Error map

Metrics API not available error: Metrics API not available / HPA: unable to get metrics for resource cpu

Kubernetes · layer 6, Platform & cloud

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Centre: this error. First ring: errors it is linked with (7). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.

Metrics API not available — error: Metrics API not available / HPA: unable to get metrics for resource cpu (Kubernetes)Metrics API…admission webhook denied the request — Error from server: admission webhook "validate.nginx.ingress.kubernetes.io" denied the request (Kubernetes)admission webhook d…CrashLoopBackOff — Kubernetes: CrashLoopBackOff (Kubernetes)CrashLoopBackOffCreateContainerConfigError — Kubernetes: CreateContainerConfigError — secret / configmap not found (Kubernetes)CreateContainerConf…CreateContainerError — Pod status CreateContainerError (Kubernetes)CreateContainerErroris waiting to start — Error from server (BadRequest): container "x" in pod "y" is waiting to start: ContainerCreating (Kubernetes)is waiting to startmust specify limits — pods is forbidden: failed quota: must specify limits.cpu,limits.memory,requests.cpu,requests.memory (Kubernetes)must specify limitsnamespace Terminating — Namespace stuck in Terminating (Kubernetes)namespace Terminati…Readiness probe failed — Readiness probe failed: HTTP probe failed with statuscode: 503 / connect: connection refused (Kubernetes)Readiness probe fai…Liveness probe failed — Liveness probe failed ... Container will be restarted (also Startup probe failed) (Kubernetes)Liveness probe fail…NotReady — Kubernetes node NotReady (Kubelet stopped posting node status) (Kubernetes)NotReadyENOSPC — no space left on device (Docker / Linux) (Docker)ENOSPCImagePullBackOff — Kubernetes: ImagePullBackOff / ErrImagePull (Kubernetes)ImagePullBackOffOOMKilled — Kubernetes: OOMKilled (exit code 137) (Kubernetes)OOMKilledKeyError — KeyError: 'x' (Python)KeyErrorFailedScheduling — Kubernetes: Pod stuck in Pending — FailedScheduling: 0/3 nodes are available (Kubernetes)FailedSchedulingdivergent branches — hint: You have divergent branches and need to specify how to reconcile them. (Git)divergent branchesexecutable file not found in $PATH — OCI runtime create failed: exec: "x": executable file not found in $PATH (Docker)executable file not…InvalidImageName — Pod status InvalidImageName: couldn't parse image reference (Kubernetes)InvalidImageNameRunContainerError — Pod status RunContainerError (Kubernetes)RunContainerError500 — HTTP 500 Internal Server Error (HTTP)500499 — HTTP 499 Client Closed Request (Nginx) (HTTP)499kubectl connection refused — kubectl: The connection to the server localhost:8080 was refused — did you specify the right host or port? (Kubernetes)kubectl connection …ThrottlingException — AWS: ThrottlingException / Rate exceeded (AWS)ThrottlingExceptionSkuNotAvailable — Azure: SkuNotAvailable / QuotaExceeded when creating a VM or resource (Azure)SkuNotAvailableEvicted — Kubernetes: Pod Evicted — The node was low on resource: memory / ephemeral-storage (Kubernetes)EvictedTerminating — Pod stuck in Terminating state (Kubernetes)TerminatingNo resources found — No resources found in default namespace (Kubernetes)No resources foundNotFound — Error from server (NotFound): deployments.apps "x" not found (Kubernetes)NotFound

Directly related (7)

admission webhook denied the requestKubernetes

Error from server: admission webhook "validate.nginx.ingress.kubernetes.io" denied the request

A validating admission webhook (ingress-nginx, Gatekeeper/OPA, Kyverno) inspected your object and rejected it; the reason follows…

CrashLoopBackOffKubernetes

Kubernetes: CrashLoopBackOff

The container starts, crashes (or exits), and Kubernetes keeps restarting it with increasing back-off delays.

CreateContainerConfigErrorKubernetes

Kubernetes: CreateContainerConfigError — secret / configmap not found

Kubernetes can’t build the container’s configuration — usually a referenced Secret, ConfigMap or key doesn’t exist in that namesp…

CreateContainerErrorKubernetes

Pod status CreateContainerError

The image was pulled, but the container runtime failed to create the container — bad command, missing mount target, or a name/vol…

is waiting to startKubernetes

Error from server (BadRequest): container "x" in pod "y" is waiting to start: ContainerCreating

kubectl logs has nothing to show yet — the container hasn’t started (still creating, pulling, or blocked).

must specify limitsKubernetes

pods is forbidden: failed quota: must specify limits.cpu,limits.memory,requests.cpu,requests.memory

A ResourceQuota on the namespace covers CPU/memory, so every pod must declare those requests/limits — and this one doesn’t.

namespace TerminatingKubernetes

Namespace stuck in Terminating

A deleted namespace never disappears because some resource inside it, or the namespace’s own finalizer, can’t be cleaned up.

Two steps away (21)

Readiness probe failedKubernetes

Readiness probe failed: HTTP probe failed with statuscode: 503 / connect: connection refused

The container is running, but its readiness check fails, so the pod is marked not ready and removed from Service endpoints.

Liveness probe failedKubernetes

Liveness probe failed ... Container will be restarted (also Startup probe failed)

The kubelet’s liveness (or startup) check failed enough times that it killed and restarted the container.

NotReadyKubernetes

Kubernetes node NotReady (Kubelet stopped posting node status)

The control plane hasn’t heard from a node’s kubelet, or the kubelet reports a problem — pods there stop being scheduled and are…

ENOSPCDocker

no space left on device (Docker / Linux)

The disk (or inode table) is full — Docker images, build cache, logs and volumes are common culprits.

ImagePullBackOffKubernetes

Kubernetes: ImagePullBackOff / ErrImagePull

The node can’t pull the container image — wrong name/tag, missing registry credentials, or registry unreachable.

OOMKilledKubernetes

Kubernetes: OOMKilled (exit code 137)

The container used more memory than its limit, and the kernel killed it.

KeyErrorPython

KeyError: 'x'

You accessed a dictionary key that doesn’t exist.

FailedSchedulingKubernetes

Kubernetes: Pod stuck in Pending — FailedScheduling: 0/3 nodes are available

The scheduler can’t find a node that satisfies the pod’s resource requests, selectors, taints or volume constraints.

divergent branchesGit

hint: You have divergent branches and need to specify how to reconcile them.

Git 2.27+ asks you to choose merge, rebase or fast-forward-only when local and remote both have new commits.

executable file not found in $PATHDocker

OCI runtime create failed: exec: "x": executable file not found in $PATH

The command you asked the container to run doesn’t exist inside the image — wrong command name, a shell that isn’t installed (bas…

InvalidImageNameKubernetes

Pod status InvalidImageName: couldn't parse image reference

The image field in the pod spec isn’t a valid image reference, so the kubelet can’t even try to pull it.

RunContainerErrorKubernetes

Pod status RunContainerError

The container was created but failed to start — usually an invalid command/entrypoint, missing interpreter, or permission problem…

500HTTP

HTTP 500 Internal Server Error

The server hit an unexpected condition — usually an unhandled exception or misconfiguration in the application.

499HTTP

HTTP 499 Client Closed Request (Nginx)

Nginx-specific code logged when the client disconnected before the server finished responding.

kubectl connection refusedKubernetes

kubectl: The connection to the server localhost:8080 was refused — did you specify the right host or port?

kubectl has no usable kubeconfig, so it falls back to localhost:8080 — or the cluster API server is unreachable.

ThrottlingExceptionAWS

AWS: ThrottlingException / Rate exceeded

You exceeded the request rate for an AWS API; retry with exponential backoff.

SkuNotAvailableAzure

Azure: SkuNotAvailable / QuotaExceeded when creating a VM or resource

The VM size isn’t offered in that region/zone for your subscription, or you’ve hit the vCPU quota.

EvictedKubernetes

Kubernetes: Pod Evicted — The node was low on resource: memory / ephemeral-storage

The kubelet removed the pod because its node ran short of memory or disk.

TerminatingKubernetes

Pod stuck in Terminating state

kubectl delete pod hangs and the pod shows Terminating for minutes or forever.

No resources foundKubernetes

No resources found in default namespace

Not an error: kubectl found nothing of that kind in the namespace it looked in — usually because the resources are in another nam…

NotFoundKubernetes

Error from server (NotFound): deployments.apps "x" not found

The named object doesn’t exist in the namespace/cluster kubectl is pointing at.