feat: Implements the requirer side of the ingress integration

.github/workflows/integration-test.yaml

@@ -10,7 +10,7 @@ jobs:
         arch:
           - arch: amd64
             runner: [self-hosted, linux, X64, jammy, xlarge]
-  
+
     runs-on: ${{ matrix.arch.runner }}
     steps:
       - name: Checkout
@@ -21,31 +21,34 @@ jobs:
         with:
           name: built-charm-${{ matrix.arch.arch }}
           path: built/
-      
+
       - name: Get Charm Under Test Path
         id: charm-path
         run: echo "charm_path=$(find built/ -name '*.charm' -type f -print)" >> $GITHUB_OUTPUT
-      
+
       - name: Setup operator environment
         uses: charmed-kubernetes/actions-operator@main
         with:
           provider: microk8s
           channel: 1.29-strict/stable
           juju-channel: 3.4/stable
           lxd-channel: 5.20/stable
-
+
+      - name: Enable Metallb
+        run: /usr/bin/sg snap_microk8s -c "sudo microk8s enable metallb:10.0.0.2-10.0.0.10"
+
       - name: Run integration tests
         run: |
           tox -e integration -- \
             --charm_path=${{ steps.charm-path.outputs.charm_path }}
-  
+
       - name: Archive charmcraft logs
         if: failure()
         uses: actions/upload-artifact@v4
         with:
           name: charmcraft-logs
           path: /home/runner/.local/state/charmcraft/log/*.log
-  
+
       - name: Archive juju crashdump
         if: failure()
         uses: actions/upload-artifact@v4

charmcraft.yaml

@@ -29,13 +29,20 @@ provides:
     interface: prometheus_scrape
   grafana-dashboard:
     interface: grafana_dashboard
+  send-ca-cert:
+    interface: certificate_transfer
+    description: |
+      Send our CA certificate so clients can trust the CA by means of forming a relation.
 
 requires:
   access-certificates:
     limit: 1
     interface: tls-certificates
   logging:
     interface: loki_push_api
+  ingress:
+    interface: ingress
+    limit: 1
 
 containers:
   notary: