Keepalive实现mysql双主热备
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Keepalive实现mysql双主热备
环境描述：
OS: CentoOS6.6_X64
Node1:172.16.10.1
Node2:172.16.10.2
VIP:172.16.10.10
1、配置主机互信
Node1:
[[email protected]~]# ifconfig eth0 eth0 Link encap:Ethernet HWaddr 00:0C:29:11:21:56 inet addr:172.16.100.1 Bcast:172.16.100.255 Mask:255.255.255.0 inet6 addr:fe80::20c:29ff:fe11:2156/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:144 errors:0 dropped:0overruns:0 frame:0 TX packets:114 errors:0 dropped:0overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:14467 (14.1 KiB) TX bytes:11961 (11.6 KiB)
[[email protected]~]# ntpdate 172.16.100.30 25 Jul11:34:52 ntpdate[2123]: step time server 172.16.100.30 offset -28852.934223 sec
[[email protected]~]# crontab -e 15 5 * ** /usr/bin/crontab 172.16.100.30
[[email protected]~]# hostname node1.Smoke.com
[[email protected]~]# hostname node1.Smoke.com
[[email protected]~]# vim /etc/sysconfig/network NETWORKING=yes HOSTNAME=node1.Smoke.com
[[email protected]~]# uname -n node1.Smoke.com
[[email protected]~]# vim /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4localhost4.localdomain4 ::1 localhost localhost.localdomainlocalhost6 localhost6.localdomain6 172.16.100.1 node1.Smoke.com node1 172.16.100.2 node2.Smoke.com node2
[[email protected]~]# ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ‘‘ Generatingpublic/private rsa key pair. Createddirectory ‘/root/.ssh‘. Youridentification has been saved in /root/.ssh/id_rsa. Yourpublic key has been saved in /root/.ssh/id_rsa.pub. The keyfingerprint is: 4c:9e:47:8a:a1:ee:d3:64:d5:e0:ab:21:fd:e6:43:[email protected] Thekey‘s randomart image is: +--[ RSA2048]----+ | | | . | | ...o. | | . *E+. | | ....S+. | | .. = +. | | .= = | | .. o + | | .. o.. | +-----------------+
[[email protected]~]# ssh-copy-id -i .ssh/id_rsa.pub [email protected] Theauthenticity of host ‘172.16.100.2 (172.16.100.2)‘ can‘t be established. RSA key fingerprintis cc:c3:c7:45:9e:40:60:dd:03:13:b3:37:9a:ff:0e:8a. Are yousure you want to continue connecting (yes/no)? yes Warning:Permanently added ‘172.16.100.2‘ (RSA) to the list of known hosts. [email protected]‘spassword: Now trylogging into the machine, with "ssh ‘[email protected]‘", and checkin: .ssh/authorized_keys to makesure we haven‘t added extra keys that you weren‘t expecting.
Node2:
[[email protected]~]# ifconfig eth0 eth0 Link encap:Ethernet HWaddr 00:0C:29:E8:20:12 inet addr:172.16.100.2 Bcast:172.16.100.255 Mask:255.255.255.0 inet6 addr:fe80::20c:29ff:fee8:2012/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:589 errors:0 dropped:0overruns:0 frame:0 TX packets:782 errors:0 dropped:0 overruns:0carrier:0 collisions:0 txqueuelen:1000 RX bytes:45720 (44.6 KiB) TX bytes:175486 (171.3 KiB)
[[email protected]~]# ntpdate 172.16.100.30 25 Jul11:46:17 ntpdate[2216]: step time server 172.16.100.30 offset -28853.089885 sec
[[email protected]~]# crontab -e 15 5 * ** /usr/bin/crontab 172.16.100.30
[[email protected]~]# hostname node2.Smoke.com
[[email protected]~]# hostname node2.Smoke.com
[[email protected]~]# vim /etc/sysconfig/network NETWORKING=yes HOSTNAME=node2.Smoke.com
[[email protected]~]# uname -n node2.Smoke.com
[[email protected]~]# vim /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4localhost4.localdomain4 ::1 localhost localhost.localdomainlocalhost6 localhost6.localdomain6 172.16.100.1 node1.Smoke.com node1 172.16.100.2 node2.Smoke.com node2
[[email protected]~]# ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ‘‘ Generatingpublic/private rsa key pair. Youridentification has been saved in /root/.ssh/id_rsa. Yourpublic key has been saved in /root/.ssh/id_rsa.pub. The keyfingerprint is: 51:55:ee:dd:5b:f7:b9:b1:f7:0e:de:b9:34:55:85:[email protected] Thekey‘s randomart image is: +--[ RSA2048]----+ | ..Eooo.| | . .. .| | . . .| | . . .o| | S . *| | B| | .*.| | ..oB| | .*B| +-----------------+
[[email protected]~]# ssh-copy-id -i .ssh/id_rsa.pub [email protected] Theauthenticity of host ‘172.16.100.1 (172.16.100.1)‘ can‘t be established. RSA keyfingerprint is 85:d3:16:71:c5:c5:d6:dd:dd:93:53:10:a9:63:4d:ca. Are yousure you want to continue connecting (yes/no)? yes Warning:Permanently added ‘172.16.100.1‘ (RSA) to the list of known hosts. [email protected]‘spassword: Now trylogging into the machine, with "ssh ‘[email protected]‘", and checkin: .ssh/authorized_keys to makesure we haven‘t added extra keys that you weren‘t expecting.
2、安装mysql-server，我这里使用mysql-5.6.12-linux-glibc2.5-x86_64.tar.gz二进制文件安装，请最好使用高于5.6版本的mysql，因为支持server-id；
Node1:
[[email protected]~]# ls anaconda-ks.cfg install.log install.log.syslog mysql-5.6.12-linux-glibc2.5-x86_64.tar.gz
[[email protected]~]# mkdir -pv /mydata/data mkdir: 已创建目录 "/mydata" mkdir: 已创建目录 "/mydata/data"
[[email protected]~]# groupadd -r -g 306 mysql
[[email protected]~]# useradd -g 306 -r -u 306 mysql
[[email protected]~]# chown -R mysql.mysql /mydata/data/
[[email protected]~]# tar xf mysql-5.6.12-linux-glibc2.5-x86_64.tar.gz -C /usr/local/
[[email protected]~]# cd /usr/local/
[[email protected]]# ls bin etc games include lib lib64 libexec mysql-5.6.12-linux-glibc2.5-x86_64 sbin share src
[[email protected]]# ln -sv mysql-5.6.12-linux-glibc2.5-x86_64 mysql "mysql"-> "mysql-5.6.12-linux-glibc2.5-x86_64"
[[email protected]]# cd mysql
[[email protected]]# ll 总用量 76 drwxr-xr-x. 2 root root 4096 7月 25 12:03 bin -rw-r--r--. 1 7161 wheel 17987 1月 23 2013 COPYING drwxr-xr-x. 4 root root 4096 7月 25 12:03 data drwxr-xr-x. 2 root root 4096 7月 25 12:03 docs drwxr-xr-x. 3 root root 4096 7月 25 12:03 include -rw-r--r--. 1 7161 wheel 7468 1月 23 2013 INSTALL-BINARY drwxr-xr-x. 3 root root 4096 7月 25 12:03 lib drwxr-xr-x. 4 root root 4096 7月 25 12:03 man drwxr-xr-x.10 root root 4096 7月 25 12:03 mysql-test -rw-r--r--. 1 7161 wheel 2552 1月 23 2013 README drwxr-xr-x. 2 root root 4096 7月 25 12:03 scripts drwxr-xr-x.28 root root 4096 7月 25 12:03 share drwxr-xr-x. 4 root root 4096 7月 25 12:03 sql-bench drwxr-xr-x. 3 root root 4096 7月 25 12:03 support-files
[[email protected]]# chown -R root.mysql ./*
[[email protected]]# ll 总用量 76 drwxr-xr-x. 2 root mysql 4096 7月 25 12:03 bin -rw-r--r--. 1 root mysql 17987 1月 23 2013 COPYING drwxr-xr-x. 4 root mysql 4096 7月 25 12:03 data drwxr-xr-x. 2 root mysql 4096 7月 25 12:03 docs drwxr-xr-x. 3 root mysql 4096 7月 25 12:03 include -rw-r--r--. 1 root mysql 7468 1月 23 2013 INSTALL-BINARY drwxr-xr-x. 3 root mysql 4096 7月 25 12:03 lib drwxr-xr-x. 4 root mysql 4096 7月 25 12:03 man drwxr-xr-x.10 root mysql 4096 7月 25 12:03 mysql-test -rw-r--r--. 1 root mysql 2552 1月 23 2013 README drwxr-xr-x. 2 root mysql 4096 7月 25 12:03 scripts drwxr-xr-x.28 root mysql 4096 7月 25 12:03 share drwxr-xr-x. 4 root mysql 4096 7月 25 12:03 sql-bench drwxr-xr-x. 3 root mysql 4096 7月 2512:03 support-files
[[email protected]]# scripts/mysql_install_db--user=mysql --datadir=/mydata/data
[[email protected]]# cp support-files/mysql.server /etc/init.d/mysqld
[[email protected]]# chkconfig --add mysqld
[[email protected]]# vim my.cnf datadir =/mydata/data innodb_file_per_table= ON server-id= 1 socket =/tmp/mysql.sock log-bin= mysql-bin
[[email protected]]# netstat -tnlp ActiveInternet connections (only servers) ProtoRecv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 2346/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1026/master tcp 0 0 127.0.0.1:6011 0.0.0.0:* LISTEN 2275/sshd tcp 0 0 :::22 :::* LISTEN 2346/sshd tcp 0 0 ::1:25 :::* LISTEN 1026/master tcp 0 0 ::1:6011 :::* LISTEN 2275/sshd tcp 0 0 :::3306 :::* LISTEN 12146/mysqld
[[email protected]]# vim /etc/profile.d/mysql.sh exportPATH=$PATH:/usr/local/mysql/bin
[[email protected]]# . /etc/profile.d/mysql.sh
[[email protected]]# mysqladmin -u root password smoke520
[[email protected]]# vim my.cnf sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES datadir= /mydata/data innodb_file_per_table= ON server-id= 1 socket =/tmp/mysql.sock log-bin= mysql-bin log-error= /mydata/data/node1.Smoke.com.error.log skip-slave-start= 1 auto_increment_offset= 2 auto_increment_increment= 10
[[email protected]]# service mysqld restart Shuttingdown MySQL.. SUCCESS! StartingMySQL. SUCCESS!
Node2:
[[email protected]~]# ls anaconda-ks.cfg install.log install.log.syslog mysql-5.6.12-linux-glibc2.5-x86_64.tar.gz
[[email protected]~]# mkdir -pv /mydata/data mkdir: 已创建目录 "/mydata" mkdir: 已创建目录 "/mydata/data"
[[email protected]~]# groupadd -r -g 306 mysql
[[email protected]~]# useradd -g 306 -r -u 306 mysql
[[email protected]~]# chown -R mysql.mysql /mydata/data/
[[email protected]~]# tar xf mysql-5.6.12-linux-glibc2.5-x86_64.tar.gz -C /usr/local/
[[email protected]~]# cd /usr/local/
[[email protected]]# ln -sv mysql-5.6.12-linux-glibc2.5-x86_64 mysql "mysql"-> "mysql-5.6.12-linux-glibc2.5-x86_64"
[[email protected]]# cd mysql
[[email protected]]# chown -R root.mysql ./*
[[email protected]]# scripts/mysql_install_db --user=mysql --datadir=/mydata/data
[[email protected]]# cp support-files/mysql.server /etc/init.d/mysqld
[[email protected]]# chkconfig --add mysqld
[[email protected]]# vim my.cnf sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES datadir= /mydata/data innodb_file_per_table= ON server-id= 2 socket =/tmp/mysql.sock log-bin= mysql-bin log-error= /mydata/data/node2.Smoke.com.error.log skip-slave-start= 1 auto_increment_offset= 2 auto_increment_increment= 10
[[email protected]]# service mysqld start StartingMySQL.. SUCCESS!
[[email protected]]# vim /etc/profile.d/mysql.sh exportPATH=$PATH:/usr/local/mysql/bin
[[email protected]]# . /etc/profile.d/mysql.sh
[[email protected]]# mysqladmin -u root password smoke520
Node1:
[[email protected]]# mysql -u root -psmoke520 Warning:Using a password on the command line interface can be insecure. Welcometo the MySQL monitor. Commands end with; or \g. YourMySQL connection id is 2 Serverversion: 5.6.12-log MySQL Community Server (GPL) Copyright(c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracleis a registered trademark of Oracle Corporation and/or its affiliates.Other names may be trademarks of their respective owners. Type‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql>SHOW MASTER STATUS; +------------------+----------+--------------+------------------+-------------------+ |File | Position |Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ |mysql-bin.000004 | 425 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row inset (0.00 sec) mysql>GRANT REPLICATION SLAVE ON *.* TO‘replication‘@‘172.16.100.%‘ IDENTIFIED BY ‘replication‘; QueryOK, 0 rows affected (0.00 sec) mysql>FLUSH PRIVILEGES; QueryOK, 0 rows affected (0.00 sec) CHANGEMASTER TO master_host=‘172.16.100.2‘, master_user=‘replication‘, master_password=‘replication‘, master_log_file=‘mysql-bin.000001‘, master_log_pos=572; QueryOK, 0 rows affected, 2 warnings (0.08 sec) mysql>START SLAVE; QueryOK, 0 rows affected (0.04 sec)
Node2:
[[email protected]]# mysql -u root -psmoke520 Warning:Using a password on the command line interface can be insecure. Welcometo the MySQL monitor. Commands end with; or \g. YourMySQL connection id is 3 Serverversion: 5.6.12-log MySQL Community Server (GPL) Copyright(c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracleis a registered trademark of Oracle Corporation and/or its affiliates.Other names may be trademarks of their respective owners. Type‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql>SHOW MASTER STATUS; +------------------+----------+--------------+------------------+-------------------+ |File | Position |Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ |mysql-bin.000001 | 572 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row inset (0.00 sec) mysql>GRANT REPLICATION SLAVE ON *.* TO ‘replication‘@‘172.16.100.%‘ IDENTIFIED BY‘replication‘; QueryOK, 0 rows affected (0.01 sec) mysql>FLUSH PRIVILEGES; QueryOK, 0 rows affected (0.00 sec) mysql>CHANGE MASTER TO -> master_host=‘172.16.100.1‘, -> master_user=‘replication‘, -> master_password=‘replication‘, -> master_log_file=‘mysql-bin.000004‘, -> master_log_pos=425; QueryOK, 0 rows affected, 2 warnings (0.08 sec) mysql>START SLAVE; QueryOK, 0 rows affected (0.01 sec)
Node1:
mysql>SHOW SLAVE STATUS\G ***************************1. row *************************** Slave_IO_State: Waiting formaster to send event Master_Host: 172.16.100.2 Master_User: replication Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000001 Read_Master_Log_Pos: 572 Relay_Log_File:node1-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: 572 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:2aeb7f76-5245-11e6-ab53-000c29e82012 Master_Info_File:/mydata/data/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has readall 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 inset (0.00 sec)
Node2:
mysql>SHOW SLAVE STATUS\G ***************************1. row *************************** Slave_IO_State: Waiting formaster to send event Master_Host: 172.16.100.1 Master_User: replication Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000004 Read_Master_Log_Pos: 425 Relay_Log_File:node2-relay-bin.000002 Relay_Log_Pos: 283 Relay_Master_Log_File: mysql-bin.000004 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: 425 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:77c4f525-5240-11e6-ab35-000c29112156 Master_Info_File:/mydata/data/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has readall 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 inset (0.00 sec)
Node1:
mysql>USE test; Databasechanged mysql>SHOW TABLES; Emptyset (0.00 sec) mysql>CREATE TABLE user(number INT(10),name VARCHAR(255)); QueryOK, 0 rows affected (0.12 sec) mysql>INSERT INTO user VALUES(01,‘zhangsan‘); QueryOK, 1 row affected (0.01 sec) mysql>SHOW TABLES; +----------------+ |Tables_in_test | +----------------+ |user | +----------------+ 1 row inset (0.00 sec)
Node2:
mysql>USE test; Databasechanged mysql>SHOW TABLES; +----------------+ |Tables_in_test | +----------------+ |user | +----------------+ 1 row inset (0.00 sec) mysql>SELECT number,name FROM user; +--------+----------+ | number| name | +--------+----------+ | 1 | zhangsan | +--------+----------+ 1 row inset (0.00 sec)
3、安装keep-alive；
我这里使用keep-alive版本为keepalived-1.2.7.tar；
[[email protected]~]# ls anaconda-ks.cfg install.log install.log.syslog keepalived-1.2.7.tar.gz mysql-5.6.12-linux-glibc2.5-x86_64.tar.gz
[[email protected]~]# yum install -y pcre-devel openssl-devel popt-devel
[[email protected]~]# tar xf keepalived-1.2.7.tar.gz
[[email protected]~]# cd keepalived-1.2.7
[[email protected]]# ./configure --prefix=/usr/local/keepalived
[[email protected]]# make && make install
[[email protected]]# cp /usr/local/keepalived /etc/rc.d/init.d/keepalived/etc/init.d/
[[email protected]]# cp /usr/local/keepalived /etc/sysconfig/keepalived/etc/sysconfig/
[[email protected]]# mkdir /etc/keepalived/
[[email protected]]# cp /usr/local/keepalived /etc/keepalived/keepalived.conf/etc/keepalived/
[[email protected]]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
[[email protected]]# vim /etc/keepalived/keepalived.conf !Configuration File for keepalived global_defs{ notification_email { [email protected] } notification_email_from [email protected] smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id MYSQL_HA } vrrp_instanceVI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 100 advert_int 1 nopreempt authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.16.100.10 } } virtual_server172.16.100.10 3306 { delay_loop 2 #lb_algo rr #lb_kind NAT #nat_mask 255.255.255.0 persistence_timeout 50 protocol TCP real_server 172.16.100.1 3306 { weight 3 notify_down/usr/local/keepalived/mysql.sh TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } }
[[email protected]]# vim /usr/local/keepalived/mysql.sh #!/bin/bash pkillkeepalived
[[email protected]]# chmod +x /usr/local/keepalived/mysql.sh
Node2:
[[email protected]~]# ls anaconda-ks.cfg install.log install.log.syslog keepalived-1.2.7.tar.gz mysql-5.6.12-linux-glibc2.5-x86_64.tar.gz
[[email protected]~]# yum install -y pcre-devel openssl-devel popt-devel
[[email protected]~]# tar xf keepalived-1.2.7.tar.gz
[[email protected]~]# cd keepalived-1.2.7
[[email protected]]# ./configure --prefix=/usr/local/keepalived
[[email protected]]# make && make install
[[email protected]epalived-1.2.7]# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived/etc/init.d/
[[email protected]]# cp /usr/local/keepalived /etc/sysconfig/keepalived/etc/sysconfig/
[[email protected]]# mkdir /etc/keepalived/
[[email protected]]# cp /usr/local/keepalived /etc/keepalived/keepalived.conf/etc/keepalived/
[[email protected]]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
[[email protected]]# scp [email protected]:/etc/keepalived/keepalived.conf /etc/keepalived/ Theauthenticity of host ‘node1 (172.16.100.1)‘ can‘t be established. RSA keyfingerprint is 85:d3:16:71:c5:c5:d6:dd:dd:93:53:10:a9:63:4d:ca. Are yousure you want to continue connecting (yes/no)? yes Warning:Permanently added ‘node1‘ (RSA) to the list of known hosts. keepalived.conf 100% 806 0.8KB/s 00:00
[[email protected]]# vim /etc/keepalived/keepalived.conf !Configuration File for keepalived global_defs{ notification_email { [email protected] } notification_email_from [email protected] smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id MYSQL_HA } vrrp_instanceVI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 90 advert_int 1 nopreempt authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.16.100.10 } } virtual_server172.16.100.10 3306 { delay_loop 2 #lb_algo rr #lb_kind NAT #nat_mask 255.255.255.0 persistence_timeout 50 protocol TCP real_server 172.16.100.2 3306 { weight 3 notify_down/usr/local/keepalived/mysql.sh TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } }
[[email protected]]# vim /usr/local/keepalived/mysql.sh #!/bin/bash pkillkeepalived
[[email protected]]# chmod +x /usr/local/keepalived/mysql.sh
Node1:
[[email protected]]# /etc/init.d/keepalived start 正在启动keepalived： [确定]
[[email protected]]# mysql -uroot -psmoke520 Warning:Using a password on the command line interface can be insecure. Welcometo the MySQL monitor. Commands end with; or \g. YourMySQL connection id is 17 Serverversion: 5.6.12-log MySQL Community Server (GPL) Copyright(c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracleis a registered trademark of Oracle Corporation and/or its affiliates.Other names may be trademarks of their respective owners. Type‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql>GRANT ALL ON *.* to ‘root‘@‘172.16.100.%‘ identified by ‘smoke520‘; QueryOK, 0 rows affected (0.03 sec) mysql>FLUSH PRIVILEGES; QueryOK, 0 rows affected (0.02 sec)
Node2:
[[email protected]]# /etc/init.d/keepalived start 正在启动keepalived： [确定]
[[email protected]]# mysql -uroot -psmoke520 Warning:Using a password on the command line interface can be insecure. Welcometo the MySQL monitor. Commands end with; or \g. YourMySQL connection id is 18 Serverversion: 5.6.12-log MySQL Community Server (GPL) Copyright(c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracleis a registered trademark of Oracle Corporation and/or its affiliates.Other names may be trademarks of their respective owners. Type‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql>GRANT ALL ON *.* TO ‘root‘@‘172.16.100.%‘ identified by ‘smoke520‘; QueryOK, 0 rows affected (0.00 sec)
4、测试：
开机一台mysql-client访问172.16.100.10；
[[email protected]~]# mysql -uroot -psmoke520 -h172.16.100.10 Welcometo the MySQL monitor. Commands end with; or \g. YourMySQL connection id is 292 Serverversion: 5.6.12-log MySQL Community Server (GPL) Copyright(c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracleis a registered trademark of Oracle Corporation and/or its affiliates.Other names may be trademarks of their respective owners. Type‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql>SHOW VARIABLES LIKE ‘server_id‘; +---------------+-------+ |Variable_name | Value | +---------------+-------+ |server_id | 1 | +---------------+-------+ 1 row inset (0.01 sec) mysql>SHOW DATABASES; +--------------------+ |Database | +--------------------+ |information_schema | |mysql | |performance_schema | |test | +--------------------+ 4 rowsin set (0.01 sec) mysql>USE test; Readingtable information for completion of table and column names You canturn off this feature to get a quicker startup with -A Databasechanged mysql>SHOW TABLES; +----------------+ |Tables_in_test | +----------------+ |user | +----------------+ 1 row inset (0.01 sec) mysql>SELECT * FROM user; +--------+----------+ | number| name | +--------+----------+ | 1 | zhangsan | +--------+----------+ 1 row inset (0.01 sec) mysql>\q Bye
查看node1主机相关信息；
[[email protected]~]# ip address show 1: lo:<LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen1000 link/ether 00:0c:29:11:21:56 brdff:ff:ff:ff:ff:ff inet 172.16.100.1/24 brd 172.16.100.255scope global eth0 inet 172.16.100.10/32 scope global eth0 inet6 fe80::20c:29ff:fe11:2156/64 scopelink valid_lft forever preferred_lft forever 3: eth1:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen1000 link/ether 00:0c:29:11:21:60 brdff:ff:ff:ff:ff:ff inet 192.168.111.137/24 brd 192.168.111.255scope global eth1 inet6 fe80::20c:29ff:fe11:2160/64 scopelink valid_lft forever preferred_lft forever
[[email protected]~]# tail /var/log/messages Jul 2520:06:06 node1 kernel: IPVS: Scheduler module ip_vs_ not found Jul 2520:12:14 node1 Keepalived_vrrp[17720]: VRRP_Instance(VI_1) Transition to MASTERSTATE Jul 2520:12:15 node1 Keepalived_vrrp[17720]: VRRP_Instance(VI_1) Entering MASTERSTATE Jul 2520:12:15 node1 Keepalived_vrrp[17720]: VRRP_Instance(VI_1) setting protocolVIPs. Jul 2520:12:15 node1 Keepalived_vrrp[17720]: VRRP_Instance(VI_1) Sending gratuitousARPs on eth0 for 172.16.100.10 Jul 2520:12:15 node1 Keepalived_healthcheckers[17719]: Netlink reflector reports IP172.16.100.10 added Jul 2520:12:20 node1 Keepalived_vrrp[17720]: VRRP_Instance(VI_1) Sending gratuitousARPs on eth0 for 172.16.100.10 Jul 2520:12:44 node1 dhclient[2001]: DHCPREQUEST on eth1 to 192.168.111.254 port 67(xid=0x765dffe3) Jul 2520:12:44 node1 dhclient[2001]: DHCPACK from 192.168.111.254 (xid=0x765dffe3) Jul 2520:12:46 node1 dhclient[2001]: bound to 192.168.111.137 -- renewal in 778seconds.
关闭node1主机上的mysql服务器：
[[email protected]~]# service mysqld stop Shuttingdown MySQL.. SUCCESS!
[[email protected]~]# ps aux | grep keep root 17783 0.0 0.0 103260 872 pts/0 S+ 20:19 0:00 grep keep [[email protected]~]# tail /var/log/messages Jul 2520:18:52 node1 Keepalived_healthcheckers[17719]: TCP connection to[172.16.100.1]:3306 failed !!! Jul 2520:18:52 node1 Keepalived_healthcheckers[17719]: Removing service[172.16.100.1]:3306 from VS [172.16.100.10]:3306 Jul 2520:18:52 node1 Keepalived_healthcheckers[17719]: IPVS: Service not defined Jul 2520:18:52 node1 Keepalived_healthcheckers[17719]: Executing[/usr/local/keepalived/mysql.sh] for service [172.16.100.1]:3306 in VS[172.16.100.10]:3306 Jul 2520:18:52 node1 Keepalived_healthcheckers[17719]: Lost quorum 1-0=1 > 0 forVS [172.16.100.10]:3306 Jul 2520:18:52 node1 Keepalived_healthcheckers[17719]: Remote SMTP server[127.0.0.1]:25 connected. Jul 2520:18:52 node1 Keepalived[17717]: Stopping Keepalived v1.2.7 (07/25,2016) Jul 2520:18:52 node1 Keepalived_vrrp[17720]: VRRP_Instance(VI_1) sending 0 priority Jul 2520:18:52 node1 Keepalived_healthcheckers[17719]: IPVS: No such service Jul 2520:18:52 node1 Keepalived_vrrp[17720]: VRRP_Instance(VI_1) removing protocolVIPs.
通过mysql-client继续访问172.16.100.10；
[[email protected]~]# mysql -uroot -psmoke520 -h172.16.100.10 ERROR2003 (HY000): Can‘t connect to MySQL server on ‘172.16.100.10‘ (113) [[email protected]~]# mysql -uroot -psmoke520 -h172.16.100.10 Welcometo the MySQL monitor. Commands end with; or \g. YourMySQL connection id is 4 Serverversion: 5.6.12-log MySQL Community Server (GPL) Copyright(c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracleis a registered trademark of Oracle Corporation and/or its affiliates.Other names may be trademarks of their respective owners. Type‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql>SHOW VARIABLES LIKE ‘server_id‘; +---------------+-------+ | Variable_name| Value | +---------------+-------+ |server_id | 2 | +---------------+-------+ 1 row inset (0.01 sec) mysql>USE test; Readingtable information for completion of table and column names You canturn off this feature to get a quicker startup with -A Databasechanged mysql>SHOW TABLES; +----------------+ |Tables_in_test | +----------------+ |user | +----------------+ 1 row inset (0.01 sec) mysql>SELECT * FROM user; +--------+----------+ | number| name | +--------+----------+ | 1 | zhangsan | +--------+----------+ 1 row inset (0.01 sec) mysql>\q Bye
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