Install kubectl on linux

The following methods exist for installing kubectl on Linux:

Install kubectl binary with curl on Linux

  curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"

  curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl"

To download a specific version, replace the $(curl -L -s https://dl.k8s.io/release/stable.txt) portion of the command with the specific version.

For example, to download version 1.27.3 on Linux x86-64, type:

curl -LO https://dl.k8s.io/release/v1.27.3/bin/linux/amd64/kubectl

curl -LO https://dl.k8s.io/release/v1.27.0/bin/linux/arm64/kubectl

  curl -LO "https://dl.k8s.io/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl.sha256"

  curl -LO "https://dl.k8s.io/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl.sha256"

Validate the kubectl binary against the checksum file:

echo "$(cat kubectl.sha256) kubectl" | sha256sum --check

If the check fails, sha256 exits with nonzero status and prints output similar to:

kubectl: FAILED sha256sum: WARNING: 1 computed checksum did NOT match

sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl

Note: If you do not have root access on the target system, you can still install kubectl to the ~/.local/bin directory:

chmod +x kubectl mkdir -p ~/.local/bin mv ./kubectl ~/.local/bin/kubectl # and then append (or prepend) ~/.local/bin to $PATH

WARNING: This version information is deprecated and will be replaced with the output from kubectl version --short.

kubectl version --client --output=yaml

Install using native package management

sudo apt-get update sudo apt-get install -y ca-certificates curl

sudo apt-get install -y apt-transport-https

curl -fsSL https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-archive-keyring.gpg

echo "deb [signed-by=/etc/apt/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list

sudo apt-get update sudo apt-get install -y kubectl

Note: In releases older than Debian 12 and Ubuntu 22.04, /etc/apt/keyrings does not exist by default. You can create this directory if you need to, making it world-readable but writeable only by admins.

cat  [kubernetes] name=Kubernetes baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch enabled=1 gpgcheck=1 gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg EOF sudo yum install -y kubectl

Install using other package management

If you are on Ubuntu or another Linux distribution that supports the snap package manager, kubectl is available as a snap application.

snap install kubectl --classic kubectl version --client

If you are on Linux and using Homebrew package manager, kubectl is available for installation.

brew install kubectl kubectl version --client

Verify kubectl configuration

In order for kubectl to find and access a Kubernetes cluster, it needs a kubeconfig file, which is created automatically when you create a cluster using kube-up.sh or successfully deploy a Minikube cluster. By default, kubectl configuration is located at ~/.kube/config .

Check that kubectl is properly configured by getting the cluster state:

If you see a URL response, kubectl is correctly configured to access your cluster.

If you see a message similar to the following, kubectl is not configured correctly or is not able to connect to a Kubernetes cluster.

The connection to the server was refused - did you specify the right host or port?

For example, if you are intending to run a Kubernetes cluster on your laptop (locally), you will need a tool like Minikube to be installed first and then re-run the commands stated above.

If kubectl cluster-info returns the url response but you can’t access your cluster, to check whether it is configured properly, use:

Optional kubectl configurations and plugins

Enable shell autocompletion

kubectl provides autocompletion support for Bash, Zsh, Fish, and PowerShell, which can save you a lot of typing.

Below are the procedures to set up autocompletion for Bash, Fish, and Zsh.

Introduction

The kubectl completion script for Bash can be generated with the command kubectl completion bash . Sourcing the completion script in your shell enables kubectl autocompletion.

However, the completion script depends on bash-completion, which means that you have to install this software first (you can test if you have bash-completion already installed by running type _init_completion ).

Install bash-completion

bash-completion is provided by many package managers (see here). You can install it with apt-get install bash-completion or yum install bash-completion , etc.

The above commands create /usr/share/bash-completion/bash_completion , which is the main script of bash-completion. Depending on your package manager, you have to manually source this file in your ~/.bashrc file.

To find out, reload your shell and run type _init_completion . If the command succeeds, you’re already set, otherwise add the following to your ~/.bashrc file:

source /usr/share/bash-completion/bash_completion

Reload your shell and verify that bash-completion is correctly installed by typing type _init_completion .

Enable kubectl autocompletion

Bash

You now need to ensure that the kubectl completion script gets sourced in all your shell sessions. There are two ways in which you can do this:

 kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null sudo chmod a+r /etc/bash_completion.d/kubectl

If you have an alias for kubectl, you can extend shell completion to work with that alias:

echo 'alias k=kubectl' >>~/.bashrc echo 'complete -o default -F __start_kubectl k' >>~/.bashrc

Both approaches are equivalent. After reloading your shell, kubectl autocompletion should be working. To enable bash autocompletion in current session of shell, source the ~/.bashrc file:

The kubectl completion script for Fish can be generated with the command kubectl completion fish . Sourcing the completion script in your shell enables kubectl autocompletion.

To do so in all your shell sessions, add the following line to your ~/.config/fish/config.fish file:

kubectl completion fish | source

After reloading your shell, kubectl autocompletion should be working.

The kubectl completion script for Zsh can be generated with the command kubectl completion zsh . Sourcing the completion script in your shell enables kubectl autocompletion.

To do so in all your shell sessions, add the following to your ~/.zshrc file:

source (kubectl completion zsh)

If you have an alias for kubectl, kubectl autocompletion will automatically work with it.

After reloading your shell, kubectl autocompletion should be working.

If you get an error like 2: command not found: compdef , then add the following to the beginning of your ~/.zshrc file:

autoload -Uz compinit compinit

Install kubectl convert plugin

A plugin for Kubernetes command-line tool kubectl , which allows you to convert manifests between different API versions. This can be particularly helpful to migrate manifests to a non-deprecated api version with newer Kubernetes release. For more info, visit migrate to non deprecated apis

Download the latest release with the command:
- x86-64
- ARM64

  curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl-convert"

  curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl-convert"

  curl -LO "https://dl.k8s.io/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl-convert.sha256"

  curl -LO "https://dl.k8s.io/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl-convert.sha256"

Validate the kubectl-convert binary against the checksum file:

echo "$(cat kubectl-convert.sha256) kubectl-convert" | sha256sum --check

If the check fails, sha256 exits with nonzero status and prints output similar to:

kubectl-convert: FAILED sha256sum: WARNING: 1 computed checksum did NOT match

sudo install -o root -g root -m 0755 kubectl-convert /usr/local/bin/kubectl-convert

rm kubectl-convert kubectl-convert.sha256

What’s next

Install Minikube
See the getting started guides for more about creating clusters.
Learn how to launch and expose your application.
If you need access to a cluster you didn’t create, see the Sharing Cluster Access document.
Read the kubectl reference docs

Feedback

Thanks for the feedback. If you have a specific, answerable question about how to use Kubernetes, ask it on Stack Overflow. Open an issue in the GitHub repo if you want to report a problem or suggest an improvement.

Источник

Install Tools

The Kubernetes command-line tool, kubectl, allows you to run commands against Kubernetes clusters. You can use kubectl to deploy applications, inspect and manage cluster resources, and view logs. For more information including a complete list of kubectl operations, see the kubectl reference documentation.

kubectl is installable on a variety of Linux platforms, macOS and Windows. Find your preferred operating system below.

kind

kind lets you run Kubernetes on your local computer. This tool requires that you have either Docker or Podman installed.

The kind Quick Start page shows you what you need to do to get up and running with kind.

minikube

Like kind , minikube is a tool that lets you run Kubernetes locally. minikube runs an all-in-one or a multi-node local Kubernetes cluster on your personal computer (including Windows, macOS and Linux PCs) so that you can try out Kubernetes, or for daily development work.

You can follow the official Get Started! guide if your focus is on getting the tool installed.

Once you have minikube working, you can use it to run a sample application.

kubeadm

You can use the kubeadm tool to create and manage Kubernetes clusters. It performs the actions necessary to get a minimum viable, secure cluster up and running in a user friendly way.

Installing kubeadm shows you how to install kubeadm. Once installed, you can use it to create a cluster.

Feedback

Источник

Install kubectl on linux

Install and Set Up kubectl on Linux