"Failed to scrape node" errors after node termination or newly created

[jstefankowski]

What happened:
Metrics-server 0.7.1 logs "Failed to scrape node" up to 2 minutes after a karpenter node is terminated or created.

What you expected to happen:
Do not log errors when EKS node is not ready to be scraped, when it is either already in Shutting-down/Terminated state or newly created.

Anything else we need to know?:
Example: Node ip-10-108-180-80.us-east-2.compute.internal was shut down but metrics servers kept logging errors for 2 minutes, every 15 seconds (--metric-resolution=15s)

See example log:
{"ts":1755621037144.3723,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621052196.1824,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621067156.2139,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621082187.7395,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621097153.6978,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621112118.9421,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621127189.2578,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621142189.1562,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621157130.2832,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621172130.848,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "

Environment:

• Kubernetes distribution (GKE, EKS, Kubeadm, the hard way, etc.):
  EKS

• Container Network Setup (flannel, ca3lico, etc.):
  calico, coredns, ebs-csi-controller, r53-external-dns, karpenter,

• Kubernetes version (use kubectl version):
  1.31

• Metrics Server manifest
  apiVersion: v1
  kind: ServiceAccount
  metadata:
  labels:
  k8s-app: metrics-server
  name: metrics-server
  namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
rbac.authorization.k8s.io/aggregate-to-admin: "true"
rbac.authorization.k8s.io/aggregate-to-edit: "true"
rbac.authorization.k8s.io/aggregate-to-view: "true"
name: system:aggregated-metrics-reader
rules:

• apiGroups:
  • metrics.k8s.io
    resources:
  • pods
  • nodes
    verbs:
  • get
  • list
  • watch---
    apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRole
    metadata:
    labels:
    k8s-app: metrics-server
    name: system:metrics-server
    rules:
• apiGroups:
  • ""
    resources:
  • nodes/metrics
    verbs:
  • get
• apiGroups:
  • ""
    resources:
  • pods
  • nodes
  • nodes/stats
  • namespaces
  • configmaps
    verbs:
  • get
  • list
  • watch

apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server-auth-reader
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: extension-apiserver-authentication-reader
subjects:

• kind: ServiceAccount
  name: metrics-server
  namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server:system:auth-delegator
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:auth-delegator
subjects:

• kind: ServiceAccount
  name: metrics-server
  namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:metrics-server
subjects:

• kind: ServiceAccount
  name: metrics-server
  namespace: kube-system

apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
ports:

• name: https
  port: 443
  protocol: TCP
  targetPort: https
  selector:
  k8s-app: metrics-server

apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: metrics-server
app: ${metrics_server_label_app}
owner: ${metrics_server_label_owner}
department: ${metrics_server_label_department}
team: ${metrics_server_label_team}
name: metrics-server
namespace: kube-system
spec:
selector:
matchLabels:
k8s-app: metrics-server
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
k8s-app: metrics-server
app: ${metrics_server_label_app}
owner: ${metrics_server_label_owner}
department: ${metrics_server_label_department}
team: ${metrics_server_label_team}
spec:
tolerations:
- key: "apps"
operator: "Equal"
value: "corecomponents"
effect: "NoSchedule"
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: node.kubernetes.io/lifecycle
operator: In
values:
- ondemand_components
containers:
- args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --logging-format=json
image: ${repo}:${image_tag}
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /livez
port: https
scheme: HTTPS
periodSeconds: 10
name: metrics-server
ports:
- containerPort: 4443
name: https
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /readyz
port: https
scheme: HTTPS
initialDelaySeconds: 20
periodSeconds: 10
resources:
requests:
cpu: 100m
memory: 200Mi
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
volumeMounts:
- mountPath: /tmp
name: tmp-dir
nodeSelector:
kubernetes.io/os: linux
hostNetwork: true
priorityClassName: system-cluster-critical
serviceAccountName: metrics-server
volumes:
- emptyDir: {}
name: tmp-dir

apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
labels:
k8s-app: metrics-server
name: v1beta1.metrics.k8s.io
spec:
group: metrics.k8s.io
groupPriorityMinimum: 100
insecureSkipTLSVerify: true
service:
name: metrics-server
namespace: kube-system
version: v1beta1
versionPriority: 100

• Kubelet config:
  cat /etc/kubernetes/kubelet/config.json
  {
  "address": "0.0.0.0",
  "authentication": {
  "x509": {
  "clientCAFile": "/etc/kubernetes/pki/ca.crt"
  },
  "webhook": {
  "enabled": true,
  "cacheTTL": "2m0s"
  },
  "anonymous": {
  "enabled": false
  }
  },
  "authorization": {
  "mode": "Webhook",
  "webhook": {
  "cacheAuthorizedTTL": "5m0s",
  "cacheUnauthorizedTTL": "30s"
  }
  },
  "cgroupDriver": "systemd",
  "cgroupRoot": "/",
  "clusterDNS": [
  "172.20.0.10"
  ],
  "clusterDomain": "cluster.local",
  "containerRuntimeEndpoint": "unix:///run/containerd/containerd.sock",
  "evictionHard": {
  "memory.available": "100Mi",
  "nodefs.available": "10%",
  "nodefs.inodesFree": "5%"
  },
  "featureGates": {
  "RotateKubeletServerCertificate": true
  },
  "hairpinMode": "hairpin-veth",
  "kubeReserved": {
  "cpu": "90m",
  "ephemeral-storage": "1Gi",
  "memory": "893Mi"
  },
  "kubeReservedCgroup": "/runtime",
  "logging": {
  "verbosity": 2
  },
  "maxPods": 58,
  "protectKernelDefaults": true,
  "providerID": "aws:///us-east-2a/i-077c3432936e48858",
  "readOnlyPort": 0,
  "serializeImagePulls": false,
  "serverTLSBootstrap": true,
  "systemReservedCgroup": "/system",
  "tlsCipherSuites": [
  "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
  "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
  "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305",
  "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
  "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
  "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305",
  "TLS_RSA_WITH_AES_128_GCM_SHA256",
  "TLS_RSA_WITH_AES_256_GCM_SHA384"
  ],
  "kind": "KubeletConfiguration",
  "apiVersion": "kubelet.config.k8s.io/v1beta1"

• Metrics server logs:

{"ts":1755621037144.3723,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621042104.129,"caller":"scraper/scraper.go:149","msg":"Failed to scrape node","node":{"name":"ip-10-108-162-175.us-east-2.compute.internal"},"err":"Get "https://10.108.162.175:10250/metrics/resource\": remote error: tls: internal error"}
{"ts":1755621042162.523,"caller":"scraper/scraper.go:149","msg":"Failed to scrape node","node":{"name":"ip-10-108-54-32.us-east-2.compute.internal"},"err":"Get "https://10.108.54.32:10250/metrics/resource\": remote error: tls: internal error"}
{"ts":1755621052196.1824,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621067156.2139,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621082187.7395,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621097153.6978,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621112118.9421,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621127189.2578,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621142189.1562,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621157130.2832,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621172130.848,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-180-80.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.180.80:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621742166.749,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-161-50.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.161.50:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621757185.5354,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-161-50.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.161.50:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621762140.344,"caller":"scraper/scraper.go:149","msg":"Failed to scrape node","node":{"name":"ip-10-108-183-190.us-east-2.compute.internal"},"err":"Get "https://10.108.183.190:10250/metrics/resource\": remote error: tls: internal error"}
{"ts":1755621772153.691,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-161-50.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.161.50:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621787177.745,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-161-50.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.161.50:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621802095.0845,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-161-50.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.161.50:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621817115.6096,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-161-50.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.161.50:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621832201.8843,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-161-50.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.161.50:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621882168.9373,"caller":"scraper/scraper.go:149","msg":"Failed to scrape node","node":{"name":"ip-10-108-178-221.us-east-2.compute.internal"},"err":"Get "https://10.108.178.221:10250/metrics/resource\": remote error: tls: internal error"}
{"ts":1755621892168.5889,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-183-190.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.183.190:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621897133.5642,"caller":"scraper/scraper.go:149","msg":"Failed to scrape node","node":{"name":"ip-10-108-166-232.us-east-2.compute.internal"},"err":"Get "https://10.108.166.232:10250/metrics/resource\": dial tcp 10.108.166.232:10250: connect: connection refused"}
{"ts":1755621907144.9084,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-183-190.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.183.190:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621922085.854,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-166-232.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.166.232:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621952125.9766,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-183-190.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.183.190:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621967104.593,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-183-190.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.183.190:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755621997106.5833,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-178-221.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.178.221:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755622012187.4453,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-178-221.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.178.221:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755622182161.2349,"caller":"scraper/scraper.go:149","msg":"Failed to scrape node","node":{"name":"ip-10-108-54-32.us-east-2.compute.internal"},"err":"Get "https://10.108.54.32:10250/metrics/resource\": dial tcp 10.108.54.32:10250: connect: connection refused"}
{"ts":1755622207109.7744,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-54-32.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.54.32:10250/metrics/resource\": context deadline exceeded"}
{"ts":1755622222112.0771,"caller":"scraper/scraper.go:147","msg":"Failed to scrape node, timeout to access kubelet","node":{"name":"ip-10-108-54-32.us-east-2.compute.internal"},"timeout":"10s","err":"Get "https://10.108.54.32:10250/metrics/resource\": context deadline exceeded"}

• Status of Metrics API:
  kubectl describe apiservice v1beta1.metrics.k8s.io

kubectl describe apiservice v1beta1.metrics.k8s.i
Name: v1beta1.metrics.k8s.io
Namespace:
Labels: k8s-app=metrics-server
Annotations:
API Version: apiregistration.k8s.io/v1
Kind: APIService
Metadata:
Creation Timestamp: 2022-07-29T08:29:06Z
Resource Version: 1171407047
UID: 1c1f0d23-9bbb-4c3e-bb99-21a7b34a0115
Spec:
Group: metrics.k8s.io
Group Priority Minimum: 100
Insecure Skip TLS Verify: true
Service:
Name: metrics-server
Namespace: kube-system
Port: 443
Version: v1beta1
Version Priority: 100
Status:
Conditions:
Last Transition Time: 2025-08-18T12:38:24Z
Message: all checks passed
Reason: Passed
Status: True
Type: Available
Events:

/kind bug

[k8s-ci-robot]

This issue is currently awaiting triage.

If metrics-server contributors determine this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

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