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