPgqc=
pwds= atlas:RePBqJ+5gI4=, root:TWbz0dlu35U=
#设置Atlas的运行方式，设为true时为守护进程方式，设为false时为前台方式，一般开发调试时设为false，线上运行时设为true,true后面不能有空格。
daemon = true
#设置Atlas的运行方式，设为true时Atlas会启动两个进程，一个为monitor，一个为worker，monitor在worker意外退出后会自动将其重启，设为false时只有worker，没有monitor，一般开发调试时设为false，线上运行时设为true,true后面不能有空格。
keepalive = true
#工作线程数，对Atlas的性能有很大影响，可根据情况适当设置
event-threads = 8
#日志级别，分为message、warning、critical、error、debug五个级别
log-level = message
#日志存放的路径
log-path = /usr/local/mysql-proxy/log
#SQL日志的开关，可设置为OFF、ON、REALTIME，OFF代表不记录SQL日志，ON代表记录SQL日志，REALTIME代表记录SQL日志且实时写入磁盘，默认为OFF
#sql-log = OFF
sql-log = ON
#慢日志输出设置。当设置了该参数时，则日志只输出执行时间超过sql-log-slow（单位：ms)的日志记录。不设置该参数则输出全部日志。
#sql-log-slow = 10
#实例名称，用于同一台机器上多个Atlas实例间的区分
#instance = test
#Atlas监听的工作接口IP和端口
proxy-address = 0.0.0.0:3306
#Atlas监听的管理接口IP和端口
admin-address = 0.0.0.0:2345
#分表设置，此例中person为库名，mt为表名，id为分表字段，3为子表数量，可设置多项，以逗号分隔，若不分表则不需要设置该项
#tables = person.mt.id.3
#默认字符集，设置该项后客户端不再需要执行SET NAMES语句
charset = utf8
#允许连接Atlas的客户端的IP，可以是精确IP，也可以是IP段，以逗号分隔，若不设置该项则允许所有IP连接，否则只允许列表中的IP连接
#client-ips = 127.0.0.1, 192.168.1
#Atlas前面挂接的LVS的物理网卡的IP(注意不是虚IP)，若有LVS且设置了client-ips则此项必须设置，否则可以不设置
#lvs-ips = 192.168.1.1
3.给atlas创建启动脚本
vim /etc/init.d/atlas
#!/bin/sh
#
#atlas: Atlas Daemon
#
# chkconfig: - 90 25
# description: Atlas Daemon
#
# Source function library.
start()
{
echo -n $"Starting atlas: "
/usr/local/mysql-proxy/bin/mysql-proxyd test start
echo
}
stop()
{
echo -n $"Shutting down atlas: "
/usr/local/mysql-proxy/bin/mysql-proxyd test stop
echo
}
ATLAS="/usr/local/mysql-proxy/bin/mysql-proxyd"
[ -f $ATLAS ] || exit 1
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 2
start
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
esac
exit 0
保存后执行:
chmod +x /etc/init.d/atlas
chkconfig atlas on
4.启动主备atlas
service atlas start
5.测试atlas
mysql -h 10.0.2.3 -P 2345 -u admin -p
mysql> SELECT * FROM backends;
+-------------+----------------+-------+------+
| backend_ndx | address | state | type |
+-------------+----------------+-------+------+
| 1 | 10.0.2.10:3306 | up | rw |
| 2 | 10.0.2.8:3306 | up | ro |
| 3 | 10.0.2.9:3306 | up | ro |
+-------------+----------------+-------+------+
3 rows in set (0.00 sec)
下面模拟程序连接atlas:
mysql -h 10.0.2.3 -P 3306 -u root -p
mysql> SHOW VARIABLES LIKE 'server_id';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id | 2 |
+---------------+-------+
1 row in set (0.00 sec)
mysql> SHOW VARIABLES LIKE 'server_id';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id | 3 |
+---------------+-------+
1 row in set (0.00 sec)
mysql> SHOW VARIABLES LIKE 'server_id';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id | 2 |
+---------------+-------+
1 row in set (0.00 sec)
从上面的结果可以看到mysql读写分离成功.
6.安装Keepalived实现Atlas高可用 (atlas主备都要安装)
yum -y install keepalived
7.配置
atlas主(10.0.2.3)上keepalive的配置:
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script Monitor_Atlas {
script "/etc/keepalived/monitor_atlas.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
mcast_src_ip 10.0.2.3
priority 100
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
}
virtual_ipaddress {
10.0.2.2
}
}
atlas备(10.0.2.4)上keepalive的配置:
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script Monitor_Atlas {
script "/etc/keepalived/monitor_atlas.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
mcast_src_ip 10.0.2.4
priority 95
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
}
virtual_ipaddress {
10.0.2.2
}
}
cat /etc/keepalived/monitor_atlas.sh
#!/bin/bash
if [ $(ps -ef |grep 'mysql-proxy' |grep -v 'grep' |wc -l) -eq "0" ];then
/etc/init.d/atlas start
sleep 5
if [ $(ps -ef |grep 'mysql-proxy' |grep -v 'grep' |wc -l) -eq "0" ];then
systemctl stop keepalived
systemctl restart network
fi
fi
8.修改/etc/sysconfig/keepalived
vi /etc/sysconfig/keepalived
# Options for keepalived. See `keepalived --help' output and keepalived(8) and
# keepalived.conf(5) man pages for a list of all options. Here are the most
# common ones :
#
# --vrrp -P Only run with VRRP subsystem.
# --check -C Only run with Health-checker subsystem.
# --dont-release-vrrp -V Dont remove VRRP VIPs & VROUTEs on daemon stop.
# --dont-release-ipvs -I Dont remove IPVS topology on daemon stop.
# --dump-conf -d Dump the configuration data.
# --log-detail -D Detailed log messages.
# --log-facility -S 0-7 Set local syslog facility (default=LOG_DAEMON)
#
#KEEPALIVED_OPTIONS="-D"
KEEPALIVED_OPTIONS="-D -d -S 0" ##在最后添加此行
9.修改/etc/rsyslog.conf
vi /etc/rsyslog.conf
##在最后添加此行：
local0.* /var/log/keepalived.log
systemctl restart rsyslog
10.验证
这里就只说说怎么弄,具体的可以看你们自己选择:
1)可以把主的atlas给停了,看看keepalive是否能切换.
2)当然也可以只停keepalive,来验证是否可以连接atlas.
rocdk890
Michael
ade
西门堵车
朱祁镇
r1p
milton010
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