79 lines
2.7 KiB
Python
79 lines
2.7 KiB
Python
from fastapi import APIRouter
|
|
from kubernetes import client, config
|
|
import math
|
|
|
|
router = APIRouter()
|
|
|
|
def fetch_k8s_data_with_usage():
|
|
config.load_incluster_config() # Use in-cluster configuration
|
|
v1 = client.CoreV1Api()
|
|
metrics_client = client.CustomObjectsApi()
|
|
|
|
# Fetch nodes
|
|
nodes = [{
|
|
"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]
|
|
|
|
# Fetch pod metrics and calculate namespace resource usage
|
|
namespace_usage = {}
|
|
pod_metrics = metrics_client.list_cluster_custom_object(
|
|
group="metrics.k8s.io", version="v1beta1", 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)
|
|
|
|
# Convert usage to serializable types
|
|
namespace_usage = {
|
|
ns: {
|
|
"cpu": round(usage["cpu"], 2), # Round to 2 decimal places for readability
|
|
"memory": round(usage["memory"], 2),
|
|
}
|
|
for ns, usage in namespace_usage.items()
|
|
}
|
|
|
|
return {"nodes": nodes, "namespaces": namespaces, "namespace_usage": namespace_usage}
|
|
|
|
|
|
def convert_cpu_to_millicores(cpu):
|
|
"""
|
|
Convert CPU usage to millicores (m).
|
|
Handles units: n (nano), u (micro), m (milli), or none (cores).
|
|
"""
|
|
if "n" in cpu: # Convert nanocores to millicores
|
|
return int(cpu.replace("n", "")) / 1e6
|
|
elif "u" in cpu: # Convert microcores to millicores
|
|
return int(cpu.replace("u", "")) / 1e3
|
|
elif "m" in cpu: # Already in millicores
|
|
return int(cpu.replace("m", ""))
|
|
return float(cpu) * 1000 # Convert cores to millicores
|
|
|
|
|
|
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 float(memory)
|
|
|
|
@router.get("/k8s/data")
|
|
def get_k8s_data():
|
|
return fetch_k8s_data_with_usage()
|