Run Kubernetes

At kubernetes.run, our mission is to provide comprehensive information and resources for running Kubernetes in the cloud. We aim to empower developers and IT professionals with the knowledge and tools they need to successfully deploy, manage, and scale Kubernetes clusters in a variety of cloud environments. Our site offers expert insights, best practices, and practical tips for optimizing Kubernetes performance and maximizing the benefits of cloud-native computing. Whether you're a seasoned Kubernetes pro or just getting started, kubernetes.run is your go-to resource for all things Kubernetes in the cloud.

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Introduction

Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications. It is designed to simplify the management of containerized applications by providing a unified platform for deploying, scaling, and managing them. Kubernetes is becoming increasingly popular among developers and DevOps teams due to its ability to simplify the deployment and management of containerized applications.

This cheat sheet is designed to provide an overview of the key concepts, topics, and categories related to running Kubernetes in the cloud. It covers everything from the basics of Kubernetes to more advanced topics such as scaling, networking, and security.

Basics of Kubernetes

1. What is Kubernetes?

Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.

2. What are containers?

Containers are lightweight, portable, and self-contained environments that can run applications and their dependencies.

3. What is containerization?

Containerization is the process of packaging an application and its dependencies into a container.

4. What are the benefits of containerization?

Containerization provides several benefits, including portability, scalability, and isolation.

5. What is a Kubernetes cluster?

A Kubernetes cluster is a group of nodes that run containerized applications and are managed by Kubernetes.

6. What is a node?

A node is a physical or virtual machine that runs containerized applications.

7. What is a pod?

A pod is the smallest deployable unit in Kubernetes. It contains one or more containers and is scheduled onto a node.

8. What is a deployment?

A deployment is a Kubernetes object that manages the deployment of a set of pods.

9. What is a service?

A service is a Kubernetes object that provides a stable IP address and DNS name for a set of pods.

10. What is a namespace?

A namespace is a way to partition a Kubernetes cluster into multiple virtual clusters.

Advanced Topics

1. Scaling

Scaling is the process of increasing or decreasing the number of pods in a deployment to meet the demand for an application.

2. Horizontal Pod Autoscaler (HPA)

The Horizontal Pod Autoscaler (HPA) is a Kubernetes object that automatically scales the number of pods in a deployment based on CPU utilization.

3. Cluster Autoscaler

The Cluster Autoscaler is a Kubernetes add-on that automatically scales the number of nodes in a cluster based on the demand for resources.

4. Networking

Networking is the process of connecting pods and services within a Kubernetes cluster.

5. Service Mesh

A service mesh is a dedicated infrastructure layer for managing service-to-service communication within a Kubernetes cluster.

6. Ingress

Ingress is a Kubernetes object that provides external access to services within a Kubernetes cluster.

7. Load Balancing

Load balancing is the process of distributing traffic across multiple pods or nodes in a Kubernetes cluster.

8. Security

Security is a critical aspect of running Kubernetes in the cloud. Kubernetes provides several features to ensure the security of containerized applications.

9. Role-Based Access Control (RBAC)

Role-Based Access Control (RBAC) is a Kubernetes feature that provides fine-grained control over who can access and modify Kubernetes resources.

10. Network Policies

Network Policies are a Kubernetes feature that provides fine-grained control over network traffic within a Kubernetes cluster.

Conclusion

Kubernetes is a powerful platform for running containerized applications in the cloud. This cheat sheet provides an overview of the key concepts, topics, and categories related to running Kubernetes in the cloud. Whether you are new to Kubernetes or an experienced user, this cheat sheet will help you get started and provide a reference for the most important concepts and features of Kubernetes.

Common Terms, Definitions and Jargon

1. Kubernetes: An open-source container orchestration platform for automating deployment, scaling, and management of containerized applications.
2. Container: A lightweight, standalone executable package that includes everything needed to run an application, including code, libraries, and dependencies.
3. Pod: The smallest deployable unit in Kubernetes, consisting of one or more containers that share the same network namespace and storage volumes.
4. Node: A physical or virtual machine that runs Kubernetes and hosts one or more pods.
5. Cluster: A group of nodes that work together to run Kubernetes and host pods.
6. Deployment: A Kubernetes object that manages the rollout and scaling of a set of pods.
7. Service: A Kubernetes object that provides a stable IP address and DNS name for a set of pods, allowing them to be accessed by other pods or external clients.
8. Ingress: A Kubernetes object that manages external access to services within a cluster.
9. Namespace: A way to partition a Kubernetes cluster into multiple virtual clusters, each with its own set of resources and access controls.
10. ConfigMap: A Kubernetes object that stores configuration data as key-value pairs, which can be accessed by pods as environment variables or mounted as files.
11. Secret: A Kubernetes object that stores sensitive data, such as passwords or API keys, in an encrypted form.
12. PersistentVolume: A Kubernetes object that represents a piece of storage that can be mounted by a pod and persists even if the pod is deleted.
13. StatefulSet: A Kubernetes object that manages the deployment and scaling of stateful applications, such as databases, that require stable network identities and persistent storage.
14. DaemonSet: A Kubernetes object that ensures that a specific pod runs on every node in a cluster.
15. Job: A Kubernetes object that manages the execution of a batch job, such as a data processing task or a backup operation.
16. CronJob: A Kubernetes object that schedules the execution of a job at specified intervals, similar to a Unix cron job.
17. Helm: A package manager for Kubernetes that simplifies the installation and management of complex applications.
18. Operator: A Kubernetes extension that encapsulates domain-specific knowledge and automates the management of complex applications.
19. Istio: An open-source service mesh for Kubernetes that provides traffic management, security, and observability features.
20. Prometheus: An open-source monitoring system for Kubernetes that collects metrics from applications and infrastructure components.

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