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I'm running a rails app on a Centos 6.5 server with Passenger and Nginx. How can I check which environment it's running on without stopping it?
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Rails reads the current environment from the operating system's environment variables by checking the following in order of priority: Get the value of the RAILS_ENV environment variable by calling ENV["RAILS_ENV"] If the above is nil, then get ENV["RACK_ENV"] If the above is nil, then make it equal to "development"
When we generate a new Rails application we get three environments by default: development , test and production . There's nothing special about these particular environments, though, and there are very few places in the Rails source code that refer to them.
Go to your browser and open http://localhost:3000, you will see a basic Rails app running. You can also use the alias "s" to start the server: bin/rails s . The server can be run on a different port using the -p option. The default development environment can be changed using -e .
The ENV hash in your Rails application is set when your Rails application starts. Rails loads into ENV any environment variables stored in your computer and any other key-value pairs you add using Figaro gem.
Use the passenger-status command. For example, this shows me passenger is running the production environment (the first line under the Application groups heading):
(production-web) ubuntu@ip-10-0-3-146 ~% sudo passenger-status
Version : 5.0.15
Date : 2015-08-20 17:40:24 +0000
Instance: lNNFwV1C (Apache/2.4.7 (Ubuntu) Phusion_Passenger/5.0.15)
----------- General information -----------
Max pool size : 12
App groups : 1
Processes : 6
Requests in top-level queue : 0
----------- Application groups -----------
/home/my-app/deploy/current (production):
App root: /home/my-app/deploy/current
Requests in queue: 0
* PID: 11123 Sessions: 0 Processed: 12997 Uptime: 21h 14m 2s
CPU: 0% Memory : 190M Last used: 1s ago
* PID: 11130 Sessions: 0 Processed: 140 Uptime: 21h 14m 2s
CPU: 0% Memory : 153M Last used: 9m 32s a
* PID: 11137 Sessions: 0 Processed: 15 Uptime: 21h 14m 2s
CPU: 0% Memory : 103M Last used: 57m 54s
* PID: 11146 Sessions: 0 Processed: 6 Uptime: 21h 14m 2s
CPU: 0% Memory : 101M Last used: 7h 47m 4
* PID: 11153 Sessions: 0 Processed: 5 Uptime: 21h 14m 1s
CPU: 0% Memory : 100M Last used: 8h 42m 3
* PID: 11160 Sessions: 0 Processed: 2 Uptime: 21h 14m 1s
CPU: 0% Memory : 81M Last used: 8h 42m 3
rails console is not reliable - it only tells you what environment the console is running under. Passenger may be configured to run in a different environment.
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