kubernetes.cheat

% kubectl cheats

# get node info
kubectl get nodes -o wide



## echo Y3VybCBodHRwczovL2JhbHRvY2RuLmNvbS9oZWxtL3NpZ25pbmcuYXNjIHwgc3VkbyBhcHQta2V5IGFkZCAtCnN1ZG8gYXB0LWdldCBpbnN0YWxsIGFwdC10cmFuc3BvcnQtaHR0cHMgLS15ZXMKZWNobyAiZGViIGh0dHBzOi8vYmFsdG9jZG4uY29tL2hlbG0vc3RhYmxlL2RlYmlhbi8gYWxsIG1haW4iIHwgc3VkbyB0ZWUgL2V0Yy9hcHQvc291cmNlcy5saXN0LmQvaGVsbS1zdGFibGUtZGViaWFuLmxpc3QKc3VkbyBhcHQtZ2V0IHVwZGF0ZQpzdWRvIGFwdC1nZXQgaW5zdGFsbCBoZWxtCg== | base64 -d | sh

# download helm3 (debian) multiline download
curl https://baltocdn.com/helm/signing.asc | sudo apt-key add -
sudo apt-get install apt-transport-https --yes
echo "deb https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list
sudo apt-get update
sudo apt-get install helm

# disable node spawning on master(s)
kubectl get nodes -o wide | grep master | cut -d ' ' -f 1  | xargs -I {} kubectl taint nodes {} node-role.kubernetes.io/master=:NoSchedule



# Print all contexts
kubectl config get-contexts

# Print current context of kubeconfig
kubectl config current-context

# Set context of kubeconfig
kubectl config use-context <context>

# Print resource documentation
kubectl explain <resource>

# Get nodes (add option '-o wide' for details)
kubectl get nodes

# Get namespaces
kubectl get namespaces

# Get pods from namespace (add option '-o wide' for details)
kubectl get pods -n <namespace>

# Get pods from all namespace (add option '-o wide' for details)
kubectl get pods --all-namespaces

# Get services from namespace
kubectl get services -n <namespace>

# Get details from resource on namespace
kubectl describe <resource>/<name> -n <namespace>

# Print logs from namespace
kubectl logs -f pods/<name> -n <namespace>

# Get deployments
kubectl get deployments -n <namespace>

# Edit deployments
kubectl edit deployment/<name> -n <namespace>

# Drain node in preparation for maintenance
kubectl drain <name>

# Mark node as schedulable
kubectl uncordon <name>

# Mark node as unschedulable
kubectl cordon <name>

# Display resource (cpu/memory/storage) usage
kubectl top <type>

# List the namespaces in the current context
kubens

# Change the active namespace of current context
kubens <namespaces>

# Switch to the previous namespace in this context
kubens -

# Show the current namespace
kubens -c

$ namespaces: kubens --- --headers 1 --column 3