Kontena – Kontena is a lightweight container that will run your apps and services in an isolated and secured manner. You can specify the power of the Kontena while setting up infra or creating services. One Kontena power specifies to 256 MB Memory and 128 MHz CPU.

Service – Services in the App42 PaaS are add-on components which are needed in an App. App42 PaaS supports multiple services like SQL databases, NoSQL databases and more.

Once you have setup the Rails environment and created the MongoDB service, You need to configure the MongoDB credentials in your created Ruby on Rails application(config/mongoid.yml).

sessions:
  default:
     database: < database name >                    # Database Name                    
     hosts: 
       - < host >:< port >                          # VM Ip  and VM Port                            
     username: < user name >                        # User Name     
     password: < password >                         # Password
     options:
       consistency: :strong
       # In the test environment we lower the retries and retry interval to
       # low amounts for fast failures.
       max_retries: 1
       retry_interval: 0

You can also use our Sample Apps and extend it to suit your needs. Here is the link to Ruby on Rails MongoDB Sample App

After doing all the modifications to your App, you need to update it on App42 PaaS to get the changes affected in your App running on App42 PaaS platform.

$ app42 update
Enter App Name: javademo
1: Binary
2: Source
Choose Upload Type [Binary]: 2

Updating Application... OK

Operation is in progress, Please wait...-
App deployed successfully.