Kubectl is a command line tool used to interact with Kubernetes clusters. It allows users to deploy, inspect, and manage applications running on Kubernetes.

What are some common kubectl commands?

Some common kubectl commands include: - kubectl get: displays information about resources in a cluster - kubectl create: creates a new resource - kubectl delete: deletes a resource - kubectl apply: applies changes to a resource - kubectl describe: displays detailed information about a resource - kubectl logs: displays logs for a container in a pod

What are some tips for using kubectl?

Some tips for using kubectl include: - Use kubectl config to manage multiple clusters - Use kubectl explain to get detailed information about resources - Use kubectl edit to edit resources directly - Use kubectl apply instead of kubectl create to update existing resources - Use kubectl logs -f to stream logs in real-time

What is kubectl autocomplete?

Kubectl autocomplete is a feature that allows users to use tab completion to quickly and easily enter kubectl commands. It can be enabled by running the kubectl completion command.

What are some kubectl plugins?

Some kubectl plugins include: - kubectl-who-can: displays who has access to a resource - kubectl-tree: displays resources in a tree-like structure - kubectl-ctx: manages kubectl contexts - kubectl-ns: manages Kubernetes namespaces - kubectl-ssh: SSH into a container in a pod

Kubectl Tips

At kubectl.tips, our mission is to provide a comprehensive resource for developers and system administrators who use Kubernetes command line tools like kubectl. We aim to deliver high-quality, up-to-date information and tutorials that help our readers improve their skills and efficiency when working with Kubernetes. Our goal is to become the go-to destination for anyone seeking to learn more about kubectl and other Kubernetes command line tools, and to foster a community of like-minded professionals who share our passion for this powerful technology.

Video Introduction Course Tutorial

/r/kubernetes Yearly

📄 k8s IRL

📄 Probably old ....

📄 K8s deployment hierarchy 😅

📄 Learning Kubernetes be like ..

📄 I did the CKA thing

📄 I really enjoyed the etcd reference in the new Lord of the Rings series

📄 I built a kubernetes operator to manage my resume

📄 Starting cloudnative journey be like ..

📄 Kubernetes is not for the faint-hearted 😅

📄 Undoubtedly the biggest mystery in Kubernetes 😅

📄 kubectl get airpods

📄 Explaining cluster security be like ..

📄 Argo became a graduated CNCF project

📄 CEO of Portainer.io here, can i ask a couple of questions?

📄 Does anyone else feel like this?

📄 Don't be like Bill!

📄 Kubecolor

📄 My life trying to get kn to work on microk8s on Multipass

📄 Starting to get into Kubernetes Security...

📄 A wise man said, let’s do Kubernetes. A wiser man said, let’s learn to do 12-factor Apps first

📄 AI is the future

📄 How Kubernetes RBAC works

📄 [URGENT] Netflix Engineer Needs Help Scaling Kubernetes Deployment or I'm Toast!

📄 Overcoming the real paradox of managing Kubernetes 😅

📄 I quit my job to build a Kubernetes GUI, now looking for feedback!

📄 That wonderful feeling of being on call and at 3am...

📄 The name of my AirPods

📄 Keep away from interns' reach

📄 For the love of god, stop using CPU limits on Kubernetes (updated version)

📄 When you learn the Sidecar Container KEP got dropped from the Kubernets release. Again.

📄 Why I Will Never Use Alpine Linux Ever Again

📄 Mercedes-Benz Automates 900 Kubernetes Clusters

📄 LFX CKA exam - back to the 90s - Gbit Fibre, 5yr K8s, 25yr unix admin - undone by LFX exam running in a vm on a RPi using an SDCard for swap. Video taken when abundantly clear completely impossible to navigate/pass the exam, chat support zero help. Before after speed tests 400mbit/30msec

📄 Some humor at new years 😀

📄 Passing your CKA exam before having any work experience with Kubernetes

📄 Karpenter consolidation and EKS node viewer

📄 Every time I have to put a YAML in a secret

📄 PlayStation wants to get gameservers running on Kubernetes

📄 I've been collecting a list of k8s/container tools and sorting them by the number of stars in Github, so far the most complete k8s/container list I know of with almost 250 entries - hoping this is useful for someone else besides me - looking for feedback, ideas for improvement and contributors

📄 The future of Kubernetes? 5 trends from Kubecon!

📄 Mirantis is up to more shenanigans with Lens, removes logs and shell. OpenLens affected as well.

📄 Minecraft as a Kubernetes admin tool

📄 Passed my CKA today using the KodeKloud Course - Thoughts and Tips.

📄 Can we take a moment to appreciate k3s and how easy it makes standing up a k8s cluster?

📄 How many Kubernetes clusters does your company operate?

📄 Kubeshark PCAP Export

📄 Kubernetes 1.25 will be out next week! - Learn what's new and what's deprecated - Pod Security Control - Checkpoints - User Namespaces - NodeExpansion secrets… And more!

Introduction

Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications. It provides a powerful set of tools for managing containerized workloads, including kubectl, the command-line interface for Kubernetes. Kubectl is a powerful tool that allows you to interact with Kubernetes clusters, manage resources, and deploy applications. In this cheat sheet, we will cover everything you need to know to get started with kubectl.

Installation

To use kubectl, you need to have a Kubernetes cluster up and running. You can install Kubernetes on your local machine using tools like Minikube or Docker Desktop. Once you have a Kubernetes cluster running, you can install kubectl using the following commands:

# For macOS
brew install kubectl

# For Linux
curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/

Basic Commands

Once you have kubectl installed, you can start using it to manage your Kubernetes cluster. Here are some of the basic commands you should know:

# Get information about the Kubernetes cluster
kubectl cluster-info

# Get a list of nodes in the cluster
kubectl get nodes

# Get a list of pods in the default namespace
kubectl get pods

# Get a list of services in the default namespace
kubectl get services

# Get detailed information about a pod
kubectl describe pod <pod-name>

# Get logs from a pod
kubectl logs <pod-name>

# Create a new deployment
kubectl create deployment <deployment-name> --image=<image-name>

# Scale a deployment
kubectl scale deployment <deployment-name> --replicas=<number-of-replicas>

# Delete a deployment
kubectl delete deployment <deployment-name>

Namespaces

Namespaces are a way to organize resources in a Kubernetes cluster. They provide a way to partition resources and limit access to those resources. By default, Kubernetes creates a namespace called "default" for all resources that are not explicitly assigned to a namespace. Here are some commands related to namespaces:

# Get a list of namespaces
kubectl get namespaces

# Create a new namespace
kubectl create namespace <namespace-name>

# Get a list of pods in a specific namespace
kubectl get pods --namespace=<namespace-name>

# Set the default namespace for kubectl commands
kubectl config set-context --current --namespace=<namespace-name>

Labels and Selectors

Labels are key-value pairs that can be attached to Kubernetes resources. They are used to identify and group resources. Selectors are used to filter resources based on their labels. Here are some commands related to labels and selectors:

# Add a label to a pod
kubectl label pod <pod-name> <label-key>=<label-value>

# Get a list of pods with a specific label
kubectl get pods -l <label-key>=<label-value>

# Get a list of pods with multiple labels
kubectl get pods -l <label-key1>=<label-value1>,<label-key2>=<label-value2>

# Delete a label from a pod
kubectl label pod <pod-name> <label-key>-

# Get a list of pods that do not have a specific label
kubectl get pods -l <label-key>!=<label-value>

Deployments

Deployments are a way to manage the deployment of containerized applications in Kubernetes. They provide a way to declaratively manage the desired state of your application. Here are some commands related to deployments:

# Create a new deployment
kubectl create deployment <deployment-name> --image=<image-name>

# Get a list of deployments
kubectl get deployments

# Get detailed information about a deployment
kubectl describe deployment <deployment-name>

# Scale a deployment
kubectl scale deployment <deployment-name> --replicas=<number-of-replicas>

# Update a deployment
kubectl set image deployment/<deployment-name> <container-name>=<new-image>

# Rollback a deployment
kubectl rollout undo deployment/<deployment-name>

Services

Services are a way to expose your application to the network. They provide a stable IP address and DNS name for your application, and can load-balance traffic across multiple pods. Here are some commands related to services:

# Create a new service
kubectl create service <service-type> <service-name> --tcp=<port>:<target-port>

# Get a list of services
kubectl get services

# Get detailed information about a service
kubectl describe service <service-name>

# Expose a deployment as a service
kubectl expose deployment <deployment-name> --type=<service-type> --port=<port>

# Delete a service
kubectl delete service <service-name>

ConfigMaps and Secrets

ConfigMaps and Secrets are ways to manage configuration data in Kubernetes. ConfigMaps are used to store configuration data as key-value pairs, while Secrets are used to store sensitive data like passwords and API keys. Here are some commands related to ConfigMaps and Secrets:

# Create a new ConfigMap
kubectl create configmap <configmap-name> --from-literal=<key1>=<value1> --from-literal=<key2>=<value2>

# Get a list of ConfigMaps
kubectl get configmaps

# Get detailed information about a ConfigMap
kubectl describe configmap <configmap-name>

# Create a new Secret
kubectl create secret generic <secret-name> --from-literal=<key1>=<value1> --from-literal=<key2>=<value2>

# Get a list of Secrets
kubectl get secrets

# Get detailed information about a Secret
kubectl describe secret <secret-name>

Conclusion

Kubectl is a powerful tool that allows you to manage your Kubernetes cluster from the command line. In this cheat sheet, we covered the basic commands for managing resources in Kubernetes, as well as some advanced topics like namespaces, labels and selectors, deployments, services, and ConfigMaps and Secrets. With this knowledge, you should be able to get started with Kubernetes and start deploying your containerized applications with confidence.

Common Terms, Definitions and Jargon

1. Kubernetes: An open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.
2. kubectl: A command-line interface tool used to interact with Kubernetes clusters.
3. API server: The component of the Kubernetes control plane that exposes the Kubernetes API.
4. Control plane: The set of Kubernetes components that manage the state of the cluster.
5. Node: A worker machine in Kubernetes that runs containerized applications.
6. Pod: The smallest deployable unit in Kubernetes, consisting of one or more containers.
7. ReplicaSet: A Kubernetes object that ensures a specified number of replicas of a pod are running at all times.
8. Deployment: A Kubernetes object that manages the rollout and scaling of a set of replicas.
9. Service: A Kubernetes object that provides a stable IP address and DNS name for a set of pods.
10. Namespace: A way to divide cluster resources between multiple users or teams.
11. ConfigMap: A Kubernetes object that stores configuration data as key-value pairs.
12. Secret: A Kubernetes object that stores sensitive data, such as passwords or API keys.
13. Volume: A way to store data in Kubernetes that persists beyond the lifetime of a pod.
14. PersistentVolume: A Kubernetes object that represents a piece of storage in the cluster.
15. PersistentVolumeClaim: A Kubernetes object that requests a specific amount of storage from a PersistentVolume.
16. StatefulSet: A Kubernetes object that manages the deployment and scaling of stateful applications.
17. DaemonSet: A Kubernetes object that ensures a pod is running on every node in the cluster.
18. Job: A Kubernetes object that runs a task to completion.
19. CronJob: A Kubernetes object that runs a task on a schedule.
20. HorizontalPodAutoscaler: A Kubernetes object that automatically scales the number of replicas of a pod based on resource usage.

Editor Recommended Sites

AI and Tech News
Best Online AI Courses
Classic Writing Analysis
Tears of the Kingdom Roleplay
Cloud Architect Certification - AWS Cloud Architect & GCP Cloud Architect: Prepare for the AWS, Azure, GCI Architect Cert & Courses for Cloud Architects
Typescript Book: The best book on learning typescript programming language and react
Secrets Management: Secrets management for the cloud. Terraform and kubernetes cloud key secrets management best practice
Learn Redshift: Learn the redshift datawarehouse by AWS, course by an Ex-Google engineer
Prompt Composing: AutoGPT style composition of LLMs for attention focus on different parts of the problem, auto suggest and continue