101-cluster-setup-and-configuration

src/roadmaps/kubernetes/content/100-kubernetes-introduction/100-what-is-kubernetes.md

@@ -1 +1,13 @@
-# What is kubernetes
+# What is Kubernetes
+
+Kubernetes can be described as a platform for managing and running containers. Containers are a type of virtualization technology that allow you to package applications and their dependencies into a single, isolated unit, known as a container image.
+
+Kubernetes provides a way to deploy, manage, and scale these containerized applications in a clustered environment. This makes it easier to deploy, scale, and manage applications, especially microservices-based applications, in a consistent and reliable manner.
+
+Kubernetes provides features such as automatic load balancing, self-healing, and rolling updates, which makes it a popular choice for running production-grade applications. With Kubernetes, you can deploy, manage, and scale your applications in a controlled, predictable, and efficient way, regardless of whether you're running them on-premise, in the cloud, or in a hybrid environment.
+
+Learn more from the following links:
+
+- [Kuberenetes Documentation](https://kubernetes.io/docs/home/)
+- [Overview of Kubernetes](https://kubernetes.io/docs/concepts/overview/)
+- [Tutorial - What is Kubernetes](https://www.youtube.com/watch?v=VnvRFRk_51k)

src/roadmaps/kubernetes/content/100-kubernetes-introduction/101-concepts-and-terminologies.md

@@ -1 +1,20 @@
-# Concepts and terminologies
+# Concepts and Terminologies
+
+Following are the main concepts and terminologies in Kubernetes:
+
+1. Cluster: A group of machines, either physical or virtual, that run Kubernetes and work together to host your applications.
+2. Node: A single machine in a cluster that runs containers.
+3. Pod: The smallest and simplest unit in the Kubernetes object model, representing a single instance of a running process in your cluster.
+4. Deployment: A higher-level object that manages replicas of your application and updates to them. A deployment ensures that a specified number of pods are running at any given time.
+5. Service: An abstraction that defines a logical set of pods and a policy by which to access them. Services enable communication between pods and expose your application to the network.
+6. Volume: A way to persist data generated by and used by containers. Volumes allow data to survive beyond the lifetime of a single pod.
+7. Label: A key-value pair that can be attached to objects in Kubernetes, used to organize and select subsets of objects.
+8. Namespace: A virtual cluster for organizing resources within a physical cluster. Used for isolating resources and sharing cluster access.
+9. Kubelet: An agent that runs on each node in the cluster and communicates with the control plane to ensure that containers are running as expected.
+10. kubectl: A command-line tool for interacting with a Kubernetes cluster.
+
+Learn more from the following links:
+
+- [Concepts - Kubernetes](https://kubernetes.io/docs/concepts/)
+- [Overview of Kubernetes](https://kubernetes.io/docs/concepts/overview/)
+- [Kubernetes Basics](https://www.youtube.com/watch?v=B_X4l4HSgtc)

src/roadmaps/kubernetes/content/100-kubernetes-introduction/102-kubernetes-vs-other-container-orchestration-tools.md

@@ -1 +1,20 @@
-# Kubernetes vs other container orchestration tools
+# Kubernetes vs other Container Orchestration Tools
+
+Kubernetes is one of the most popular and widely used container orchestration tools, but there are several other tools available for managing containers, such as:
+
+- Docker Swarm
+- Apache Mesos
+- Amazon ECS (Elastic Container Service)
+- Hashicorp Nomad
+
+When comparing these tools to Kubernetes, there are several key differences to consider:
+
+1. Complexity: Kubernetes is more complex than other tools, but provides more features and greater flexibility for deploying and managing containers.
+2. Community: Kubernetes has a large and active community, providing a wealth of resources and support.
+3. Portability: Kubernetes has better portability and can run on multiple platforms, including on-premise, in the cloud, or in a hybrid environment.
+4. Integrations: Kubernetes has a large number of integrations with other tools and services, making it easier to manage and operate containers.
+
+Learn more from the following resources:
+
+- [Production-Grade Container Orchestration](https://kubernetes.io/)
+- [Docker vs Kubernetes vs Docker Swarm](https://www.youtube.com/watch?v=9_s3h_GVzZc)

src/roadmaps/kubernetes/content/100-kubernetes-introduction/index.md

@@ -1 +1,9 @@
-# Introduction
+# Introduction
+
+Kubernetes is an open-source platform for automating deployment, scaling, and management of containerized applications. It helps in organizing and scheduling containers on a cluster of machines and ensures that they run as intended. It provides features like self-healing, rollouts and rollbacks, service discovery, and secret management. Kubernetes helps in building and deploying highly available, scalable applications that run in containers. It has become a popular platform for deploying microservices-based applications and is widely adopted in the industry.
+
+Learn more from the following resources:
+
+- [Kubernetes Documentation](https://kubernetes.io/docs/home/)
+- [Kubernetes Tutorial for Beginners](https://www.youtube.com/watch?v=X48VuDVv0do)
+- [Introduction To Kubernetes](https://www.youtube.com/watch?v=ISUmszlMQPU)

src/roadmaps/kubernetes/content/101-cluster-setup-and-configuration/100-setting-up-a-cluster.md

@@ -1 +1,19 @@
-# Setting up a cluster
+# Setting up a Cluster
+
+Setting up a cluster in Kubernetes can seem like a daunting task, but it can be broken down into a few simple steps. Here's a basic overview of how to get started:
+
+- Install and configure the necessary software: You'll need to install the Kubernetes command line tool, kubectl, and a software package manager such as Docker, Minikube, or MicroK8s to help manage your cluster.
+
+- Choose a cloud provider or physical hardware: You can either set up a cluster on a cloud provider such as AWS, Google Cloud, or Microsoft Azure, or on physical hardware such as a computer or a cluster of computers.
+
+- Initialize the cluster: Once you have the necessary software installed, you can use kubectl to initialize your cluster. This step will create the necessary components, such as the control plane and worker nodes, and configure them to work together.
+
+- Deploy applications: Once your cluster is up and running, you can use kubectl to deploy your applications. You can either create manifests for your applications or use a pre-existing container image from a registry such as Docker Hub.
+
+- Monitor and manage the cluster: It's important to monitor and manage your cluster to ensure that it's running smoothly. You can use tools like kubectl and Kubernetes dashboards to monitor resource usage, check the status of your applications, and troubleshoot any issues that may arise.
+
+Learn more from the following links:
+
+- [Getting started with Kubernetes](https://kubernetes.io/docs/setup/)
+- [Build a Kubernetes Home Lab from Scratch](https://www.youtube.com/watch?v=_WW16Sp8-Jw)
+- [Install Kubernetes Cluster](https://www.youtube.com/watch?v=Ro2qeYeisZQ)

src/roadmaps/kubernetes/content/101-cluster-setup-and-configuration/101-configuring-nodes.md

@@ -1 +1,14 @@
-# Configuring nodes
+# Configuring Nodes
+
+Configuring nodes in Kubernetes involves setting up individual machines that will host the containers managed by a cluster. Following is the procedure to do so:
+
+- Install a container runtime: In order to run containers, a node must have a container runtime installed, such as Docker or CRI-O.
+- Install kubeadm, kubelet and kubectl: Kubeadm is a tool that helps you bootstrap a Kubernetes cluster. Kubelet is an agent that runs on each node and makes sure that containers are running as expected. Kubectl is a command-line tool for controlling the cluster.
+- Join the node to the cluster: The node must be registered with the cluster so that it can receive instructions from the control plane components. You can do this by using the `kubeadm join` command, which you run on the node and pass it the join token and cluster discovery information that you got when you created the cluster.
+- Assign labels and taints to nodes: Labels and taints are used to control which pods can run on a node. Labels are used to categorize nodes and taints are used to mark nodes as unschedulable for certain pods. You can assign labels and taints to a node using the `kubectl label` and `kubectl taint` commands.
+- Monitor node health: It's important to monitor the health of your nodes to make sure they are running as expected and that the containers they host are healthy. You can monitor node health by using tools like `kubectl get nodes`, `kubectl describe node`, and Kubernetes Dashboard.
+
+Learn more from the following links:
+
+- [Nodes in Kubernetes](https://kubernetes.io/docs/concepts/architecture/nodes/)
+- [Setup Kubernetes Master and Worker Node](https://www.youtube.com/watch?v=ftrAFHL6w2c)

src/roadmaps/kubernetes/content/101-cluster-setup-and-configuration/102-cluster-networking.md

@@ -1 +1,16 @@
-# Cluster networking
+# Cluster Networking
+
+Cluster networking in Kubernetes refers to the communication between different components of a Kubernetes cluster, such as pods, services, and nodes. In order to understand how cluster networking works in Kubernetes, it's helpful to understand some basic concepts.
+
+A pod is the smallest unit of deployment in Kubernetes, and it contains one or more containers. Pods have a unique IP address and can communicate with other pods through the network.
+
+A service is a logical abstraction over a set of pods, and it provides a stable IP address and DNS name for those pods. Services allow communication between pods and external clients.
+
+Nodes are the worker machines in a Kubernetes cluster, and they run the pods. Nodes communicate with each other and with the control plane components, such as the API server, to manage the cluster.
+
+By default, Kubernetes uses the Container Network Interface (CNI) plugin to implement cluster networking. CNI plugins are responsible for allocating network addresses, creating network interfaces for pods, and setting up network routes.
+
+Learn more from the following links:
+
+- [Cluster Networking](https://kubernetes.io/docs/concepts/cluster-administration/networking/)
+- [Kubernetes Networking](https://www.youtube.com/watch?v=OaXWwBLqugk)

src/roadmaps/kubernetes/content/101-cluster-setup-and-configuration/103-cluster-federation.md

@@ -1 +1,16 @@
-# Cluster federation
+# Cluster Federation
+
+Cluster Federation in Kubernetes is a feature that allows multiple individual Kubernetes clusters to be joined into a single, federated cluster. This enables administrators to manage multiple clusters as a single entity, providing a unified view and management of resources across multiple clusters.
+
+Here's a simple explanation of the concept:
+
+- Create multiple individual Kubernetes clusters, each with its own resources.
+- Set up a federated control plane that acts as a central management system for the individual clusters.
+- Use the federated control plane to manage and orchestrate resources across all the individual clusters.
+
+Applications running on the individual clusters can be made available to other clusters through the federation, enabling cross-cluster communication and sharing of resources.
+
+Learn more from the following links:
+
+- [Kubernetes Federation Evolution](https://kubernetes.io/blog/2018/12/12/kubernetes-federation-evolution/)
+- [Kubernetes Cluster Federation](https://www.youtube.com/watch?v=86jZdmAjWns)

src/roadmaps/kubernetes/content/101-cluster-setup-and-configuration/104-multi-cluster-management.md

@@ -1 +1,12 @@
-# Multi cluster management
+# Multi Cluster Management
+
+Multi-cluster management in Kubernetes refers to the process of managing multiple Kubernetes clusters as a single entity. This allows for the centralized management of resources across multiple clusters, making it easier to manage and deploy applications at scale.
+
+For example, a multi-cluster management system might allow you to manage multiple Kubernetes clusters in different regions, and deploy an application to multiple clusters with a single command. Additionally, it can provide a unified view of resources across multiple clusters, making it easier to understand the state of your infrastructure.
+
+Multi-cluster management in Kubernetes can be achieved through various tools and solutions, such as the Kubernetes federation API, and various multi-cluster management platforms like OpenShift and Anthos.
+
+Learn more from the following links:
+
+- [Configure Access to Multiple Clusters](https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/)
+- [Tutorial - Kubernetes Multi-Cluster Management](https://www.youtube.com/watch?v=CsTLmRj5Xo8)

src/roadmaps/kubernetes/content/101-cluster-setup-and-configuration/index.md

@@ -1 +1,26 @@
-# Cluster setup and configuration
+# Cluster Setup and Configuration
+
+Setting up a k8s cluster can be a complex task, but there are various tools and resources available to help beginners get started.
+
+Here's a basic step-by-step guide to setting up a k8s cluster:
+
+1. Requirements:
+    - A set of machines (physical or virtual) to act as nodes in your cluster.
+    - A machine to act as the master node, which will manage the other nodes.
+    - A way to network the nodes together so they can communicate with each other.
+2. Install k8s:
+    - Choose the appropriate installation method for your setup. You can install k8s using a package  manager, or you can use a tool such as kubeadm to automate the process.
+3. Initialize the Cluster:
+    - Use the kubeadm tool to initialize your cluster and create the necessary configuration files.
+4. Join Nodes to the Cluster:
+    - Use the kubeadm tool to join additional nodes to your cluster.
+5. Verify the Cluster:
+    - Use the kubectl command-line tool to verify that your nodes are healthy and that the cluster is functioning as expected.
+6. Deploy Applications:
+    - Use kubectl to deploy and manage applications on your k8s cluster.
+
+Learn more from the following links:
+
+- [Getting started with Kubernetes](https://kubernetes.io/docs/setup/)
+- [Configure Access to Multiple Clusters](https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/)
+- [Cluster Architecture in Kubernetes](https://kubernetes.io/docs/concepts/architecture/)