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95 lines
3.6 KiB
Markdown
95 lines
3.6 KiB
Markdown
# Environment Variables
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Convox encourages the use of environment variables for managing application secrets. Using environment
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variables allows you to keep secrets out of your codebase and to have different configuration values
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for different deployments (i.e. staging and production).
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## Definition
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Environment variables that will be used by the application are defined in `convox.yml`:
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### Application Level
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Environment variables defined at the top level affect every service in the application.
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environment:
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- ENCRYPTION_KEY
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services:
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web:
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environment:
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- ALLOWED_IPS
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- COOKIE_SECRET
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worker:
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environment:
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- QUEUE
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This application would require four environment variables to be set: `ALLOWED_IPS`, `COOKIE_SECRET`, `ENCRYPTION_KEY`, and `QUEUE`.
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The `ENCRYPTION_KEY` variable will be available to both services.
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### Service Level
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Environment variables can be defined for each [Service](../reference/app/primitives/service.md).
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services:
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web:
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environment:
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- ALLOWED_IPS
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- COOKIE_SECRET
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worker:
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environment:
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- QUEUE
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This application would require three environment variables to be set: `ALLOWED_IPS`, `COOKIE_SECRET`, and `QUEUE`.
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> Environment variables defined at the service level will only be available to that service. In the example above,
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> the `web` service would not have a value set for the `QUEUE` environment variable as that variable is only defined
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> on the `worker` service.
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### Default Values
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You can set a default value for any environment variable in the manifest:
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environment:
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- QUEUE=main
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### Interpolation
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You can also use environment variables to add dynamic configuration to your `convox.yml`:
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services:
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web:
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health: ${HEALTH_CHECK_PATH}
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## Configuration
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You can set values for your environment variables using `convox env set`:
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$ convox env set ALLOWED_IPS=1.2.3.4 COOKIE_SECRET=foo QUEUE=main
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Setting ALLOWED_IPS, COOKIE_SECRET, QUEUE... OK
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Release: RABCDEFGHI
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Setting environment variables will cause a new [Release](../reference/app/primitives/release.md) to be created. In order to deploy
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your changes you will need to promote this release.
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$ convox releases promote RABCDEFGHI
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Promoting RABCDEFGHI... OK
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> Environment variables must be defined in the `convox.yml` for their values to be populated on a
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> [Service](../reference/app/primitives/service.md).
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## System Variables
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The following environment variables are automatically set by Convox.
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| Name | Description |
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| ------------------- | --------------------------------------------------------------------------------------------- |
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| `APP` | Name of the [App](../reference/app.md) |
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| `BUILD` | ID of the currently-promoted [Build](../reference/app/primitives/build.md) |
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| `BUILD_DESCRIPTION` | Description of the currently-promoted [Build](../reference/app/primitives/build.md) |
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| `PORT` | The value of the `port:` attribute for this [Service](../reference/app/primitives/service.md) |
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| `RACK` | The name of the [Rack](../reference/rack.md) |
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| `RELEASE` | ID of the currently-promoted [Release](../reference/app/primitives/release.md) |
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| `SERVICE` | Name of the [Service](../reference/app/primitives/service.md) |
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