mirror of
https://github.com/namibia/awesome-cheatsheets.git
synced 2024-06-07 06:50:47 +00:00
60 lines
4.0 KiB
Bash
60 lines
4.0 KiB
Bash
##############################################################################
|
|
# KUBERNETES
|
|
##############################################################################
|
|
|
|
##############################################################################
|
|
# CLIENT CONFIGURATION
|
|
##############################################################################
|
|
|
|
source <(kubectl completion bash) # Setup autocomplete in bash; bash-completion package should be installed first
|
|
kubectl config view # View Kubernetes config
|
|
kubectl config view -o jsonpath='{.users[?(@.name == "k8s")].user.password}' # View specific config items by json path
|
|
kubectl config set-credentials kubeuser/foo.kubernetes.com \ # Set credentials for foo.kuberntes.com
|
|
--username=kubeuser --password=kubepassword
|
|
|
|
##############################################################################
|
|
# VIEWING, FINDING RESOURCES
|
|
##############################################################################
|
|
|
|
kubectl get services # List all services in the namespace
|
|
kubectl get pods -o wide --all-namespaces # List all pods in all namespaces in wide format
|
|
kubectl get pods -o json # List all pods in json (or yaml) format
|
|
kubectl describe nodes my-node # Describe resource details (node, pod, svc)
|
|
kubectl get services --sort-by=.metadata.name # List services sorted by name
|
|
kubectl get pods --sort-by='.status.containerStatuses[0].restartCount' # List pods sorted by restart count
|
|
kubectl rolling-update frontend-v1 -f frontend-v2.json # Rolling update pods for frontend-v1
|
|
kubectl scale --replicas=3 rs/foo # Scale a replicaset named 'foo' to 3
|
|
kubectl scale --replicas=3 -f foo.yaml # Scale a resource specified in "foo.yaml" to 3
|
|
for i in 0 1; do kubectl exec foo-$i -- sh -c 'echo $(hostname) > /usr/share/nginx/html/index.html'; done # Execute a command in every pod / replica
|
|
|
|
##############################################################################
|
|
# MANAGE RESOURCES
|
|
##############################################################################
|
|
|
|
kubectl explain pods,svc # Get documentation for pod or service
|
|
kubectl create -f ./my-manifest.yaml # Create resource(s) like pods, services or daemonsets
|
|
kubectl apply -f ./my-manifest.yaml # Apply a configuration to a resource
|
|
kubectl run nginx --image=nginx # Start a single instance of Nginx
|
|
cat <<EOF | kubectl create -f -
|
|
apiVersion: v1
|
|
kind: Secret
|
|
metadata:
|
|
name: mysecret
|
|
type: Opaque
|
|
data:
|
|
password: $(echo "s33msi4" | base64)
|
|
username: $(echo "jane"| base64)
|
|
EOF # Create a secret with several keys
|
|
kubectl delete -f ./my-manifest.yaml # Delete a resource
|
|
|
|
##############################################################################
|
|
# MONITORING & LOGGING
|
|
##############################################################################
|
|
|
|
kubectl create -f deploy/kube-config/standalone/ # Deploy Heapster from Github repository
|
|
kubectl top node # Show metrics for nodes
|
|
kubectl top pod # Show metrics for pods
|
|
kubectl top pod pod_name --containers # Show metrics for a given pod and its containers
|
|
kubectl logs pod_name # Dump pod logs (stdout)
|
|
kubectl logs -f pod_name -c my-container # Stream pod container logs (stdout, multi-container case)
|