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On this page
  • Create an environment handle
  • View environment handle details
  • Add the environment handle to your Application Template
  • Environment-specific environment variables

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  1. Reference documentation
  2. Account settings

Environment handles

Create custom, unique resource pools for your environments.

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Last updated 2 years ago

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An environment "handle" is a pre-generated, unique identifier that can be used for deterministic resource pools, such as environment URLs. For example, you can use an environment handle to create deterministic URLs for your environments for OAuth applications.

In Release, Professional account-holders can create a custom handle name and specify the number of resource handles to use it with. One of these resource handles can be "checked out" by an environment, which will then display the handle in its domain name.

For example, the end result of your environment handle being inserted into an environment's domain URL would look something like this:

https://service-${env_id}-appname.releaseapp.io

This is no different to a regular ephemeral environment space, except that your environment handle ${env_id} is allocated from the handle pool.

Create an environment handle

Select the Env Handles tab in Account Settings. In the Environment Handles page, click the New button.

In the modal window that opens, enter a name for your handle and how many handles you need. Click Create.

View environment handle details

In the Environment Handle Details page, you can see the name of each resource handle and which environment currently has it checked out. Notice how each resource handle name begins with the base handle name, followed by an incrementing index number. This is what will appear in the environment's URL.

Add the environment handle to your Application Template

environment_templates:
- name: ephemeral
  datasets:
  - name: handle_name

URL handle pools are only applied during environment creation and cannot be changed or applied retroactively to an existing environment.

Environment-specific environment variables

Environment handles allow you to set specific environment variables for each individual environment. For example, you may have a set of third-party service tokens that require a unique ID for each environment for testing purposes. This is a common pattern for services like Firebase or Twilio. You can provide each environment with a specific set of environment variables to be applied to that environment.

To add an environment variable to a handle, expand the section below the environment handle and click the plus sign. Insert the key and value in the relevant fields and click the check mark to save your changes.

Remove an environment variable from a handle by clicking the trash sign next to it.

In order for an environment to check out a unique handle, add the following to your :

Application Template
List of Environment Handles
Create Handle modal window
Adding a specific environment value to the "llama" environment handle.