bashANYoutputcustom-columns
bash
kubectl get pods -n payments -o custom-columns=NAME:.metadata.name,PHASE:.status.phase,NODE:.spec.nodeName,IP:.status.podIPRender table output with selected fields.
Kubernetes Troubleshooting Cheat Sheet
Debugging, inspection, RBAC checks, rollout failures, node health, and maintenance-oriented kubectl workflows.
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Inspection and Deep Queries
Query cluster state efficiently.
bashANYoutputjson
bash
kubectl get deployment web -n payments -o jsonDump a resource as JSON.
bashANYoutputyaml
bash
kubectl get deployment web -n payments -o yamlDump a resource as YAML.
bashANYgetsort
bash
kubectl get pods -n payments --sort-by=.status.startTimeSort list output by a JSONPath-like field.
bashANYfield-selectorfilter
bash
kubectl get pods -A --field-selector=status.phase!=RunningFilter server-side using field selectors.
bashANYselectorlabels
bash
kubectl get pods -n payments -l 'app=web,component=api'Filter resources using labels.
bashANYscriptingoutput
bash
kubectl get pods -n payments --no-headersSuppress table headers for scripting.
bashANYscriptingoutput
bash
kubectl get pods -n payments -o nameReturn resource identifiers only.
Debugging Pods and Containers
Interactive and ephemeral debugging workflows.
bashANYdebugnode
bash
kubectl debug node/worker-02 -it --image=busybox:1.36Launch a debugging pod on a node.
bashANYdebugpod
bash
kubectl debug web-abc123 -n payments --copy-to=web-debug --container=web -- shCreate a debug copy of a pod.
bashANYdebugephemeral-container
bash
kubectl debug -it web-abc123 -n payments --image=nicolaka/netshoot --target=webInject an ephemeral debug container into a running pod.
bashANYrbacauth
bash
kubectl auth can-i create deployments -n paymentsAsk the API server whether an action is allowed.
bashANYrbacauthimpersonation
bash
kubectl auth can-i get secrets -n payments --as=system:serviceaccount:payments:webTest RBAC from another subject's perspective.
bashANYpodconditionsjsonpath
bash
kubectl get pod web-abc123 -n payments -o jsonpath='{range .status.conditions[*]}{.type}{"="}{.status}{"
"}{end}'Print pod condition states.
bashANYdebugdescribe
bash
kubectl describe pods -n payments -l app=workerInspect all matching pods for failure clues.
Rollout and Scheduling Failures
Diagnose stuck updates and unschedulable pods.
bashANYschedulingpending
bash
kubectl get pods -A --field-selector=status.phase=PendingFind pods waiting to schedule or start.
bashANYschedulingdescribe
bash
kubectl describe pod pending-pod -n paymentsLook for failed scheduling and image pull events.
bashANYnodeconditions
bash
kubectl get nodes -o custom-columns=NAME:.metadata.name,READY:.status.conditions[?(@.type=="Ready")].status,MEMORYPRESSURE:.status.conditions[?(@.type=="MemoryPressure")].status,DISKPRESSURE:.status.conditions[?(@.type=="DiskPressure")].statusCheck high-level node health indicators.
bashANYrolloutpause
bash
kubectl rollout pause deployment/web -n paymentsTemporarily pause a deployment rollout.
bashANYrolloutresume
bash
kubectl rollout resume deployment/web -n paymentsResume a paused deployment rollout.
bashANYpdbget
bash
kubectl get pdb -AShow PodDisruptionBudgets.
bashANYpdbdescribe
bash
kubectl describe pdb web -n paymentsInspect disruption constraints that may block eviction.
Cluster Maintenance and Cleanup
Bulk cleanup and namespace triage patterns.
bashANYcleanupevicted
bash
kubectl get pods -A --field-selector=status.phase=Failed | grep Evicted | awk '{print $1, $2}'Pattern to find evicted pods for cleanup.
bashANYcleanupjobs
bash
kubectl delete jobs -n ops --field-selector=status.successful=1Clean up successful Jobs when appropriate.
bashANYfinalizersnamespace
bash
kubectl get namespace stuck-ns -o jsonpath='{.spec.finalizers}'See whether finalizers are blocking deletion.
bashANYapirawhealth
bash
kubectl get --raw='/healthz?verbose'Read API server health information.
bashANYapirawhealth
bash
kubectl get --raw='/readyz?verbose'Read API server readiness information.
Get component statuses (legacy)
Legacy command seen on older clusters; modern clusters rely on health endpoints and metrics.
bashANYcomponentstatuseslegacy
bash
kubectl get componentstatusesLegacy command seen on older clusters; modern clusters rely on health endpoints and metrics.
More in Kubernetes
kubeadm Cheat Sheet
Bootstrap, join, cert, kubeconfig, reset, phase, image, and upgrade commands for kubeadm-managed clusters.
Kubernetes JSONPath and Kustomize Cheat Sheet
JSONPath recipes, custom output patterns, jq/yq workflows, and Kustomize commands supported by kubectl.
Kubernetes Networking, Storage, and Config Cheat Sheet
Services, ingress, EndpointSlices, network policies, PVCs, PVs, storage classes, ConfigMaps, Secrets, and nodes.
Kubernetes Workloads Cheat Sheet
Deployments, StatefulSets, DaemonSets, Jobs, CronJobs, autoscaling, rollouts, and workload maintenance.
Kubernetes & kubectl Cheat Sheet
Comprehensive kubectl commands for contexts, resources, apply flows, creation, deletion, logs, and cluster introspection.
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