kubernetes Getting started with kubernetes Kubectl in command line

Example

After you have a running cluster you can manage it with the kubectl command. Most of the commands you can get with the kubectl --help command, but I show you the most common commands, for manage and getting info about your cluster, nodes, pods, services and labels.

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For getting information about the cluster you can user the following command

kubectl cluster-info

It will show you the running address and port.

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For getting short information about the nodes, pods, services, etc. or any resources which got a place on the cluster you can use the following command

kubectl get {nodes, pods, services, ...}

The output mostly one line per resource.

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For getting detailed description about the resources you can use the describe flag for the kubectl

kubectl describe {nodes, pods, ...}

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The deployed apps are only visible inside the cluster, so if you want to get the output from outside the cluster you should create a route between the terminal and kubernetes cluster.

kubectl proxy

It will open a API, where we can get everything from the cluster. If you want to get the name of the pods for getting information about, you should use the following command:

kubectl get pods -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}'

It will list the pods for later usage.

curl http://localhost:8001/api/v1/proxy/namespaces/default/pods/{pod_name}/

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Two other common command is the getting logs and the execute a command from/in the containerized app.

kubectl logs {pod_name}
kubectl exec {pod_name} {command}

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Configuring tab completion for your shell can be done with:

source <(kubectl completion zsh)   # if you're using zsh
source <(kubectl completion bash)  # if you're using bash

or more programatically:

source <(kubectl completion "${0/-/}")