node_external_ip_controller_async.py

@@ -1,28 +1,23 @@
 import asyncio
 from kubernetes_asyncio import client, config, watch
-import os
 
 # Configuration
-SERVICE_NAME = os.getenv("SERVICE_NAME", "traefik")
-SERVICE_NAME_LABEL_PATTERN = os.getenv(
-    "SERVICE_NAME_LABEL_PATTERN", "app.kubernetes.io/name=traefik"
-)
-NAMESPACE = os.getenv("NAMESPACE", "kube-system")
-ANNOTATION_KEY = os.getenv("ANNOTATION_KEY", "kube-vip.io/loadbalancerIPs")
-ZERO_GATEWAY_IP = os.getenv("ZERO_GATEWAY_IP", "172.28.10.1")
-NODE_LABEL = os.getenv("NODE_LABEL", "svccontroller.k3s.cattle.io/enablelb=true")
-SERVICE_REQUEST_TIMEOUT = int(os.getenv("SERVICE_REQUEST_TIMEOUT", 300))
-NODE_REQUEST_TIMEOUT = int(os.getenv("NODE_REQUEST_TIMEOUT", 300))
+SERVICE_NAME = "traefik"
+SERVICE_NAME_LABEL_PATTERN = "app.kubernetes.io/name=traefik"  # Define the service name pattern or label to identify services
+NAMESPACE = "kube-system"
+ANNOTATION_KEY = "kube-vip.io/loadbalancerIPs"
+ZERO_GATEWAY_IP = "172.28.10.1"
+NODE_LABEL = "svccontroller.k3s.cattle.io/enablelb=true"
 
 
-async def update_service_annotation(v1, service_name, external_ips):
+async def update_service_annotation(v1, service_name, external_ip):
     try:
         # Get the current service object
         service = await v1.read_namespaced_service(service_name, NAMESPACE)
 
         # Check if the annotation needs to be updated
         current_annotation = service.metadata.annotations.get(ANNOTATION_KEY)
-        target_annotation = ",".join(external_ips) + "," + ZERO_GATEWAY_IP
+        target_annotation = ",".join({external_ip, ZERO_GATEWAY_IP})
         if current_annotation != target_annotation:
             # Update the annotation
             body = {"metadata": {"annotations": {ANNOTATION_KEY: target_annotation}}}
@@ -44,22 +39,21 @@ async def watch_nodes():
     while True:
         try:
             async for event in w.stream(
-                v1.list_node,
-                label_selector=NODE_LABEL,
-                _request_timeout=NODE_REQUEST_TIMEOUT,
+                v1.list_node, label_selector=NODE_LABEL, _request_timeout=300
             ):
                 node = event["object"]
                 node_name = node.metadata.name
 
                 # Check for external IP
-                external_ips = []
+                external_ip = None
                 for address in node.status.addresses:
                     if address.type == "ExternalIP":
-                        external_ips.append(address.address)
+                        external_ip = address.address
+                        break
 
-                if len(external_ips) > 0:
+                if external_ip:
                     print(
-                        f"Detected external IP {str(external_ips)} for node {node_name}",
+                        f"Detected external IP {external_ip} for node {node_name}",
                         flush=True,
                     )
 
@@ -70,7 +64,7 @@ async def watch_nodes():
                     service = await v1.read_namespaced_service(SERVICE_NAME, NAMESPACE)
                     # for service in services.items:
                     await update_service_annotation(
-                        v1, service.metadata.name, external_ips
+                        v1, service.metadata.name, external_ip
                     )
 
         except client.exceptions.ApiException as e:
@@ -97,7 +91,7 @@ async def watch_services():
                 v1.list_namespaced_service,
                 NAMESPACE,
                 label_selector=SERVICE_NAME_LABEL_PATTERN,
-                _request_timeout=SERVICE_REQUEST_TIMEOUT,
+                _request_timeout=300,
             ):
                 service = event["object"]
                 service_name = service.metadata.name