Reference » Primitives » App
A Resource is a network-accessible external service.
resources: main: type: postgres services: web: resources: - main
The following Resource types are currently available:
The URL presented by this environment variable will contain everything you need to connect, including authentication details.
For example, a
postgres resource named
main (as in the example above) would injected like this:
By default, any Resources you define will be satisfied by starting a containerized version on your Rack. This allows you to get up and running as quickly as possible and also provides a low cost solution and more effective usage of your Rack.
In your production environment, or for particular usage requirements, you may wish to replace the containerized Resources with a managed cloud service for durability. For instance, on AWS you may wish to utilise RDS to provide you with a Database, or on GCP you may wish to use Memorystore in place of a containerized Redis instance.
Resource Overlays provide you with a simple and effective way to maintain the cheaper and efficient containerized Resources on the environments you wish, whilst easily switching them out for the cloud-provider managed services on those environments that require them.
If you wish to replace any of those containerized Resources on a Rack, to stop them being initiated, you can manually set a matching environment variable is on your App. The corresponding Resource will then not be started by Convox on that Rack.
$ convox env set MAIN_URL=postgres://username:password@postgres–instance1.123456789012.us-east-1.rds.amazonaws.com:5432/database -r production-rack Setting MAIN_URL... OK Release: RABCDEFGHI
By doing this, a containerized
main resource will now no longer be started on the
production-rack for this app. The service will instead communicate with the managed database instead.
Specifying the environment variable
You can also specify the environment variable that should be used for linking in the
resources: main: type: postgres services: web: resources: - main:DIFFERENT_URL
This example would cause database URL to be injected as
Command Line Interface
$ convox resources -a myapp NAME TYPE URL main postgres postgres://username:firstname.lastname@example.org:port/database
Getting Information about a Resource
$ convox resources info main -a myapp Name main Type postgres URL postgres://username:email@example.com:port/database
Getting the URL for a Resource
$ convox resources url main -a myapp postgres://username:firstname.lastname@example.org:port/database
Launching a Console
$ convox resources console main -a myapp psql (11.5 (Debian 11.5-1+deb10u1), server 10.5 (Debian 10.5-2.pgdg90+1)) Type "help" for help. database=#
Starting a Proxy to a Resource
$ convox resources proxy main -a myapp Proxying localhost:5432 to host.name:port
Proxying allows you to connect tools on your local machine to Resources running inside the Rack.
Exporting Data from a Resource
$ convox resources export main -f /tmp/db.sql Exporting data from main... OK
Importing Data to a Resource
$ convox resources import main -f /tmp/db.sql Importing data to main... OK