2017-07-11

pm2, node的程序(進程)管理工具, 使用與教學

今天的東東叫pm2, pm2是node的一個可監控程序的工具, 不多廢, 進主題

進行全域安裝

workspace npm install pm2 -g

/home/cabox/.nvm/versions/node/v5.2.0/bin/pm2 -> /home/cabox/.nvm/versions/node/v5.2.0/lib/node_modules/pm2/bin/pm2

/home/cabox/.nvm/versions/node/v5.2.0/bin/pm2-dev -> /home/cabox/.nvm/versions/node/v5.2.0/lib/node_modules/pm2/bin/pm2-dev

/home/cabox/.nvm/versions/node/v5.2.0/bin/pm2-docker -> /home/cabox/.nvm/versions/node/v5.2.0/lib/node_modules/pm2/bin/pm2-docker

/home/cabox/.nvm/versions/node/v5.2.0/bin/pm2-daemon -> /home/cabox/.nvm/versions/node/v5.2.0/lib/node_modules/pm2/bin/pm2-daemon

/home/cabox/.nvm/versions/node/v5.2.0/bin/pm2-runtime -> /home/cabox/.nvm/versions/node/v5.2.0/lib/node_modules/pm2/bin/pm2-runtime

/home/cabox/.nvm/versions/node/v5.2.0/lib

`– pm2@2.5.0

npm WARN optional Skipping failed optional dependency /pm2/chokidar/fsevents:

npm WARN notsup Not compatible with your operating system or architecture: fsevents@1.1.2

➜ workspace

YA裝好了, 目前安裝的是2.5.0版本

如何使用它
進入到你的node app資夾, 一般情況下都是執行npm start啟動你的node app
start的內容多半是指定在package.json裡, 可以去看就道了, 如果你的啟動是index.js
那就是…

bk git:(master) pm2 start index.js

[PM2] Starting /home/cabox/workspace/bk/index.js in fork_mode (1 instance)

[PM2] Done.

┌──────────┬────┬──────┬──────┬────────┬─────────┬────────┬─────┬───────────┬──────────┐

│ App name │ id │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ watching │

├──────────┼────┼──────┼──────┼────────┼─────────┼────────┼─────┼───────────┼──────────┤

│ index │ 0 │ fork │ 9660 │ online │ 0 │ 0s │ 0% │ 13.3 MB │ disabled │

└──────────┴────┴──────┴──────┴────────┴─────────┴────────┴─────┴───────────┴──────────┘

Use `pm2 show ` to get more details about an app

瞧, 有了! 這樣就開始被監控了, 然後你的app 也啟動了

也是可以將App name命名, 如

bk git:(master) pm2 start index.js –name myapp

[PM2] Spawning PM2 daemon with pm2_home=/home/cabox/.pm2

[PM2] PM2 Successfully daemonized

[PM2] Starting /home/cabox/workspace/bk/index.js in fork_mode (1 instance)

[PM2] Done.

┌──────────┬────┬──────┬───────┬────────┬─────────┬────────┬─────┬───────────┬──────────┐

│ App name │ id │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ watching │

├──────────┼────┼──────┼───────┼────────┼─────────┼────────┼─────┼───────────┼──────────┤

│ myapp │ 0 │ fork │ 10014 │ online │ 0 │ 0s │ 0% │ 13.4 MB │ disabled │

└──────────┴────┴──────┴───────┴────────┴─────────┴────────┴─────┴───────────┴──────────┘

Use `pm2 show ` to get more details about an app

瞧, 有了! 己變成myapp, 然後你的app 也啟動了, 去看看吧
(app啟動無圖) XD

接下來看看監控的dashboard
bk git:(master) pm2 monit
會出現下列

Process list ─────────────────────────────┐┌─ Global Logs ───────────────────────────────────────────────────────────────────────────────────────────┐

│[ 0] myapp Mem: 44 MB CPU: 0 % on ││ myapp > Executing (default): SELECT `id`, `title`, `body`, `noteday`, `createdAt`, `updatedAt`, │

│ ││ `ProfileId` FROM `Notes` AS `Note`; │

│ ││ myapp > Executing (default): SELECT `id`, `email`, `password`, `createdAt`, `updatedAt` FROM │

│ ││ `Accounts` AS `Account`; │

│ ││ │

└────────────────────────────────────────────┘└─────────────────────────────────────────────────────────────────────────────────────────────────────────┘

┌─ Custom metrics (http://bit.ly/code-metric─┐┌─ Metadata ──────────────────────────────────────────────────────────────────────────────────────────────┐

│ Loop delay 0.47ms ││ App Name myapp │

│ ││ Restarts 0 │

│ ││ Uptime 14m │

│ ││ Script path /home/cabox/workspace/bk/index.js │

│ ││ Script args N/A │

│ ││ Interpreter node │

│ ││ Interpreter args N/A │

│ ││ Exec mode fork │

│ ││ Node.js version 5.2.0 │

│ ││ watch & reload ? │

瞧, 是不是, 監控畫面開啟了

如何停止它

workspace pm2 stop myapp

[PM2] Applying action stopProcessId on app [myapp](ids: 0)

[PM2] [myapp](0) ✓

┌──────────┬────┬──────┬───────┬─────────┬─────────┬────────┬─────┬───────────┬──────────┐

│ App name │ id │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ watching │

├──────────┼────┼──────┼───────┼─────────┼─────────┼────────┼─────┼───────────┼──────────┤

│ myapp │ 0 │ fork │ 0 │ stopped │ 0 │ 0 │ 0% │ 0 B │ disabled │

│ myapp2 │ 1 │ fork │ 10826 │ online │ 0 │ 2m │ 0% │ 24.2 MB │ disabled │

└──────────┴────┴──────┴───────┴─────────┴─────────┴────────┴─────┴───────────┴──────────┘

Use `pm2 show ` to get more details about an app

瞧, myapp己停止了

如何刪除它

workspace pm2 delete myapp

[PM2] Applying action deleteProcessId on app [myapp](ids: 0)

[PM2] [myapp](0) ✓

│ App name │ id │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ watching │

│ myapp2 │ 1 │ fork │ 10826 │ online │ 0 │ 11m │ 0% │ 22.7 MB │ disabled │

Use `pm2 show ` to get more details about an app

瞧, myapp己被刪了

不再用它時

好了, 關閉pm2的監控吧

bk git:(master) pm2 kill

[PM2] Stopping PM2…

[PM2] Applying action deleteProcessId on app [all](ids: 0)

[PM2] [myapp](0) ✓

[PM2] All processes have been stopped and deleted

[PM2] PM2 stopped

workspace pm2 list

[PM2] Spawning PM2 daemon with pm2_home=/home/cabox/.pm2

[PM2] PM2 Successfully daemonized

┌──────────┬────┬──────┬─────┬────────┬─────────┬────────┬─────┬─────┬──────────┐

│ App name │ id │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ watching │

└──────────┴────┴──────┴─────┴────────┴─────────┴────────┴─────┴─────┴──────────┘

Use `pm2 show ` to get more details about an app

瞧, 己經沒有app被監控了

收工, 今天就介紹到這兒吧, 下次再做進階的應用, 881~

世界因你而進步-OPEN壽司

希望所分享的各種相關資訊，大家可以從這裡可以獲得些些小許的協助，也算是回饋做法。會陸續的增加內容唷~

pm2, node的程序(進程)管理工具, 使用與教學