Dockerizing aplikasi nodejs - harus pm2 ls bekerja ketika saya pertama kali memulai wadah

Aug 18 2020

Saya memiliki aplikasi express / node berikut:

FROM node:12
WORKDIR /usr/share/jtapp
COPY  package*.json ./
RUN apt-get update
RUN apt-get install -y net-tools
RUN npm install
RUN npm install pm2@latest -g
#RUN npm ci --only=production
COPY . .
EXPOSE 3000
RUN pm2 start server.js

Sepertinya membangun dengan baik. Tetapi ketika saya memulai gambar dan melampirkan melalui bash, tidak ada proses pm2 yang berjalan.

Berikut hasil dari build tersebut:

Sending build context to Docker daemon  319.5kB                                                                                                                                                                                              Step 1/10 : FROM node:12                                                                                                                                                                                                                      ---> cfcf3e70099d                                                                                                                                                                                                                           Step 2/10 : WORKDIR /usr/share/jtapp                                                                                                                                                                                                     ---> Using cache                                                                                                                                                                                                                             ---> 2c2e2e1e92f2                                                                                                                                                                                                                           Step 3/10 : COPY  package*.json ./                                                                                                                                                                                                            ---> Using cache                                                                                                                                                                                                                             ---> 57829fd5e9d7                                                                                                                                                                                                                           Step 4/10 : RUN apt-get update                                                                                                                                                                                                                ---> Using cache                                                                                                                                                                                                                             ---> c0bbfed43ca8                                                                                                                                                                                                                           Step 5/10 : RUN apt-get install -y net-tools                                                                                                                                                                                                  ---> Using cache                                                                                                                                                                                                                             ---> 0b34759d8298                                                                                                                                                                                                                           Step 6/10 : RUN npm install                                                                                                                                                                                                                   ---> Using cache                                                                                                                                                                                                                             ---> 6abc42a9f8a3                                                                                                                                                                                                                           Step 7/10 : RUN npm install pm2@latest -g                                                                                                                                                                                                     ---> Running in 2fafacd302bf                                                                                                                                                                                                                /usr/local/bin/pm2 -> /usr/local/lib/node_modules/pm2/bin/pm2                                                                                                                                                                                /usr/local/bin/pm2-dev -> /usr/local/lib/node_modules/pm2/bin/pm2-dev                                                                                                                                                                        /usr/local/bin/pm2-docker -> /usr/local/lib/node_modules/pm2/bin/pm2-docker                                                                                                                                                                  /usr/local/bin/pm2-runtime -> /usr/local/lib/node_modules/pm2/bin/pm2-runtime               
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@~2.1.2 (node_modules/pm2/node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

+ [email protected]
added 185 packages from 191 contributors in 10.165s
Removing intermediate container 2fafacd302bf
 ---> 11d15b993ca2
Step 8/10 : COPY . .
 ---> efab8283bbd9
Step 9/10 : EXPOSE 3000
 ---> Running in aae343a75727
Removing intermediate container aae343a75727
 ---> b97825863317
Step 10/10 : RUN pm2 start server.js
 ---> Running in f0d14c61a3a6
[PM2] Spawning PM2 daemon with pm2_home=/root/.pm2
[PM2] PM2 Successfully daemonized
[PM2] Starting /usr/share/jtapp/server.js in fork_mode (1 instance)
[PM2] Done.
┌─────┬───────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name      │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
├─────┼───────────┼─────────────┼─────────┼─────────┼──────────┼────────┼──────┼───────────┼──────────┼──────────┼──────────┼──────────┤
│ 0   │ server    │ default     │ 1.0.0   │ fork    │ 28       │ 0s     │ 0    │ online    │ 0%       │ 28.2mb   │ root     │ disabled │
└─────┴───────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘
Removing intermediate container f0d14c61a3a6
 ---> 859f8479f3a6
Successfully built 859f8479f3a6

Lalu inilah cara saya memulai wadah dan memasangnya:

lab:/var/lib/git/jtapp# docker run -d -it --name jtapp -p 3000:3000 jtapp bash
d62927716ab593376c4e38f7d4d05007223ce2adfcb4997e722b81ad7260f114
lab:/var/lib/git/jtapp # docker exec -it jtapp  bash
root@d62927716ab5:/usr/share/jtapp # pm2
usage: pm2 [options] <command>

pm2 -h, --help             all available commands and options
pm2 examples               display pm2 usage examples
pm2 <command> -h           help on a specific command

Access pm2 files in ~/.pm2
root@d62927716ab5:/usr/share/jtapp #

Tapi saya bisa memulai semuanya secara manual begitu saya berada di dalam wadah, seperti ini:

root@d62927716ab5:/usr/share/jtapp# pm2 start server.js
[PM2] Spawning PM2 daemon with pm2_home=/root/.pm2
[PM2] PM2 Successfully daemonized
[PM2] Starting /usr/share/jtapp/server.js in fork_mode (1 instance)
[PM2] Done.
┌─────┬───────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name      │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
├─────┼───────────┼─────────────┼─────────┼─────────┼──────────┼────────┼──────┼───────────┼──────────┼──────────┼──────────┼──────────┤
│ 0   │ server    │ default     │ 1.0.0   │ fork    │ 37       │ 0s     │ 0    │ online    │ 0%       │ 28.4mb   │ root     │ disabled │
└─────┴───────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘

EDIT 1

Berubah:

 RUN pm2 start server.js 

untuk

 CMD ["pm2", "start", "server.js"]

Dan kemudian mencoba membangun kembali / memulai penampung. ketika saya melakukan "pm2 ls" itu masih kosong.

root@a8b7eb21d307:/usr/share/jtapp# pm2 ls
[PM2] Spawning PM2 daemon with pm2_home=/root/.pm2
[PM2] PM2 Successfully daemonized
┌────┬────────────────────┬──────────┬──────┬───────────┬──────────┬──────────┐
│ id │ name               │ mode     │ ↺    │ status    │ cpu      │ memory   │
└────┴────────────────────┴──────────┴──────┴───────────┴──────────┴──────────┘

EDIT 2

Ketika saya menghapus opsi "-d" di perintah jalankan saya:

lab:/var/lib/git/jtappd# docker run  -it --name jtapp -p 3000:3000 jtapp  bash
root@3cf4855372ec:/usr/share/jtapp# pm2 ls
[PM2] Spawning PM2 daemon with pm2_home=/root/.pm2
[PM2] PM2 Successfully daemonized
┌─────┬───────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name      │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
└─────┴───────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘
root@3cf4855372ec:/usr/share/jtapp#

EDIT 3

Jadi Dockerfile terlihat seperti ini sekarang:

FROM node:12
WORKDIR /usr/share/jtapp
COPY  package*.json ./
RUN apt-get update
RUN apt-get install -y net-tools
RUN npm install
RUN npm install pm2@latest -g
COPY . .
EXPOSE 3000
CMD ["npm", "run", "start:pm2"]

ekosistem.config.js terlihat seperti:

lab:/var/lib/git/jtapp# cat ecosystem.config.js
module.exports = {
  apps: [{
    name: 'jtapp',
    script: './server.js', //entrypoint
    instances: 1,
    autorestart: true, // pm2 to restart if this app fails/stops
    max_memory_restart: '1G'
  }]
}

dan bagian skrip package.json:

 1 {
 2   "name": "nodeserver",
 3   "version": "1.0.0",
 4   "description": "simple node server",
 5   "main": "index.js",
 6   "scripts": {
 7     "test": "echo \"Error: no test specified\" && exit 1",
 8     "start": "nodemon server.js",
 9     "start:pm2": "pm2 start ecosystem.config.js --no-daemon"
10   },

Dockerfile dibangun tanpa kesalahan. Tetapi ketika saya memulai penampung ... server.js tidak berjalan. pm2 diinstal.

Tetapi tidak ada masalah untuk memulainya secara manual menggunakan file ekosistem setelah saya masuk ke wadah seperti yang Anda lihat di bawah ini:

root@d51117d757a3:/usr/share/jtapp# pm2 start ecosystem.config.js
[PM2][WARN] Applications jtapp not running, starting...
[PM2] App [jtapp ] launched (1 instances)
┌─────┬──────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name     │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
├─────┼──────────┼─────────────┼─────────┼─────────┼──────────┼────────┼──────┼───────────┼──────────┼──────────┼──────────┼──────────┤
│ 0   │ jtapp    │ default     │ 1.0.0   │ cluster │ 36       │ 0s     │ 0    │ online    │ 0%       │ 32.6mb   │ root     │ disabled │
└─────┴──────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘

Jawaban

1 MohamadrezaRahimianGolkhandani Aug 19 2020 at 09:17

Pendekatan terbaik akan digunakan ecosystem.config.js. Letakkan file ini di direktori root proyek Anda:


module.exports = {
  apps: [{
    name: 'app',
    script: 'src/index.js', // Your entry point
    instances: 1,
    autorestart: true, // THIS is the important part, this will tell PM2 to restart your app if it falls over
    max_memory_restart: '1G'
  }]
}

kemudian instal modul pm2 sebagai npm di proyek Anda dan tambahkan skrip ini ke package.json

...
scripts: {
...
  "start:pm2":"pm2 start ecosystem.config.js --no-daemon"
}

dan terakhir gunakan CMD ini di dockerfile Anda

CMD [ "npm", "run", "start:pm2" ]

EDIT 1

Anda dapat menemukan proyek contoh di sini dengan file dok asli:

https://github.com/golkhandani/pm2_docker/tree/master

EDIT 2

Saya baru saja menguji repo dengan Manjarolinux lain dan ini perintahnya

git clone https://github.com/golkhandani/pm2_docker.git

docker build pm2_docker/ --tag pm2docker:test

docker run -p 3000:3000 -t pm2docker:test

yang -p 3000:3000arg harus ditambahkan untuk mengakses secara lokal ke server Anda.

ini adalah tangkapan layar tambahan yang menunjukkan perintah dan hasil: