1.9. MySQL Router

1.9.1. 安裝 MySQL Router

# yum install mysql-router -y

MySQL Router 軟體包中所含的檔案。

[root@netkiller ~]# rpm -ql mysql-router-2.0.3-1.el7
/etc/mysqlrouter
/etc/mysqlrouter/mysqlrouter.ini
/usr/lib/systemd/system/mysqlrouter.service
/usr/lib/tmpfiles.d/mysqlrouter.conf
/usr/lib64/libmysqlharness.so
/usr/lib64/libmysqlharness.so.0
/usr/lib64/libmysqlrouter.so
/usr/lib64/libmysqlrouter.so.1
/usr/lib64/mysqlrouter
/usr/lib64/mysqlrouter/fabric_cache.so
/usr/lib64/mysqlrouter/keepalive.so
/usr/lib64/mysqlrouter/logger.so
/usr/lib64/mysqlrouter/mysql_protocol.so
/usr/lib64/mysqlrouter/routing.so
/usr/sbin/mysqlrouter
/usr/share/doc/mysql-router-2.0.3
/usr/share/doc/mysql-router-2.0.3/License.txt
/usr/share/doc/mysql-router-2.0.3/README.txt
/var/log/mysqlrouter
/var/run/mysqlrouter
 

1.9.2. 配置 MySQL Router

預設配置

# cat /etc/mysqlrouter/mysqlrouter.ini
# Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

#
# MySQL Router configuration file
#
# Documentation is available at
#    http://dev.mysql.com/doc/mysql-router/en/

[DEFAULT]
logging_folder = /var/log/mysqlrouter/
plugin_folder = /usr/lib64/mysqlrouter
runtime_folder = /var/run/mysqlrouter
config_folder = /etc/mysqlrouter

[logger]
level = info

# If no plugin is configured which starts a service, keepalive
# will make sure MySQL Router will not immediately exit. It is
# safe to remove once Router is configured.
[keepalive]
interval = 60
 

1.9.2.1. 主備配置

適用於 MySQL Master-Master / Master-Slave 方案，當一臺Master出現故障後另一臺Master或者Slave接管

[routing:failover]
bind_address = 192.168.0.5
bind_port = 3306
max_connections = 1024
mode = read-write
destinations = 192.168.0.10:3306,192.168.0.11:3306

1.9.2.2. 負載均衡配置

主要用於輸在均衡

[routing:balancing]
bind_address = 192.168.0.5
bind_port = 3307
connect_timeout = 3
max_connections = 1024
mode = read-only
destinations = 192.168.0.20:3306,192.168.0.21:3310
 

1.9.3. MySQL Router ， Haproxy，LVS 的選擇

MySQL Router目前仍在成長中，如果你只需要負載均衡與主備，那麼LVS效能更高，Haproxy也更成熟。

節選擇《Netkiller MySQL 手札》