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Kubernetes kubectl reference
Viewing / Accessing resources
kubectl get --all-namespaces {resource_type}
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Get resource from all namespaces |
kubectl describe {resource_type}
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Describes the given resources |
kubectl rolling-update {pod_name}
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Performs a rolling update for a given pod |
kubectl scale --replicas=3 {resource_type}/{resource_name}
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Scale given resource |
kubectl proxy
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Proxy the api server API to your local machine on port 8001 |
kubectl port-forward {pod_name} {local_port}:{remote_port}
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Forward the pod port to your local port |
Creating /editing objects
kubectl apply -f ./my-manifest.yaml
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Apply a configuration to a resource by filename or stdin. Also overrides the existing configuration. |
kubectl create -f ./my-manifest.yaml
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Create resource(s) |
kubectl create -f ./dir
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Create resource(s) in all manifest files in dir |
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Create from url |
kubectl run nginx --image=nginx
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Start a single instance of nginx |
kubectl replace --force -f ./pod.json
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Force replace, delete and then re-create the resource. Will cause a service outage. |
kubectl edit svc/docker-registry
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Edit the service named docker-registry |
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Resource types
configmaps
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ConfigMaps allow you to decouple configuration artifacts from image content to keep containerized applications portable. |
daemonsets
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A DaemonSet ensures that all (or some) Nodes run a copy of a Pod. |
deployments
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A Deployment controller provides declarative updates for Pods and ReplicaSets. |
ingresses
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An Ingress is a collection of rules that allow inbound connections to reach the cluster services. |
jobs
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A job creates one or more pods and ensures that a specified number of them successfully terminate. |
namespaces
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Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called namespaces. |
nodes
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Nodes are the physical cluster nodes. |
persistentvolumeclaims
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A PersistentVolumeClaim (PVC) is a request for storage by a user. |
persistentvolumes
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A PersistentVolume (PV) is a piece of storage in the cluster that has been provisioned by an administrator. |
pods
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A Pod is the basic building block of Kubernetes–the smallest and simplest unit in the Kubernetes object model that you create or deploy. |
replicasets
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A ReplicaSet ensures that a specified number of pod replicas are running at any one time. |
cronjob
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A Cron Job manages time based Jobs. |
secrets
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Objects of type secret are intended to hold sensitive information. |
services
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A Kubernetes Service is an abstraction which defines a logical set of Pods and a policy by which to access them. |
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