未能添加对 mongod.target[Service] 的依赖，忽略：无效参数

Posted 2023-02-19

【中文标题】未能添加对 mongod.target[Service] 的依赖，忽略：无效参数

【英文标题】：Failed to add dependency on mongod.target[Service], ignoring: Invalid argument

【发布时间】：2017-09-13 18:32:49

【问题描述】：

当我在 CentOS 7 上安装 Rocket.Chat 服务器时，我创建了rocketchat.service：

[Unit]
Description=The Rocket.Chat server
After=network.target remote-fs.target nss-lookup.target 
mongod.target[Service]
Type=simple
ExecStart=/usr/local/bin/node /opt/Rocket.Chat/main.js
Restart=always
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=rocketchat
User=root
Environment=MONGO_URL=mongodb://localhost:27017/rocketchat 
ROOT_URL=http://www.leavenotrace.cn PORT=3000
[Install] WantedBy=multi-user.target

当我按下命令时：

systemctl start rocketchat
systemctl status rocketchat

显示以下错误：

Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:3] Failed to add dependency on mongod.target[Service], ignoring: Invalid argument
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:4] Unknown lvalue 'Type' in section 'Unit'
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:5] Unknown lvalue 'ExecStart' in section 'Unit'
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:6] Unknown lvalue 'Restart' in section 'Unit'
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:7] Unknown lvalue 'StandardOutput' in section 'Unit'
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:8] Unknown lvalue 'StandardError' in section 'Unit'
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:9] Unknown lvalue 'SyslogIdentifier' in section 'Unit'
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:10] Unknown lvalue 'User' in section 'Unit'
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:11] Unknown lvalue 'Environment' in section 'Unit'
Apr 18 11:50:13 VM_56_252_centos systemd[1]: [/etc/systemd/system/rocketchat.service:12] Invalid section header '[Install] WantedBy=multi-user.target'

【问题讨论】：

您的问题是rocketchat.service 文件中缺少两个换行符，就在[Service] 之前和WantedBy= 之前。

【参考方案1】：

之前：

nano /etc/systemd/system/rocketchat.service

它会显示这些错误。

之后：

nano /usr/lib/systemd/system/rocketchat.service

在里面写：

  [Unit]
  Description=The Rocket.Chat server
  After=network.target remote-fs.target nss-lookup.target nginx.target mongod.target
  [Service]
  ExecStart=/usr/local/bin/node /opt/Rocket.Chat/main.js
  StandardOutput=syslog
  StandardError=syslog
  SyslogIdentifier=rocketchat
  User=root
  Environment=MONGO_URL=mongodb://localhost:27017/rocketchat ROOT_URL=http://www.leavenotrace.cn:3000/ PORT=3000
  [Install]
  WantedBy=multi-user.target

没关系。

【讨论】：

文件的位置不是问题，无论是在/etc 还是/usr/lib。只需将您的答案切入重点：OP 的 rocketchat.service 文件中缺少两个换行符。

顺便说一下，这是OP。