update(k8s): calculate namespace usage

app/routes/k8s.py

@@ -1,33 +1,60 @@
 from fastapi import APIRouter
 from kubernetes import client, config
+import math
 
 router = APIRouter()
 
-# Initialize Kubernetes client
+def fetch_k8s_data_with_usage():
-def init_k8s_client():
-    try:
     config.load_incluster_config()
-    except:
-        config.load_kube_config()  # local testing
-
-@router.get("/k8s/data")
-def get_k8s_data():
-    init_k8s_client()
     v1 = client.CoreV1Api()
+    metrics_client = client.CustomObjectsApi()
 
-    # Fetch nodes
+    # Fetch nodes and namespaces
-    nodes = v1.list_node()
+    nodes = [{
-    node_data = []
-    for node in nodes.items:
-        node_data.append({
         "node_name": node.metadata.name,
         "cpu": node.status.capacity.get("cpu"),
         "memory": node.status.capacity.get("memory"),
         "pods_allocatable": node.status.allocatable.get("pods"),
-        })
+    } for node in v1.list_node().items]
 
-    # Fetch namespaces
+    namespaces = [ns.metadata.name for ns in v1.list_namespace().items]
-    namespaces = v1.list_namespace()
-    namespace_data = [ns.metadata.name for ns in namespaces.items]
 
-    return {"nodes": node_data, "namespaces": namespace_data}
+    # Fetch pod metrics and calculate namespace resource usage
+    namespace_usage = {}
+    pod_metrics = metrics_client.list_namespaced_custom_object(
+        group="metrics.k8s.io", version="v1beta1", namespace="", plural="pods"
+    )
+    for pod in pod_metrics["items"]:
+        pod_namespace = pod["metadata"]["namespace"]
+        if pod_namespace not in namespace_usage:
+            namespace_usage[pod_namespace] = {"cpu": 0, "memory": 0}
+
+        for container in pod["containers"]:
+            cpu_usage = container["usage"]["cpu"]
+            memory_usage = container["usage"]["memory"]
+
+            # Convert CPU to millicores and memory to MiB
+            namespace_usage[pod_namespace]["cpu"] += convert_cpu_to_millicores(cpu_usage)
+            namespace_usage[pod_namespace]["memory"] += convert_memory_to_mib(memory_usage)
+
+    return {"nodes": nodes, "namespaces": namespaces, "namespace_usage": namespace_usage}
+
+def convert_cpu_to_millicores(cpu):
+    if "n" in cpu:
+        return int(cpu.replace("n", "")) / 1e6
+    elif "m" in cpu:
+        return int(cpu.replace("m", ""))
+    return int(cpu) * 1000
+
+def convert_memory_to_mib(memory):
+    if "Ki" in memory:
+        return int(memory.replace("Ki", "")) / 1024
+    elif "Mi" in memory:
+        return int(memory.replace("Mi", ""))
+    elif "Gi" in memory:
+        return int(memory.replace("Gi", "")) * 1024
+    return int(memory)
+
+@router.get("/k8s/data")
+def get_k8s_data():
+    return fetch_k8s_data_with_usage()