一、搭建主从环境
1.MySQL主库搭建
grouadd mysql
useradd -r -g mysql -s /sbin/nologin mysql
卸载MySQL以及mariadb
rpm -qa | grep mysql && rpm -qa | grep mariadb rpm -e --nodeps 包名
创建MySQL相关目录
cd u01 && tar xf mysql-5.7.29-linux-glibc2.12-x86_64.tar.gz mv mysql-5.7.29-linux-glibc2.12-x86_64 mysql/ mkdir -p mysql/{data,logs} chown -R mysql:mysql mysql/ && chmod -R 755 mysql
编辑主库my.cnf配置文件
vim /etc/my.cnf [mysql] default-character-set=utf8 socket=/tmp/mysql.sock [mysqld] #skip-name-reslove port=3306 basedir=/u01/mysql/ datadir=/u01/mysql/data/ character-set-server=utf8 default_storage_engine=InnoDB innodb_buffer_pool_size=200M max_allowed_packet=16M explicit_defaults_for_timestamp=1 lower_case_table_names=1 log-output=FILE general_log=0 general_log_file=/u01/mysql/logs/mysql-general.log slow_query_log=ON slow_query_log_file=/u01/mysql/logs/mysql-query.log long_query_time=10 log-error=/u01/mysql/logs/mysql-error.log bind-address=192.168.10.51 server_id=513306 skip_name_resolve=ON expire_logs_days=7 innodb_support_xa=1 binlog_cache_size=1M max_binlog_size=2048M log_bin_trust_function_creators=1 innodb_flush_log_at_trx_commit=1 sync_binlog=1 transaction-isolation=READ-COMMITTED gtid_mode=ON enforce_gtid_consistency=1 log-slave-updates=1 binlog_gtid_simple_recovery=1 log_bin=/u01/mysql/logs/mysql-bin log_bin_index=/u01/mysql/logs/mysql-bin.index binlog_format=ROW binlog_rows_query_log_events=on plugin_dir=/u01/mysql/lib/plugin plugin_load="rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so" loose_rpl_semi_sync_master_enabled=1 loose_rpl_semi_sync_slave_enabled=1 loose_rpl_semi_master_timeout=5000 rpl_semi_sync_master_wait_point=AFTER_SYNC rpl_semi_sync_master_wait_for_slave_count=1
初始化数据库，密码在log-error中，并修改初始密码
/u01/mysql/bin/mysqld --initialize --user=mysql --basedir=/u01/mysql/ --datadir=/u01/mysql/data ln -vs /u01/mysql/support-files/mysql.server /etc/init.d/mysqld ln -vs /u01/mysql/bin/mysql /usr/bin/ /etc/init.d/mysqld start && mysql -uroot -p #修改初始密码 alter user 'root'@'localhost' identified by 'rootroot'; commit; exit;
2.搭建MySQL从库，步骤与主库一样，不在赘述，附从库my.cnf配置文件
[mysql] default-character-set=utf8 socket=/tmp/mysql.sock [mysqld] #skip-name-reslove port=3306 basedir=/u01/mysql/ datadir=/u01/mysql/data/ character-set-server=utf8 default_storage_engine=InnoDB innodb_buffer_pool_size=200M max_allowed_packet=16M explicit_defaults_for_timestamp=1 lower_case_table_names=1 log-output=FILE general_log=0 general_log_file=/u01/mysql/logs/mysql-general.log slow_query_log=ON slow_query_log_file=/u01/mysql/logs/mysql-query.log long_query_time=10 log-error=/u01/mysql/logs/mysql-error.log bind-address=192.168.10.52 server_id=523306 skip_name_resolve=ON expire_logs_days=7 innodb_support_xa=1 binlog_cache_size=1M max_binlog_size=2048M log_bin_trust_function_creators=1 innodb_flush_log_at_trx_commit=1 sync_binlog=1 transaction-isolation=READ-COMMITTED gtid_mode=ON enforce_gtid_consistency=1 log-slave-updates=1 binlog_gtid_simple_recovery=1 log_bin=/u01/mysql/logs/mysql-bin log_bin_index=/u01/mysql/logs/mysql-bin.index binlog_format=ROW binlog_rows_query_log_events=on relay_log=/u01/mysql/logs/mysql-relay.log read_only=1 plugin_dir=/u01/mysql/lib/plugin plugin_load="rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so" loose_rpl_semi_sync_master_enabled=1 loose_rpl_semi_sync_slave_enabled=1 loose_rpl_semi_master_timeout=5000 rpl_semi_sync_master_wait_point=AFTER_SYNC rpl_semi_sync_master_wait_for_slave_count=1
3.在主库以及所有从库创建repuser、root用户并授予权限
mysql -uroot -proot create user 'repuser'@'%' identified with mysql_native_password by 'repuser123'; grant replication client,replication slave on *.* to 'repuser'@'%'; flush privileges; select user,host from mysql.user;
创建root用户，后面mha-manager配置中会用到
mysql -uroot -proot create user 'root'@'%' identified with mysql_native_password by 'root123'; grant replication client,replication slave on *.* to 'root'@'%'; flush privileges; select user,host from mysql.user;
4.在从库上简历slave与master的连接
mysql -uroot -proot stop slave; reset master; reset slave; change master to master_host='192.168.10.51', master_port=3306, master_user='repuser', master_password='repuser123', master_auto_position=1;
查看主从状态
start slave;
show salve status G
SHOW PROCESSLIST;
5.数据同步有验证，主库创建表，在从库查看是否有相应的表
create user 'eheng'@'%' identified with mysql_native_password by 'oracle'; grant all privileges on newings1.* to 'eheng'@'%'; flush privileges; create database newings1; use newings1; create table newings11(id int,name varchar(40));
6.从库错误处理
①.Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work. cd /u01/mysql/data rm -rf auto.cnf ②.Error 'Operation CREATE USER failed for 'repuser'@'%'' on query. Default database: ''. Query: 'CREATE USER 'repuser'@'%' IDENTIFIED WITH 'mysql_native_password' AS '*D6B70D90834FFD0E0516A62778445C486176C003'' #停止所有从库,并删除从库和主库的repuser并重新创建repuser用户 stop slave; drop user 'repuser'@'%'; reset master; reset master; reset slave; change master to master_host='192.168.10.51', master_port=3306, master_user='repuser', master_password='repuser123', master_auto_position=1;
二、配置MHA高可用
1.配置服务器ssh互信
#配置Hosts vim /etc/hosts 192.168.10.51 master 192.168.10.52 slave1 192.168.10.53 slave2 #配置ssh互信 cd /root ssh-keygen cd .ssh cp id_rsa.pub authorized_keys scp -r .ssh/ root@slave1:/root/ scp -r .ssh/ root@slave2:/root/
2.安装mha-node和mha-manager软件，rpm请自行下载
yum install perl-DBD-MySQL perl-DBI mysql-libs perl-ExtUtils-MakeMaker perl-Class-Load perl-Params-Validate perl-DBD-MySQL perl-Config-Tiny perl-Log-Dispatch perl-Parallel-ForkManager perl-YAML-Tiny perl-PAR-Dist perl-Module-ScanDeps perl-Module-CoreList perl-Module-Build perl-CPAN perl-YAML perl-CPANPLUS perl-File-Remove perl-Module-Install -y tar xf CPAN-1.9205.tar.gz mv CPAN-1.9205 ../ cd ../CPAN-1.9205/ perl Makefile.PL make && make install cd ../src/ tar xf ExtUtils-MakeMaker-6.31.tar.gz mv ExtUtils-MakeMaker-6.31 ../ cd ../ExtUtils-MakeMaker-6.31/ perl Makefile.PL make && make install cd ../src/ tar xf mha4mysql-node-0.58.tar.gz mv mha4mysql-node-0.58 ../ cd ../mha4mysql-node-0.58/ perl Makefile.PL make && make install rpm -ivh perl-Parallel-ForkManager-1.18-2.el7.noarch.rpm rpm -ivh --nodeps perl-Log-Dispatch-2.41-1.el7.1.noarch.rpm
3.在master服务器上安装mha-manager
tar xf mha4mysql-manager-0.58.tar.gz mv mha4mysql-manager-0.58 ../ cd ../mha4mysql-manager-0.58/ perl Makefile.PL make && make install
安装完成后会在/usr/local/bin下生成以下脚本
total 124 4 drwxr-xr-x. 2 root root 4096 Jul 23 23:23 . 0 drwxr-xr-x. 16 root root 238 Jul 23 23:23 .. 20 -r-xr-xr-x. 1 root root 17639 Jul 23 23:18 apply_diff_relay_logs 8 -r-xr-xr-x. 1 root root 4807 Jul 23 23:18 filter_mysqlbinlog 4 -r-xr-xr-x. 1 root root 1995 Jul 23 23:23 masterha_check_repl 4 -r-xr-xr-x. 1 root root 1779 Jul 23 23:23 masterha_check_ssh 4 -r-xr-xr-x. 1 root root 1865 Jul 23 23:23 masterha_check_status 4 -r-xr-xr-x. 1 root root 3201 Jul 23 23:23 masterha_conf_host 4 -r-xr-xr-x. 1 root root 2517 Jul 23 23:23 masterha_manager 4 -r-xr-xr-x. 1 root root 2165 Jul 23 23:23 masterha_master_monitor 4 -r-xr-xr-x. 1 root root 2373 Jul 23 23:23 masterha_master_switch 8 -r-xr-xr-x. 1 root root 5172 Jul 23 23:23 masterha_secondary_check 4 -r-xr-xr-x. 1 root root 1739 Jul 23 23:23 masterha_stop 4 -rwxr-xr-x. 1 root root 3648 Jul 23 23:23 master_ip_failover 12 -rwxr-xr-x. 1 root root 9870 Jul 23 23:23 master_ip_online_change 12 -rwxr-xr-x. 1 root root 11867 Jul 23 23:23 power_manager 12 -r-xr-xr-x. 1 root root 8337 Jul 23 23:18 purge_relay_logs 8 -r-xr-xr-x. 1 root root 7525 Jul 23 23:18 save_binary_logs 4 -rwxr-xr-x. 1 root root 1360 Jul 23 23:23 send_report
将安装目录下的示例脚本复制到/usr/local/bin目录下，但这些脚本其实并不完整，需要自己调整，脚本是由软件开发者提供，开启一个参数需有一个对应的脚本，没有则会抛出错误
cp /usr/local/mha4mysql-manager-0.58/samples/scripts/ * /usr/local/bin/
4.配置MHA参数
mkdir -p /etc/masterha mkdir -p /u01/mha cp /usr/local/mha4mysql-manager-0.58/conf/app1.cnf /etc/masterha vim /etc/masterha #配置参数 manager_workdir=/u01/mha manager_log=/u01/mha/manager.log master_binlog_dir=/u01/mysql/logs/ master_ip_failover_script=/usr/local/bin/master_ip_failover master_ip_online_change_script=/usr/local/bin/master_ip_online_change secondary_check_script=/usr/local/bin/masterha_secondary_check -s 192.168.10.53 -s 192.168.10.52 report_script=/usr/local/bin/send_report remote_workdir=/tmp password=root123 user=root ping_interval=1 repl_password=repuser123 repl_user=repuser ssh_user=root [server1] hostname=192.168.10.51 candidate_master=1 [server2] hostname=192.168.10.52 candidate_master=1 [server3] hostname=192.168.10.53 candidate_master=1
修改master_ip_failover脚本
#!/bin/env perl use strict; use warnings FATAL => 'all'; use Getopt::Long; my ( $command, $ssh_user, $orig_master_host, $orig_master_ip, $orig_master_port, $new_master_host, $new_master_ip, $new_master_port ); my $vip = '192.168.10.250/24'; # Virtual IP my $gateway = '192.168.10.1'; #Gateway IP my $interface = 'enp0s3'; my $key = "1"; my $ssh_start_vip = "/sbin/ifconfig $interface:$key $vip;/sbin/arping -I $interface -c 3 -s $vip $gateway >/dev/null 2>&1"; my $ssh_stop_vip = "/sbin/ifconfig $interface:$key down"; GetOptions( 'command=s' => $command, 'ssh_user=s' => $ssh_user, 'orig_master_host=s' => $orig_master_host, 'orig_master_ip=s' => $orig_master_ip, 'orig_master_port=i' => $orig_master_port, 'new_master_host=s' => $new_master_host, 'new_master_ip=s' => $new_master_ip, 'new_master_port=i' => $new_master_port, ); exit &main(); sub main { print " IN SCRIPT TEST====$ssh_stop_vip==$ssh_start_vip=== "; if ( $command eq "stop" || $command eq "stopssh" ) { #$orig_master_host, $orig_master_ip, $orig_master_port are passed. # If you manage master ip address at global catalog database, # invalidate orig_master_ip here. my $exit_code = 1; eval { print "Disabling the VIP on old master: $orig_master_host "; &stop_vip(); $exit_code = 0; }; if ($@) { warn "Got Error: $@ "; exit $exit_code; } exit $exit_code; } elsif ( $command eq "start" ) { # all arguments are passed. # If you manage master ip address at global catalog database, # activate new_master_ip here. # You can also grant write access (create user, set read_only=0, etc) here. my $exit_code = 10; eval { print "Enabling the VIP - $vip on the new master - $new_master_host "; &start_vip(); $exit_code = 0; }; if ($@) { warn $@; exit $exit_code; } exit $exit_code; } elsif ( $command eq "status" ) { print "Checking the Status of the script.. OK "; `ssh $ssh_user@$orig_master_host " $ssh_start_vip "`; exit 0; } else { &usage(); exit 1; } } # A simple system call that enable the VIP on the new master sub start_vip() { `ssh $ssh_user@$new_master_host " $ssh_start_vip "`; } # A simple system call that disable the VIP on the old_master sub stop_vip() { `ssh $ssh_user@$orig_master_host " $ssh_stop_vip "`; } sub usage { print "Usage: master_ip_failover --command=start|stop|stopssh|status --orig_master_host=host --orig_master_ip=ip --orig_master_port=port --new_master_host=host --new_master_ip=ip --new_master_port=port "; }
5.测试mha ssh连接
[root@master bin]# masterha_check_ssh --conf=/etc/masterha/app1.cnf Sat Jul 24 01:01:46 2021 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping. Sat Jul 24 01:01:46 2021 - [info] Reading application default configuration from /etc/masterha/app1.cnf.. Sat Jul 24 01:01:46 2021 - [info] Reading server configuration from /etc/masterha/app1.cnf.. Sat Jul 24 01:01:46 2021 - [info] Starting SSH connection tests.. Sat Jul 24 01:01:48 2021 - [debug] Sat Jul 24 01:01:46 2021 - [debug] Connecting via SSH from root@192.168.10.51(192.168.10.51:22) to root@192.168.10.52(192.168.10.52:22).. Sat Jul 24 01:01:47 2021 - [debug] ok. Sat Jul 24 01:01:47 2021 - [debug] Connecting via SSH from root@192.168.10.51(192.168.10.51:22) to root@192.168.10.53(192.168.10.53:22).. Sat Jul 24 01:01:48 2021 - [debug] ok. Sat Jul 24 01:01:49 2021 - [debug] Sat Jul 24 01:01:47 2021 - [debug] Connecting via SSH from root@192.168.10.53(192.168.10.53:22) to root@192.168.10.51(192.168.10.51:22).. Sat Jul 24 01:01:48 2021 - [debug] ok. Sat Jul 24 01:01:48 2021 - [debug] Connecting via SSH from root@192.168.10.53(192.168.10.53:22) to root@192.168.10.52(192.168.10.52:22).. Sat Jul 24 01:01:49 2021 - [debug] ok. Sat Jul 24 01:01:49 2021 - [debug] Sat Jul 24 01:01:47 2021 - [debug] Connecting via SSH from root@192.168.10.52(192.168.10.52:22) to root@192.168.10.51(192.168.10.51:22).. Sat Jul 24 01:01:48 2021 - [debug] ok. Sat Jul 24 01:01:48 2021 - [debug] Connecting via SSH from root@192.168.10.52(192.168.10.52:22) to root@192.168.10.53(192.168.10.53:22).. Sat Jul 24 01:01:48 2021 - [debug] ok. Sat Jul 24 01:01:49 2021 - [info] All SSH connection tests passed successfully.
测试复制
[root@master bin]# masterha_check_repl --conf=/etc/masterha/app1.cnf Sat Jul 24 01:13:02 2021 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping. Sat Jul 24 01:13:02 2021 - [info] Reading application default configuration from /etc/masterha/app1.cnf.. Sat Jul 24 01:13:02 2021 - [info] Reading server configuration from /etc/masterha/app1.cnf.. Sat Jul 24 01:13:02 2021 - [info] MHA::MasterMonitor version 0.58. Sat Jul 24 01:13:03 2021 - [info] GTID failover mode = 0 Sat Jul 24 01:13:03 2021 - [info] Dead Servers: Sat Jul 24 01:13:03 2021 - [info] Alive Servers: Sat Jul 24 01:13:03 2021 - [info] 192.168.10.51(192.168.10.51:3306) Sat Jul 24 01:13:03 2021 - [info] 192.168.10.52(192.168.10.52:3306) Sat Jul 24 01:13:03 2021 - [info] 192.168.10.53(192.168.10.53:3306) Sat Jul 24 01:13:03 2021 - [info] Alive Slaves: Sat Jul 24 01:13:03 2021 - [info] 192.168.10.52(192.168.10.52:3306) Version=5.7.29-log (oldest major version between slaves) log-bin:enabled Sat Jul 24 01:13:03 2021 - [info] GTID ON Sat Jul 24 01:13:03 2021 - [info] Replicating from 192.168.10.51(192.168.10.51:3306) Sat Jul 24 01:13:03 2021 - [info] Primary candidate for the new Master (candidate_master is set) Sat Jul 24 01:13:03 2021 - [info] 192.168.10.53(192.168.10.53:3306) Version=5.7.29-log (oldest major version between slaves) log-bin:enabled Sat Jul 24 01:13:03 2021 - [info] GTID ON Sat Jul 24 01:13:03 2021 - [info] Replicating from 192.168.10.51(192.168.10.51:3306) Sat Jul 24 01:13:03 2021 - [info] Primary candidate for the new Master (candidate_master is set) Sat Jul 24 01:13:03 2021 - [info] Current Alive Master: 192.168.10.51(192.168.10.51:3306) Sat Jul 24 01:13:03 2021 - [info] Checking slave configurations.. Sat Jul 24 01:13:03 2021 - [info] Checking replication filtering settings.. Sat Jul 24 01:13:03 2021 - [info] binlog_do_db= , binlog_ignore_db= Sat Jul 24 01:13:03 2021 - [info] Replication filtering check ok. Sat Jul 24 01:13:03 2021 - [info] GTID (with auto-pos) is not supported Sat Jul 24 01:13:03 2021 - [info] Starting SSH connection tests.. Sat Jul 24 01:13:06 2021 - [info] All SSH connection tests passed successfully. Sat Jul 24 01:13:06 2021 - [info] Checking MHA Node version.. Sat Jul 24 01:13:06 2021 - [info] Version check ok. Sat Jul 24 01:13:06 2021 - [info] Checking SSH publickey authentication settings on the current master.. Sat Jul 24 01:13:07 2021 - [info] HealthCheck: SSH to 192.168.10.51 is reachable. Sat Jul 24 01:13:07 2021 - [info] Checking recovery script configurations on 192.168.10.51(192.168.10.51:3306).. Sat Jul 24 01:13:07 2021 - [info] Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/u01/mysql/logs/ --output_file=/tmp/save_binary_logs_test --manager_version=0.58 --start_file=mysql-bin.000001 Sat Jul 24 01:13:07 2021 - [info] Connecting to root@192.168.10.51(192.168.10.51:22).. Creating /tmp if not exists.. ok. Checking output directory is accessible or not.. ok. Binlog found at /u01/mysql/logs/, up to mysql-bin.000001 Sat Jul 24 01:13:07 2021 - [info] Binlog setting check done. Sat Jul 24 01:13:07 2021 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers.. Sat Jul 24 01:13:07 2021 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=192.168.10.52 --slave_ip=192.168.10.52 --slave_port=3306 --workdir=/tmp --target_version=5.7.29-log --manager_version=0.58 --relay_log_info=/u01/mysql/data/relay-log.info --relay_dir=/u01/mysql/data/ --slave_pass=xxx Sat Jul 24 01:13:07 2021 - [info] Connecting to root@192.168.10.52(192.168.10.52:22).. Checking slave recovery environment settings.. Opening /u01/mysql/data/relay-log.info ... ok. Relay log found at /u01/mysql/logs, up to mysql-relay.000002 Temporary relay log file is /u01/mysql/logs/mysql-relay.000002 Checking if super_read_only is defined and turned on.. not present or turned off, ignoring. Testing mysql connection and privileges.. mysql: [Warning] Using a password on the command line interface can be insecure. done. Testing mysqlbinlog output.. done. Cleaning up test file(s).. done. Sat Jul 24 01:13:07 2021 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=192.168.10.53 --slave_ip=192.168.10.53 --slave_port=3306 --workdir=/tmp --target_version=5.7.29-log --manager_version=0.58 --relay_log_info=/u01/mysql/data/relay-log.info --relay_dir=/u01/mysql/data/ --slave_pass=xxx Sat Jul 24 01:13:07 2021 - [info] Connecting to root@192.168.10.53(192.168.10.53:22).. Checking slave recovery environment settings.. Opening /u01/mysql/data/relay-log.info ... ok. Relay log found at /u01/mysql/logs, up to mysql-relay.000002 Temporary relay log file is /u01/mysql/logs/mysql-relay.000002 Checking if super_read_only is defined and turned on.. not present or turned off, ignoring. Testing mysql connection and privileges.. mysql: [Warning] Using a password on the command line interface can be insecure. done. Testing mysqlbinlog output.. done. Cleaning up test file(s).. done. Sat Jul 24 01:13:08 2021 - [info] Slaves settings check done. Sat Jul 24 01:13:08 2021 - [info] 192.168.10.51(192.168.10.51:3306) (current master) +--192.168.10.52(192.168.10.52:3306) +--192.168.10.53(192.168.10.53:3306) Sat Jul 24 01:13:08 2021 - [info] Checking replication health on 192.168.10.52.. Sat Jul 24 01:13:08 2021 - [info] ok. Sat Jul 24 01:13:08 2021 - [info] Checking replication health on 192.168.10.53.. Sat Jul 24 01:13:08 2021 - [info] ok. Sat Jul 24 01:13:08 2021 - [info] Checking master_ip_failover_script status: Sat Jul 24 01:13:08 2021 - [info] /usr/local/bin/master_ip_failover --command=status --ssh_user=root --orig_master_host=192.168.10.51 --orig_master_ip=192.168.10.51 --orig_master_port=3306 IN SCRIPT TEST====/sbin/ifconfig enp0s3:1 down==/sbin/ifconfig enp0s3:1 192.168.10.250/24;/sbin/arping -I enp0s3 -c 3 -s 192.168.10.250/24 192.168.10.1 >/dev/null 2>&1=== Checking the Status of the script.. OK Sat Jul 24 01:13:08 2021 - [info] OK. Sat Jul 24 01:13:08 2021 - [warning] shutdown_script is not defined. Sat Jul 24 01:13:08 2021 - [info] Got exit code 0 (Not master dead). MySQL Replication Health is OK.
测试复制过程中出现的问题
[root@master bin]# masterha_check_repl --conf=/etc/masterha/app1.cnf Sat Jul 24 00:00:10 2021 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping. Sat Jul 24 00:00:10 2021 - [info] Reading application default configuration from /etc/masterha/app1.cnf.. Sat Jul 24 00:00:10 2021 - [info] Reading server configuration from /etc/masterha/app1.cnf.. Sat Jul 24 00:00:10 2021 - [info] MHA::MasterMonitor version 0.58. Sat Jul 24 00:00:11 2021 - [info] GTID failover mode = 0 Sat Jul 24 00:00:11 2021 - [info] Dead Servers: Sat Jul 24 00:00:11 2021 - [info] Alive Servers: Sat Jul 24 00:00:11 2021 - [info] 192.168.10.51(192.168.10.51:3306) Sat Jul 24 00:00:11 2021 - [info] 192.168.10.52(192.168.10.52:3306) Sat Jul 24 00:00:11 2021 - [info] 192.168.10.53(192.168.10.53:3306) Sat Jul 24 00:00:11 2021 - [info] Alive Slaves: Sat Jul 24 00:00:11 2021 - [info] 192.168.10.52(192.168.10.52:3306) Version=5.7.29-log (oldest major version between slaves) log-bin:enabled Sat Jul 24 00:00:11 2021 - [info] GTID ON Sat Jul 24 00:00:11 2021 - [info] Replicating from 192.168.10.51(192.168.10.51:3306) Sat Jul 24 00:00:11 2021 - [info] Primary candidate for the new Master (candidate_master is set) Sat Jul 24 00:00:11 2021 - [info] 192.168.10.53(192.168.10.53:3306) Version=5.7.29-log (oldest major version between slaves) log-bin:enabled Sat Jul 24 00:00:11 2021 - [info] GTID ON Sat Jul 24 00:00:11 2021 - [info] Replicating from 192.168.10.51(192.168.10.51:3306) Sat Jul 24 00:00:11 2021 - [info] Primary candidate for the new Master (candidate_master is set) Sat Jul 24 00:00:11 2021 - [info] Current Alive Master: 192.168.10.51(192.168.10.51:3306) Sat Jul 24 00:00:11 2021 - [info] Checking slave configurations.. Sat Jul 24 00:00:11 2021 - [info] Checking replication filtering settings.. Sat Jul 24 00:00:11 2021 - [info] binlog_do_db= , binlog_ignore_db= Sat Jul 24 00:00:11 2021 - [info] Replication filtering check ok. Sat Jul 24 00:00:11 2021 - [info] GTID (with auto-pos) is not supported Sat Jul 24 00:00:11 2021 - [info] Starting SSH connection tests.. Sat Jul 24 00:00:13 2021 - [info] All SSH connection tests passed successfully. Sat Jul 24 00:00:13 2021 - [info] Checking MHA Node version.. Sat Jul 24 00:00:14 2021 - [info] Version check ok. Sat Jul 24 00:00:14 2021 - [info] Checking SSH publickey authentication settings on the current master.. Sat Jul 24 00:00:14 2021 - [info] HealthCheck: SSH to 192.168.10.51 is reachable. Sat Jul 24 00:00:14 2021 - [info] Checking recovery script configurations on 192.168.10.51(192.168.10.51:3306).. Sat Jul 24 00:00:14 2021 - [info] Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/u01/mysql/logs/ --output_file=/var/tmp/save_binary_logs_test --manager_version=0.58 --start_file=mysql-bin.000001 Sat Jul 24 00:00:14 2021 - [info] Connecting to root@192.168.10.51(192.168.10.51:22).. Creating /var/tmp if not exists.. ok. Checking output directory is accessible or not.. ok. Binlog found at /u01/mysql/logs/, up to mysql-bin.000001 Sat Jul 24 00:00:14 2021 - [info] Binlog setting check done. Sat Jul 24 00:00:14 2021 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers.. Sat Jul 24 00:00:14 2021 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=192.168.10.52 --slave_ip=192.168.10.52 --slave_port=3306 --workdir=/var/tmp --target_version=5.7.29-log --manager_version=0.58 --relay_log_info=/u01/mysql/data/relay-log.info --relay_dir=/u01/mysql/data/ --slave_pass=xxx Sat Jul 24 00:00:14 2021 - [info] Connecting to root@192.168.10.52(192.168.10.52:22).. Can't exec "mysqlbinlog": Too many levels of symbolic links at /usr/local/share/perl5/MHA/BinlogManager.pm line 106. mysqlbinlog version command failed with rc 1:0, please verify PATH, LD_LIBRARY_PATH, and client options at /usr/local/bin/apply_diff_relay_logs line 532. Sat Jul 24 00:00:15 2021 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln208] Slaves settings check failed! Sat Jul 24 00:00:15 2021 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln416] Slave configuration failed. Sat Jul 24 00:00:15 2021 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln427] Error happened on checking configurations. at /usr/local/bin/masterha_check_repl line 48. Sat Jul 24 00:00:15 2021 - [error][/usr/local/share/perl5/MHA/MasterMonitor.pm, ln525] Error happened on monitoring servers. Sat Jul 24 00:00:15 2021 - [info] Got exit code 1 (Not master dead). MySQL Replication Health is NOT OK!
针对上面问题的解决办法
#在profile加入mysql环境变量，master以及所有slave都执行，并刷新环境变量 PATH=$PATH:$HOME/bin:/u01/mysql/bin export PATH #如果错误继续出现，则是使用下面的办法，master以及所有slave都执行 ln -vs /u01/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog ln -vs /u01/mysql/bin/mysql /usr/local/bin/mysql
6.启动、停止并查看mha状态
[root@master bin]# masterha_manager --conf=/etc/masterha/app1.cnf & [1] 21163 [root@master bin]# Sat Jul 24 01:08:45 2021 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping. Sat Jul 24 01:08:45 2021 - [info] Reading application default configuration from /etc/masterha/app1.cnf.. Sat Jul 24 01:08:45 2021 - [info] Reading server configuration from /etc/masterha/app1.cnf.. #查看mha进程 [root@master bin]# ps -ef|grep masterha root 21163 15903 1 01:08 pts/1 00:00:00 perl /usr/local/bin/masterha_manager --conf=/etc/masterha/app1.cnf root 21293 15903 0 01:08 pts/1 00:00:00 grep --color=auto masterha #查看mha状态 [root@master bin]# masterha_check_status --conf=/etc/masterha/app1.cnf app1 (pid:21163) is running(0:PING_OK), master:192.168.10.51 #停止mha masterha_stop --conf=/etc/masterha/app1.cnf
7.相关资料
https://www.cnblogs.com/panwenbin-logs/p/8306906.html https://www.cnblogs.com/sky-cheng/p/10972424.html
在线切换、故障切换以及一些辅助脚本，后续再陆续补齐！或者参照上面的资料也可