1. Write scripts to allow users to choose whether to use mysqldump or xtraback for full backup.
PS3="please select your backup type:";
select type in mysqldump xtraback;do
case $REPLY in
1)
[ -e /data/backup ] || mkdir /data/backup
mysqldump -A --single-transaction -F |gzip > /data/backup/mysqldump_full_backup-$(date '+%Y%m%d-%H%M').sql.gz || (echo 'backup failed!' && exit 2 )
echo 'mysqldump full-backup successfully !'
break
;;
2)
xtrabackup --backup --target-dir=/data/backup/xtra_full_backup-$(date '+%Y%m%d-%H%M') &> /dev/null || (echo 'backup failed!' && exit 2 )
echo 'xtrabackup full-backup successfully !'
break
;;
*)
echo "please input number for your backup type "
esac
done
2. Configure Mysql master-slave synchronization
Main server configuration (192.168.47.154):
1. Modify the configuration file
vim /etc/my.cnf
server-id=1
log-bin=/var/lib/mysql/logbin_tao
2.systemctl restart mariadb
3. Create user
grant replication slave on *.* to'repluser'@'192.168.47.%' identified by'tao'
4. View the binary log
MariaDB [mysql]> show master logs;
+-------------------+-----------+
| Log_name | File_size |
+-------------------+-----------+
| logbin_tao.000001 | 404 |
+------- ------------+-----------+
1 row in set (0.00 sec)
Configuration from the server (192.168.47.101)
1. Modify the configuration file
vim /etc/my.cnf
server-id=2
read-only
2.CHANGE MASTER TO
MASTER_HOST='192.168.47.154',
MASTER_USER='repluser',
MASTER_PASSWORD='tao',
MASTER_PORT=3306,
MASTER_LOG_FILE='logbin_tao.000001,
MASTER_LOG_POS=404;
3.show slave status\G
4.start slave;
3. Use MHA to achieve Mysql high availability
1. Preparation:
1.) 4 hosts
192.168.47.100 (maha-manager)
192.168.47.101 (main server)
192.168.47.102 (slave server)
192.168.47.103 (slave server)
2.) Time synchronization, firewall off/selinux off
2. Installation
centos7_2 [main server 192.168.47.101]
#1. Install the database
yum install mariadb-server -y
#2. Modify the configuration file
/etc/my.cnf
server-id=2
log-bin
ship_name-resolve
systemctl restart mariadb
#3. Create an account
MariaDB [(none)]> grant replication slave on *.* to repluser@'192.168.47.%' identified by 'tao';
MariaDB [(none)]> grant all on *.* to mhauser@'192.168.47.%' identified by 'tao';
View binary log
MariaDB [(none)]> show master logs;
+--------------------+-----------+
| Log_name | File_size |
+--------------------+-----------+
| mariadb-bin.000001 | 534 |
+--------------------+-----------+
1 row in set (0.00 sec)
#4. Install mha4mysql-node-0.56-0.el6.noarch.rpm
yum install mha*.rpm
centos7_3, centos7_4 [from the server 192.168.47.102, 192.168.47.103]
#1. Install the database
yum install mariadb-server -y
#2. Modify the configuration file
/etc/my.cnf
server-id=3
log-bin
read-only
skip_name_resolve
relay_log_purge=0
server-id=4
log-bin
read-only
skip_name_resolve
relay_log_purge=0
systemctl restart mariadb
#3. Execute commands
MariaDB [(none)]> CHANGE MASTER TO
MASTER_HOST='192.168.47.101',
MASTER_USER='repluser',
MASTER_PASSWORD = 'people',
MASTER_PORT=3306,
MASTER_LOG_FILE='mariadb-bin.000001',
MASTER_LOG_POS=245;
Check status
MariaDB [(none)]> show slave status\G
start up
MariaDB [(none)]> start slave;
The slave node has a read-only attribute
MariaDB [(none)]> show variables like 'read_only';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| read_only | ON |
+---------------+-------+
1 row in set (0.06 sec)
#4. Install mha4mysql-node-0.56-0.el6.noarch.rpm
yum install mha*.rpm
maha-manager[192.168.47.100]
#1. Prepare documents
mha4mysql-manager-0.56-0.el6.noarch.rpm
mha4mysql-node-0.56-0.el6.noarch.rpm
#2. Install the software
yum install mha*.rpm [open epel source]
#3. Key-based verification
(1)ssh-keygen
[root@mha-manager ~]#ls -a .ssh
. .. id_rsa id_rsa.pub
(2)ssh-copy-id 192.168.47.100 (the IP of the local computer)
cd .ssh
[root@mha-manager .ssh]#ls
authorized_keys id_rsa id_rsa.pub known_hosts
(3) Copy
scp -r .ssh 192.168.47.101:/root/
scp -r .ssh 192.168.47.102:/root/
scp -r .ssh 192.168.47.103:/root/
(4) Test:
ssh 192.168.47.101
ssh 192.168.47.102
ssh 192.168.47.103
#4. Create a configuration file
mkdir /etc/mha/
vim /etc/mha/app1.cnf
------------------------
[server default]
user=mhauser
password = person
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 = person
ping_interval=1
[server1]
hostname=192.168.47.101
candidate_master=1
[server2]
hostname=192.168.47.102
candidate_master=1
[server3]
hostname=192.168.47.103
#5. Check
masterha_check_ssh --conf=/etc/mha/app1.cnf
masterha_check_repl --conf=/etc/mha/app1.cnf
#6. Start
masterha_manager --conf=/etc/mha/app1.cnf
test
View log
Main server
create databases tao;
create table testlog (id int auto_increment primary key,name char(10),age int default 20);
delimiter $$
create procedure sp_testlog()
begin
declare i int;
set i = 1;
while i <= 100000
do insert into testlog(name,age) values (concat('wang',i),i);
set i = i +1;
end while;
end$$
delimiter ;
call sp_testlog;
Shut down the main service computer directly
View log
View information of the computer that becomes the main server: [192.168.47.102]
Finally, remove the read_only in the configuration file /etc/my.cnf that becomes the main server