如何通过 systemctl 部署 eggjs？

[chenqh]

通过命令行可以启动:

cqh@cqh-MS-7A74:~/local_code/tscode/local_alarm$ npm run start

> [email protected] start /home/cqh/local_code/tscode/local_alarm
> egg-scripts start --daemon --title=egg-server-local_alarm

[egg-scripts] Starting egg application at /home/cqh/local_code/tscode/local_alarm
[egg-scripts] Run node /home/cqh/local_code/tscode/local_alarm/node_modules/egg-scripts/lib/start-cluster {"title":"egg-server-local_alarm","framework":"/home/cqh/local_code/tscode/local_alarm/node_modules/egg","baseDir":"/home/cqh/local_code/tscode/local_alarm"} --title=egg-server-local_alarm
[egg-scripts] Save log file to /home/cqh/logs
[egg-scripts] Wait Start: 1...
[egg-scripts] egg started on http://127.0.0.1:7001

service 文件

[Unit]
Description= local alarm service write by lua

[Service]
Type=simple
WorkingDirectory=/home/cqh/local_code/tscode/local_alarm
ExecStart=/home/cqh/git/nvm/versions/node/v10.3.0/bin/npm run start
User=cqh
Restart=on-failure
ExecStop=/home/cqh/git/nvm/versions/node/v10.3.0/bin/npm run stop

[Install]
WantedBy=multi-user.target

但是通过 systemctl 无法启动 journalctl -xe显示

-- Subject: local_alarm_lua.service 单元已结束停止操作
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- local_alarm_lua.service 单元已结束停止操作。
8 月 06 10:51:01 cqh-MS-7A74 systemd[1]: Started local alarm service write by lua.
-- Subject: local_alarm_lua.service 单元已结束启动
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- local_alarm_lua.service 单元已结束启动。
-- 
-- 启动结果为“ done ”。
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]: /home/cqh/git/nvm/versions/node/v10.3.0/lib/node_modules/npm/bin/npm-cli.js:79
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:       let notifier = require('update-notifier')({pkg})
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:       ^^^
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]: SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:     at exports.runInThisContext (vm.js:53:16)
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:     at Module._compile (module.js:374:25)
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:     at Object.Module._extensions..js (module.js:417:10)
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:     at Module.load (module.js:344:32)
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:     at Function.Module._load (module.js:301:12)
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:     at Function.Module.runMain (module.js:442:10)
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:     at startup (node.js:136:18)
8 月 06 10:51:01 cqh-MS-7A74 npm[4792]:     at node.js:966:3
8 月 06 10:51:01 cqh-MS-7A74 systemd[1]: local_alarm_lua.service: Main process exited, code=exited, status=1/FAILURE
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]: /home/cqh/git/nvm/versions/node/v10.3.0/lib/node_modules/npm/bin/npm-cli.js:79
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:       let notifier = require('update-notifier')({pkg})
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:       ^^^
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]: SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:     at exports.runInThisContext (vm.js:53:16)
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:     at Module._compile (module.js:374:25)
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:     at Object.Module._extensions..js (module.js:417:10)
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:     at Module.load (module.js:344:32)
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:     at Function.Module._load (module.js:301:12)
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:     at Function.Module.runMain (module.js:442:10)
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:     at startup (node.js:136:18)
8 月 06 10:51:01 cqh-MS-7A74 npm[4808]:     at node.js:966:3
8 月 06 10:51:01 cqh-MS-7A74 systemd[1]: local_alarm_lua.service: Control process exited, code=exited status=1
8 月 06 10:51:01 cqh-MS-7A74 systemd[1]: local_alarm_lua.service: Unit entered failed state.
8 月 06 10:51:01 cqh-MS-7A74 systemd[1]: local_alarm_lua.service: Failed with result 'exit-code'.
8 月 06 10:51:01 cqh-MS-7A74 systemd[1]: local_alarm_lua.service: Service hold-off time over, scheduling restart.
8 月 06 10:51:01 cqh-MS-7A74 systemd[1]: Stopped local alarm service write by lua.
-- Subject: local_alarm_lua.service 单元已结束停止操作
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 

所以， 这个 service 到底该怎么写呢？

新的配置
```
[Unit]
Description= local alarm service write by eggjs

[Service]
Type=forking
WorkingDirectory=/home/cqh/local_code/tscode/local_alarm
ExecStart=/home/cqh/git/nvm/versions/node/v10.3.0/bin/npm run start
User=cqh
Restart=on-failure
ExecStop=/home/cqh/git/nvm/versions/node/v10.3.0/bin/npm run stop
Environment=PATH=/home/cqh/git/nvm/versions/node/v10.3.0/bin/

[Install]
WantedBy=multi-user.target


```

错误提示
```
-- local_alarm_js.service 单元已开始启动。
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: > [email protected] start /home/cqh/local_code/tscode/local_alarm
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: > egg-scripts start --daemon --title=egg-server-local_alarm
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! file sh
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! path sh
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! code ELIFECYCLE
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! errno ENOENT
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! syscall spawn sh
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! [email protected] start: `egg-scripts start --daemon --title=egg-server-local_alarm`
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! spawn sh ENOENT
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR!
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! Failed at the [email protected] start script.
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! A complete log of this run can be found in:
8 月 07 08:58:54 cqh-MS-7A74 npm[7537]: npm ERR! /home/cqh/.npm/_logs/2018-08-07T00_58_54_407Z-debug.log
8 月 07 08:58:54 cqh-MS-7A74 systemd[1]: local_alarm_js.service: Control process exited, code=exited status=1
8 月 07 08:58:54 cqh-MS-7A74 systemd[1]: Failed to start local alarm service write by eggjs.
-- Subject: local_alarm_js.service 单元已失败
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

```

[zbinlin]

你的 service 应该是放到 system 里的，然而你系统里默认 node 版本比较低，而你通过 nvm 安装的最新版本的 node 无法直接在 systemctl 里被用到，所有出现报错了。
解决方式，要么把最新版的 node 安装在全局里，要么把这个 service 放到 systemctl user 里，然后在设置正确的环境变量。

BTW: 你最好把项目里 package.json 里的 `--daemon` 参数去掉，由 systemctl 来管理。

[chenqh]

@zbinlin 如何吧 nvm 的 node 添加到环境变量里面呢？加 path 变量？但是我还是出错了。。

[zbinlin]

是加入到 path 里，至于如何加，可以看这里的：

https://www.freedesktop.org/software/systemd/man/systemd.exec.html#Environment

https://wiki.archlinux.org/index.php/Systemd/User#Environment_variables

[chenqh]

@zbinlin 我现在已经加入了 PATH 变量， 但是还是出问题了， 大佬， 能给份 systemctl 启动 eggjs 的 demo 给我吗？

[zbinlin]

贴下最新的 service 和失败的日志

[Rocka]

既然 npm 的路径都写死了，为什么不把 node 的路径一起写死呢 …

ExecStart=/path/to/node /path/to/npm run start

不过既然都用 systemd 了，不如直接把 ExecStart 的命令改成 npm script 中的 start 对应的命令

[zjp]

[Service]
Type=fork

推荐 Arch Wiki 和阮一峰的博客

[chenqh]

@zbinlin 已添加新的配置和错误日志

[zbinlin]

```
[Unit]
Description= local alarm service write by eggjs

[Service]
Type=simple
WorkingDirectory=/home/cqh/local_code/tscode/local_alarm
ExecStart=npm run start
User=cqh
Restart=on-failure
ExecStop=npm run stop
Environment=PATH=/home/cqh/git/nvm/versions/node/v10.3.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin

[Install]
WantedBy=multi-user.target
```

[chenqh]

@zbinlin 还是不行， 还是报,
```
Executable path is not absolute, ignoring: npm run start

```

[zbinlin]

呃，/尴尬

把 ExecStart 和 ExecStop 改回用绝对路径，PATH 里加上 `/bin`：

```
ExecStart=/home/cqh/git/nvm/versions/node/v10.3.0/bin/npm run start
ExecStop=/home/cqh/git/nvm/versions/node/v10.3.0/bin/npm run stop
Environment=/home/cqh/git/nvm/versions/node/v10.3.0/bin:/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
```

[chenqh]

@zbinlin 知道是怎么回事了， 原来 path 要加 /bin/sh 的 /bin;

[zbinlin]

@chenqh 有些发行版不需要加，比如 Arch Linux，它所有 bin 都是在 /usr/bin 里，/bin 只是一个指向 /usr/bin 的链接而已。

[chenqh]

@zbinlin 谢谢大佬指点