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1,如果主节点已经运行了一段时间，且有大量数据时，如何配置并启动slave节点
#备份主节点数据库
[root@master ~] mysqldump -A -F --single-transaction --master-data=1 > /data/mariadb_backup_`date +%F_%T`.sql
[root@master ~] ll /data/
total 1496 -rw-r--r-- 1 root root 478777 Oct 16 22:04 mariadb_backup_sql
#将备份拷贝到slave服务器
[root@master ~] scp /data/mariadb_backup_2020-10-18_16\:08\:08.sql 10.0.0.81:/data/
The authenticity of host ‘10.0.0.81 (10.0.0.81)‘ can‘t be established.
ECDSA key fingerprint is SHA256:pWYlWWDNZAyPanC0foRMoATFOGGBma8XydeNm0U1+CI.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added ‘10.0.0.81‘ (ECDSA) to the list of known hosts.
root@10.0.0.81‘s password:
mariadb_backup_2020-10-18_16\:09\:08.sql 100% 468KB 45.1MB/s 00:00
#优化主从节点服务器性能
MariaDB [(none)]> SET GLOBAL innodb_flush_log_at_trx_commit=2;
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> SET GLOBAL sync_binlog= 0;
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> SHOW VARIABLES LIKE ‘sync_binlog‘;
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| sync_binlog | 0 |
+---------------+-------+
1 row in set (0.001 sec)
#将备份还原到从节点：
#安装数据库：
[root@slave1 ~] dnf -y install mariadb-server
#修改配置文件
[root@slave1 ~] vim /etc/my.cnf.d/mariadb-server.cnf
[mysql]
server-id=81
log-bin
read-only
[root@slave1 ~] systemctl restart mariadb.service
配置从节点从备份之后开始复制：
[root@slave1 ~] vim /data/mariadb_backup_2020-10-18_08\:12\:52.sql
CHANGE MASTER TO
MASTER_HOST=‘10.0.0.81‘,
MASTER_USER=‘abc‘,
MASTER_PASSWORD=‘123456‘,
MASTER_PORT=3306,
MASTER_LOG_FILE=‘mariadb-bin.000002‘,
MASTER_LOG_POS=375;
[root@slave1 ~] mysql < /data/mariadb_backup_2020-10-18_12:06\:11.sql
[root@slave1 ~] mysql
MariaDB [(none)]> START SLAVE;
MariaDB [(none)]> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.0.0.8
Master_User: abc
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mariadb-bin.000004
Read_Master_Log_Pos: 389
Relay_Log_File: mariadb-relay-bin.000002
Relay_Log_Pos: 557
Relay_Master_Log_File: mariadb-bin.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 389
Relay_Log_Space: 868
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:
S econds_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: 8
Master_SSL_Crl:
Master_SSL_Crlpath:
Using_Gtid: No
Gtid_IO_Pos:
Replicate_Do_Domain_Ids:
Replicate_Ignore_Domain_Ids:
Parallel_Mode: conservative
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
Slave_DDL_Groups: 0
Slave_Non_Transactional_Groups: 0
Slave_Transactional_Groups: 0
1 row in set (0.000 sec)
2、当master服务器宕机，提升一个slave成为新的master（写出操作步骤）
查询数据库节点最新的为新master
MariaDB [(none)]> show slave status\G
#修改配置文件并关闭read-only配置
[root@slave1 ~] vi /etc/my.cnf.d/mariadb-server.cnf
[mysql]
server-id=81
log-bin
read-only=off
[root@slave1 ~] systemctl restart mariadb.service
#清除旧节点信息
MariaDB [(none)]> set global read_only=off;
MariaDB [(none)]> stop slave;
MariaDB [(none)]> reset slave all;
#备份新master的信息
[root@slave1 ~] mysqldump -A -F --single-transaction --master-data=1> /data/mariadb_backup_`date +%F_%T`.sql
[root@slave1 ~] scp /data/mariadb_backup_2020-10-18_15\:32\:22.sql 10.0.0.82:/data
#其他所有slave还原数据库，指向新master：
[root@slave2 ~] vi /data/mariadb_backup_2020-10-18_11\:33\:25.sql
CHANGE MASTER TO
MASTER_HOST=‘10.0.0.80‘,
MASTER_USER=‘abc‘,
MASTER_PASSWORD=‘123456‘,
MASTER_PORT=3306,
MASTER_LOG_FILE=‘mariadb-bin.000002‘,
MASTER_LOG_POS=389;
MariaDB [(none)]> stop slave;
MariaDB [(none)]> reset slave all;
ariaDB [(none)]> set sql_log_bin=off;
MariaDB [(none)]> source /data/mariadb_backup_2020-10-17_11\:33\:25.sql
MariaDB [(none)]> set sql_log_bin=on;
MariaDB [(none)]> start slave;
3、通过 MHA 0.58 搭建一个数据库集群结构
#给管理端安装mha-manager和mha-node包
[root@mha-manager ~]#yum -y install mha4mysql-node-0.58-0.el7.centos.noarch.rpm
[root@mha-manager ~]#yum -y install mha4mysql-manager-0.58-0.el7.centos.noarch.rpm
#给mysql服务器节点安装mha-node包
[root@master ~]#yum -y install mha4mysql-node-0.58-0.el7.centos.noarch.rpm
[root@slave1 ~]#yum -y install mha4mysql-node-0.58-0.el7.centos.noarch.rpm
[root@slave2 ~]#yum -y install mha4mysql-node-0.58-0.el7.centos.noarch.rpm
#在所有节点之间实现基于key验证
[root@mha-manager ~]#ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Created directory ‘/root/.ssh‘.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:fTNTrKIR3DWJFNW7fUJsCGz/JuKE7QIgfiSjhWrB/Rc root@mha-manager
The key‘s randomart image is:
+---[RSA 2048]----+
| oo++o |
| . .=..o. |
|... o..o oo. |
|.o=.o E o oo= |
|.+.=.. Soo *+ o |
|o.. .....o+o.+= o|
|. . ...+ . o ..|
| . o |
| . |
+----[SHA256]-----+
[root@mha-manager ~]#rsync -av .ssh 10.0.0.8:
root@10.0.0.80‘s password:
sending incremental file list
.ssh/
.ssh/authorized_keys
.ssh/id_rsa
.ssh/id_rsa.pub
.ssh/known_hosts
sent 4,007 bytes received 96 bytes 1,641.20 bytes/sec
total size is 3,670 speedup is 0.89
[root@mha-manager ~]#rsync -av .ssh 10.0.0.18:
root@10.0.0.81‘s password:
sending incremental file list
.ssh/
.ssh/authorized_keys
.ssh/id_rsa
.ssh/id_rsa.pub
.ssh/known_hosts
sent 4,007 bytes received 96 bytes 1,641.20 bytes/sec
total size is 3,670 speedup is 0.89
[root@mha-manager ~]#rsync -av .ssh 10.0.0.28:
root@10.0.0.28‘s password:
sending incremental file list
.ssh/
.ssh/authorized_keys
.ssh/id_rsa
.ssh/id_rsa.pub
.ssh/known_hosts
sent 4,007 bytes received 96 bytes 1,641.20 bytes/sec
total size is 3,670 speedup is 0.89
#在管理节点建立配置文件
[root@mha-manager ~]#mkdir /etc/mastermha/
[root@mha-manager ~]#vim /etc/mastermha/app1.cnf
[server default]
user=mhauser
password=magedu
manager_workdir=/data/mastermha/app1/
manager_log=/data/mastermha/app1/manager.log
remote_workdir=/data/mastermha/app1/
ssh_user=root
repl_user=repluser
repl_password=magedu
ping_interval=1
master_ip_failover_script=/usr/local/bin/master_ip_failover
report_script=/usr/local/bin/sendmail.sh
check_repl_delay=0
master_binlog_dir=/data/mysql/
[server1]
hostname=10.0.0.8
candidate_master=1
[server2]
hostname=10.0.0.18
master
[server3]
hostname=10.0.0.28
candidate_master=1
#相关脚本
[root@mha-manager ~]#vim /usr/local/bin/sendmail.sh
echo "MySQL is down" | mail -s "MHA Warning" 1098182702@qq.com
[root@mha-manager ~]#chmod +x /usr/local/bin/sendmail.sh
[root@mha-manager ~]#vim /usr/local/bin/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 = ‘10.0.0.100/24‘;
my $gateway = ‘10.0.0.2‘;
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";
}
[root@mha-manager ~]#chmod +x /usr/local/bin/master_ip_failover
#配置master
[root@master ~]#mkdir /data/mysql
[root@master ~]#chown mysql.mysql /data/mysql/
[root@master ~]#vim /etc/my.cnf.d/mysql-server.cnf
[mysqld]
server-id=8
log-bin=/data/mysql/mysql-bin
skip_name_resolve=1
general_log
[root@master ~]#systemctl start mysqld.service
[root@master ~]#mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.21 Source distribution
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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 logs;
+------------------+-----------+-----------+
| Log_name | File_size | Encrypted |
+------------------+-----------+-----------+
| mysql-bin.000001 | 179 | No |
| mysql-bin.000002 | 156 | No |
+------------------+-----------+-----------+
2 rows in set (0.00 sec)
mysql> create user repluser@‘10.0.0.%‘ identified by ‘magedu‘;
Query OK, 0 rows affected (0.00 sec)
mysql> grant replication slave on *.* to repluser@‘10.0.0.%‘;
Query OK, 0 rows affected (0.00 sec)
mysql> create user mhauser@‘10.0.0.%‘ identified by ‘magedu‘;
Query OK, 0 rows affected (0.00 sec)
mysql> grant all on *.* to mhauser@‘10.0.0.%‘;
Query OK, 0 rows affected (0.00 sec)
[root@master ~]#ifconfig eth0:1 10.0.0.100/24
#配置slave1
[root@slave1 ~]#mkdir /data/mysql
[root@slave1 ~]#chown mysql.mysql /data/mysql/
[root@slave1 ~]#vim /etc/my.cnf.d/mysql-server.cnf
[mysqld]
server-id=18
log-bin=/data/mysql/mysql-bin
read-only
relay_log_purge=0
skip_name_resolve=1
[root@slave1 ~]#systemctl start mysqld.service
[root@slave1 ~]#mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.21 Source distribution
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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> CHANGE MASTER TO
-> MASTER_HOST=‘10.0.0.8‘,
-> MASTER_USER=‘repluser‘,
-> MASTER_PASSWORD=‘magedu‘,
-> MASTER_LOG_FILE=‘mysql-bin.000002‘,
-> MASTER_LOG_POS=156;
Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.0.0.8
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 1201
Relay_Log_File: slave1-relay-bin.000002
Relay_Log_Pos: 1369
Relay_Master_Log_File: mysql-bin.000002
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: 1201
Relay_Log_Space: 1579
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: 8
Master_UUID: 00db05a9-1074-11eb-abdd-000c2980df3c
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
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
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set (0.00 sec)
#配置slave2
[root@slave2 ~]#mkdir /data/mysql
[root@slave2 ~]#chown mysql.mysql /data/mysql
[root@slave2 ~]#vim /etc/my.cnf.d/mysql-server.cnf
[mysqld]
server-id=28
log-bin=/data/mysql/mysql-bin
read-only
relay_log_purge=0
skip_name_resolve=1
[root@slave2 ~]#systemctl start mysqld.service
[root@slave2 ~]#mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.21 Source distribution
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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>
mysql> CHANGE MASTER TO
-> MASTER_HOST=‘10.0.0.8‘,
-> MASTER_USER=‘repluser‘,
-> MASTER_PASSWORD=‘magedu‘,
-> MASTER_LOG_FILE=‘mysql-bin.000002‘,
-> MASTER_LOG_POS=156;
Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.0.0.8
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 1201
Relay_Log_File: slave2-relay-bin.000002
Relay_Log_Pos: 1369
Relay_Master_Log_File: mysql-bin.000002
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: 1201
Relay_Log_Space: 1579
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: 8
Master_UUID: 00db05a9-1074-11eb-abdd-000c2980df3c
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
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
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set (0.00 sec)
#检查管理端环境
[root@mha-manager ~]#masterha_check_ssh --conf=/etc/mastermha/app1.cnf
Sat Oct 17 12:37:11 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Oct 17 12:37:11 2020 - [info] Reading application default configuration from /etc/mastermha/app1.cnf..
Sat Oct 17 12:37:11 2020 - [info] Reading server configuration from /etc/mastermha/app1.cnf..
Sat Oct 17 12:37:11 2020 - [info] Starting SSH connection tests..
Sat Oct 17 12:37:12 2020 - [debug]
Sat Oct 17 12:37:11 2020 - [debug] Connecting via SSH from root@10.0.0.8(10.0.0.8:22) to root@10.0.0.18(10.0.0.18:22)..
Sat Oct 17 12:37:11 2020 - [debug] ok.
Sat Oct 17 12:37:11 2020 - [debug] Connecting via SSH from root@10.0.0.8(10.0.0.8:22) to root@10.0.0.28(10.0.0.28:22)..
Sat Oct 17 12:37:11 2020 - [debug] ok.
Sat Oct 17 12:37:12 2020 - [debug]
Sat Oct 17 12:37:11 2020 - [debug] Connecting via SSH from root@10.0.0.18(10.0.0.18:22) to root@10.0.0.8(10.0.0.8:22)..
Sat Oct 17 12:37:11 2020 - [debug] ok.
Sat Oct 17 12:37:11 2020 - [debug] Connecting via SSH from root@10.0.0.18(10.0.0.18:22) to root@10.0.0.28(10.0.0.28:22)..
Sat Oct 17 12:37:12 2020 - [debug] ok.
Sat Oct 17 12:37:13 2020 - [debug]
Sat Oct 17 12:37:12 2020 - [debug] Connecting via SSH from root@10.0.0.28(10.0.0.28:22) to root@10.0.0.8(10.0.0.8:22)..
Sat Oct 17 12:37:12 2020 - [debug] ok.
Sat Oct 17 12:37:12 2020 - [debug] Connecting via SSH from root@10.0.0.28(10.0.0.28:22) to root@10.0.0.18(10.0.0.18:22)..
Sat Oct 17 12:37:12 2020 - [debug] ok.
Sat Oct 17 12:37:13 2020 - [info] All SSH connection tests passed successfully.
[root@mha-manager ~]#masterha_check_repl --conf=/etc/mastermha/app1.cnf
Sat Oct 17 12:37:43 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Oct 17 12:37:43 2020 - [info] Reading application default configuration from /etc/mastermha/app1.cnf..
Sat Oct 17 12:37:43 2020 - [info] Reading server configuration from /etc/mastermha/app1.cnf..
Sat Oct 17 12:37:43 2020 - [info] MHA::MasterMonitor version 0.58.
Sat Oct 17 12:37:44 2020 - [info] GTID failover mode = 0
Sat Oct 17 12:37:44 2020 - [info] Dead Servers:
Sat Oct 17 12:37:44 2020 - [info] Alive Servers:
Sat Oct 17 12:37:44 2020 - [info] 10.0.0.8(10.0.0.8:3306)
Sat Oct 17 12:37:44 2020 - [info] 10.0.0.18(10.0.0.18:3306)
Sat Oct 17 12:37:44 2020 - [info] 10.0.0.28(10.0.0.28:3306)
Sat Oct 17 12:37:44 2020 - [info] Alive Slaves:
Sat Oct 17 12:37:44 2020 - [info] 10.0.0.18(10.0.0.18:3306) Version=8.0.21 (oldest major version between slaves) log-bin:enabled
Sat Oct 17 12:37:44 2020 - [info] Replicating from 10.0.0.8(10.0.0.8:3306)
Sat Oct 17 12:37:44 2020 - [info] 10.0.0.28(10.0.0.28:3306) Version=8.0.21 (oldest major version between slaves) log-bin:enabled
Sat Oct 17 12:37:44 2020 - [info] Replicating from 10.0.0.8(10.0.0.8:3306)
Sat Oct 17 12:37:44 2020 - [info] Primary candidate for the new Master (candidate_master is set)
Sat Oct 17 12:37:44 2020 - [info] Current Alive Master: 10.0.0.8(10.0.0.8:3306)
Sat Oct 17 12:37:44 2020 - [info] Checking slave configurations..
Sat Oct 17 12:37:44 2020 - [info] Checking replication filtering settings..
Sat Oct 17 12:37:44 2020 - [info] binlog_do_db= , binlog_ignore_db=
Sat Oct 17 12:37:44 2020 - [info] Replication filtering check ok.
Sat Oct 17 12:37:44 2020 - [info] GTID (with auto-pos) is not supported
Sat Oct 17 12:37:44 2020 - [info] Starting SSH connection tests..
Sat Oct 17 12:37:47 2020 - [info] All SSH connection tests passed successfully.
Sat Oct 17 12:37:47 2020 - [info] Checking MHA Node version..
Sat Oct 17 12:37:47 2020 - [info] Version check ok.
Sat Oct 17 12:37:47 2020 - [info] Checking SSH publickey authentication settings on the current master..
Sat Oct 17 12:37:47 2020 - [info] HealthCheck: SSH to 10.0.0.8 is reachable.
Sat Oct 17 12:37:47 2020 - [info] Master MHA Node version is 0.58.
Sat Oct 17 12:37:47 2020 - [info] Checking recovery script configurations on 10.0.0.8(10.0.0.8:3306)..
Sat Oct 17 12:37:47 2020 - [info] Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/data/mysql/ --output_file=/data/mastermha/app1//save_binary_logs_test --manager_version=0.58 --start_file=mysql-bin.000002
Sat Oct 17 12:37:47 2020 - [info] Connecting to root@10.0.0.8(10.0.0.8:22)..
Creating /data/mastermha/app1 if not exists.. Creating directory /data/mastermha/app1.. done.
ok.
Checking output directory is accessible or not..
ok.
Binlog found at /data/mysql/, up to mysql-bin.000002
Sat Oct 17 12:37:48 2020 - [info] Binlog setting check done.
Sat Oct 17 12:37:48 2020 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..
Sat Oct 17 12:37:48 2020 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user=‘mhauser‘ --slave_host=10.0.0.18 --slave_ip=10.0.0.18 --slave_port=3306 --workdir=/data/mastermha/app1/ --target_version=8.0.21 --manager_version=0.58 --relay_dir=/var/lib/mysql --current_relay_log=slave1-relay-bin.000002 --slave_pass=xxx
Sat Oct 17 12:37:48 2020 - [info] Connecting to root@10.0.0.18(10.0.0.18:22)..
Creating directory /data/mastermha/app1/.. done.
Checking slave recovery environment settings..
Relay log found at /var/lib/mysql, up to slave1-relay-bin.000002
Temporary relay log file is /var/lib/mysql/slave1-relay-bin.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 Oct 17 12:37:48 2020 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user=‘mhauser‘ --slave_host=10.0.0.28 --slave_ip=10.0.0.28 --slave_port=3306 --workdir=/data/mastermha/app1/ --target_version=8.0.21 --manager_version=0.58 --relay_dir=/var/lib/mysql --current_relay_log=slave2-relay-bin.000002 --slave_pass=xxx
Sat Oct 17 12:37:48 2020 - [info] Connecting to root@10.0.0.28(10.0.0.28:22)..
Creating directory /data/mastermha/app1/.. done.
Checking slave recovery environment settings..
Relay log found at /var/lib/mysql, up to slave2-relay-bin.000002
Temporary relay log file is /var/lib/mysql/slave2-relay-bin.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 Oct 17 12:37:48 2020 - [info] Slaves settings check done.
Sat Oct 17 12:37:48 2020 - [info]
10.0.0.8(10.0.0.8:3306) (current master)
+--10.0.0.18(10.0.0.18:3306)
+--10.0.0.28(10.0.0.28:3306)
Sat Oct 17 12:37:48 2020 - [info] Checking replication health on 10.0.0.18..
Sat Oct 17 12:37:48 2020 - [info] ok.
Sat Oct 17 12:37:48 2020 - [info] Checking replication health on 10.0.0.28..
Sat Oct 17 12:37:48 2020 - [info] ok.
Sat Oct 17 12:37:48 2020 - [info] Checking master_ip_failover_script status:
Sat Oct 17 12:37:48 2020 - [info] /usr/local/bin/master_ip_failover --command=status --ssh_user=root --orig_master_host=10.0.0.8 --orig_master_ip=10.0.0.8 --orig_master_port=3306
IN SCRIPT TEST====/sbin/ifconfig eth0:1 down==/sbin/ifconfig eth0:1 10.0.0.100/24;/sbin/arping -I
eth0 -c 3 -s 10.0.0.100/24 10.0.0.2 >/dev/null 2>&1===
Checking the Status of the script.. OK
/sbin/arping: option requires an argument -- ‘I‘
Usage: arping [-fqbDUAV] [-c count] [-w timeout] [-I device] [-s source] destination
-f : quit on first reply
-q : be quiet
-b : keep broadcasting, don‘t go unicast
-D : duplicate address detection mode
-U : Unsolicited ARP mode, update your neighbours
-A : ARP answer mode, update your neighbours
-V : print version and exit
-c count : how many packets to send
-w timeout : how long to wait for a reply
-I device : which ethernet device to use
-s source : source ip address
destination : ask for what ip address
Sat Oct 17 12:37:48 2020 - [info] OK.
Sat Oct 17 12:37:48 2020 - [warning] shutdown_script is not defined.
Sat Oct 17 12:37:48 2020 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.
[root@mha-manager ~]#masterha_check_status --conf=/etc/mastermha/app1.cnf
app1 is stopped(2:NOT_RUNNING).
#启动mha
[root@mha-manager ~]#masterha_manager --conf=/etc/mastermha/app1.cnf
Sat Oct 17 12:39:09 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Oct 17 12:39:09 2020 - [info] Reading application default configuration from /etc/mastermha/app1.cnf..
Sat Oct 17 12:39:09 2020 - [info] Reading server configuration from /etc/mastermha/app1.cnf..
[root@master ~]#tail -f /var/lib/mysql/master.log
2020-10-17T12:41:33.799439Z 15 Query SELECT 1 As Value
2020-10-17T12:41:34.800094Z 15 Query SELECT 1 As Value
2020-10-17T12:41:35.800754Z 15 Query SELECT 1 As Value
2020-10-17T12:41:36.802357Z 15 Query SELECT 1 As Value
2020-10-17T12:41:37.802221Z 15 Query SELECT 1 As Value
2020-10-17T12:41:38.802487Z 15 Query SELECT 1 As Value
2020-10-17T12:41:39.803444Z 15 Query SELECT 1 As Value
2020-10-17T12:41:40.804324Z 15 Query SELECT 1 As Value
[root@mha-manager ~]#masterha_check_status --conf=/etc/mastermha/app1.cnf
app1 (pid:12292) is running(0:PING_OK), master:10.0.0.8
#模拟故障
[root@mha-manager ~]#masterha_manager --conf=/etc/mastermha/app1.cnf
Sat Oct 17 12:39:09 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Oct 17 12:39:09 2020 - [info] Reading application default configuration from /etc/mastermha/app1.cnf..
Sat Oct 17 12:39:09 2020 - [info] Reading server configuration from /etc/mastermha/app1.cnf..
Sat Oct 17 12:44:19 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Oct 17 12:44:19 2020 - [info] Reading application default configuration from /etc/mastermha/app1.cnf..
Sat Oct 17 12:44:19 2020 - [info] Reading server configuration from /etc/mastermha/app1.cnf..
[root@mha-manager ~]#
[root@mha-manager ~]#masterha_check_status --conf=/etc/mastermha/app1.cnf
app1 is stopped(2:NOT_RUNNING).
[root@slave2 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:0c:29:5c:a0:c5 brd ff:ff:ff:ff:ff:ff
inet 10.0.0.28/24 brd 10.0.0.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet 10.0.0.100/24 brd 10.0.0.255 scope global secondary eth0:1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe5c:a0c5/64 scope link
valid_lft forever preferred_lft forever4、实战案例：Percona XtraDB Cluster(PXC 5.7）
#配置pxc清华yum源并安装
[root@pxc1 ~]#vim /etc/yum.repos.d/pxc.repo
[percona]
name=percona_repo
baseurl =https://mirrors.tuna.tsinghua.edu.cn/percona/release/$releasever/RPMS/$basearch
enabled = 1
gpgcheck = 0
[root@pxc1 ~]#scp /etc/yum.repos.d/pxc.repo 10.0.0.17:/etc/yum.repos.d/
[root@pxc1 ~]#scp /etc/yum.repos.d/pxc.repo 10.0.0.27:/etc/yum.repos.d/
[root@pxc1 ~]#scp /etc/yum.repos.d/pxc.repo 10.0.0.37:/etc/yum.repos.d/
[root@pxc1 ~]#yum install Percona-XtraDB-Cluster-57 -y
[root@pxc2 ~]#yum install Percona-XtraDB-Cluster-57 -y
[root@pxc3 ~]#yum install Percona-XtraDB-Cluster-57 -y
[root@pxc4 ~]#yum install Percona-XtraDB-Cluster-57 -y
#配置各个节点mysql和集群配置文件
[root@pxc1 ~]#vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
[mysqld]
server-id=7
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
log-bin
log_slave_updates
expire_logs_days=7
[root@pxc2 ~]#vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
[mysqld]
server-id=17
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
log-bin
log_slave_updates
expire_logs_days=7
[root@pxc3 ~]#vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
[mysqld]
server-id=27
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
log-bin
log_slave_updates
expire_logs_days=7
[root@pxc4 ~]#vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
[mysqld]
server-id=37
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
log-bin
log_slave_updates
expire_logs_days=7
[root@pxc1 ~]#vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[root@pxc1 ~]#grep -Ev "^#|^$" /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[mysqld]
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so
wsrep_cluster_address=gcomm://10.0.0.7,10.0.0.17,10.0.0.27
binlog_format=ROW
default_storage_engine=InnoDB
wsrep_slave_threads= 8
wsrep_log_conflicts
innodb_autoinc_lock_mode=2
wsrep_node_address=10.0.0.7
wsrep_cluster_name=pxc-cluster
wsrep_node_name=pxc-cluster-node-1
pxc_strict_mode=ENFORCING
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
[root@pxc2 ~]#vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[root@pxc2 ~]#
[root@pxc2 ~]#grep -Ev "^#|^$" /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[mysqld]
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so
wsrep_cluster_address=gcomm://10.0.0.7,10.0.0.17,10.0.0.27
binlog_format=ROW
default_storage_engine=InnoDB
wsrep_slave_threads= 8
wsrep_log_conflicts
innodb_autoinc_lock_mode=2
wsrep_node_address=10.0.0.17
wsrep_cluster_name=pxc-cluster
wsrep_node_name=pxc-cluster-node-2
pxc_strict_mode=ENFORCING
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
[root@pxc3 ~]#vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[root@pxc3 ~]#grep -Ev "^#|^$" /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[mysqld]
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so
wsrep_cluster_address=gcomm://10.0.0.7,10.0.0.17,10.0.0.27
binlog_format=ROW
default_storage_engine=InnoDB
wsrep_slave_threads= 8
wsrep_log_conflicts
innodb_autoinc_lock_mode=2
wsrep_node_address=10.0.0.27
wsrep_cluster_name=pxc-cluster
wsrep_node_name=pxc-cluster-node-3
pxc_strict_mode=ENFORCING
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
#启动PXC集群中第一个节点
[root@pxc1 ~]#systemctl start mysql@bootstrap.service
[root@pxc1 ~]#ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
LISTEN 0 128 *:4567 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 100 [::1]:25 [::]:*
LISTEN 0 80 [::]:3306 [::]:*
[root@pxc1 ~]#grep "temporary password" /var/log/mysqld.log
2020-10-17T06:59:53.765387Z 1 [Note] A temporary password is generated for root@localhost: Vkyf+nVci9wW
[root@pxc1 ~]#mysql -uroot -pVkyf+nVci9wW
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.7.31-34-57-log
Copyright (c) 2009-2020 Percona LLC and/or its affiliates
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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> alter user root@‘localhost‘ identified by ‘magedu‘;
Query OK, 0 rows affected (0.00 sec)
mysql> grant reload,lock tables,process,replication client on *.* to sstuser@‘localhost‘ identified by ‘s3cretPass‘;
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> show variables like ‘wsrep%‘\G
*************************** 1. row ***************************
Variable_name: wsrep_OSU_method
Value: TOI
*************************** 2. row ***************************
Variable_name: wsrep_RSU_commit_timeout
Value: 5000
*************************** 3. row ***************************
Variable_name: wsrep_auto_increment_control
Value: ON
*************************** 4. row ***************************
Variable_name: wsrep_causal_reads
Value: OFF
*************************** 5. row ***************************
Variable_name: wsrep_certification_rules
Value: strict
*************************** 6. row ***************************
Variable_name: wsrep_certify_nonPK
Value: ON
*************************** 7. row ***************************
Variable_name: wsrep_cluster_address
Value: gcomm://10.0.0.7,10.0.0.17,10.0.0.27
*************************** 8. row ***************************
Variable_name: wsrep_cluster_name
Value: pxc-cluster
*************************** 9. row ***************************
Variable_name: wsrep_convert_LOCK_to_trx
Value: OFF
*************************** 10. row ***************************
Variable_name: wsrep_data_home_dir
Value: /var/lib/mysql/
*************************** 11. row ***************************
Variable_name: wsrep_dbug_option
Value:
*************************** 12. row ***************************
Variable_name: wsrep_debug
Value: OFF
*************************** 13. row ***************************
Variable_name: wsrep_desync
Value: OFF
*************************** 14. row ***************************
Variable_name: wsrep_dirty_reads
Value: OFF
*************************** 15. row ***************************
Variable_name: wsrep_drupal_282555_workaround
Value: OFF
*************************** 16. row ***************************
Variable_name: wsrep_forced_binlog_format
Value: NONE
*************************** 17. row ***************************
Variable_name: wsrep_load_data_splitting
Value: ON
*************************** 18. row ***************************
Variable_name: wsrep_log_conflicts
Value: ON
*************************** 19. row ***************************
Variable_name: wsrep_max_ws_rows
Value: 0
*************************** 20. row ***************************
Variable_name: wsrep_max_ws_size
Value: 2147483647
*************************** 21. row ***************************
Variable_name: wsrep_node_address
Value: 10.0.0.7
*************************** 22. row ***************************
Variable_name: wsrep_node_incoming_address
Value: AUTO
*************************** 23. row ***************************
Variable_name: wsrep_node_name
Value: pxc-cluster-node-1
*************************** 24. row ***************************
Variable_name: wsrep_notify_cmd
Value:
*************************** 25. row ***************************
Variable_name: wsrep_on
Value: ON
*************************** 26. row ***************************
Variable_name: wsrep_preordered
Value: OFF
*************************** 27. row ***************************
Variable_name: wsrep_provider
Value: /usr/lib64/galera3/libgalera_smm.so
*************************** 28. row ***************************
Variable_name: wsrep_provider_options
Value: base_dir = /var/lib/mysql/; base_host = 10.0.0.7; base_port = 4567; cert.log_conflicts = no; cert.optimistic_pa = yes; debug = no; evs.auto_evict = 0; evs.causal_keepalive_period = PT1S; evs.debug_log_mask = 0x1; evs.delay_margin = PT1S; evs.delayed_keep_period = PT30S; evs.inactive_check_period = PT0.5S; evs.inactive_timeout = PT15S; evs.info_log_mask = 0; evs.install_timeout = PT7.5S; evs.join_retrans_period = PT1S; evs.keepalive_period = PT1S; evs.max_install_timeouts = 3; evs.send_window = 10; evs.stats_report_period = PT1M; evs.suspect_timeout = PT5S; evs.use_aggregate = true; evs.user_send_window = 4; evs.version = 0; evs.view_forget_timeout = P1D; gcache.dir = /var/lib/mysql/; gcache.freeze_purge_at_seqno = -1; gcache.keep_pages_count = 0; gcache.keep_pages_size = 0; gcache.mem_size = 0; gcache.name = /var/lib/mysql//galera.cache; gcache.page_size = 128M; gcache.recover = no; gcache.size = 128M; gcomm.thread_prio = ; gcs.fc_debug = 0; gcs.fc_factor = 1; gcs.fc_limit = 100; gcs.fc_master_slave = no; gcs
*************************** 29. row ***************************
Variable_name: wsrep_recover
Value: OFF
*************************** 30. row ***************************
Variable_name: wsrep_reject_queries
Value: NONE
*************************** 31. row ***************************
Variable_name: wsrep_replicate_myisam
Value: OFF
*************************** 32. row ***************************
Variable_name: wsrep_restart_slave
Value: OFF
*************************** 33. row ***************************
Variable_name: wsrep_retry_autocommit
Value: 1
*************************** 34. row ***************************
Variable_name: wsrep_slave_FK_checks
Value: ON
*************************** 35. row ***************************
Variable_name: wsrep_slave_UK_checks
Value: OFF
*************************** 36. row ***************************
Variable_name: wsrep_slave_threads
Value: 8
*************************** 37. row ***************************
Variable_name: wsrep_sst_auth
Value: ********
*************************** 38. row ***************************
Variable_name: wsrep_sst_donor
Value:
*************************** 39. row ***************************
Variable_name: wsrep_sst_donor_rejects_queries
Value: OFF
*************************** 40. row ***************************
Variable_name: wsrep_sst_method
Value: xtrabackup-v2
*************************** 41. row ***************************
Variable_name: wsrep_sst_receive_address
Value: AUTO
*************************** 42. row ***************************
Variable_name: wsrep_start_position
Value: 00000000-0000-0000-0000-000000000000:-1
*************************** 43. row ***************************
Variable_name: wsrep_sync_wait
Value: 0
43 rows in set (0.00 sec)
mysql> show status like ‘wsrep%‘;
+----------------------------------+--------------------------------------+
| Variable_name | Value |
+----------------------------------+--------------------------------------+
| wsrep_local_state_uuid | 6085b686-1046-11eb-ac84-631f2cc73305 |
| wsrep_protocol_version | 9 |
| wsrep_last_applied | 3 |
| wsrep_last_committed | 3 |
| wsrep_replicated | 3 |
| wsrep_replicated_bytes | 816 |
| wsrep_repl_keys | 3 |
| wsrep_repl_keys_bytes | 96 |
| wsrep_repl_data_bytes | 521 |
| wsrep_repl_other_bytes | 0 |
| wsrep_received | 2 |
| wsrep_received_bytes | 150 |
| wsrep_local_commits | 0 |
| wsrep_local_cert_failures | 0 |
| wsrep_local_replays | 0 |
| wsrep_local_send_queue | 0 |
| wsrep_local_send_queue_max | 1 |
| wsrep_local_send_queue_min | 0 |
| wsrep_local_send_queue_avg | 0.000000 |
| wsrep_local_recv_queue | 0 |
| wsrep_local_recv_queue_max | 2 |
| wsrep_local_recv_queue_min | 0 |
| wsrep_local_recv_queue_avg | 0.500000 |
| wsrep_local_cached_downto | 1 |
| wsrep_flow_control_paused_ns | 0 |
| wsrep_flow_control_paused | 0.000000 |
| wsrep_flow_control_sent | 0 |
| wsrep_flow_control_recv | 0 |
| wsrep_flow_control_interval | [ 100, 100 ] |
| wsrep_flow_control_interval_low | 100 |
| wsrep_flow_control_interval_high | 100 |
| wsrep_flow_control_status | OFF |
| wsrep_cert_deps_distance | 1.000000 |
| wsrep_apply_oooe | 0.000000 |
| wsrep_apply_oool | 0.000000 |
| wsrep_apply_window | 1.000000 |
| wsrep_commit_oooe | 0.000000 |
| wsrep_commit_oool | 0.000000 |
| wsrep_commit_window | 1.000000 |
| wsrep_local_state | 4 |
| wsrep_local_state_comment | Synced |
| wsrep_cert_index_size | 1 |
| wsrep_cert_bucket_count | 22 |
| wsrep_gcache_pool_size | 2256 |
| wsrep_causal_reads | 0 |
| wsrep_cert_interval | 0.000000 |
| wsrep_open_transactions | 0 |
| wsrep_open_connections | 0 |
| wsrep_ist_receive_status | |
| wsrep_ist_receive_seqno_start | 0 |
| wsrep_ist_receive_seqno_current | 0 |
| wsrep_ist_receive_seqno_end | 0 |
| wsrep_incoming_addresses | 10.0.0.7:3306 |
| wsrep_cluster_weight | 1 |
| wsrep_desync_count | 0 |
| wsrep_evs_delayed | |
| wsrep_evs_evict_list | |
| wsrep_evs_repl_latency | 0/0/0/0/0 |
| wsrep_evs_state | OPERATIONAL |
| wsrep_gcomm_uuid | 60853201-1046-11eb-b428-d757c0543d63 |
| wsrep_cluster_conf_id | 1 |
| wsrep_cluster_size | 1 |
| wsrep_cluster_state_uuid | 6085b686-1046-11eb-ac84-631f2cc73305 |
| wsrep_cluster_status | Primary |
| wsrep_connected | ON |
| wsrep_local_bf_aborts | 0 |
| wsrep_local_index | 0 |
| wsrep_provider_name | Galera |
| wsrep_provider_vendor | Codership Oy <info@codership.com> |
| wsrep_provider_version | 3.45(ra60e019) |
| wsrep_ready | ON |
+----------------------------------+--------------------------------------+
71 rows in set (0.00 sec)
#启动PXC集群中其它所有节点
[root@pxc2 ~]#systemctl start mysql
[root@pxc2 ~]#ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
LISTEN 0 128 *:4567 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 80 [::]:3306 [::]:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 100 [::1]:25 [::]:*
[root@pxc3 ~]#systemctl start mysql
[root@pxc3 ~]#ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
LISTEN 0 128 *:4567 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 80 [::]:3306 [::]:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 100 [::1]:25 [::]:*
#查看集群状态，验证集群是否成功
[root@pxc1 ~]#mysql -uroot -pmagedu
mysql> show variables like ‘wsrep_node_name‘;
+-----------------+--------------------+
| Variable_name | Value |
+-----------------+--------------------+
| wsrep_node_name | pxc-cluster-node-1 |
+-----------------+--------------------+
1 row in set (0.00 sec)
mysql> show variables like ‘wsrep_node_address‘;
+--------------------+----------+
| Variable_name | Value |
+--------------------+----------+
| wsrep_node_address | 10.0.0.7 |
+--------------------+----------+
1 row in set (0.00 sec)
mysql> show variables like ‘wsrep_on‘;
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| wsrep_on | ON |
+---------------+-------+
1 row in set (0.01 sec)
mysql> show status like ‘wsrep_cluster_size‘;
+--------------------+-------+
| Variable_name | Value |
+--------------------+-------+
| wsrep_cluster_size | 3 |
+--------------------+-------+
1 row in set (0.00 sec)
[root@pxc2 ~]#mysql -uroot -pmagedu
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 14
Server version: 5.7.31-34-57-log Percona XtraDB Cluster (GPL), Release rel34, Revision 7359e4f, WSREP version 31.45, wsrep_31.45
Copyright (c) 2009-2020 Percona LLC and/or its affiliates
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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 databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
[root@pxc3 ~]#mysql -uroot -pmagedu
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.7.31-34-57-log Percona XtraDB Cluster (GPL), Release rel34, Revision 7359e4f, WSREP version 31.45, wsrep_31.45
Copyright (c) 2009-2020 Percona LLC and/or its affiliates
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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> create database db1;
Query OK, 1 row affected (0.00 sec)
[root@pxc1 ~]#mysql -uroot -pmagedu
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 16
Server version: 5.7.31-34-57-log Percona XtraDB Cluster (GPL), Release rel34, Revision 7359e4f, WSREP version 31.45, wsrep_31.45
Copyright (c) 2009-2020 Percona LLC and/or its affiliates
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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 databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| db1 |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.00 sec)
##在PXC集群中再加一台新的主机PXC4：10.0.0.37
[root@pxc4 ~]#vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[root@pxc4 ~]#grep -Ev "^#|^$" /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[mysqld]
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so
wsrep_cluster_address=gcomm://10.0.0.7,10.0.0.17,10.0.0.27,10.0.0.37
binlog_format=ROW
default_storage_engine=InnoDB
wsrep_slave_threads= 8
wsrep_log_conflicts
innodb_autoinc_lock_mode=2
wsrep_node_address=10.0.0.37
wsrep_cluster_name=pxc-cluster
wsrep_node_name=pxc-cluster-node-4
pxc_strict_mode=ENFORCING
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
[root@pxc4 ~]#systemctl start mysql
[root@pxc4 ~]#mysql -uroot -pmagedu
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.7.31-34-57-log Percona XtraDB Cluster (GPL), Release rel34, Revision 7359e4f, WSREP version 31.45, wsrep_31.45
Copyright (c) 2009-2020 Percona LLC and/or its affiliates
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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 status like ‘wsrep_cluster_size‘;
+--------------------+-------+
| Variable_name | Value |
+--------------------+-------+
| wsrep_cluster_size | 4 |
+--------------------+-------+
1 row in set (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| db1 |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.00 sec)
#修改其他节点的配置文件
[root@pxc1 ~]#vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[root@pxc1 ~]#grep -E "^wsrep_cluster_address=gcomm:" /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
wsrep_cluster_address=gcomm://10.0.0.7,10.0.0.17,10.0.0.27,10.0.0.37
[root@pxc2 ~]#grep -E "^wsrep_cluster_address=gcomm:" /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
wsrep_cluster_address=gcomm://10.0.0.7,10.0.0.17,10.0.0.27,10.0.0.37
[root@pxc3 ~]#grep -E "^wsrep_cluster_address=gcomm:" /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
wsrep_cluster_address=gcomm://10.0.0.7,10.0.0.17,10.0.0.27,10.0.0.375、通过 ansible 部署二进制 mysql 8
#安装ansible并配置
[root@ansible ~]#yum -y install ansible
[root@ansible ~]#vim /etc/ansible/hosts
[dbservers]
10.0.0.18
[root@ansible ~]#ansible dbservers --list-hosts
hosts (1):
10.0.0.18
[root@ansible ~]#ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:LqM4c9HgY483iuh1Qrvit92VT9c17QuRh96phKjLKmk root@ansible
The key‘s randomart image is:
+---[RSA 3072]----+
| |
| |
| |
| . o .|
| o o S + oo|
| . * .. o o =.+|
| =.*o .+ o = +.|
| o+EB.*oo o o o .|
|+o**==.*. . . . |
+----[SHA256]-----+
[root@ansible ~]#
[root@ansible ~]#ssh-copy-id 10.0.0.18:
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@10.0.0.18‘s password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh ‘10.0.0.18‘"
and check to make sure that only the key(s) you wanted were added.
#创建二进制安装所需的文件
[root@ansible ~]#mkdir -p /data/ansible/files
[root@ansible ~]#ll /data/ansible/files/
total 473708
-rw-r--r-- 1 root root 485074552 Jul 30 16:48 mysql-8.0.19-linux-glibc2.12-x86_64.tar.xz
[root@ansible ~]#vim /data/ansible/files/my.cnf
[mysqld]
datadir=/data/mysql
skip_name_resolve=1
socket=/tmp/mysql.sock
log-error=/data/mysql/mysql.log
pid-file=/data/mysql/mysql.pid
[client]
port=3306
socket=/tmp/mysql.sock
[mysqld_safe]
vim /data/ansible/files/secure_mysql.sh
#!/bin/bash
#!/bin/bash
passwd=`grep "temporary password" /data/mysql/mysql.log|sed -nr ‘s/^.*\: (.*)$/\1/p‘`
mysqladmin -uroot -p`echo $passwd` password magedu
expect <<EOF
spawn /usr/local/mysql/bin/mysql_secure_installation
expect {
"Enter password for user root:" {send magedu\n;exp_continue}
"Press y|Y for Yes, any other key for No:" {send n\n;exp_continue}
"Press y|Y for Yes, any other key for No" {send y\n;exp_continue}
"Press y|Y for Yes, any other key for No" {send y\n;exp_continue}
"Press y|Y for Yes, any other key for No" {send y\n;exp_continue}
"Press y|Y for Yes, any other key for No" {send y\n;exp_continue}
}
expect eof
EOF
[root@ansible ~]#tree /data/ansible/files/
/data/ansible/files/
├── my.cnf
├── mysql-8.0.19-linux-glibc2.12-x86_64.tar.xz
└── secure_mysql.sh
0 directories, 3 files
[root@ansible ~]#vim /data/ansible/install_mysql.yml
---
#insatll mysql-8.0.19-linux-glibc2.12-x86_64.tar.xz
- hosts: dbservers
remote_user: root
gather_facts: no
tasks:
- name: istall packages
yum: name=mysql,libaio,perl-Data-Dumper,perl-Getopt-Long,expect,ncurses-compat-libs
- name: create mysql group
group: name=mysql gid=306
- name: create mysql user
user: name=mysql uid=306 group=mysql shell=/sbin/nologin system=yes create_home=no home=/data/mysql
- name: copy tar to remote host and file mode
unarchive: src=/data/ansible/files/mysql-8.0.19-linux-glibc2.12-x86_64.tar.xz dest=/usr/local/ owner=root group=root
- name: create linkfile /usr/local/mysql
file: src=/usr/local/mysql-8.0.19-linux-glibc2.12-x86_64 dest=/usr/local/mysql state=link
- name: PATH variable
shell: echo ‘PATH=/usr/local/mysql/bin:$PATH‘ > /etc/profile.d/mysql.sh;source /etc/profile.d/mysql.sh
- name: config my.cnf
copy: src=/data/ansible/files/my.cnf dest=/etc/my.cnf
- name: data dir
shell: mysqld --initialize --user=mysql --datadir=/data/mysql
tags: data
- name: service script
shell: /bin/cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
- name: enable service
shell: /etc/init.d/mysqld start;chkconfig --add mysqld;chkconfig mysqld on
tags: service
- name: secure script
script: /data/ansible/files/secure_mysql.sh
tags: script
#执行mysql.yml
[root@ansible ~]#ansible-playbook /data/ansible/install_mysql.yml
PLAY [dbservers] ***************************************************************************
TASK [istall packages] *********************************************************************
changed: [10.0.0.18]
TASK [create mysql group] ******************************************************************
changed: [10.0.0.18]
TASK [create mysql user] *******************************************************************
changed: [10.0.0.18]
TASK [copy tar to remote host and file mode] ***********************************************
changed: [10.0.0.18]
TASK [create linkfile /usr/local/mysql] ****************************************************
changed: [10.0.0.18]
TASK [PATH variable] ***********************************************************************
changed: [10.0.0.18]
TASK [config my.cnf] ***********************************************************************
changed: [10.0.0.18]
TASK [data dir] ****************************************************************************
changed: [10.0.0.18]
TASK [service script] **********************************************************************
changed: [10.0.0.18]
TASK [enable service] **********************************************************************
changed: [10.0.0.18]
TASK [secure script] ***********************************************************************
changed: [10.0.0.18]
PLAY RECAP *********************************************************************************
10.0.0.18 : ok=11 changed=11 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
#验证被管理端结果
[root@dbserver ~]#mysql -uroot -pmagedu
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 8.0.19 MySQL Community Server - GPL
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is 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>,如果主节点已经运行了一段时间，且有大量数据时，如何配置并启动slave节点
标签：usr new recover mtu ash perm back ups ansi
原文地址：https://blog.51cto.com/13887323/2542400
