016-MHA Mode configuration

Description: MHA (Master high availability), the current MySQL in the more common solution. Tools:

MASTERHA_CHECK_SSH Check MHA SSH configuration status masterha_check_repl check MySQL replication status Masterha_manger boot MHA masterha_check_status Detects the current MHA run status Masterha_master_monitor detects master for downtime Masterha_master_switch control failover (automatic or manual) Masterha_conf_host To add or remove configured server information
Environment configuration:

Ip	Role	Describe mysql5.7 version
192.168.68.129	Master (Master)	Node_master node
192.168.68.130	Slave (from + standby master)	Node_bakup_master Standby
192.168.68.131	Slave (from)	Node
192.168.68.132	Slave+manager (from + management)	Node + Management Machine
192.168.68.110	Shared IP, no machine

One or one main three configuration from: (Ignore process) Note:

To disable Gtid mode in #1, MY.CNF, the 5.7 version disables Gtid mode by default, and if non-5.7 versions need to be added in [mysqld]
Gtid_mode=0 #2, 4 MySQL server_id can not be the same
Servicer_id=1, 2, 3, 4 #3, auto.cnf server-uuid 4 MySQL can not be the same [Root@slave tmp]# cd/usr/local/mysql/data/[root@slave data] # cat auto.cnf [Auto] server-uuid=8c1ea0b7-5be8-11e7-93a7-000c292ef002 [Root@slave data]# II, add MHA user name and password to be replicated:

# # all_db need to execute: Grant all privileges on *.* to ' mha_manager ' @ '% ' identified by ' 123456 '; Grant replication slave on *.* to ' repl ' @ '% ' identified by ' 123456 '; Flush privileges; # # If there is a slave running manager above this computer: This is 192.168.68.132 using MANAGERDB representatives: GRANT all privileges on *.* to ' Mha_manager ' @ ' Manag Er.100 ' identified by ' 123456 '
(manager.100) is a local name, uname-a can check to see
Third, Ssh-keygen to establish a secret trust

# # 192.168.68.129 Ssh-keygen # #猛砸回车 CD ~/.ssh/ls | The grep Id_rsa appears as follows:

# # 192.168.68.129 Copy id_rsa.pub key, and Key+ip file CP id_rsa.pub key129 # to distribute the generated KEY+IP files to the machines above the SCP key129 192.168.68.130:~/. SSH/SCP key129 192.168.68.131:~/.SSH/SCP key129 192.168.68.132:~/.ssh/# 130, 131, 132 repeat the final results of the work as follows:

# 129, 130, 131, 132 repeat the following operation Cat key129 key130 key131 key132 > Authorized_keys # After the end, in each machine access to other three machines, SSH 192.168.68.xx # # No-secret login is correct four, download the RPM package: and copied to the all_db

mha4mysql-node-0.56-0.el6.noarch.rpm mha4mysql-manager-0.56-0.el6.noarch.rpm # #如何下载请自行百度 v. Installation of mha4mysql-node-0.56- 0.el6.noarch. The RPM package is on all the machines all_db

Six, manager: namely 192.168.68.132 above operation content is as follows: Installs Mha4mysql-manager-0.56-0.el6.noarch. RPM Package

Yum Install cpan yum install perl-config-tiny yum install perl-time-hires yum install-y rrdtool perl-rrdtool RRDtool -devel Perl-params-validate # # can not use Yum source of your own Baidu, very simple

wget http://downloads.naulinux.ru/pub/NauLinux/6x/i386/sites/School/RPMS/ perl-log-dispatch-2.27-1.el6.noarch.rpm wget http://dl. fedoraproject.org/pub/epel/6/i386/perl-parallel-forkmanager-0.7.9-1.el6.noarch.rpm wget http:// dl.fedoraproject.org/pub/epel/6/i386/perl-mail-sender-0.8.16-3.el6.noarch.rpm wget http://dl.fedoraproject.org/ pub/epel/6/i386/perl-mail-sendmail-0.79-12.el6.noarch.rpm

RPM-IVH perl-mail-sender-0.8.16-1.el6.rf.noarch.rpm RPM-IVH perl-mail-sendmail-0.79-1.2.el6.rf.noarch.rpm Yum Localinstall perl-log-dispatch-2.26-1.el6.rf.noarch.rpm Yum Localinstall perl-parallel-forkmanager-0.7.5-2.2.el6.rf.noarch.rpm

RPM-IVH mha4mysql-manager-0.53-0.el6.noarch.rpm

Vii. establishment of MHA required directory and file manager_db operation:

# # MANAGER-DB Operation
Shell> Mkdir/etc/masterha--Creating a folder shell> vim/etc/masterha/app1.cnf--Creating a new configuration file section

# # APP1.CNF Configure MANAGER-DB to operate [server default] Manager_log=/var/log/mha/app1/manager.log manager_workdir=/var/log/ Mha/app1 master_binlog_dir=/usr/local/mysql/data Remote_workdir=/var/log/mha/app1 User=mha_manager password=123456 Repl_user=repl repl_password=123456 ssh_user=root ping_interval=1 secondary_check_script= "Masterha_secondary_check -S 192.168.68.129-s 192.168.68.130 "master_ip_failover_script="/tmp/master_ip_failover.sh "[Server1] Hostname= 192.168.68.129 #可以升为master candidate_master=1 [server2] hostname=192.168.68.130 candidate_master=1 check_repl_delay= 0 [Server3] hostname=192.168.68.131 no_master=1 [server4] hostname=192.168.68.132 no_master=1

### all DB above establish the Software connection note all-db All machines need to operate ln-s/usr/local/mysql/bin/mysql/usr/local/bin/mysql ln-s/usr/local/mysql/bin/ Mysqlbinlog/usr/local/bin/mysqlbinlog ln-s/usr/local/mysql/bin/mysqlbinlog/usr/bin/mysqlbinlog ln-s/usr/local/ Mysql/bin/mysql/usr/bin