编写自定义systemctl脚本启动进程，卡顿了

查询进程状态时，显示

[root@VM67-redhat7 sfy]# systemctl status simple
● simple.service - sfy test
   Loaded: loaded (/usr/lib/systemd/system/simple.service; disabled; vendor preset: disabled)
   Active: activating (start) since Tue 2018-08-21 22:04:31 CST; 19s ago
  Control: 28287 (bash)
   CGroup: /system.slice/simple.service
           ├─28287 /usr/bin/bash -c /home/sfy/sfy.sh
           └─28329 sleep 1

Aug 21 22:04:31 VM67-redhat7.2 systemd[1]: Starting sfy test...

经查找资料发现simple.service脚本存在一些问题，type类型存在问题，现将正确的脚本，2种方式贴在下面
simple.service

[Unit]
Description=sfy test
After=syslog.target network.target

[Service]
Type=simple
ExecStart=/usr/bin/bash -c "/home/sfy/simple.sh"

[Install]
WantedBy=multi-user.target

simple.sh

while :
do
echo `date` >> /home/sfy/log
sleep 1
done

执行启动并查询结果如下

[root@VM67-redhat7 system]# systemctl start simple
[root@VM67-redhat7 system]# systemctl status simple
● simple.service - sfy test
   Loaded: loaded (/usr/lib/systemd/system/simple.service; disabled; vendor preset: disabled)
   Active: active (running) since Tue 2018-08-21 22:09:25 CST; 10s ago
 Main PID: 28927 (bash)
   CGroup: /system.slice/simple.service
           ├─28927 /usr/bin/bash -c /home/sfy/simple.sh
           └─28949 sleep 1

Aug 21 22:09:25 VM67-redhat7.2 systemd[1]: Started sfy test.
Aug 21 22:09:25 VM67-redhat7.2 systemd[1]: Starting sfy test...

第二种方式 fork.service

[Unit]
Description=sfy test
After=syslog.target network.target

[Service]
Type=forking
ExecStart=/usr/bin/bash -c "/home/sfy/fork.sh"
PrivateTmp=true
SuccessExitStatus=143

fork.sh

echo `date` >> /home/sfy/log
sleep 1

systemctl脚本放在 /usr/lib/systemd/system 目录下，生效执行 systemctl daemon-reload 命令
总结：主要是service脚本中Type参数设置不同导致的（脚本是否循环）