分布式架構(gòu)中應(yīng)用廣泛

1 端口和目錄

rm -rf /data/mysql/data_{3307,3308,3309}
mkdir -p /data/mysql/data_{3307,3308,3309} 

2. 配置文件準(zhǔn)備

cat > /data/mysql/my3307.cnf <<EOF
[mysqld]
user=mysql
port=3307
basedir=/usr/local/mysql57
datadir=/data/mysql/data_3307
server_id=7
socket=/tmp/mysql3307.sock
EOF
cat > /data/mysql/my3308.cnf <<EOF
[mysqld]
user=mysql
port=3308
basedir=/usr/local/mysql57
datadir=/data/mysql/data_3308
server_id=8
socket=/tmp/mysql3308.sock
EOF
cat > /data/mysql/my3309.cnf <<EOF
[mysqld]
user=mysql
port=3309
basedir=/usr/local/mysql57
datadir=/data/mysql/data_3309
server_id=9
socket=/tmp/mysql3309.sock
EOF

3. 授權(quán)

[root@db01 ~]# chown -R mysql.mysql /data/

4. 初始化數(shù)據(jù)

mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql57 --datadir=/data/mysql/data_3307
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql57 --datadir=/data/mysql/data_3308
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql57 --datadir=/data/mysql/data_3309

5. 啟動多實例

[root@db01 mysql]# mysqld --defaults-file=/data/mysql/my3307.cnf &
[root@db01 mysql]# mysqld --defaults-file=/data/mysql/my3308.cnf &
[root@db01 mysql]# mysqld --defaults-file=/data/mysql/my3309.cnf &
[root@db01 mysql]# netstat -tulnp

6. 使用 systemd 管理多實例

cat >/etc/systemd/system/mysqld3307.service <<EOF
[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/usr/local/mysql57/bin/mysqld --defaults-file=/data/mysql/my3307.cnf
LimitNOFILE = 5000
EOF

cat >/etc/systemd/system/mysqld3308.service <<EOF
[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/usr/local/mysql57/bin/mysqld --defaults-file=/data/mysql/my3308.cnf
LimitNOFILE = 5000
EOF

cat >/etc/systemd/system/mysqld3309.service <<EOF
[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/usr/local/mysql57/bin/mysqld --defaults-file=/data/mysql/my3309.cnf
LimitNOFILE = 5000
EOF

7.重啟

pkill mysqld  
systemctl start mysqld3307
systemctl start mysqld3308
systemctl start mysqld3309

8.驗證（查看端口）

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