<div style='text-align:center'><h1>My CGI work</h1></div> All work done with Superluminal Stardust in After Effects Stardust Stardust is a Modular 3D particle system for After Effects. It has an easy to use node based user interface and ships with a host of presets to create stunning effects. 1. Ziyankar <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FMyCGIworkStardust_(VFnRaPHONaWGedOCHesRgVTUsAz2)%2FLIBO-Screenshot(362).png?alt=media&token=c6416cac-2937-4a25-9ceb-fa371eca03dc'/></div> <a href='https://youtu.be/frRaTCRh7Ho'>Click here to watch</a> 2. Disorder <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FMyCGIworkStardust_(VFnRaPHONaWGedOCHesRgVTUsAz2)%2FLIBO-Screenshot(363).png?alt=media&token=4fd359d9-b37c-4581-bf42-dcc8faa26cd2'/></div> <a href='https://youtu.be/Fsh-WvRjo'>Click here to watch</a> 3. Cyberpunk City <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FMyCGIworkStardust_(VFnRaPHONaWGedOCHesRgVTUsAz2)%2FLIBO-Screenshot(364).png?alt=media&token=480883f3-2289-4f60-acfd-727cba302d9a'/></div> <a href='https://youtu.be/xoPi6nGbkY'>Click here to watch</a> 4. Plague <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FMyCGIworkStardust_(VFnRaPHONaWGedOCHesRgVTUsAz2)%2FLIBO-Screenshot(365).png?alt=media&token=caaac69e-f568-44b4-ac86-e01225d5477b'/></div> <a href='https://youtu.be/gFkElWyQC3U'>Click here to watch</a> 5. Odyssey <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FMyCGIworkStardust_(VFnRaPHONaWGedOCHesRgVTUsAz2)%2FLIBO-Screenshot(366).png?alt=media&token=a2bcaa07-4944-4e92-a75d-946d8cfe76a0'/></div> <a href='https://youtu.be/oBI3d8dSGmM'>Click here to watch</a> <a href='https://www.instagram.com/zahidbhat/'>Instagram</a> <a href='https://www.linkedin.com/in/zahid-bhat-53a57214b'>LinkedIn</a> <a href='https://www.behance.net/zahidbhat'>Behance</a>

My CGI work | Stardust

<div style='text-align:center'><h1>AWS CLI</h1></div> I'll be covering below shows topics in this article 1) Create a key pair  2) Create a security group  3) Launch an instance using the above created key pair and security group. 4) Create an EBS volume of 1 GB. 5) The final step is to attach the above created EBS volume to the instance you created in the previous steps. Here it begins, First of all, we have to create IAM user. AWS provides us IAM services where we can create user and give access to that user.  Step 1 : We have to set user details by giving user name(can add multiple users at once also) and then choose Programmatic Access type as AWS access type for AWS CLI. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603740767397.png?alt=media&token=168444b9-2c98-4a46-8938-5d0e53127508'/></div> Step 2: We have to set the permission which we want to give to user. I have given Power Access to the user. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603740838027.png?alt=media&token=781d8f8e-8198-4a8d-9542-c5896fba2783'/></div> Step 3: AWS will create the user and provide you Access key and Secret Access for that user. Now you can use them to login into our AWS CLI. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603740940813.png?alt=media&token=a7713fbc-9f7d-49b2-9357-b8c5962edf03'/></div> <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603740994666.png?alt=media&token=7b646481-26bb-4ccf-a0eb-2c41974a008b'/></div> So you can see user “awsuser1” is created. Now, we have to login to AWS CLI using Command Prompt. For that, we have to use the command “awsconfigure” and we have to provide an access key and secret access key to login to AWS CLI. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603741081738.png?alt=media&token=8972a086-c928-4d7b-b5c3-336b115bf9cf'/></div> We can use command “aws help” to get all the commands to enable services. For eg we want to use ec2 services . We can run the command “aws ec2 help” to get all the subcommands for ec2 services. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603741297774.png?alt=media&token=3f3b8829-85e1-45a6-980b-db3ba1bebf1b'/></div> 1.   Create a key pair We have to create key pair for that we can take help of AWS by writing command aws ec2 help This command will give us all the commands in ec2. Now , we can see the sub-command to create a key pair. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603741438934.png?alt=media&token=cf8dd0b3-50b9-408e-a143-d513bf51ba8b'/></div> We can create new key pair by running command : aws ec2 create-key-pair—key-name Mykey <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603741498266.png?alt=media&token=c9fdc977-f78d-46d8-9db7-cf58fcc72aa6'/></div> 2) Create a security group To create a security group we can run the command as follows: aws ec2 create security-group –group-name SecurityGroup –description “Security Group” <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603741640163.png?alt=media&token=eb13174a-a226-402d-9970-cdcd5bcfb3e2'/></div> 3) Launch an instance using the above created key pair and security group. Command: aws ec2 run-instances --image-id ami-0e306788ff2473ccb --instance-type t2.micro --subnet-id subnet-0b606963 --count 1-- security-group-ids sg-09007a4edb9fed422 --keky0name MyKey <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603742026352.png?alt=media&token=d9d4476c-7770-44d2-bcc6-3d9b7c9923a1'/></div> Now you can see that a new instance is launched in CLI. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603742055267.png?alt=media&token=de56b895-d3f0-4952-9829-de8b92e1aa5e'/></div> You can see it in GUI also. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603742102470.png?alt=media&token=e84936e6-5f79-4b2c-b734-9ac8bf410dd8'/></div> Here above you can see the instance running. 4) Create an EBS volume of 1 GB. Command: aws ec2 create-volume --availability-zone ap-south-1a --size 1 <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603742231737.png?alt=media&token=f4729897-f8ae-46c6-95cd-0398574a6425'/></div> You can see the EBS volume size created. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603742442335.png?alt=media&token=e6f1f6b8-955c-423d-a5d8-ef381392b749'/></div> We can see the EBS volume size on GUI also. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603742490844.png?alt=media&token=95db31a2-8d10-4eb5-be56-fb645122fa0c'/></div> 5) The final step is to attach the above created EBS volume to the instance you created in the previous steps. aws ec2 attach-volume --instance-id i-09c153c2d1f021ff6 --device /dev/sdf --volume-id vol-0f7c3ce9613bac95b <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603742840816.png?alt=media&token=799979a7-cd22-4c84-98a7-2d3600341ee6'/></div> Now You can see that EBS is in use State in AWS GUI. <div align='center'><img src='https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FAWS%20CLI_(e5qm5CIndZNd4fA15RkQT6UiXur2__22-03-2021%2000%3A14%3A24)%2FLIBO-1603742796315.png?alt=media&token=cc86c18e-59d8-4a15-bb58-add82772de6a'/></div> Thanks for reading. Follow me for more.

AWS CLI

Mathematics gate

Just to show the wide use of 3D printing, these products were first modelled using a&nbsp;&nbsp;CAD software, 3D printed using ultimaker 2, and further decorated using paints and thread.

3D printing with touch a artistry.

Ansible is an open-source automation platform. It is very, very simple to set up and yet powerful. Ansible can help you with configuration management, application deployment, task automation. It can also do IT orchestration, where you have to run tasks in sequence and create a chain of events that must happen on several different servers or devices. An example is if you have a group of web servers behind a load balancer. Ansible can upgrade the web servers one at a time and while upgrading it can remove the current web server from the load balancer and disable it in your Nagios monitoring system. So in short you can handle complex tasks with a tool that is easy to use. <h1>Ansible’s Features and Capabilities</h1> 1. Configuration Management Ansible is designed to be very simple, reliable, and consistent for configuration management. If you’re already in IT, you can get up and running with it very quickly. Ansible configurations are simple data descriptions of infrastructure and are both readable by humans and parsable by machines. All you need to start managing systems is a password or an SSH (Secure Socket Shell, a network protocol) key. An example of how easy Ansible makes configuration management: If you want to install an updated version of a specific type of software on all the machines in your enterprise, all you have to do is write out all the IP addresses of the nodes (also called remote hosts) and write an Ansible playbook to install it on all the nodes, then run the playbook from your control machine. 2. Application Deployment Ansible lets you quickly and easily deploy multitier apps. You won’t need to write custom code to automate your systems; you list the tasks required to be done by writing a playbook, and Ansible will figure out how to get your systems to the state you want them to be in. In other words, you won’t have to configure the applications on every machine manually. When you run a playbook from your control machine, Ansible uses SSH to communicate with the remote hosts and run all the commands (tasks). 3. Orchestration As the name suggests, orchestration involves bringing different elements into a beautifully run whole operation—similar to the way a musical conductor brings the notes produced by all the different instruments into a cohesive artistic work. For example, with application deployment, you need to manage not just the front-end and backend services but the databases, networks, storage, and so on. You also need to make sure that all the tasks are handled in the proper order. Ansible uses automated workflows, provisioning, and more to make orchestrating tasks easy. And once you’ve defined your infrastructure using the Ansible playbooks, you can use that same orchestration wherever you need to, thanks to the portability of Ansible playbooks. 4. Security and Compliance As with application deployment, sitewide security policies (such as firewall rules or locking down users) can be implemented along with other automated processes. If you configure the security details on the control machine and run the associated playbook, all the remote hosts will automatically be updated with those details. That means you won’t need to monitor each machine for security compliance continually manually. And for extra security, an admin’s user ID and password aren’t retrievable in plain text on Ansible. 5. Cloud Provisioning The first step in automating your applications’ life cycle is automating the provisioning of your infrastructure. With Ansible, you can provision cloud platforms, virtualized hosts, network devices, and bare-metal servers. Next in our learning of what is Ansible, let us learn the Ansible architecture. Ansible Playbooks The real strength of Ansible lies in its Playbooks. A playbook is like a recipe or an instructions manual that tells Ansible what to do when it connects to each machine. Playbooks are written in YAML, which simplistically could be viewed as XML but human-readable. When I started using Ansible I’d never looked at YAML, but within hours I was able to write powerful playbooks. Also, there are a lot of examples online to help you while you learn. You could have a Playbook that configures your servers according to a baseline you have defined, so they all are using the correct sshd config and central authentication. Then you use roles for specific server groups. Say you have groups for web servers, database servers, and monitoring servers. Then you decide to add a web server. When you fire off your Playbook, Ansible will install and configure the webserver. It will make sure your database server allows connections from the new server, and then add the new server to your network monitoring solution so that you are informed if the server suffers a failure in the future. Ansible Terms: 👉Controller Machine: The machine where Ansible is installed, responsible for running the provisioning on the servers you are managing. 👉Inventory: An initialization file that contains information about the servers you are managing. 👉Playbook: The entry point for Ansible provisioning, where the automation is defined through tasks using YAML format. 👉Task: A block that defines a single procedure to be executed, e.g. Install a package. 👉Module: A module typically abstracts a system task, like dealing with packages or creating and changing files. Ansible has a multitude of built-in modules, but you can also create custom ones. 👉Role: A pre-defined way for organizing playbooks and other files in order to facilitate sharing and reusing portions of provisioning. 👉Play: A provisioning executed from start to finish is called a play. In simple words, the execution of a playbook is called a play. 👉Facts: Global variables containing information about the system, like network interfaces or operating system. 👉Handlers: Used to trigger service status changes, like restarting or stopping a service. Ansible is a helpful tool that allows you to create groups of machines, describe how these machines should be configured or what actions should be taken on them. Ansible issues all commands from a central location to perform these tasks. No other client software is installed on the node machines. It uses SSH to connect to the nodes. Ansible only needs to be installed on the control machine (the machine from which you will be running commands) which can even be your laptop. It is a simple solution to a complicated problem.  I am not boasting off when I say that Ansible has filled up all the holes in Configuration Management and IT Orchestration world. You will know it too when you take a look at the benefits of Ansible mentioned below: Advantages Of Using Ansible Simple: Ansible uses a simple syntax written in YAML called playbooks. YAML is a human-readable data serialization language. It is extraordinarily simple. So, no special coding skills are required and even people in your IT organization, who do not know what is Ansible can likely read a playbook and understand what is happening. Ansible always executes tasks in order. It is simple to install too Agentless: Finally, Ansible is completely agentless. There are no agents/software or additional firewall ports that you need to install on the client systems or hosts that you want to automate. You do not have to separately set up a management infrastructure which includes managing your entire systems, network, and storage. Ansible further reduces the effort required for your team to start automating right away. Powerful & Flexible: Ansible has powerful features that can enable you to model even the most complex IT workflows. In this aspect, Ansible’s batteries included approach (This philosophy means that something is self-sufficient, comes out-of-the-box ready to use, with everything that is needed) can manage the infrastructure, networks, operating systems, and services that you are already using, as Ansible provides you with hundreds of modules to manage them. Together Ansible’s capabilities allow you to orchestrate the entire application environment regardless of where it is deployed. Efficient: No extra software on your servers means more resources for your applications. Also, since Ansible modules work via JSON, Ansible is extensible with modules written in a programming language you already know. Ansible introduces modules as basic building blocks for your software. So, you can even customize it as per your needs. For e.g. If you have an existing message sending module that sends messages in plain-text, and you want to send images too, you can add image sending features on top of it.  Ansible and Microsoft Azure Automate Microsoft Azure simply Chances are teams in your organization are already successfully deploying workloads in the public cloud. As more new applications are built natively for the cloud, IT leaders are looking for ways to deliver a consistent customer experience and management strategy across cloud and on-premise applications. The good news - if your IT teams are already using Ansible to describe on-premise infrastructure and applications, then you can easily use these descriptions to automate the same workloads in Microsoft Azure. Azure supports customers’ push to a hybrid cloud in the areas of infrastructure, user identity, and management. Using Ansible to automate these Azure services gives organizations the flexibility to run workloads where they best make sense. Automate once, Deploy anywhere Ansible’s library of Azure modules makes it easy to provision instances, networks, and complete Azure infrastructure whenever you need, and in any region you require. For example, the same simple Playbook language you use for application deployment and on-prem automation also provisions your Azure infrastructure, applying the correct configuration. Once you use Ansible to define your application locally, you can repeatedly deploy and redeploy the application. Re-deploying it to a different infrastructure is as straightforward as defining your Azure environment and then applying your application’s Playbook. No more surprises. Because of its power and flexibility, Ansible ensures your Azure deployments work seamlessly in a hybrid cloud configuration as easily as you build a single system. Windows, Linux, Services, Networks AND MORE Azure hosts a lot more than just Windows, and thankfully Ansible automates it all. Ansible has been designed for cloud deployments from the beginning, and Ansible easily allows you to provision a variety of Azure cloud services. Whether you’re building a simple 3-tier application, or a complicated set of virtual private clouds, services, and applications, your Azure environments can be described in Ansible Playbooks, and then scaled out across regions. Ansible has modules for many different Azure capabilities, including: 🔵 Virtual&nbsp;&nbsp;Machines 🔵 Virtual Networks 🔵 Storage and Storage Accounts 🔵 Resource Groups 🔵 Security Groups 🔵 Resource Manager Templated Deployments Ansible also has hundreds and hundreds of additional modules that help you manage every aspect of your Linux, Windows, UNIX, network infrastructure, and applications - regardless of where they're deployed. Automating in Azure at Scale As your Azure footprint and supporting teams grow, you will realize the need for controls to restrict users’ ability to modify certain environments. The answer is simple: Red Hat Ansible Tower gives you an enterprise framework for controlling, securing, and managing Ansible automation with a UI and RESTful API. Ansible Tower helps teams who use Ansible with an extensive set of role-based access controls that ensures users will only have access to the Azure resources (networks, systems, security groups, etc.) that are required for their job. Plus, Ansible Tower encrypts credentials such as Azure and SSH keys so that you can delegate simple automation jobs to junior employees without giving out the (literal) keys to the kingdom.

Ansible and its industry use cases

<div style='text-align:center'>Android Development with Jetpack (making android apps)</div> Android Jetpack is a set of components, tools and architectural guidance that make it quick and easy to build great Android apps. Components are individually adoptable but built to work together while taking advantage of Kotlin language features that make you more productive. Android Jetpack comes with so many features/libraries that we will cover one at a time in this series, and the easiest way to implement it in our Android apps. Why use Android Jetpack 🧐 Below, we will describe three main reasons to use Android Jetpack   Best practices Built around modern design practices, Android Jetpack components result in fewer crashes and memory leaks, with backward-compatibility baked in. Eliminate boilerplate code Android Jetpack manages tedious activities like background tasks, navigation, and lifecycle management, so you can focus on what makes your app great.   Reduce fragmentation Reduce complexity with libraries that work consistently across Android versions and devices. Let’s take the overview of the most popular libraries   Jetpack Compose Jetpack Compose simplifies and accelerates UI development on Android. Quickly bring our app to life with less code, powerful tools, and intuitive Kotlin APIs. Jetpack Compose is still in the development phase, which means things will change a lot.   Paging The Paging library helps us load and display pages of data from a larger dataset from local storage or over network. The components of the Paging library are designed to fit into the recommended Android app architecture, integrate cleanly with other Jetpack components, and provides first-class Kotlin support.   CameraX CameraX is a Jetpack support library, built to help us make camera app development easier. It provides a consistent and easy-to-use API surface that works across most Android devices, with backward-compatibility to Android 5.0 (API level 21).   Room The Room persistence library provides an abstraction layer over SQLite to allow for more robust database access while harnessing the full power of SQLite.   WorkManager The WorkManager API makes it easy to schedule deferrable, asynchronous tasks that must be run reliably. These APIs let you create a task and hand it off to WorkManager to run when the work constraints are met.   Navigation Component Navigation is a framework for navigating between ‘destinations’ within an Android application that provides a consistent API whether destinations are implemented as Fragments, Activities, or other components. It makes it easier to build and structure your in-app UI, handle deep links, and navigate between screens.   Hilt Hilt is a dependency injection library for Android that reduces the boilerplate of doing manual dependency injection in your project. Hilt provides a standard way to use DI in your application by providing containers for every Android class in your project and managing their lifecycles automatically   ViewModel The ViewModel class is designed to store and manage UI-related data in a lifecycle conscious way. The ViewModel class allows data to survive configuration changes such as screen rotations.   LiveData LiveData is an observable data holder class. Unlike a regular observable, LiveData is lifecycle-aware, meaning it respects the lifecycle of other app components, such as activities, fragments, or services. This awareness ensures LiveData only updates app component observers that are in an active lifecycle state. Those are some libraries and features that are inside Android Jetpack.   Thanks to you for reading this post! Please do 👏🏿 if you liked it and want more posts about Android development and Kotlin follow me.

Developing Apps with Android Jetpack 

B.E 7th Semester Computer Science&nbsp;&nbsp;previous year papers, Jammu University. <div style='text-align:center'><h1>Follow for more</h1></div>

7th Sem Computer previous year papers, Jammu University

B.E 1st Semester previous year papers, Jammu University. Follow for more

1st Sem B.E previous year papers, Jammu University

<div style='text-align:center'><h1>Kubernetes</h1></div> Kubernetes is an open-source container orchestration engine for automating deployment, scaling, and management of containerized applications. The open-source project is hosted by the Cloud Native Computing Foundation. The name Kubernetes originates from Greek, meaning helmsman or pilot. Google open-sourced the Kubernetes project in 2014. Kubernetes combines over 15 years of Google's experience running production workloads at scale with best-of-breed ideas and practices from the community. <div align='center'><img src="https://firebasestorage.googleapis.com/v0/b/libo-android-app.appspot.com/o/notes%2FKubernetes%20and%20it's%20use%20cases_(e5qm5CIndZNd4fA15RkQT6UiXur2__21-03-2021%2022%3A33%3A52)%2FLIBO-1608973378020.png?alt=media&token=c9f1275a-b7a5-4c03-8d44-6f197e144103"/></div> Terminology Kubernetes has its own vocabulary which, once you get used to it, gives you some sense of how things are organized. These terms include: ✔Pods: Pods are a group of one or more containers, their shared storage, and options about how to run them. Each pod gets its own IP address. ✔Labels: Labels are key/value pairs that Kubernetes attaches to any objects, such as pods, Replication Controllers, Endpoints, and so on. ✔Annotations: Annotations are key/value pairs used to store arbitrary non-queryable metadata. ✔Services: Services are an abstraction, defining a logical set of Pods and a policy by which to access them over the network. ✔Replication Controller: Replication controllers ensure that a specific number of pod replicas are running at any one time. ✔Secrets: Secrets hold sensitive information such as passwords, TLS certificates, OAuth tokens, and ssh keys. ✔ConfigMap: ConfigMaps are mechanisms used to inject containers with configuration data while keeping containers agnostic of Kubernetes itself. Why you need Kubernetes and what it can do Containers are a good way to bundle and run your applications. In a production environment, you need to manage the containers that run the applications and ensure that there is no downtime. For example, if a container goes down, another container needs to start. Wouldn't it be easier if this behavior was handled by a system? That's how Kubernetes comes to the rescue! Kubernetes provides you with a framework to run distributed systems resiliently. It takes care of scaling and failover for your application, provides deployment patterns, and more. For example, Kubernetes can easily manage a canary deployment for your system. Kubernetes provides you with: 👉Service discovery and load balancing Kubernetes can expose a container using the DNS name or using their own IP address. If traffic to a container is high, Kubernetes is able to load balance and distribute the network traffic so that the deployment is stable. 👉Storage orchestration Kubernetes allows you to automatically mount a storage system of your choice, such as local storages, public cloud providers, and more. 👉Automated rollouts and rollbacks You can describe the desired state for your deployed containers using Kubernetes, and it can change the actual state to the desired state at a controlled rate. For example, you can automate Kubernetes to create new containers for your deployment, remove existing containers and adopt all their resources to the new container. 👉Automatic bin packing You provide Kubernetes with a cluster of nodes that it can use to run containerized tasks. You tell Kubernetes how much CPU and memory (RAM) each container needs. Kubernetes can fit containers onto your nodes to make the best use of your resources. 👉Self-healing Kubernetes restarts containers that fail, replaces containers, kills containers that don't respond to your user-defined health check, and doesn't advertise them to clients until they are ready to serve. 👉Secret and configuration management Kubernetes lets you store and manage sensitive information, such as passwords, OAuth tokens, and SSH keys. You can deploy and update secrets and application configuration without rebuilding your container images, and without exposing secrets in your stack configuration. Benefits of Kubernetes Kubernetes enables users to schedule, run and monitor containers, typically in clustered configurations, and automate related operational tasks. These include: · Continuously check container health, restart failed containers and remove unresponsive ones. · Perform load balancing to distribute traffic across multiple container instances. · Handle varied storage types for container data, from local storage to cloud resources. · Set and modify preferred states for container deployment. Users can create new container instances, migrate existing ones to them and remove the old ones. · Add a level of intelligence to container deployments, such as resource optimization --identify which nodes are available and which resources are required for containers, and automatically fit containers onto those nodes. · Manage passwords, tokens, SSH keys and other sensitive information. CASE STUDY: Adidas Staying True to Its Culture, Adidas Got 40% of Its Most Impactful Systems Running on Kubernetes in a Year Challenge In recent years, the adidas team was happy with its software choices from a technology perspective—but accessing all of the tools was a problem. For instance, "just to get a developer VM, you had to send a request form, give the purpose, give the title of the project, who's responsible, give the internal cost center a call so that they can do recharges," says Daniel Eichten, Senior Director of Platform Engineering. "The best case is you got your machine in half an hour. Worst case is half a week or sometimes even a week." Solution To improve the process, "we started from the developer point of view," and looked for ways to shorten the time it took to get a project up and running and into the adidas infrastructure, says Senior Director of Platform Engineering Fernando Cornago. They found the solution with containerization, agile development, continuous delivery, and a cloud native platform that includes Kubernetes and Prometheus. Impact Just six months after the project began, 100% of the Adidas e-commerce site was running on Kubernetes. Load time for the e-commerce site was reduced by half. Releases went from every 4-6 weeks to 3-4 times a day. With 4,000 pods, 200 nodes, and 80,000 builds per month, Adidas is now running 40% of its most critical, impactful systems on its cloud-native platform. In recent years, the Adidas team was happy with its software choices from a technology perspective—but accessing all of the tools was a problem. For engineers at Adidas, says Daniel Eichten, Senior Director of Platform Engineering, "it felt like being an artist with your hands tied behind your back, and you're supposed to paint something." For instance, "just to get a developer VM, you had to send a request form, give the purpose, give the title of the project, who's responsible, give the internal cost center a call so that they can do recharges," says Eichten. "Eventually, after a ton of approvals, then the provisioning of the machine happened within minutes, and then the best case is you got your machine in half an hour. Worst case is half a week or sometimes even a week." To improve the process, "we started from the developer point of view," and looked for ways to shorten the time it took to get a project up and running and into the Adidas infrastructure, says Senior Director of Platform Engineering Fernando Cornago. "There is no competitive edge over our competitors like Puma or Nike in running and operating a Kubernetes cluster. Our competitive edge is that we teach our internal engineers how to build cool e-comm stores that are fast, that are resilient, that are running perfectly."— DANIEL EICHTEN, SENIOR DIRECTOR OF PLATFORM ENGINEERING AT ADIDAS Thank you for reading the article

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