通过systemd运行Python脚本

Question

我对编写systemd服务脚本很systemd 。 我一直在关注这个有用的页面来编写自己的页面 。 失败如下。

Centos 7机器中/etc/systemd/system/中的prodKPI.service内容如下

[Unit]
Description=prodKPI: Aggregation logic to compute device availability

[Service]
Type=simple
PermissionsStartOnly=true
User=deployuser
ExecStart = /usr/bin/python /tmp/app1/folder1/file1.py; /usr/bin/python /tmp/folder2/file2.py
Restart=always

[Install]
WantedBy=default.target

创建文件后我遵循的步骤是

systemctl daemon-reload
systemctl enable prodKPI.service

reboot并

# systemctl status prodKPI.service
● prodKPI.service - prodKPI: Aggregation logic to compute device availability
   Loaded: loaded (/etc/systemd/system/prodKPI.service; enabled; vendor preset: disabled)
   Active: failed (Result: start-limit) since Fri 2017-07-21 19:20:41 UTC; 15min ago
  Process: 1190 ExecStart=/usr/bin/python /tmp/app1/folder1/file1.py; /usr/bin/python /tmp/folder2/file2.py (code=exited, status=2)
 Main PID: 1190 (code=exited, status=2)

Jul 21 19:20:41 device-1 systemd[1]: prodKPI.service: main process exited, code=exited, status=2/INVALIDARGUMENT
Jul 21 19:20:41 device-1 systemd[1]: Unit prodKPI.service entered failed state.
Jul 21 19:20:41 device-1 systemd[1]: prodKPI.service failed.
Jul 21 19:20:41 device-1 systemd[1]: prodKPI.service holdoff time over, scheduling restart.
Jul 21 19:20:41 device-1 systemd[1]: start request repeated too quickly for prodKPI.service
Jul 21 19:20:41 device-1 systemd[1]: Failed to start prodKPI.service: Aggregation logic to compute device availability.
Jul 21 19:20:41 device-1 systemd[1]: Unit prodKPI.service entered failed state.
Jul 21 19:20:41 device-1 systemd[1]: prodKPI.service failed.

并没有太大帮助

journalctl -xe

-- Unit prodKPI.service has finished starting up.
-- 
-- The start-up result is done.
Jul 21 19:20:41 device-1 systemd[1]: Starting prodKPI.service: Aggregation logic to compute device availability...
-- Subject: Unit prodKPI.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit prodKPI.service has begun starting up.
Jul 21 19:20:41 device-1 python[1190]: /usr/bin/python: can't open file '/tmp/app1/folder1/file1.py;': [Errno 2] No such file or directory
Jul 21 19:20:41 device-1 systemd[1]: prodKPI.service: main process exited, code=exited, status=2/INVALIDARGUMENT
Jul 21 19:20:41 device-1 systemd[1]: Unit prodKPI.service entered failed state.
Jul 21 19:20:41 device-1 systemd[1]: prodKPI.service failed.
Jul 21 19:20:41 device-1 systemd[1]: prodKPI.service holdoff time over, scheduling restart.
Jul 21 19:20:41 device-1: start request repeated too quickly for prodKPI.service
Jul 21 19:20:41 device-1: Failed to start prodKPI.service: Aggregation logic to compute device availability.

下面的错误行指示某种权限问题？ 服务单元是否应该以不同的用户（或）访问级别运行？ 我将两个python文件都更改为可执行文件

Jul 21 19:20:41 device-1 python[1190]: /usr/bin/python: can't open file '/tmp/app1/folder1/file1.py;': [Errno 2] No such file or directory

Answer 1

如果Type不是oneshot ，则只能提供一个命令 。

另外，您在命令中使用bash语法。 如果您不想使用bash语法，则必须将其包装在中间的Shell进程中。 即：

ExecStart=/usr/bin/bash -c "python /tmp/app1/folder1/file1.py; /usr/bin/python /tmp/folder2/file2.py"