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为什么服务无法开机自启动

tag-icon • tag-icon systemd startup services
为什么服务无法开机自启动

我想用来systemd在启动时启动服务。但是我收到消息说该服务处于非活动状态（已死亡）：

root@mdchost:/lib/systemd/system# systemctl status mdc_freespace_vldy_fusion_node.service
● mdc_freespace_vldy_fusion_node.service - MDC Freespace Vldy Fusion Node
   Loaded: loaded (/lib/systemd/system/mdc_freespace_vldy_fusion_node.service; enabled; vendor preset:
   Active: inactive (dead) since Sat 2018-08-04 01:06:48 BST; 5min ago
  Process: 3841 ExecStartPost=/bin/bash /usr/bin/mdc/base/set_limit.sh FUSI mdc_freespace_vldy_fusion_
  Process: 3838 ExecStart=/usr/bin/mdc/fusion/mdc_freespace_vldy_fusion_node (code=exited, status=0/SU
  Process: 3090 ExecStartPre=/opt/x86/ros/kinetic/bin/rosparam load /etc/mdc/fusion/kinematics_dynamic
  Process: 2266 ExecStartPre=/opt/x86/ros/kinetic/bin/rosparam load /etc/mdc/fusion/freespace_vldy_fus
 Main PID: 3838 (code=exited, status=0/SUCCESS)

但我可以通过执行命令手动启动它：

systemctl restart mdc_freespace_vldy_fusion_node.service

现在服务的状态变为活动（正在运行）：

root@mdchost:/lib/systemd/system# systemctl status mdc_freespace_vldy_fusion_node.service
● mdc_freespace_vldy_fusion_node.service - MDC Freespace Vldy Fusion Node
   Loaded: loaded (/lib/systemd/system/mdc_freespace_vldy_fusion_node.service; enabled; vendor preset:
   Active: active (running) since Sat 2018-08-04 01:29:31 BST; 1s ago
  Process: 2065 ExecStartPost=/bin/bash /usr/bin/mdc/base/set_limit.sh FUSI mdc_freespace_vldy_fusion_
  Process: 2017 ExecStartPre=/opt/x86/ros/kinetic/bin/rosparam load /etc/mdc/fusion/kinematics_dynamic
  Process: 1991 ExecStartPre=/opt/x86/ros/kinetic/bin/rosparam load /etc/mdc/fusion/freespace_vldy_fus
 Main PID: 2063 (mdc_freespace_v)
    Tasks: 6
   Memory: 3.5M
      CPU: 469ms
   CGroup: /system.slice/mdc_freespace_vldy_fusion_node.service
           └─2063 /usr/bin/mdc/fusion/mdc_freespace_vldy_fusion_node

这是我的服务文件：

[Unit]
Description=My Node
Requires=start_roscore.service
After=start_roscore.service

[Service]
User=mdc
Group=mdc

Type=simple
KillMode=proces
Restart=on-failure
RestartSec=16
StartLimitInterval=0

EnvironmentFile=/usr/bin/mdc/base/env.cfg
EnvironmentFile=/usr/bin/mdc/ros/ros.cfg

ExecStartPre=/opt/x86/ros/kinetic/bin/rosparam load /etc/mdc/fusion/freespace_vldy_fusion_config.yaml
ExecStartPre=/opt/x86/ros/kinetic/bin/rosparam load /etc/mdc/fusion/kinematics_dynamics.yaml

ExecStart=/usr/bin/mdc/fusion/mdc_freespace_vldy_fusion_node
ExecReload=/usr/bin/mdc/fusion/mdc_freespace_vldy_fusion_node

ExecStartPost=/bin/bash /usr/bin/mdc/base/set_limit.sh FUSI mdc_freespace_vldy_fusion_node

答案1

看一眼journalctl -u mdc_freespace_vldy_fusion_node.service。

该服务以 0 退出。早期启动状态有些令人/usr/bin/mdc/fusion/mdc_freespace_vldy_fusion_node不喜欢。

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