I need to execute the following command for production environment:
NODE_ENV=production node app.js
I tried passing it as a command under Configueration:
I get the following error in the logs:
sh: NODE_ENV=prod node app.js: command not found
I also tried:
NODE_ENV=prod //
error: sh: NODE_ENV=prod: command not found
NODE_ENV=prod app.js //
error: sh: NODE_ENV=prod app.js: command not found
What's the best way to execute the following command when launching the app on ELB:
NODE_ENV=production node app.js
You don't need to set the node command manually. Elastic Beanstalk attempts to start app.js, then server.js, and then npm start in that order. You can set the value of NODE_ENV in the "Environment Properties" section under "Configuration".
As others have mentioned you can manually add them by going to Configuration -> Software -> Environment properties.
A second way to do this is to add a .ebextensions/environment.config file.
Add the directory .ebextensions at the root of your project.
Create the file environment.config within .ebextensions.
Add your environment configurations.
Example of environment.config:
option_settings:
- option_name: NODE_ENV
value: production
You need to use the "Environment Properties" Not the node command.
Key: NODE_ENV
Value: production
I would just set NODE_ENV in Environment Properties under the same configuration area. You can also set this in your .ebextensions config.
Related
So I just deployed a site with node and pm2 for the first time and I'm going back and doing some optimization and reading best practices, etc.
I read that you can get a lot of benefit by setting NODE_ENV=production.
I found this in the pm2 docs:
[process.json]
"env_production" : {
"NODE_ENV": "production"
}
...
$ pm2 start process.json --env production
So, I did it but I have no idea if it is working. While trying to figure out how to check it I learned to try:
$ node
> process.env.NODE_ENV
> undefined
So, that's not a good sign.. but, with my limited understanding of how the low level stuff works, I can guess that maybe pm2 launches each app as a separate node process? So maybe I'm not in the right process when I try to check it.
Also, I don't know if I have to make a new ~/.pm2/dump.pm2 file because maybe whenever that is maybe overriding the options I set? (because I used pm2 startup).
How do I check if my pm2 app's NODE_ENV is set?
To answer the actual question in the title:
Within your script, for me my Express app's app.js file, you can use process.env.NODE_ENV to get the current value of NODE_ENV and log that out if you want.
An even better way is to use PM2's Process Metrics module, aka pmx.
yarn add pmx
or
npm install pmx --save
then
const Probe = require('pmx').probe()
Probe.metric({
name : 'NODE_ENV',
value : function() {
return process.env.NODE_ENV
}
})
Now it will show up in calls to pm2 monit (bottom left).
To change your environment:
It is necessary that you kill and restart the process to change your environment.
$ pm2 kill && pm2 start pm2.json --env production
The following isn't good enough:
pm2 restart pm2.json --env production
You can also check your NODE_ENV via running pm2 show <yourServerName>. This will output info about your running server including node env.
In addition, you can check your environment variables via running pm2 env 0. This will show all the environment variables for the running node process.
Start it with npm by adding this to your package.json:
"scripts": {
"myScript": "NODE_ENV=production pm2 start server.js"
}
Then
npm start myScript
You can do it directly too, but this is easy to manage, automate wth crontab and is in your source control...
Your process.json file is incomplete. Try using something like this:
[process.json]
{
"name" : "MyApp",
"script" : "myapp.js",
"env_production" : {
"NODE_ENV": "production"
}
}
Then add logging into your code, preferably somwhere on startup:
console.log("NODE_ENV : ", process.env.NODE_ENV);
Now start the application:
pm2 start process.json --env production
Lastly watch app logs:
pm2 logs MyApp
This should do it.
May be at the start of your server script you can print the value of the environment variable and then check the PM2 logs. Use the following code to print your environment variable value:
console.log('process.env.NODE_ENV:', process.env.NODE_ENV);
And then use the following code to see the PM2 logs
pm2 logs app_name
Here app_name is your process name as indicated by the entry in the process.json file.
You can set Environment variable for pm2 specifically.
go to /etc/systemd/system/ location.
you can see a file named pm2-username.service
file. (eg: pm2-root.service ) you can directly add an Enviorment variable for pm2.
for me, it was LD_LIBRARY_PATH . so I added the line as below after the PATH variable.
Environment=PATH=/usr/local/lib......
Environment=LD_LIBRARY_PATH=/opt/oracle/instantclient_21_1
after that, you can restart or start the node application with update-env flag,
pm2 start yourapp --update-env
try pm2 env <app_name/id> also you can find NODE_ENV in pm2 show <app_name/id>
In your terminal just type:
echo NODE_ENV
it will print current selected environment variable
I use custom node.js cartridge on openshift
icflorescu/openshift-cartridge-nodejs .
How can i set NODE_PATH=. for app start in package.json ? Should i provide it in package.json like that : "start": "NODE_PATH=. NODE_ENV=production node app.js" ,
either i should use something like here
Dindaleon/hapi-react-starter-kit - some npm package like cross-env
I have line in main app.js file. There is folder named 'config', in the same directory with app.js, in folder config placed file index.js, file index.js have code with 'module.exports = Object.assign({ ...some conifg object... });' . When i delete NODE_PATH=. , node throws "Error: Cannot find module 'config' " .
var config = require('config');
I'm the author of openshift-cartridge-nodejs :-)
Having "start": "node app.js" in your package.json should be just enough.
If you take a look at bin/install, you'll see that NODE_ENV is already set to production by default in the cartridge setup script.
Also, I'm not sure what you're trying to achieve by setting NODE_PATH to .. There's a single Node.js version installed.
If you're generally interested in how you can set custom environment variables in an OpenShift-deployed application, have a look at the docs here. Basically you'll have to use the rhc command-line utility like this:
$ rhc env set <Variable>=<Value> <Variable2>=<Value2> -a App_Name
I am a beginner in Node and I see the following code in my project:
process.env.NODE_ENV
What is NODE_ENV and how can I get access to it or change it? It seems to pick up some values but don't know from where is it getting picked up.
Please let me know.
NODE_ENV is the name of an environment variable, and you can access and change it in your shell Ex: export NODE_ENV=development , you can change it when running your process, Ex: NODE_ENV=production node application.js, or you can change it in one of your shell's configuration files.
When I build, test and deploy my node application from Codeship to Heroku I want to be able to set a release flag to true using a command line during the build. And in my code I want to do something like this....
if(config.release) load(liveConnection);
else load(debugConnection);
How can I achieve this? Is there some sort of package I install to run a build script which will transform my config file?
Instead of using a config file, you should use environment variables. For example:
heroku config:set NODE_ENV=production
Then, in node:
if (process.env.NODE_ENV === 'production') load(etc);
An even better way is to just provide connection information uniformly, through config files, like this:
heroku config:set CONNECTION_STRING=foo
Then in node:
load(process.env.CONNECTION_STRING);
That way, the environment is providing the config. Locally, you can start the app with a development string like CONNECTION_STRING=some_debug_string node server.js, or you can use a .env file to provide a whole set of them. More info here:
http://12factor.net/config
When I'm in dev mode I don't want my server to send email and some other stuff so I have this in server.js file:
process.env.NODE_ENV = 'development';
When I move it to production i change the value to 'production'.
Problem is of course that it is easy to forget on deployments. Is it possible somehow to detect when server is in production?
If it's not, is it possible to write a batch script that replaces a string in a file?
You shouldn't manually change values of process.env object, because this object is reflecting your execution environment.
In your code you should do the following:
const environment = process.env.NODE_ENV || 'development';
And then you launch your app in production like this:
$ NODE_ENV=production node app.js
If NODE_ENV environment variable is not set, then it will be set to development by default.
You could also use dotenv module in development to specify all environment variables in a file.
Furthermore, I've implemented a reusable module, which allows to automatically detect environment by analyzing both CLI arguments and NODE_ENV variable. This could be useful on your development machine, because you can easily change environment by passing a CLI argument to you Node.js program like this: $ node app.js --prod. It's also nice to use with Gulp: $ gulp build --prod.
Please see more details and use cases on the detect-environment's page.
The suggested way to tackle these kind of problems is by using the process global object provided by NodeJS. For example:
var env = process.env.NODE_ENV || "development";
By the above line. We can easily switch between development / production environment. If we haven't configured any environment variable it works with development environment.
process.env is an object that contains the user environment.
For example if we are running our application in a bash shell and have configured NODE_ENV to production. Then i can access that in node application as process.env.NODE_ENV.
There are multiple ways to define this NODE_ENV variable for nodejs applications:
## Setting environment variable for bash shell
export NODE_ENV=production
## Defined while starting the application
NODE_ENV=production node app.js
So i don't think you would require any batch file for this. When handling multiple configuration variables, follow this.
This is normally handled through configuration files (e.g. config frameworks like node-convict) and through environmental variables. In the start command in production, you might do something like:
NODE_ENV=production npm start
then the process.env.NODE_ENV would be properly set by any module in your app that cares.