PM2和DotEnv的问题在ubuntu服务器上不起作用

Question

I know that there are answers for this question, but I don't want to create one more config file and load all the configuration there and run the pm2 process.

Project Structure
-----------------
.env
index.js -> server is listening in this file
routes/
models/
middleware/
startup/
package.json
...

Inside package.json

{
  "name": "eventbooking",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node -r dotenv/config index.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@hapi/joi": "^15.0.3",
    "bcryptjs": "^2.4.3",
    "compression": "^1.7.4",
    "dotenv": "^8.0.0",
    "express": "^4.17.1",
    "express-async-errors": "^3.1.1",
    "helmet": "^3.18.0",
    "joi-objectid": "^2.0.0",
    "jsonwebtoken": "^8.5.1",
    "mongoose": "^5.5.14",
    "winston": "^3.2.1"
  }
}

As you see from my package.json file that I am loading the node -r dotenv/config index.js file from scripts > start

When I run locally with the following command

npm start

The project works totally fine.

Now I have deployed the project to the server and there if I manually run

npm start

then works fine.

When I install PM2 in Ubuntu Server in production and do the following steps then it's not working.

Step 1: Mode inside the project folder in the root directory and

pm2 start index.js --name "Event Booking"

Then getting the following

 App name │ id │ version │ mode │ pid   │ status │ restart │ uptime │ cpu │ mem      │ user │ watching │
├──────────┼────┼─────────┼──────┼───────┼────────┼─────────┼────────┼─────┼──────────┼──────┼──────────┤ 

│ index    │ 0  │ 1.0.0   │ fork │ 29897 │ online │ 0       │ 0s     │ 0%  │ 3.7 MB   │ root │ disabled 

But the project not working. Whats the issue.

Even when I run the following as

pm2 start -r dotenv/config index.js --name 'Event Booking'

Then getting error as

error: unknown option `-r'

Any other solution to run the script with pm2

Answer 1

You need to follow the notes from my answer here: https://stackoverflow.com/a/55853036/2208713 . I can see from your question above you are mixing up pm2 syntax with npm. If you take the pattern from my answer you will be able to get this working easily enough - but follow my instructions carefully!

Answer 2

There are 2 ways to achieve a solution.

Solution 1:

When running the pm2 process run with the --node-args as follows

pm2 start index.js --name eventbooking --node-args="-r dotenv/config"

You can pass multiple arguments with space separated, other than dotenv/config I didn't need much as I am loading everything from dotenv package but showing just for demo as follows

pm2 start index.js --name eventbooking --node-args="-r dotenv/config --production --port=1337"

Solution 2:

Alternatively, you can initialize your project with pm2 init this will create the pm2 configuration file with name ecosystem.config.js

For me for some reasons the args under app didn't work so I had to add node_args again as follows

{
  "apps": [
    {
      "name": "eventbooking",
      "script": "./index.js",
      "node_args": ["-r dotenv/config"]
    }
  ]
}

Actually, I am sticking with solution 1 for cleaner and minimal code mode.

In case if anyone interested with PM2 options then please visit the following link

http://pm2.keymetrics.io/docs/usage/quick-start/