安裝mysqlrouter

建立目錄：
  mkdir -p /etc/mysqlrouter
  cd /etc/mysqlrouter

下載mysql-router
  wget https://cdn.mysql.com/archives/mysql-router/mysql-router-8.0.26-el7-x86_64.tar.gz
  tar -zxvf mysql-router-8.0.26-el7-x86_64.tar.gz 
  mv mysql-router-8.0.26-el7-x86_64 mysql-router

新建配置檔案

vi mysqlrouter.conf

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

[logger]
level = INFO

# 從節點負載均衡配置
[routing:balancing]
# 繫結的IP地址
bind_address=127.0.0.1
# 監聽的埠
bind_port = 7000
# 連線超時時間
connect_timeout = 3
# 最大連線數
max_connections = 1024
# 後端伺服器地址
destinations = 10.252.252.2:3306,10.252.252.3:3306
# 模式:讀還是寫
mode = read-only

# 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
 

新建系統服務

vi /usr/lib/systemd/system/mysqlrouter.service

[Unit]
Description=MySQL Router
After=network.target
After=syslog.target


[Service]
Type=notify
#User=mysqlrouter
#Group=mysqlrouter

User=root
Group=root

# Start main service
ExecStart=/etc/mysqlrouter/mysql-router/bin/mysqlrouter -c /etc/mysqlrouter/mysqlrouter.conf

# Sets open_files_limit
LimitNOFILE = 10000

Restart=on-failure

PrivateTmp=true

[Install]
WantedBy=multi-user.target
 

啟動

systemctl start mysqlrouter
systemctl enable mysqlrouter