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Deploy Play Framework 1.x Scala

Overview

Clever Cloud supports Play 1.x applications natively. The present guide explains how to set up your application to run on Clever Cloud.

Create an application on Clever Cloud

via the web console

  1. Create a new app by clicking on the Add an Application button, in the sidebar.
  2. Select a brand new instance (or a repository from GitHub if your account is linked).
  3. Then select Scala in the platform list.
  4. Configure your scaling options.
  5. Enter your application’s name and description and click “Next”. You can also select the region you want (North America or Europe).

Refer to the getting started for more details on application creation via the console.

via the Clever Tools CLI

  1. Make sure you have clever-tools installed locally. Report to the getting started.
  2. In your code folder, do clever create --type <type> <app-name> --region <zone> --org <org> where type is the type of technology you rely on, app-name the name you want for your application, zone deployment zone (par for Paris and mtl for Montreal), and org the organization ID the application will be created under.

Refer to the documentation for more details on application creation with Clever Tools.

Setting up environment variables on Clever Cloud

With the Clever Cloud console

  1. Go to the Clever Cloud console, and find the app you want to fine tune under it’s organization.
  2. Find the Environment variables menu and select it.
  3. In this menu, you will see a form with VARIABLE_NAME and variable value fields. Fill them with the desired values then select Create.

With the Clever Tools CLI

  1. Make sure you have clever-tools installed locally. Report to the getting started
  2. In your code folder, do clever env set <variable-name> <variable-value>

Refer to environment variables reference for more details on available environment variables on Clever Cloud. You can of course create custom ones with the interface we just demonstrated, they will be available for your application.

Configure your Scala + Play! 1 application

Select Play! 1.x version

Clever Cloud supports Play! 1.2, 1.3, 1.4, 1.5. You can select the Play! version for your application by setting the PLAY1_VERSION environment variable (or by putting it in a file named clevercloud/play1_version).

The PLAY1_VERSION environment variable can contain one of the following values:

  • 1.2 or 12 for Play! 1.2.
  • 1.3 or 12 for Play! 1.3.
  • 1.4 or 14 for Play! 1.4.
  • 1.5 or 15 for Play! 1.5.

Play! configuration with application.conf

By default, your application will run on Clever Cloud with the option --%clevercloud.
It means that you can define special keys in your application.conf file that will be used only on Clever Cloud.

You can for example:

  • set production mode so the files are compiled at startup time and the errors are logged in a file:

    %clevercloud.application.mode=prod
    
  • set up a mysql database (using environment variables)

    %clevercloud.db.url="jdbc:mysql://"${MYSQL_ADDON_HOST}"/"${MYSQL_ADDON_DB}
    %clevercloud.db.driver=com.mysql.jdbc.Driver
    %clevercloud.db.user=${MYSQL_ADDON_USER}
    %clevercloud.db.pass=${MYSQL_ADDON_PASSWORD}
    

More information on playframework.com.

HTTPS support

HTTPS is handled by Clever Cloud ahead of your application, your application retrieves the traffic in plain http. To be able to use request.secure, you have to add XForwardedSupport=all in application.conf.

Monitor your application with New Relic

You can use New Relic to monitor your application on Clever Cloud. Please refer to the documentation to configure it for your application.

Environment injection

Clever Cloud injects environment variables from your application settings as mentioned in setting up environment variables and is also injecting in your application production environment, those from your linked add-ons.

To access the environment variables from your code, you need to add my.option=${MY_VARIABLE} in your application.conf file, and then use the configuration item my.option in your application. e.g %clevercloud.db.url="jdbc:mysql://"${MYSQL_ADDON_HOST}"/"${MYSQL_ADDON_DB}

Git Deployment on Clever Cloud

You need git on your computer to deploy via this tool. Here is the official website of Git to get more information: git-scm.com

Setting up your remotes

  1. The “Information” page of your app gives you your git deployment URL. It looks like this: git+ssh://git@push.clever-cloud.com/<your_app_id>.git. Copy it in your clipboard.

  2. Locally, under your code folder, type in git init to set up a new git repository or skip this step if you already have one.

  3. Add the deploy URL with git remote add <name> <your-git-deployment-url>.

  4. Add your files via git add <files path> and commit them via git commit -m <your commit message>.

  5. Now push your application on Clever Cloud with git push <name> master

Refer to the quickstart for more details on git deployments.

Linking a database or any other add-on to your application

By linking an application to an add-on, the application has the add-on environment variables in its own environment by default.

On add-on creation

Many add-ons do exist on Clever Cloud, please refer to the full list and check add-ons dedicated pages for full instructions.

During add-on creation, you will see Applications screen, with a list of your applications. You can toggle the button to Link and click next. If you finish the process of add-on creation, the application will automatically be linked to it.

Add-on already exists

In the Clever Cloud console, under the Service Dependencies menu of your application, you can use the Link addons dropdown menu to select the name of the add-on you want to link and use the add button to finish the process.

You can also link another application from the same page in the Clever Cloud console, using the Link applications dropdown menu.

More configuration

Need more configuration? To run a script at the end of your deployment? To add your private SSH key to access private dependencies? Go check the Common configuration page.

You may want to have an advanced usage of your application, in which case we recommend you to read the Administrate documentation section.

If you can’t find something or have a specific need like using a non supported version of a particular software, please reach out to the support.

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