systemd 脚本规范

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centos7/debian8(jessie)/fedora latest/suse都试过了~完美啊

[Unit]
Description=mysql rdbms

[Service]
Type=simple
GuessMainPID=yes
ExecStart=/usr/local/mysql/bin/mysqld --defaults-file=/usr/local/mysql/my.cnf
ExecStop=kill /data/mysql/mysql.pid
Restart=systemctl stop mysql && systemctl start mysql

[Install]
WantedBy=multi-user.target

https://zh.opensuse.org/openSUSE:How_to_write_a_systemd_service

Supplement 1 · Feb 3, 2015

修正版(pgsql的)

[Unit]
Description=PostgreSQL-XL Master Node

[Service]
Type=forking
User=pgsql
GuessMainPID=yes
ExecStart=/usr/local/pgxl/bin/pg_ctl -D /data/pg-hma -l /data/pglog/hma start
ExecStop=/usr/local/pgxl/bin/pg_ctl -D /data/pg-hma -l /data/pglog/hma stop
Restart=always

[Install]
WantedBy=multi-user.target

MySQL

systemctl

rdbms

29 replies • 2015-02-04 10:38:02 +08:00

XiaoxiaoPu

Feb 3, 2015

Restart 那一行多余了

cevincheung

Feb 3, 2015

@XiaoxiaoPu 求解，刚接触

XiaoxiaoPu

Feb 3, 2015

@cevincheung 查了一下不是多余，是错了。Restart 是指定当服务结束、终止、超时后是否重新启动，可选的值有 no, on-success, on-failure, on-abnormal, on-watchdog, on-abort, always。至于重启一个服务需要执行哪些命令，不需要特别指定，systemd 会自己判断

XiaoxiaoPu

Feb 3, 2015

@cevincheung 可以看 man systemd.service

cevincheung

Feb 3, 2015

@XiaoxiaoPu 那也没有ExecRestart就是systemd已经自己实现自己去调用stop && start 咩？

XiaoxiaoPu

Feb 3, 2015

@cevincheung 对，甚至你连 ExecStop 那一行也不需要，systemd 根据 Type 来判断如何 stop

cevincheung

Feb 3, 2015

@XiaoxiaoPu
让mysql结束后并没有自己起来啊…… - -#

XiaoxiaoPu

Feb 3, 2015

@cevincheung 什么意思？

cevincheung

Feb 3, 2015

@XiaoxiaoPu restart不是失败自动重启咩？

XiaoxiaoPu

Feb 3, 2015

@cevincheung 要看 restart 后面设置的值，而且这里的失败是指程序意外终止（比如段错误什么的）

cevincheung

Feb 3, 2015

@XiaoxiaoPu 就是systemd不做健康监控。

XiaoxiaoPu

Feb 3, 2015

@cevincheung 默认没有，你可以设置，比如下面这个示例，如果失败，那么 5 秒后重试：

[Unit]
Description=Create AP Service

[Service]
Type=simple
ExecStart=/usr/bin/bash create_ap wifi0 net0 -g 10.12.5.1 -c 7 -w 2 xiaoxiao puxiaoxiao
KillSignal=SIGINT
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

cevincheung

Feb 3, 2015

@XiaoxiaoPu

如果启动成功后进程崩溃重启呢？