Shulou(Shulou.com)06/01 Report--

This article mainly describes the highly available rapid deployment steps of MHA and the simple use of commands

1. Download the installation package

Mha dependency package: http://rpm.pbone.net/index.php3

Perl-DBD-MySQL

Perl-Config-Tiny

Perl-Log-Dispatch

Perl-Parallel-ForkManager

Perl-Config-IniFiles

Perl-MailTools

Perl-Params-Validate

Perl-TimeDate

Perl-IO-stringy

Cmake-2.8.12.2.tar.gz http://www.linuxfromscratch.org/blfs/view/7.5/general/cmake.html

DBD-mysql-4.033_02.tar.gz http://www.filewatcher.com/d/FreeBSD/distfiles/Other/DBD-mysql-4.018.tar.gz.133427.html

DBI-1.636.tar.gz http://www.cpan.org/modules/by-module/DBI/

Mha rpm package installation: https://code.google.com/p/mysql-master-ha/

Mha4mysql-manager-0.56-0.el6.noarch.rpm

Mha4mysql-node-0.56-0.el6.noarch.rpm

Mha source code installation: https://code.google.com/p/mysql-master-ha/

Mha4mysql-node-0.56.tar.gz

Mha4mysql-manager-0.56.tar.gz

MySQL installation package:

Percona-server-5.6.32-78.0.tar.gz https://www.percona.com/downloads/Percona-Server-5.6/LATEST/

2. Extract the installation package

For i in `ls`; do tar-xzvf $I; tar-xvf $I; done

3. Install the dependency package

Configure the local yum source:

[root@node3 MHA] # mkdir / media/cdrom

[root@node3 MHA] # mount CentOS-6.4-x86_64-bin-DVD1.iso / media/cdrom/-o loop

[root@node3 MHA] # rm-rf / etc/yum.repos.d/*.repo

[root@node3 MHA] # vi / etc/yum.repos.d/CentOS6.repo

[Base]

Name=CentOS6 ISO Base

Baseurl= file:///media/cdrom

Enabled=1

Gpgcheck=0

Dependent package check installation:

Yum install-y git scons gcc gathers + gcc-c++ openssl check cmake bison libaio libboost-all-dev libasio-dev libaio-dev libncurses5-dev libreadline-dev libpam-dev ncurses-devel

Yum-y install gcc gcc-c++ gcc-g77 autoconf automake zlib* fiex* libxml* ncurses-devel libmcrypt* libtool-ltdl-devel* make cmake

Rpm-q git scons gcc gathers + gcc-c++ openssl check cmake bison libaio libboost-all-dev libasio-dev libaio-dev libncurses5-dev libreadline-dev libpam-dev ncurses-devel

Cmake installation:

[root@node3 MHA] # cd cmake-2.8.12.2

[root@node3 cmake-2.8.12.2] #. / bootstrap

[root@node3 cmake-2.8.12.2] # make- j 8

[root@node3 cmake-2.8.12.2] # make install

Perl tool installation

[root@node3 MHA] # rpm-ivh perl-Parallel-ForkManager-0.7.9-1.el6.noarch.rpm

[root@node3 MHA] # rpm-ivh perl-Config-Tiny-2.12-7.1.el6.noarch.rpm

[root@node3 MHA] # rpm-ivh perl-Params-Validate-0.95-5.9.x86_64.rpm

[root@node3 MHA] # rpm-ivh perl-TimeDate-2.22-1.noarch.rpm

[root@node3 MHA] # rpm-ivh perl-MailTools-2.04-4.el6.noarch.rpm (not required)

[root@node3 MHA] # rpm-ivh perl-Convert-BinHex-1.119-4.el6.noarch.rpm-- nodeps (not required)

[root@node3 MHA] # rpm-ivh perl-List-MoreUtils-0.33-107.1.x86_64.rpm (not required)

[root@node3 MHA] # rpm-ivh perl-IO-stringy-2.110-8.el6.noarch.rpm-- nodeps (not required)

[root@node3 MHA] # rpm-ivh perl-Config-IniFiles-2.72-2.el6.noarch.rpm-nodeps

[root@node3 MHA] # rpm-ivh perl-Mail-Sender-0.8.16-3.el6.noarch.rpm

[root@node3 MHA] # rpm-ivh perl-Mail-Sendmail-0.79-12.el6.noarch.rpm

[root@node3 MHA] # rpm-ivh perl-Log-Dispatch-2.27-1.el6.noarch.rpm-nodeps

DBI installation:

[root@node3 MHA] # cd DBI-1.636

[root@node3 DBI-1.636] # perl Makefile.PL

[root@node3 DBI-1.636] # make-j 8

[root@node3 DBI-1.636] # make install

DBD installation:

[root@node3 MHA] # cd DBD-mysql-4.033_02

[root@node3 DBD-mysql-4.033_02] # perl Makefile.PL-- mysql_config=/usr/local/mysql/bin/mysql_config

[root@node3 DBD-mysql-4.033_02] # make-j 8

[root@node3 DBD-mysql-4.033_02] # make install

4. MySQL installation and master-slave deployment

Percona Server 5.6 installation

[root@node3 MHA] # tar-xzvf percona-server-5.6.32-78.0.tar.gz

[root@node3 MHA] # useradd mysql-s / sbin/nologin

[root@node3 MHA] # cd percona-server-5.6.32-78.0

# cmake-DCMAKE_INSTALL_PREFIX=/usr/local/mysql-DMYSQL_UNIX_ADDR=/usr/local/mysql/mysql.sock-DDEFAULT_CHARSET=utf8-DDEFAULT_COLLATION=utf8_general_ci-DWITH_MYISAM_STORAGE_ENGINE=1-DWITH_INNOBASE_STORAGE_ENGINE=1-DWITH_ARCHIVE_STORAGE_ENGINE=1-DWITH_BLACKHOLE_STORAGE_ENGINE=1-DWITH_MEMORY_STORAGE_ENGINE=1-DENABLED_LOCAL_INFILE=1-DMYSQL_DATADIR=/usr/local/mysql/data/ -DMYSQL_USER=mysql-DENABLE_DOWNLOADS=1-DWITH_WSREP=1-DWITH_EDITLINE=0

[root@node3 percona-server-5.6.32-78.0] # make-j 4

[root@node3 percona-server-5.6.32-78.0] # make install

Initialize the database:

[root@node3 MHA] # cd / usr/local/mysql

[root@node3 mysql] # / scripts/mysql_install_db-- user=mysql-- basedir=/usr/local/mysql-- datadir=/usr/local/mysql/data/

[root@node3 mysql] # cp support-files/mysql.server / etc/init.d/mysqld

[root@node3 mysql] # chkconfig-- add mysqld

[root@node3 mysql] # chkconfig mysqld on

[root@node3 mysql] # chown-R mysql.mysql / usr/local/mysql

[root@node3 mysql] # vi ~ / .bash_profile

PATH=$PATH:$HOME/bin:/usr/local/mysql/bin

[root@node3 mysql] # source ~ / .bash_profile

Configure my.cnf

Node1 node:

[client]

Socket=/usr/local/mysql/mysql.sock

[mysqld]

Datadir=/usr/local/mysql/data

User=mysql

Log-bin=mysql-binlog

Binlog_format=ROW

Server-id=1

Sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

Innodb_locks_unsafe_for_binlog=1

Innodb_autoinc_lock_mode=2

Node2 node

[client]

Socket=/usr/local/mysql/mysql.sock

[mysqld]

Datadir=/usr/local/mysql/data

User=mysql

Log-bin=mysql-binlog

Binlog_format=ROW

Server-id=2

Sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

Innodb_locks_unsafe_for_binlog=1

Innodb_autoinc_lock_mode=2

Node3 node

[client]

Socket=/usr/local/mysql/mysql.sock

[mysqld]

Datadir=/usr/local/mysql/data

User=mysql

Log-bin=mysql-binlog

Binlog_format=ROW

Server-id=3

Sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

Innodb_locks_unsafe_for_binlog=1

Innodb_autoinc_lock_mode=2

Start the Node1 database

[root@node1 mysql] # service mysqld start

Clean up MySQL useless accounts

Mysql > delete from mysql.user where user =''

Mysql > delete from mysql.user where user = 'root' and host='::1'

Mysql > delete from mysql.user where user = 'root' and host='node1'

Mysql > delete from mysql.user where user = 'root' and host='127.0.0.1'

Create a manager management account

Mysql > GRANT SUPER,RELOAD,REPLICATION CLIENT,SELECT ON *. * TO manager@'10.x.x.%' IDENTIFIED BY 'manager'

Mysql > GRANT CREATE,INSERT,UPDATE,DELETE,DROP ON*.* TO manager@'10.x.x.%'

Create a master-slave copy account

Mysql > GRANT RELOAD, SUPER, REPLICATION SLAVE ON*.* TO 'replicat'@'10.x.x.%' IDENTIFIED BY' backup'

Mysql > flush privileges

Start the node2 node database

[root@node2 mysql] # service mysqld start

Start the node3 node database

[root@node3 mysql] # service mysqld start

Master-slave database replication build:

Execute node1 after logging in to MYSQL

Mysql > show master status\ G

* * 1. Row *

File: mysql-binlog.000005

Position: 973

Binlog_Do_DB:

Binlog_Ignore_DB:

Executed_Gtid_Set:

1 row in set (0.00 sec)

Execute node2 after logging in to MYSQL

Mysql > change master to master_host='masterip',master_user='replicat',master_password='backup',master_port=3306,master_log_file='mysql-binlog.000005',master_log_pos= 973

Mysql > start slave

Execute node3 after logging in to MYSQL

Mysql > change master to master_host='masterip',master_user='replicat',master_password='backup',master_port=3306,master_log_file='mysql-binlog.000005',master_log_pos= 973

Mysql > start slave

5. MHA installation and deployment

Node1 is the master node, node2,node3 is the slave node, and node3 is the manager node

1) configure ssh peer

Node1

[root@node1 MHA] # ssh-keygen-t rsa

[root@node1 MHA] # vi ~ / .ssh/authorized_keys

Put the contents of node1,node2,node3 's public key file id_rsa.pub into it

Node2

[root@node2 MHA] # ssh-keygen-t rsa

Copy the authorized_keys of node1 to / root/.ssh/

Node3

[root@node3 MHA] # ssh-keygen-t rsa

Copy the authorized_keys of node1 to / root/.ssh/

Verify each other's login through ssh to ensure that ssh login does not need to enter a password.

Need to configure / etc/hosts hostname and IP resolution

Ip2 node2

Ip3 node3

Ip1 node1

2) node node source code installation

Node1

[root@node1 MHA] # tar-xzvf mha4mysql-node-0.56.tar.gz

[root@node1 MHA] # cd mha4mysql-node-0.56

[root@node1 mha4mysql-node-0.56] # perl Makefile.PL

[root@node1 mha4mysql-node-0.56] # make-j 8

[root@node1 mha4mysql-node-0.56] # make install

Node2

[root@node2 MHA] # tar-xzvf mha4mysql-node-0.56.tar.gz

[root@node2 MHA] # cd mha4mysql-node-0.56

[root@node2 mha4mysql-node-0.56] # perl Makefile.PL

[root@node2 mha4mysql-node-0.56] # make-j 8

[root@node2 mha4mysql-node-0.56] # make install

Node3

[root@node3 MHA] # tar-xzvf mha4mysql-node-0.56.tar.gz

[root@node3 MHA] # cd mha4mysql-node-0.56

[root@node3 mha4mysql-node-0.56] # perl Makefile.PL

[root@node3 mha4mysql-node-0.56] # make-j 8

[root@node3 mha4mysql-node-0.56] # make install

3) manager node source code installation

[root@node3 MHA] # tar-xzvf mha4mysql-manager-0.56.tar.gz

[root@node3 MHA] # cd mha4mysql-manager-0.56

[root@node3 mha4mysql-manager-0.56] # perl Makefile.PL

[root@node3 mha4mysql-manager-0.56] # make-j 8

[root@node3 mha4mysql-manager-0.56] # make install

4) configure MHA for manager node

[root@node3 MHA] # mkdir / etc/mha

[root@node3 MHA] # mkdir-p / usr/local/mha/log

[root@node3 MHA] # vi / etc/mha/manager.cnf

[server default]

Manager_workdir=/usr/local/mha/log

Manager_log=/usr/local/mha/log/manager.log

# account name of ssh key-free login

Ssh_user=root

# mha Management account

User=manager

Password=manager

# mysql copy account, used to synchronize binary logs between master and slave computers, etc.

Repl_user=replicat

Repl_password=backup

# ping interval, used to detect whether the master is normal

Ping_interval=1

[server1]

Hostname=node1

Ip=IP1

# after the MasterCard goes down, priority is given to enabling this as the new master

# candidate_master=1

Master_binlog_dir=/usr/local/mysql/data

[server2]

Hostname=node2

Ip=IP2

Candidate_master=1

Master_binlog_dir=/usr/local/mysql/data

[server3]

Hostname=node3

Ip=IP3

Master_binlog_dir=/usr/local/mysql/data

# # check whether the ssh connection is normal on the manager node

[root@node3 MHA] # masterha_check_ssh-- conf=/etc/mha/manager.cnf

5) start manager

[root@node3 MHA] # nohup masterha_manager-- conf=/etc/mha/manager.cnf > / usr/local/mha/log/mha_manager.log 2 > & 1 &

6) check manager status

[root@node3 MHA] # masterha_check_status-- conf=/etc/mha/manager.cnf

7) close manager

[root@node3 MHA] # masterha_stop-- conf=/etc/mha/manager.cnf

6. Daily management of MHA

1) check the replication structure

Masterha_check_repl-conf=/etc/mha/manager.cnf

2) check MHA status

Masterha_check_status-conf=/etc/mha/manager.cnf

3) start MHA Manager

Nohup masterha_manager-- conf=/etc/mha/manager.cnf > / usr/local/mha/log/mha_manager.log 2 > & 1 &

4) Manual online switching

Masterha_master_switch-conf=/etc/mha/manager.cnf-master_state=alive-new_master_host=node1-new_master_port=3306-orig_master_is_new_slave-running_updates_limit=10000

5) Manual failover

Masterha_master_switch-conf=/etc/mha/manager.cnf-master_state=dead-dead_master_host=node1-dead_master_port=3306-new_master_host=node2-new_master_port=3306-ignore_last_failover

6) Manual step-by-step switching detailed steps

Set manager automatic monitoring to off: masterha_stop-- conf=/etc/mha/manager.cnf

Set the node1 node masterdead:masterha_master_switch-- conf=/etc/mha/manager.cnf-- master_state=dead-- dead_master_host=node1 set the node2 node to the new master:masterha_master_switch-- conf=/etc/mha/manager.cnf-- master_state=alive-- new_master_host=node2

Non-interactive online switching: masterha_master_switch-- conf=/etc/mha/manager.cnf-- master_state=alive-- new_master_host=node2-- interactive=0

7. Installation error message and solution

1) error message 01

[root@node3 MHA] # masterha_check_repl-- conf=/etc/mha/manager.cnf

Sun Aug 21 10:19:11 2016-[warning] Global configuration file / etc/masterha_default.cnf not found. Skipping.

Sun Aug 21 10:19:11 2016-[info] Reading application default configuration from / etc/mha/manager.cnf..

Sun Aug 21 10:19:11 2016-[info] Reading server configuration from / etc/mha/manager.cnf..

Sun Aug 21 10:19:11 2016-[info] MHA::MasterMonitor version 0.56.

Sun Aug 21 10:19:11 2016-[error] [/ usr/local/share/perl5/MHA/ServerManager.pm, ln301] Got MySQL error when connecting node3 (x.x.x.x:3306): 1130:Host 'node3' is not allowed to connect to this MySQL server, but this is not a MySQL crash. Check MySQL server settings.

At / usr/local/share/perl5/MHA/ServerManager.pm line 297

Sun Aug 21 10:19:11 2016-[error] [/ usr/local/share/perl5/MHA/ServerManager.pm, ln301] Got MySQL error when connecting node2 (x.x.x.x:3306): 1130:Host 'x.x.x' is not allowed to connect to this MySQL server, but this is not a MySQL crash. Check MySQL server settings.

At / usr/local/share/perl5/MHA/ServerManager.pm line 297

Sun Aug 21 10:19:11 2016-[error] [/ usr/local/share/perl5/MHA/ServerManager.pm, ln301] Got MySQL error when connecting node1 (x.x.x.x:3306): 1045:Access denied for user 'root'@'xx.xx.xx.xx' (using password: NO), but this is not a MySQL crash. Check MySQL server settings.

At / usr/local/share/perl5/MHA/ServerManager.pm line 297

Sun Aug 21 10:19:11 2016-[error] [/ usr/local/share/perl5/MHA/ServerManager.pm, ln309] Got fatal error, stopping operations

Sun Aug 21 10:19:11 2016-[error] [/ usr/local/share/perl5/MHA/MasterMonitor.pm, ln424] Error happened on checking configurations. At / usr/local/share/perl5/MHA/MasterMonitor.pm line 326

Sun Aug 21 10:19:11 2016-[error] [/ usr/local/share/perl5/MHA/MasterMonitor.pm, ln523] Error happened on monitoring servers.

Sun Aug 21 10:19:11 2016-[info] Got exit code 1 (Not master dead).

MySQL Replication Health is NOT OK!

Solution:

You need to add mysql management account and password to the manager node configuration file, and you need to grant permissions to SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, SUPER, and REPLICATION CLIENT.

2) error message 02

Tue Aug 23 14:10:51 2016-[info] Checking MHA is not monitoring or doing failover..

Tue Aug 23 14:10:51 2016-[error] [/ usr/local/share/perl5/MHA/MasterRotate.pm, ln142] Getting advisory lock failed on the current master. MHA Monitor runs on the current master. Stop MHA Manager/Monitor and try again.

Tue Aug 23 14:10:51 2016-[error] [/ usr/local/share/perl5/MHA/ManagerUtil.pm, ln177] Got ERROR: at / usr/local/bin/masterha_master_switch line 53

Solution:

When you do manual switching, you need to turn off the automatic switching monitoring first.

[root@node3] # masterha_stop-- conf=/etc/mha/manager.cnf

Stopped manager successfully.

[root@node3] # masterha_master_switch-global_conf=/etc/mha/masterha_default.conf-conf=/etc/mha/manager.cnf-master_state=alive-new_master_host=node2-new_master_port=3306-orig_master_is_new_slave-running_updates_limit=10000

8. Appendix

1) MHA common tool commands

-- Manager tool

Masterha_master_monitor # detects whether master is down

Masterha_master_switch # for manual Master switching

Masterha_manager # start MHA monitoring

Masterha_stop # stop MHA monitoring

Masterha_check_status # check the running status of MHA

Masterha_check_ssh # check whether the SSH login between each Node is normal

Masterha_check_repl # check whether mysql replication is normal

Masterha_secondary_check # check the configuration of multiple routes

Masterha_conf_host # add or remove configured Server information

-- Node tool

Save_binary_logs # saves and copies binary logs of master

Apply_diff_relay_logs # identifies differential relay log events and applies them to other Slave

Filter_mysqlbinlog # removes unnecessary Rollback events (MHA no longer uses this tool)

Purge_relay_logs # clears the relay log (does not block SQL threads)

Note: Node tools are usually triggered by Manager scripts and do not need to be called manually

2) Appendix script

Turn off relay log automatic deletion and clean up regularly

Purge_relay_logs-user=root-password=xxx-disable_relay_log_purge-port=3306

Multiple checks to prevent single point of failure of the network

Secondary_check_script=/etc/mha/masterha_secondary_check-s node2-s mysql-- user=root-- master_host=node1-- master_ip=ip1-- master_port=3306

Prevention of cerebral fissure

Shutdown_script = / etc/mha/power_manager

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