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Systemd
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:github: https://github.com/systemd/systemd
:参考文档: https://blog.csdn.net/watch_wchao/article/details/128819185

在wsl系统启用systemd
===================================

https://learn.microsoft.com/zh-cn/windows/wsl/systemd

Example
===================================

配置文件一般存放在/etc/systemd/system/目录下

example.service

.. code-block:: ini

    [Unit]
    Description=Job that runs the foo daemon
    After=network.target
    Documentation=man:foo(1)

    [Service]
    Type=forking
    Environment=statedir=/var/cache/foo
    ExecStartPre=/usr/bin/mkdir -p ${statedir}
    ExecStart=/usr/bin/foo-daemon --arg1 "hello world" --statedir ${statedir}
    ; 运行目录
    WorkingDirectory=

    [Install]
    WantedBy=multi-user.target

添加到系统自启动项中:

.. code-block:: console

    $ systemctl enable example

列出所有服务
=========================

.. code-block:: console

    systemctl list-unit-files --type=service

学习范例
=====================

node_exporter的ansible剧本:

https://gitee.com/mirrors_prometheus-community/ansible/blob/main/roles/node_exporter/templates/node_exporter.service.j2

执行路径
=========================

执行路径默认是在 ``/`` 目录

.. code-block:: text

    [Service]
    WorkingDirectory=/data/gateway

查看日志
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.. code-block:: console

    journalctl -u scrapyd