mysql 主主+keepalive HA 模式
1.安装mysql数据库
2.修改参数文件
主库10.1.8.110
cat /etc/my.cnf
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
datadir=/opt/data
socket=/opt/mysql-5.6.25/mysql.sock
user=mysql
log-error=/opt/mysql-5.6.25/mysql_error.log
pid-file=/opt/data/mysql.pid
server_id =1//主备两台mysql的server_id须不同
log_bin=mysql-bin
binlog_format=mixed
binlog-ignore-db = mysql,information_schema
备库10.1.8.111
cat /etc/my.cnf
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
datadir=/opt/data
socket=/opt/mysql-5.6.25/mysql.sock
user=mysql
log-error=/opt/mysql-5.6.25/mysql_error.log
pid-file=/opt/data/mysql.pid
server_id = 2
log-bin=mysql-bin
binlog_format=mixed
binlog-ignore-db = mysql,information_schema
操作主库10.1.8.110
创建replication用户
CREATE USER 'replication' IDENTIFIED BY'replication';
GRANT REPLICATION SLAVE ON *.* TO 'replication'@'10.1.8.110'IDENTIFIED BY 'replication';
GRANT REPLICATION SLAVE ON *.* TO 'replication'@'10.1.8.111'IDENTIFIED BY 'replication';
GRANT REPLICATION SLAVE ON *.* TO 'replication'@'10.1.8.%'IDENTIFIED BY 'replication';
flush privileges;
mysql> change master tomaster_host='10.1.8.111',master_user='replication',master_password='replication',master_log_file='mysql-bin.000001',master_log_pos=120;
Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.1.8.111
Master_User: replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 120
Relay_Log_File: mysql-relay-bin.000002
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 120
Relay_Log_Space: 456
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 2
Master_UUID: de413f47-b25a-11e7-a336-001631f3d6d4
Master_Info_File:/opt/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for theslave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
1 row in set (0.00 sec)
备机器上执行红色字体是处理问题执行的
mysql> stop slave;
Query OK, 0 rows affected (0.03 sec)
mysql> reset slave all ; 报错时执行初始化化
Query OK, 0 rows affected (0.08 sec)
mysql> reset master; 报错时执行初始化化
Query OK, 0 rows affected (0.09 sec)
mysql> show master status;
+------------------+----------+--------------+--------------------------+-------------------+
| File |Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+--------------------------+-------------------+
| mysql-bin.000001 | 120 | |mysql,information_schema | |
+------------------+----------+--------------+--------------------------+-------------------+
1 row in set (0.00 sec)
mysql> changemaster tomaster_host='10.1.8.110',master_user='replication',master_password='replication',master_log_file='mysql-bin.000001',master_log_pos=120;
Query OK, 0 rows affected, 2 warnings (0.14 sec)
mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.1.8.110
Master_User:replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 120
Relay_Log_File: mysql-relay-bin.000002
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 120
Relay_Log_Space: 456
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: de413f47-b25a-11e7-a336-001631f3d7d4
Master_Info_File: /opt/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State:Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
1 row in set (0.00 sec)
报错内容：“Last_SQL_Errno: 1146
Last_SQL_Error: Error 'Table 'report.hxy' doesn't exist' on query.Default database: 'report'. Query: 'insert into hxy values(01,'zhangsan')'
Replicate_Ignore_Server_Ids: '”，由于从库已经有了一个叫report的数据库，而主库又建立了一个叫report的数据库，由此导致的错误。
修复方式一：
mysql> stop slave;
mysql> set global sql_slave_skip_counter = 1;
mysql> start slave;
create database report DEFAULT CHARSET utf8COLLATE utf8_general_ci;
yum install openssl-devel
安装keepalived
官网http://www.keepalived.org/download.html
wget http://www.keepalived.org/software/keepalived-1.3.8.tar.gz
tar –xf keepalived-1.3.8.tar.gz &&cd keepalived-1.3.8
./configure --prefix=/usr/local/keepalived&& make && make install
或者yum -y install keepalived
配置
安装完成后，进入安装目录的etc目录下，将keepalived相应的配置文件拷贝到系统相应的目录当中。keepalived启动时会从/etc/keepalived目录下查找keepalived.conf配置文件，如果没有找到则使用默认的配置。/etc/keepalived目录安装时默认是没有安装的，需要手动创建。配置文件目录结构如下所示：
[root@namenode01 keepalived-1.3.8]# tree -l/usr/local/keepalived/etc/
/usr/local/keepalived/etc/
├── keepalived
│ ├── keepalived.conf
│ └── samples
│ ├── client.pem
│ ├── dh1024.pem
│ ├── keepalived.conf.fwmark
│ ├── keepalived.conf.HTTP_GET.port
│ ├── keepalived.conf.inhibit
│ ├── keepalived.conf.IPv6
│ ├── keepalived.conf.misc_check
│ ├── keepalived.conf.misc_check_arg
│ ├── keepalived.conf.quorum
│ ├── keepalived.conf.sample
│ ├── keepalived.conf.SMTP_CHECK
│ ├── keepalived.conf.SSL_GET
│ ├── keepalived.conf.status_code
│ ├── keepalived.conf.track_interface
│ ├── keepalived.conf.virtualhost
│ ├── keepalived.conf.virtual_server_group
│ ├── keepalived.conf.vrrp
│ ├── keepalived.conf.vrrp.localcheck
│ ├── keepalived.conf.vrrp.lvs_syncd
│ ├── keepalived.conf.vrrp.routes
│ ├── keepalived.conf.vrrp.rules
│ ├── keepalived.conf.vrrp.scripts
│ ├── keepalived.conf.vrrp.static_ipaddress
│ ├── keepalived.conf.vrrp.sync
│ ├── root.pem
│ ├── sample.misccheck.smbcheck.sh
│ └── sample_notify_fifo.sh
└── sysconfig
└── keepalived
mkdir/etc/keepalived
cp/usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
[[email protected]]# chmod -x/etc/keepalived/mysql.sh
[[email protected]]# cat /etc/keepalived/mysql.sh
#!/bin/bash
MYSQL_OK=1
CHECK_TIME=1
functioncheck_mysql_helth (){
mysql -e "show status;" &>/dev/null
if [ $? = 0 ] ;then
MYSQL_OK=1
else
MYSQL_OK=0
fi
return $MYSQL_OK
}
while [$CHECK_TIME -ne 0 ]
do
let "CHECK_TIME -= 1"
check_mysql_helth
if [ $MYSQL_OK =1 ] ; then
echo "mysql ok\n"
CHECK_TIME=0
exit 0
fi
if [ $MYSQL_OK-eq 0 ] && [ $CHECK_TIME -eq 0]
then
pkill keepalived
exit 1
fi
sleep 1
done
[root@namenode02~]# cat /etc/keepalived/keepalived.conf
! ConfigurationFile for keepalived
global_defs {
router_id namenode02 #主机名
}
vrrp_instanceVI_1 {
state BACKUP #两台都设置BACKUP
interface enp5s0f0 //网卡接口用ifconfig查看
virtual_router_id 51 #主备相同
priority 90 #优先级，master设置100
advert_int 1
# nopreempt #不主动抢占资源，只在master这台优先级高的设置，backup不设置
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.1.8.113
}
}
virtual_server10.1.8.113 3306 {
delay_loop 2
lb_algo wrr
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 10.1.8.111 3306 {
weight 3
notify_down /etc/keepalived/mysql.sh
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
[root@datanode10~]# cat /etc/keepalived/keepalived.conf
! ConfigurationFile for keepalived
global_defs {
router_id datanode10
}
vrrp_instanceVI_1 {
state BACKUP
interface ens4f0
virtual_router_id 51
priority 100
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.1.8.113
}
}
virtual_server10.1.8.113 3306 {
delay_loop 2
lb_algo wrr
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 10.1.8.110 3306 {
weight 3
notify_down /etc/keepalived/mysql.sh
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
测试，停掉一台机器的keepalive进程，看vip10.1.8.113是否能自动漂移
若可以怎没有问题