CH-7 lab

How do you set up your package.json so that you can start the three servers with one command PORT=3000 BOAT_SERVICE_PORT=3333 BRAND_SERVICE_PORT=3334 npm start
Is it necessary to use the concurrently tool ? or is there another way ?
Thanks
@davidmarkclements
Best Answer
Answers
-
the command you've described should work on Linux/Mac
On windows you'd need to useset
before running the command- set PORT 3000
- set BOAT_SERVICE_PORT 3333
- set BRAND_SERVICE_PORT 3334
- npm start
If you wanted to modify the package.json directly and hard code the port numbers you can inline them on Linux/Mac like so:
- "start": "PORT=3000 BOAT_SERVICE_PORT=3333 BRAND_SERVICE_PORT=3334 <whatever command you use to start the app>"
This, obviously, won't work on Windows. To achieve something similar in Window see https://www.npmjs.com/package/cross-env - bear in mind that the exam takes place in a Linux environment.
0 -
Thanks @davidmarkclements
Im using linux.
What Im trying to do is to start the 3 servers with one command. I currently have the following in the package.json but it appears it does not work:
"start": "PORT=3000 BOAT_SERVICE_PORT=3333 BRAND_SERVICE_PORT=3334 node brand-service.js boat-service.js && fastify star -l info app.js"
Thanks in advance.
0 -
This format should work:
- PORT_A=4000 node serverA.js & PORT_B=5000 node serverB.js & PORT=3001 fastify start -l info app.js
1 -
Thanks @gregsheppard . Yes, using the
&
woks to run several commands in linux bash/temrinal but for some reason it is not taking the environment variables but starting the servers in other ports. I need to recheck my code implementation. Thank you.0 -
I realized after I posted the above that the fastify server won't have access to the
PORT_A
andPORT_B
ENV variables so try this instead:export PORT_A=4000 PORT_B=5000 PORT=3001; node serverA.js & node serverB.js & fastify start -l info app.js
0 -
Hi Greg. it is still don't work, but thank you so much for your help.
0 -
My apologies @nayib, I was more focused on responding with a demo of the shell grammar and hadn't tested it on the course code. I went back and fired it up and now have something verified but it got long enough to make a separate shell script that
npm start
executes.Here's the folder structure:
- .
- ├── bicycle-service.js
- ├── brand-service.js
- └── consuming-service
- ├── app.js
- ├── node_modules
- ├── npm_start_script <-------- This is the script below
- ├── package-lock.json
- ├── package.json
- ├── plugins
- ├── routes
- └── test
Here's the script:
- BICYCLE_SERVICE_PORT=4000
- BRAND_SERVICE_PORT=5000
- PORT="$BICYCLE_SERVICE_PORT" node ../bicycle-service.js &
- PORT="$BRAND_SERVICE_PORT" node ../brand-service.js &
- PORT=3001 fastify start -w -l info -P app.js
And finally, this is what I have in the package.json scripts:
"start": "sh npm_start_script"
This way all three services have their own
process.env.PORT
but the consuming service can also access the ports of the other two viaprocess.env.BICYCLE_SERVICE_PORT
andprocess.env.BRAND_SERVICE_PORT
.Let me know if you have any luck with this one.
1 -
this is as good a way as any
0 -
@gregsheppard thanks, it is a nice solution.
0
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