Kubernetes Cheatsheet

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# List all namespaces
kubectl get namespaces

# Create a namespace
kubectl create namespace [namespace_name]
kubectl create ns devops --context myContext

# Delete a namespace
kubectl delete namespace devops

# Set default namespace for current context
kubectl config set-context --current --namespace=devops

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# List pods
kubectl get pods -A                    # All namespaces
kubectl get po -A                      # Short form
kubectl get pods -n kube-system        # Specific namespace
kubectl get pods -o wide              # Detailed pod information
kubectl get pods --watch              # Watch pod status changes
kubectl get pods -l label_name        # Filter pods by label

# Pod management
kubectl logs -f pod_name              # Follow pod logs
kubectl logs pod_name                 # View pod logs
kubectl exec -it pod_name -- /bin/sh  # Shell into pod
kubectl delete pods pod_name          # Delete pod
kubectl edit pod pod_name             # Edit pod configuration
kubectl cp pod_name:/src/path local_path  # Copy from pod

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# View deployments and replicasets
kubectl get deployment
kubectl get rs

# Scale deployment
kubectl scale deploy deployment_name --replicas=3

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# List services
kubectl get services
kubectl get svc -w    # Watch service changes

# Get service details
kubectl get services -n namespace service_name -o yaml

# Access service (Minikube)
minikube service service_name --url
minikube service -n namespace_name service_name --url

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# Persistent Volumes
kubectl apply -f volume.yaml
kubectl get pv
kubectl delete pv pv_name

# Persistent Volume Claims
kubectl apply -f volumeClaim.yaml
kubectl get pvc
kubectl delete pvc pvc_name

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# ConfigMaps
kubectl get configmap
kubectl apply -f configmap.yaml

# Secrets
kubectl apply -f secret.yaml
kubectl get secrets
kubectl get secrets secret_name -o yaml
kubectl get docker-registry -o yaml

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# Get values from release
helm get values release_name

# Show and save chart values
helm show values repo/chart > values.yaml

# Upgrade release with values
helm upgrade release_name repo/chart --version x.y.z -f values.yaml

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kind: Role
rules:
- resources: ["pods", "services"]
  verbs: ["get", "list", "watch"]

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readinessProbe:
  exec:
    command:
      - health-check
      - get
      - status