Kubectl

Pass Config

Option	Description
~/.kube/config	file with the Kubernetes API address and the path to our TLS certificates used to authenticate
--kubeconfig	flag to pass a config file
--server, --user	directly

Commands (kubectl ...)

Cluster wide

Command	Description
cluster-info	Main installation
config view	Location and credentials that kubectl knows about
config get-contexts	List contexts
get componentstatus	Get component status
get secrets -o yaml	List all secrets (-o yaml is essential to get the actual values!)
get node	Look at the composition of our cluster
get node -o wide	More information
get node -o json	Build custom reports kubectl get nodes -o json | jq ".items[] | {name:.metadata.name} + .status.capacity"

Get

Command	Description
get all	List resources
get nodes	List nodes
get namespaces	List the namespaces on our cluster
get pods	List pods on our cluster
get deployments	List deployments
get services	List services on our cluster IP=$(kubectl get svc <name> -o go-template --template '{{ .spec.clusterIP }}')
get service <servicename> -o go-template='{{.spec.clusterIP}}' get service <servicename> -o go-template='{{(index .spec.ports 0).port}}'	Get service cluster IP and port
-n kube-system get pods	Switch to a different namespace (default otherwise)

Describe/Explain

Command	Description
describe <type>	View details about a resource
explain <type>	View the definition for a resource type
diff -f deployment.yaml	Check what would change before applying any updates
rollout history deployment/<name>	List deployment version history

Logs

Command	Description
logs <podname> logs <type/name> logs deploy/<name>	View container output (1 single pod) --follow = stream logs in real time (à la tail -f) --tail = indicate #lines you want to see (from the end) --since = get logs only after a given timestamp
logs -l run=<deployment_name>	View logs of multiple pods

Run/Scale

Command	Description
run <deployment_name> --image <alpine> <ping goog.gl>	Create a deployment
scale <type/name> --replicas <num>	Create additional copies of the pod
exec <pod-name> env	Check pod environment variables
exec -it <container-name> sh	Run command in a running pod
run --rm -it mytest --image=busybox --sh	Start a temporary pod

Services

Command	Description
expose deploy/<name> --port 9200	Create a ClusterIP service
port-forward svc/kubernetes-dashboard <LOCAL PORT>:<PORT IN K8S>	Temporarily add port forwarding