Kubernetes is the leading container orchestration platform. This Skill Tree provides a comprehensive learning path to master Kubernetes. Ideal for DevOps beginners, it offers a clear roadmap to understand container orchestration, scaling, and deployment strategies. Through hands - on, non - video courses and practical exercises in a cloud - native playground, you'll gain real - world experience in large - scale management of containerized applications.
TABLE OF CONTENTS
BASICS
Kubernetes Basics cover the fundamental aspects and initial setup of a Kubernetes cluster. This includes basic operational tasks and initial configuration steps needed for a functional Kubernetes environment.
The 'dashboard' skill involves using the Kubernetes Dashboard, a web-based user interface for managing Kubernetes clusters. It provides a visual overview of cluster resources and simplifies administrative tasks.
Initialization in Kubernetes involves setting up the initial state of a cluster. This includes tasks like bootstrapping the cluster, setting up essential services, and configuring network policies.
BASIC COMMANDS
Basic Commands in Kubernetes are essential for day-to-day operations and management of Kubernetes objects. They enable the creation, modification, and deletion of resources in a Kubernetes cluster.
The 'get' command is used to retrieve information about one or more resources in a Kubernetes cluster. It provides a quick way to see the status of resources like pods, services, deployments, etc.
The 'create' command allows users to create new resources in a Kubernetes cluster. It is commonly used to create objects like pods, deployments, services, using either command-line parameters or YAML configuration files.
The 'delete' command is used to remove resources from a Kubernetes cluster. It can be used to delete various types of resources like pods, services, or entire deployments, either individually or in bulk.
The 'edit' command lets users modify the configuration of existing resources in a Kubernetes cluster. It opens the configuration in an editor, allowing for live changes to the resource's properties.
The 'set' command is used to change specific aspects of existing resources in a Kubernetes environment. This could include changing environment variables, image versions, or resource limits for a deployment.
The 'expose' command in Kubernetes is used to expose a resource like a pod, deployment, or service to the internet or other pods within the cluster. It is a key command for making applications accessible.
The 'run' command in Kubernetes creates and runs a particular image in a pod. It is a quick way to start a single-instance stateless application or to run a one-off task in a pod.
The 'annotate' command is used to add or update annotations on Kubernetes resources. Annotations are key/value pairs that can be used to store additional metadata about the resource.
The 'cordon' command marks a node in a Kubernetes cluster as unschedulable. This prevents new pods from being scheduled on the node, while existing pods remain running.
The 'uncordon' command reverses the action of 'cordon', allowing a previously cordoned node to schedule new pods. It's used in node maintenance or upgrade scenarios.
The 'taint' command in Kubernetes is used to mark a node with a key-value pair that repels certain pods. It allows for control over which pods can or cannot be scheduled on a particular node.
ADVANCED COMMANDS
Advanced Commands in Kubernetes are used for sophisticated operations and configurations. They provide deeper control and customization of Kubernetes resources and behavior.
The 'apply' command is used to apply changes to resources in a Kubernetes cluster. It is a powerful tool for managing applications and infrastructure, allowing users to declare desired states for resources.
ADVANCED DEPLOYMENT
Advanced Deployment in Kubernetes encompasses commands used for complex deployment scenarios. These commands are crucial for scaling, updating, and managing applications and services within the cluster.
The 'rollout' command manages the deployment process in Kubernetes. It is used for tasks like updating applications, rolling back changes, and viewing the status of ongoing rollouts.
The 'scale' command adjusts the number of replicas in a deployment, replicaset, or stateful set. It is crucial for managing the scaling of applications to meet demand or resource constraints.
CORE CONCEPTS
Core Concepts in Kubernetes involve understanding the fundamental building blocks and architecture of Kubernetes. This knowledge is essential for effective deployment and management of the cluster.
The 'architecture' skill involves understanding the components and operational principles of a Kubernetes cluster. This includes knowledge of nodes, pods, services, and how they interact within the Kubernetes ecosystem.
CLUSTER INFORMATION
Cluster Information commands in Kubernetes provide critical data regarding the cluster's configuration, status, and connectivity. These commands are fundamental for understanding the state and health of the cluster.
The 'cluster-info' command provides key information about the cluster's status and the location of its primary services. This includes details about the master and Kubernetes dashboard among others.
CLUSTER MANAGEMENT COMMANDS
Cluster Management Commands in Kubernetes focus on the overall management and health of the Kubernetes cluster. These commands are used for monitoring and managing the cluster's state and resources.
The 'top' command displays resource usage statistics for nodes or pods in a Kubernetes cluster. It is an important tool for monitoring the performance and resource consumption of the cluster.
TROUBLESHOOTING AND DEBUGGING COMMANDS
Troubleshooting and Debugging Commands of commands in Kubernetes aids in diagnosing and resolving issues within the cluster. They are crucial for maintaining the health and performance of applications and the cluster itself.
The 'describe' command provides detailed information about Kubernetes resources. It's used to inspect and diagnose the status, events, and configuration details of any Kubernetes object.
The 'exec' command is used to execute commands within a container in a Kubernetes pod. It is an essential tool for debugging running containers by providing access to the container's environment.
The 'logs' command retrieves logs from containers in a Kubernetes pod. It is an essential debugging tool, allowing developers to view stdout and stderr logs to diagnose application issues.
The 'port-forward' command in Kubernetes is used to forward one or more local ports to a pod. This is particularly useful for debugging, testing, or direct access to applications running in pods.
The 'proxy' command creates a proxy server between your machine and the Kubernetes API server. It is used for securing and controlling access to the Kubernetes cluster API from a development environment.
CONFIGURATION AND VERSIONING
Configuration and Versioning in Kubernetes deal with the management of resource configurations and the Kubernetes environment. This includes handling resource labels, configurations, and Kubernetes version management.
The 'label' command is used to add, update, or delete labels on Kubernetes resources. Labels are key/value pairs attached to resources, used for organizing and selecting subsets of objects.
The 'config' command manages the kubeconfig files that store configuration and authentication information of the Kubernetes clusters. It's vital for managing access to multiple clusters.
The 'version' command is used to display the current version of Kubernetes that the kubectl client and the server are running. It helps in ensuring compatibility and troubleshooting version-related issues.