How to add the Nginx-route relation

The nginx-route relation is preferred over the ingress relation if you want to use nginx-specific features, such as owasp-modsecurity-crs. If you need something more generic then please follow the ingress relation tutorial instead.

Add the nginx-route relation to your charm code

First download the nginx-route charm library by running:

charmcraft fetch-lib charms.nginx_ingress_integrator.v0.nginx_route

The nginx-route charm library is downloaded to lib/charms/nginx_ingress_integrator/v0/nginx_route.py.

Next update src/charm.py by importing require_nginx_route from the nginx-route charm library.

from charms.nginx_ingress_integrator.v0.nginx_route import require_nginx_route

Then add the following to the end of your charm’s __init__ method:

require_nginx_route(
    charm=self,
    service_hostname=self.config["external-hostname"] or self.app.name,
    service_name=self.app.name,
    service_port=8080 # assuming your app listens in port 8080
)

Update your charm metadata

In this above example, a new configuration option of external-hostname was used to configure ingress. Update config.yaml to add this configuration option.

  external-hostname:
    description: |
      The external hostname to use. Will default to the name of the deployed
      application.
    default: ""
    type: string

Now add the relation definition to metadata.yaml. Add the following to the end of that file:

requires:
  nginx-route:
    interface: nginx-route

Verify the relation

Rebuild your charm and run a charm upgrade.

charmcraft pack
juju refresh my-charm --path=./my-charm_ubuntu-22.04-amd64.charm

Now deploy the Nginx Ingress Integrator and relate to your charm using the nginx-route relation:

juju deploy nginx-ingress-integrator --trust
juju relate nginx-ingress-integrator my-charm:nginx-route