MariaDB+gelera HA
环境信息
centos 7.2.1511
版本信息
MariaDB 10.1.19-client
MariaDB 10.1.19-common
MariaDB 10.1.19-server
安装mariadb
yum install MariaDB-serverMariaDB-client
测试mysql是否正常
Service mysql start
Service mysql stop
创建mysql数据存放目录并授权
mkdir -p /data
chown -R mysql.mysql /data
删除存在的数据库文件
rm -rf /var/lib/mysql/*
修改/etc/my.cnf
[mysqld]
binlog_format=ROW
bind-address = 172.16.16.1
collation-server = utf8_general_ci
character-set-server = utf8
default_storage_engine=innodb
datadir = /data
max_connections = 4096
pid-file = /data/mysql/mysql.pid
query_cache_size=0
socket = /tmp/mysql.sock
#*Innodb setting
#
innodb_file_per_table
innodb_autoinc_lock_mode=2
innodb_flush_log_at_trx_commit=0
innodb_buffer_pool_size=256M
初始化数据库
mysql_install_db
重新启动数据库
service mysql start
创建链接文件
ln -s /tmp/mysql.sock /var/lib/mysql/
安全安装
mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THISSCRIPT IS RECOMMENDED FOR ALL MariaDB
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MariaDB tosecure it, we‘ll need the current
password for the root user. If you‘ve just installed MariaDB, and
you haven‘t set the root passwordyet, the password will be blank,
so you should just press enterhere.
Enter current password for root(enter for none):
OK, successfully used password,moving on...
Setting the root password ensuresthat nobody can log into the MariaDB
root user without the properauthorisation.
Set root password? [Y/n] Y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!
By default, a MariaDB installationhas an anonymous user, allowing anyone
to log into MariaDB without havingto have a user account created for
them. This is intended only for testing, and tomake the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] Y
... Success!
Normally, root should only beallowed to connect from ‘localhost‘. This
ensures that someone cannot guess atthe root password from the network.
Disallow root login remotely?[Y/n] n
... skipping.
By default, MariaDB comes with adatabase named ‘test‘ that anyone can
access. This is also intended only for testing, andshould be removed
before moving into a productionenvironment.
Remove test database and access toit? [Y/n] y
- Dropping test database...
... Success!
- Removing privileges on test database...
... Success!
Reloading the privilege tableswill ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n]y
... Success!
Cleaning up...
All done! If you‘ve completed all of the above steps,your MariaDB
installation should now be secure.
Thanks for using MariaDB!
创建同步用户
grant all privileges on *.* to ‘wsrep_user‘@‘controller2‘ identified by‘wsreppasswd‘;
flush privileges;
更新gelera下wsrep信息
编辑/etc/my.cnf.d/server.cnf
[galera]
wsrep_on=ON
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_cluster_address=gcomm://
wsrep_cluster_name=‘dbcluster‘
wsrep_node_address=‘172.16.16.1‘
wsrep_sst_method=rsync
#wsrep_sst_method=xtrabackup
wsrep_sst_auth=wsrep_user:wsreppasswd
wsrep_node_name=‘HA-1‘
wsrep_node_address=172.16.16.1
wsrep_provider_options="pc.recovery=TRUE;gcache.size=300M"
此时没有同步对象，所以wsrep_cluster_address=gcomm://留空
启动节点
sudo -u mysql mysqld --wsrep-cluster-address=‘gcomm://‘
首先配置节点2
使用1的配置文件直接复制后，修改信息
[mysqld]
bind-address = 172.16.16.2
[gelera]
wsrep_cluster_address=gcomm://172.16.16.1
wsrep_node_address=‘172.16.16.2‘
wsrep_node_name=‘HA-2‘
wsrep_node_address=172.16.16.2
此时数据同步方向为2同步1
启动节点2上的服务
同步完成后
关闭节点1服务
service mysql stop
修改同步对象wsrep_cluster_address=gcomm://172.16.16.2
重启服务后，双向同步完成，验证服务
MariaDB
[(none)]>show global status like ‘wsrep_cluster%‘;
从此处可以看出当有其他节点加入到集群中时，wsrep_cluster_size可以反映出当前集群节点数量，wsrep_cluster_status可以判定当前节点属于primary还是slave
GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘%‘ WITH GRANT OPTION;
GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘‘ WITH GRANT OPTION;
mysqladmin flush-hosts -h172.16.16.1 -P3306 -uroot -pdftcpass
mysql -uroot -h172.16.16.10 -P3307 -pdftcpass