Introduction to k8s

 Hello friends,

Good Day! Hope you guys are doing well, I am writing here some basic terminology n introduction to kube8.. please do read n let me know if you have any questions!

Introduction to Kubernetes

Kubernetes, often abbreviated as K8s, is an open-source container orchestration platform designed to automate the deployment, scaling, and management of containerized applications. It was originally developed by Google and is now maintained by the Cloud Native Computing Foundation (CNCF). Kubernetes has become the standard for managing modern, cloud-native applications due to its scalability, flexibility, and ecosystem support.

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Core Concepts of Kubernetes

1. Containers and Pods

Containers: Containers are lightweight, portable, and self-contained units that include the application code and dependencies required to run an application. They provide consistency across environments, from development to production.

Pods: Pods are the smallest deployable units in Kubernetes. A pod can consist of one or more containers that share the same network namespace and storage. Pods are typically used to group containers that need to work closely together.

2. Nodes and Clusters

Nodes: A node is a worker machine in Kubernetes, which can be physical or virtual. Each node contains the necessary services to run containers, such as the container runtime, kubelet, and kube-proxy.

Cluster: A Kubernetes cluster is a collection of nodes managed by a control plane. The cluster ensures high availability and provides load balancing for applications.

3. Kubernetes Control Plane

The control plane is responsible for managing the state of the cluster and making decisions about scheduling, scaling, and maintaining the desired state. Key components include:

API Server: The entry point for all administrative tasks and interactions with the cluster.

Controller Manager: Ensures the cluster's desired state is maintained by managing controllers like node, replication, and endpoint controllers.

Scheduler: Determines on which node a pod will run based on resource availability and constraints.

etcd: A distributed key-value store used for storing all cluster data.

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Key Features of Kubernetes

1. Automated Scaling

Kubernetes can automatically scale applications up or down based on CPU, memory usage, or custom metrics. This ensures optimal resource utilization.

2. Self-Healing

Kubernetes continuously monitors the health of pods and nodes. If a container fails, Kubernetes restarts it automatically.

3. Load Balancing and Service Discovery

Kubernetes provides built-in load balancing and service discovery mechanisms to ensure seamless traffic routing between services.

4. Rollouts and Rollbacks

Kubernetes supports automated rollouts of application updates and allows rollbacks to a previous version if issues arise.

5. Multi-Cloud and Hybrid Support

Kubernetes can run on any infrastructure, including on-premises data centers, public clouds, and hybrid environments.

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Benefits of Using Kubernetes

1. Portability: Kubernetes works across various environments without changes.

2. Scalability: Automatically adjusts resources based on demand.

3. Fault Tolerance: Ensures high availability of applications with self-healing features.

4. Resource Optimization: Maximizes hardware efficiency by packing containers effectively.

5. Ecosystem: A large community and extensive ecosystem support a variety of tools and plugins.

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Conclusion

Kubernetes is a powerful platform for managing containerized applications in production. By automating deployment, scaling, and maintenance, Kubernetes empowers developers to focus on building robust and scalable applications while reducing operational overheard 

Thanks for reading my blog😊

Yours VK

Git cheat sheet

 Here’s a ready-to-use Git Command Cheat Sheet for your blog:

Git Command Cheat Sheet : 

Git is an essential tool for developers to manage code, track changes, and collaborate on projects. Here's a comprehensive cheat sheet to help you master Git commands!

Basic Git Commands

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git init: Initialize a new Git repository in your project folder.

git clone <repository_url>: Clone an existing repository to your local machine.

git status: Check the status of your working directory and staging area.

git add <file>: Stage specific changes for commit.

git add .: Stage all changes in the current directory.

git commit -m "message": Save staged changes with a descriptive commit message.

Branching and Merging

git branch: View all branches in your repository.

git branch <branch_name>: Create a new branch.

git checkout <branch_name>: Switch to an existing branch.

git checkout -b <branch_name>: Create and switch to a new branch in one step.

git merge <branch_name>: Merge the specified branch into the current branch.

git branch -d <branch_name>: Delete a branch after merging.

Working with Remote Repositories

git remote add <name> <url>: Add a remote repository.

git fetch <remote>: Retrieve updates from the remote repository without merging.

git pull: Fetch updates from the remote repository and merge them into your current branch.

git push <remote> <branch>: Push your commits to the specified branch on a remote repository.

Viewing and Tracking Changes

git log: View the commit history.

git log --oneline: View a condensed version of the commit history.

git diff: See changes in unstaged files.

git diff --staged: View changes in files staged for commit.

Undoing Changes

git restore <file>: Discard changes in the working directory.

git restore --staged <file>: Unstage a file without discarding changes.

git reset <commit>: Reset the current branch to a specific commit (keeps working directory changes).

git reset --hard <commit>: Reset the branch and discard all changes.

Stashing Changes

git stash: Save your changes temporarily without committing.

git stash list: View all stashes.

git stash apply: Apply stashed changes back to your working directory.

git stash drop: Delete a stash after applying it.

Tags

git tag <tag_name>: Create a lightweight tag for a specific commit.

git tag: List all tags in the repository.

git push <remote> <tag_name>: Push a tag to the remote repository.

Miscellaneous Commands

git config --global user.name "Your Name": Set your global Git username.

git config --global user.email "your.email@example.com": Set your global Git email address.

git clean -f: Forcefully remove untracked files from the working directory.

git blame <file>: Show changes and authors for each line in a file.

Save this cheat sheet for quick reference during your projects. Git is a powerful tool, and mastering it will enhance your productivity as a developer!

Thanks for watching my blog😊

Yours VK