✨ Add Ingress overlay to access Catalog contents outside of the cluster

config/nginx-ingress/kustomization.yaml

@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+- ../default
+- resources/nginx_ingress.yaml 
+- https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml

config/nginx-ingress/resources/nginx_ingress.yaml

@@ -0,0 +1,17 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: catalogd-ingress
+  namespace: catalogd-system
+spec:
+  ingressClassName: nginx
+  rules:
+  - http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: catalogd-catalogserver
+            port:
+              number: 80

docs/fetching-catalog-contents.md

@@ -57,3 +57,81 @@ An example `curl` request that assumes the port-forwarding is mapped to port 808
 ```sh
 curl http://localhost:8080/catalogs/operatorhubio/all.json
 ```
+
+# Fetching `Catalog` contents from the `Catalogd` Service outside of the cluster
+
+This section outlines a way of exposing the `Catalogd` Service's endpoints outside the cluster and then accessing the catalog contents using `Ingress`. 
+
+**Prerequisites**
+
+- [Install kind](https://kind.sigs.k8s.io/docs/user/quick-start/#installation)
+- Assuming `kind` is installed, create a `kind` cluster with `extraPortMappings` and `node-labels` as shown in the [kind documentation](https://kind.sigs.k8s.io/docs/user/ingress/)
+- Install latest version of `Catalogd` by navigating to the [releases page](https://github.com/operator-framework/catalogd/releases) and following the install instructions included in the release you want to install.
+- Install the `Ingress NGINX` Controller by running the below command:
+
+  ```sh
+    $ kubectl apply -k  https://github.com/operator-framework/catalogd/tree/main/config/nginx-ingress
+  ```
+  By running tha above command, the `Ingress` Controller is installed. Along with it, the `Ingress` Resource will be applied automatically as well, thereby creating an `Ingress` Object on the cluster.
+
+1. Once the prerequisites are satisfied, create a `Catalog` object that points to the OperatorHub Community catalog by running the following command:
+
+    ```sh
+      $ kubectl apply -f - << EOF
+      apiVersion: catalogd.operatorframework.io/v1alpha1
+      kind: Catalog
+        metadata:
+          name: operatorhubio
+        spec:
+          source:
+            type: image
+            image:
+              ref: quay.io/operatorhubio/catalog:latest
+        EOF
+    ```
+
+1. Before proceeding further, let's verify that the `Catalog` object was created successfully by running the below command: 
+
+    ```sh
+      $ kubectl describe catalog/operatorhubio
+    ```
+
+1. At this point the `Catalog` object exists and `Ingress` controller is ready to process requests. The sample `Ingress` Resource that was created during Step 4 of Prerequisites is shown as below: 
+
+    ```yaml
+      apiVersion: networking.k8s.io/v1
+      kind: Ingress
+      metadata:
+        name: catalogd-nginx-ingress
+        namespace: catalogd-system
+      spec:
+        ingressClassName: nginx
+        rules:
+        - http:
+            paths:
+            - path: /
+              pathType: Prefix
+              backend:
+                service:
+                  name: catalogd-catalogserver
+                  port:
+                    number: 80
+      ```
+    Let's verify that the `Ingress` object got created successfully from the sample by running the following command:
+
+      ```sh
+        $ kubectl describe ingress/catalogd-ingress -n catalogd-system
+      ```
+
+1. Run the below example `curl` request to retrieve all of the catalog contents:
+
+    ```sh
+      $ curl http://<address>/catalogs/operatorhubio/all.json
+    ```
+
+    To obtain `address` of the ingress object, you can run the below command and look for the value in the `ADDRESS` field from output: 
+    ```sh
+      $ kubectl -n catalogd-system get ingress
+    ```
+
+    You can further use the `curl` commands outlined in the [Catalogd README](https://github.com/operator-framework/catalogd/blob/main/README.md) to filter out the JSON content by list of bundles, channels & packages.