grant replication slave on *.* to mharep@'192.168.1.%' identified by 'passwd';
flush privileges;
stop slave;
#设置复制权限帐号
GRANT ALL PRIVILEGES ON *.* TO 'mha_manager'@'192.168.1.%' IDENTIFIED BY '123456';
reset master;
show master status\G
db2备(即将做双主的这台机)
grant replication slave on *.* to mharep@'192.168.1.%' identified by 'passwd';
GRANT ALL PRIVILEGES ON *.* TO 'mha_manager'@'192.168.1.%' IDENTIFIED BY '123456';
flush privileges;
reset master;
slave stop;
change master to MASTER_HOST='192.168.1.2', MASTER_PORT=3306,MASTER_USER='mharep', MASTER_PASSWORD='passwd',master_log_file='mysql-bin.000001', master_log_pos=107;
slave start;
show slave status\G;
db3从(现有的从库)
reset master;
slave stop;
GRANT ALL PRIVILEGES ON *.* TO 'mha_manager'@'192.168.1.%' IDENTIFIED BY '123456';
flush privileges;
change master to MASTER_HOST='192.168.1.2', MASTER_PORT=3306,MASTER_USER='mharep', MASTER_PASSWORD='passwd',master_log_file='mysql-bin.000001', master_log_pos=107;
slave start;
show slave status\G;
配置双机互信
manager
ssh-keygen -t rsa
for i in db1 db2 db3;do ssh-copy-id -i ~/.ssh/id_rsa.pub root@$i;done
db1主
ssh-keygen -t rsa
for i in manager db2 db3;do ssh-copy-id -i ~/.ssh/id_rsa.pub root@$i;done
[root@manager ~]# masterha_check_repl --conf=/usr/local/mha/mha.conf
Thu Jan 8 18:05:40 2015 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Thu Jan 8 18:05:40 2015 - [info] Reading application default configurations from /usr/local/mha/mha.conf..
Thu Jan 8 18:05:40 2015 - [info] Reading server configurations from /usr/local/mha/mha.conf..
Thu Jan 8 18:05:40 2015 - [info] MHA::MasterMonitor version 0.55.
Thu Jan 8 18:05:40 2015 - [info] Dead Servers:
Thu Jan 8 18:05:40 2015 - [info] Alive Servers:
Thu Jan 8 18:05:40 2015 - [info] 192.168.1.2(192.168.1.2:3306)
Thu Jan 8 18:05:40 2015 - [info] 192.168.1.3(192.168.1.3:3306)
Thu Jan 8 18:05:40 2015 - [info] 192.168.1.4(192.168.1.4:3306)
Thu Jan 8 18:05:40 2015 - [info] Alive Slaves:
Thu Jan 8 18:05:40 2015 - [info] 192.168.1.3(192.168.1.3:3306) Version=5.5.37-log (oldest major version between slaves) log-bin:enabled
Thu Jan 8 18:05:40 2015 - [info] Replicating from 192.168.1.2(192.168.1.2:3306)
Thu Jan 8 18:05:40 2015 - [info] Primary candidate for the new Master (candidate_master is set)
Thu
Jan 8 18:05:40 2015 - [info] 192.168.1.4(192.168.1.4:3306)
Version=5.5.37-log (oldest major version between slaves) log-bin:enabled
Thu Jan 8 18:05:40 2015 - [info] Replicating from 192.168.1.2(192.168.1.2:3306)
Thu Jan 8 18:05:40 2015 - [info] Not candidate for the new Master (no_master is set)
Thu Jan 8 18:05:40 2015 - [info] Current Alive Master: 192.168.1.2(192.168.1.2:3306)
Thu Jan 8 18:05:40 2015 - [info] Checking slave configurations..
Thu Jan 8 18:05:40 2015 - [info] Checking replication filtering settings..
Thu Jan 8 18:05:40 2015 - [info] binlog_do_db= , binlog_ignore_db=
Thu Jan 8 18:05:40 2015 - [info] Replication filtering check ok.
Thu Jan 8 18:05:40 2015 - [info] Starting SSH connection tests..
Thu Jan 8 18:05:41 2015 - [info] All SSH connection tests passed successfully.
Thu Jan 8 18:05:41 2015 - [info] Checking MHA Node version..
Thu Jan 8 18:05:42 2015 - [info] Version check ok.
Thu Jan 8 18:05:42 2015 - [info] Checking SSH publickey authentication settings on the current master..
Thu Jan 8 18:05:42 2015 - [info] HealthCheck: SSH to 192.168.1.2 is reachable.
Thu Jan 8 18:05:42 2015 - [info] Master MHA Node version is 0.54.
Thu Jan 8 18:05:42 2015 - [info] Checking recovery script configurations on the current master..
Thu
Jan 8 18:05:42 2015 - [info] Executing command: save_binary_logs
--command=test --start_pos=4 --binlog_dir=/var/mysql/log
--output_file=/usr/local/mha/save_binary_logs_test
--manager_version=0.55 --start_file=mysql-bin.000002
Thu Jan 8 18:05:42 2015 - [info] Connecting to root@192.168.1.2(192.168.1.2)..
Creating /usr/local/mha if not exists.. ok.
Checking output directory is accessible or not..
ok.
Binlog found at /var/mysql/log, up to mysql-bin.000002
Thu Jan 8 18:05:42 2015 - [info] Master setting check done.
Thu
Jan 8 18:05:42 2015 - [info] Checking SSH publickey authentication and
checking recovery script configurations on all alive slave servers..
Thu
Jan 8 18:05:42 2015 - [info] Executing command :
apply_diff_relay_logs --command=test --slave_user='mha_manager'
--slave_host=192.168.1.3 --slave_ip=192.168.1.3 --slave_port=3306
--workdir=/usr/local/mha --target_version=5.5.37-log
--manager_version=0.55 --relay_log_info=/var/mysql/data/relay-log.info
--relay_dir=/var/mysql/data/ --slave_pass=xxx
Thu Jan 8 18:05:42 2015 - [info] Connecting to root@192.168.1.3(192.168.1.3:22)..
Checking slave recovery environment settings..
Opening /var/mysql/data/relay-log.info ... ok.
Relay log found at /var/mysql/data, up to mysql-relay-bin.000007
Temporary relay log file is /var/mysql/data/mysql-relay-bin.000007
Testing mysql connection and privileges.. done.
Testing mysqlbinlog output.. done.
Cleaning up test file(s).. done.
Thu
Jan 8 18:05:42 2015 - [info] Executing command :
apply_diff_relay_logs --command=test --slave_user='mha_manager'
--slave_host=192.168.1.4 --slave_ip=192.168.1.4 --slave_port=3306
--workdir=/usr/local/mha --target_version=5.5.37-log
--manager_version=0.55 --relay_log_info=/var/mysql/data/relay-log.info
--relay_dir=/var/mysql/data/ --slave_pass=xxx
Thu Jan 8 18:05:42 2015 - [info] Connecting to root@192.168.1.4(192.168.1.4:22)..
Checking slave recovery environment settings..
Opening /var/mysql/data/relay-log.info ... ok.
Relay log found at /var/mysql/data, up to mysql-relay-bin.000006
Temporary relay log file is /var/mysql/data/mysql-relay-bin.000006
Testing mysql connection and privileges.. done.
Testing mysqlbinlog output.. done.
Cleaning up test file(s).. done.
Thu Jan 8 18:05:43 2015 - [info] Slaves settings check done.
Thu Jan 8 18:05:43 2015 - [info]
192.168.1.2 (current master)
+--192.168.1.3
+--192.168.1.4
Thu Jan 8 18:05:43 2015 - [info] Checking replication health on 192.168.1.3..
Thu Jan 8 18:05:43 2015 - [info] ok.
Thu Jan 8 18:05:43 2015 - [info] Checking replication health on 192.168.1.4..
Thu Jan 8 18:05:43 2015 - [info] ok.
Thu Jan 8 18:05:43 2015 - [info] Checking master_ip_failover_script status:
Thu
Jan 8 18:05:43 2015 - [info]
/usr/local/mha/scripts/master_ip_failover --command=status
--ssh_user=root --orig_master_host=192.168.1.2
--orig_master_ip=192.168.1.2 --orig_master_port=3306
IN
SCRIPT TEST====/sbin/ifconfig eth0:1 down==/sbin/ifconfig eth0:1
192.168.1.100;/sbin/arping -I eth0 -c 3 -s 192.168.1.100 192.168.1.1
>/dev/null 2>&1===
Checking the Status of the script.. OK
Thu Jan 8 18:05:46 2015 - [info] OK.
Thu Jan 8 18:05:46 2015 - [warning] shutdown_script is not defined.
Thu Jan 8 18:05:46 2015 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.
启动MHA
mv /usr/local/mha/scripts/master_ip_failover /usr/local/mha/scripts/master_ip_failover.def
vim /usr/local/mha/scripts/master_ip_failover
#!/usr/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 = '192.168.1.100'; # Virtual IP
my $gateway = '192.168.1.1'; #Gateway IP
my $interface = 'eth0';
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 "\n\nIN SCRIPT TEST====$ssh_stop_vip==$ssh_start_vip===\n\n";
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 \n";
&stop_vip();
$exit_code = 0;
};
if ($@) {
warn "Got Error: $@\n";
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 \n";
&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 \n";
`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\n";
}
# sed -i 's/#master_ip_failover_script/master_ip_failover_script/' /usr/local/mha/mha.conf
配置文件的master_ip_failover_script前面注释#取消
[root@db1 ~]# ip a #现在有VIP
[root@db1 ~]# service mysqld stop #mysql停止，在这时候VIP会做转移
Shutting down MySQL... SUCCESS!
[root@db1 ~]# ip a #已经没有VIP
IP已经转移到db2，并且在db3上 mysql> show slave status\G 查看 Master_Server_Id: 2
Fri Jan 9 10:09:39 2015 - [info] Executing seconary network check script: masterha_secondary_check -s 192.168.1.2 -s 192.168.1.3 -s 192.168.1.4 --user=root --master_host=192.168.1.2 --master_ip=192.168.1.2 --master_port=3306
Fri Jan 9 10:09:39 2015 - [info] Executing SSH check script: save_binary_logs --command=test --start_pos=4 --binlog_dir=/var/mysql/log --output_file=/usr/local/mha/save_binary_logs_test --manager_version=0.55 --binlog_prefix=mysql-bin
Fri Jan 9 10:09:39 2015 - [info] HealthCheck: SSH to 192.168.1.2 is reachable.
Monitoring server 192.168.1.2 is reachable, Master is not reachable from 192.168.1.2. OK.
Monitoring server 192.168.1.3 is reachable, Master is not reachable from 192.168.1.3. OK.
Monitoring server 192.168.1.4 is reachable, Master is not reachable from 192.168.1.4. OK.
Fri Jan 9 10:09:39 2015 - [info] Master is not reachable from all other monitoring servers. Failover should start.
Fri Jan 9 10:09:40 2015 - [warning] Got error on MySQL connect: 2013 (Lost connection to MySQL server at 'reading initial communication packet', system error: 111)
Fri Jan 9 10:09:40 2015 - [warning] Connection failed 1 time(s)..
#转移
Fri Jan 9 10:09:42 2015 - [info] Dead Servers:
Fri Jan 9 10:09:42 2015 - [info] 192.168.1.2(192.168.1.2:3306)
Fri Jan 9 10:09:42 2015 - [info] Alive Servers:
Fri Jan 9 10:09:42 2015 - [info] 192.168.1.3(192.168.1.3:3306)
Fri Jan 9 10:09:42 2015 - [info] 192.168.1.4(192.168.1.4:3306)
Fri Jan 9 10:09:42 2015 - [info] Alive Slaves:
Fri Jan 9 10:09:42 2015 - [info] 192.168.1.3(192.168.1.3:3306) Version=5.5.37-log (oldest major version between slaves) log-bin:enabled
Fri Jan 9 10:09:42 2015 - [info] Replicating from 192.168.1.2(192.168.1.2:3306)
Fri Jan 9 10:09:42 2015 - [info] Primary candidate for the new Master (candidate_master is set)
Fri Jan 9 10:09:42 2015 - [info] 192.168.1.4(192.168.1.4:3306) Version=5.5.37-log (oldest major version between slaves) log-bin:enabled
Fri Jan 9 10:09:42 2015 - [warning] relay_log_purge=0 is not set on slave 192.168.1.3(192.168.1.3:3306).
Fri Jan 9 10:09:42 2015 - [warning] relay_log_purge=0 is not set on slave 192.168.1.4(192.168.1.4:3306).
Disabling the VIP on old master: 192.168.1.2
Fri Jan 9 10:09:42 2015 - [info] done.
Fri Jan 9 10:09:42 2015 - [warning] shutdown_script is not set. Skipping explicit shutting down of the dead master.
Fri Jan 9 10:09:42 2015 - [info] The latest binary log file/position on all slaves is mysql-bin.000003:107
Fri Jan 9 10:09:42 2015 - [info] Latest slaves (Slaves that received relay log files to the latest):
Fri Jan 9 10:09:42 2015 - [info] 192.168.1.3(192.168.1.3:3306) Version=5.5.37-log (oldest major version between slaves) log-bin:enabled
Fri Jan 9 10:09:42 2015 - [info] Replicating from 192.168.1.2(192.168.1.2:3306)
Fri Jan 9 10:09:42 2015 - [info] Primary candidate for the new Master (candidate_master is set)
Fri Jan 9 10:09:42 2015 - [info] 192.168.1.4(192.168.1.4:3306) Version=5.5.37-log (oldest major version between slaves) log-bin:enabled
#转移后
Fri Jan 9 10:09:43 2015 - [info] Starting master failover..
Fri Jan 9 10:09:43 2015 - [info]
From:
192.168.1.2 (current master)
+--192.168.1.3
+--192.168.1.4
To:
192.168.1.3 (new master)
+--192.168.1.4
----- Failover Report -----
mha: MySQL Master failover 192.168.1.2 to 192.168.1.3 succeeded
如果有这个提示，那么删除此文件/usr/local/mha/mha.failover.complete
[error][/usr/share/perl5/vendor_perl/MHA/MasterFailover.pm, ln298] Last failover was done at 2015/01/09 10:00:47. Current time is too early to do failover again. If you want to do failover, manually remove /usr/local/mha/mha.failover.complete and run this script again.
数据库
发布于：2021-07-03 21:45
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