Refactor cert-manager and ExternalDNS configurations

- Updated the namespace for the internal wildcard certificate from 'internal' to 'cert-manager'.
- Adjusted the DNS zone selectors in Let's Encrypt configurations to use CLOUDFLARE_DOMAIN consistently.
- Changed the namespace for the wildcard certificate from 'default' to 'cert-manager'.
- Modified ExternalDNS configuration to use OWNER_ID instead of CLUSTER_ID for TXT owner ID.
- Cleaned up setup-cert-manager.sh by removing unnecessary internal namespace creation and secret duplication.
- Updated certificate wait commands to reflect the new namespace structure.
- Simplified the copying of certificates to the example-admin namespace.
- Removed test service deployment from setup-externaldns.sh for a cleaner setup process.

infrastructure_setup/setup-externaldns.sh

@@ -36,20 +36,8 @@ cat ${SCRIPT_DIR}/externaldns/externaldns.yaml | envsubst | kubectl apply -f -
 echo "Waiting for ExternalDNS to be ready..."
 kubectl rollout status deployment/external-dns -n externaldns --timeout=60s
 
-# Deploy test services if --test flag is provided
-if [[ "$1" == "--test" ]]; then
-  echo "Deploying test services to verify ExternalDNS..."
-  cat ${SCRIPT_DIR}/externaldns/test-service.yaml | envsubst | kubectl apply -f -
-  cat ${SCRIPT_DIR}/externaldns/test-cname-service.yaml | envsubst | kubectl apply -f -
-  
-  echo "Test services deployed at:"
-  echo "- test.${DOMAIN}"
-  echo "- test-cname.${DOMAIN} (CNAME record)"
-  echo "DNS records should be automatically created in Cloudflare within a few minutes."
-fi
-
 echo "ExternalDNS setup complete!"
 echo ""
 echo "To verify the installation:"
 echo "  kubectl get pods -n externaldns"
-echo "  kubectl logs -n externaldns -l app=external-dns -f"
+echo "  kubectl logs -n externaldns -l app=external-dns -f"