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Assignment# 1 – What is Docker and Container? Define in 15 points with example image Container: Container in short a runtime of it’s own Runs in separate namespace isolated from host Has its own Root FS & USER space, PID tree, MNT and Network etc. This is not a bootable image like VM and BOOT FS is held with host itself. Its own quota of Resources like RAM, CPU etc would be Allocated through cgroups Docker: Container manager SW that
Read moreAssignment# 1 – What is Docker and Container? Define in 15 points with example image Docker: Docker is container management platform There are two major Docker components – Docker Engine and Docker Image Docker Engine is a collection of Docket client, service Docket container is collection of ContainerD service and interface to Kernel services Docker Image is a collection of file systems and versions of file systems Docket images contains ROOT file system + User file system and Application file
Read moreWhat is Docker? Docker is container management tool. Docker has two release. Enterprise Community. Father of Docker is solomna hykes. It’s written in Golang. Latest version of Docker is 20.X 2. Container Container is runtime application environment where we can run the application. lightweight and has no OS , Kernel. Which has all resources to run which comes from root machine, independent run time environment and isolated. 3. Difference between docker pause and unpause? Docker pause Docker unpause Suspends all
Read moreAssignment# 1 – What is Docker and Container? Define in 15 points with example image Assignment# 2 – What is the differnece between docker pause and unpuase? Assignment# 3 – What is the differnece between docker stop and kill?
Read moreHello folks, welcome to the exotic world of programming. Let’s take a move to the scene of the fork and its contribution in that how can we do fork and contribution in GitHub. If you would understand that each and every aspect of account creation, making a repository, and creating the branch in GitHub then this is the place where you can great ideology on the fork. Adding more features Suppose you have opened your profile and there is a
Read moreHello listeners, today, we are going to talk about how to make a branch in GitHub? Before, starting this article. Must you will read this article till the end. Let’s start to create a branch in GitHub. After knowing how to create a repository in GitHub? What is the need for a branch in GitHub? Suppose, you have your own repository from the name of GitHub training then you want to add any features in the code. You aren’t sure
Read moreHello everyone, welcome to the wonderful world of computer programing. Today, we are going to talk about the repository. Before starting this, I want to do clear one thing that must, you will read this article till the end. Let’s have look, how can we make GitHub repository? As you know about GitHub account creation. Create a repository in GitHub Simply, you can understand the repository like repository is your folder in that you upload your projects. So, how can
Read moreA Secret is an object that contains a small amount of sensitive data such as a password, a token, or a key. Such information might otherwise be put in a Pod specification or in a container image. Using a Secret means that you don’t need to include confidential data in your application code. A kubernetes.io/service-account-token type of Secret is used to store a token that identifies a service account. When creating a Pod, Kubernetes automatically creates a service account Secret and automatically modifies your Pod to
Read moreHello friends, welcome to the world of programming. Let’s start this. Like, you will have seen the title of the article. Today, I’m talking about GitHub, mainly talk will happen about GitHub. After that, you are taking to see some more platforms, those are like GitHub, that use of Git. Unlimited private repositories Therefore, go to GitHub and looking for the pricing, for pricing, we go to the plans & see the price. That GitHub was before 20I9, those were
Read moreA ReplicaSet is a process that runs multiple instances of a Pod and keeps the specified number of Podsconstant. Its purpose is to maintain the specified number of Pod instances running in a cluster at given timeand to prevent users from losing access to their application when pPod fails or is inaccessible. create -f rs.yamlkubectl get rs replicasetkubectl get Pods Q2. What happen when you pause a deployment using rollout? K8 enables you to pause a deployment. You can then
Read moreReplica sets is to ensure defined no. of identical pods are always available, even if some of the pods gets corrupted and becomes unavailable, it is restarted by replica sets again. Example – In case of node failure where 1 node fails, replica-set ensure, pods of that node is started in another node. In case of deployment rollout, replica sets ensure new pods gets created with new version.
Read morekubectl attach kubectl exec We can attach to the main process run by the container, which is not always bash. Which is the PID1. It allows us to execute any process within the container Attach to the one running (no choice) Run any command you want to execute.
Read moreWe use PKI certificates for authentication over TLS in Kubernetes. If we install Kubernetes with “kubeadm” command, the certificates that your cluster requires are automatically generated. You can also generate our own certificates. How Certificates are used in Kubernetes Cluster: Client certificates for the kubelet to authenticate to the API server Server certificate for the API server endpoint Client certificates for administrators of the cluster to authenticate to the API server Client certificates for the API server to talk to
Read moreKubectl Exec: In addition to being able to attach to existing processes inside a container, the “exec” command allows you to spawn new processes inside existing containers Kubectl attach: In addition to interactive execution of commands, you can now also attach to any running process. Like kubectl logs, you’ll get stderr and stdout data, but with attach, you’ll also be able to send stdin from your terminal to the program
Read moreUsers Enters Private Key Password. Client retrieves private-key and uses it to create evidence(“digital signature”) Client sends certificate and evidence across network Server uses certificate and evidence to authenticate the users identity Server authorizes access for authenticated identity
Read moreHow certifcations based auth works??In Certification based authentication, digital certificates are used to validate a user, machine or application, before granting access. These are easy to create, delete or rollback. Certificate based authentication is fast and easy to use. Write a diff between Create vs Apply and Put Vs Post and define IDEOMPOTENCY?Put:- in case of put create new object. it is ideompotent. it will replace a object.Post:- insert or update , even if object is already present. it is
Read moreHello folks, welcome to the world of computer programming. So, if you’re a software engineer and either student or fresher. And you do anything work-related to computer, doing any coding. So, you will have listened must about the GIT. What is GIT? Today, we talk about that stuff. Without doing any further delay, let’s start this from my article. Who is the developer of GIT? Let’s see the first thing, the developer of that GIT whose name was “Linus Torvalds”.
Read morewhat is Kubernetes: Container Orchestrator EngineWorkload PlacementInfrastructure AbstractionDesired StateKubernetes is originally designed by google and later acquired by CNCF-2014 with open source.Kubernetes called as k8sKubernetes is an orchestrator tool to manage container workloads usually hosted on multiple hosts. it can manage 1000s of container workloads Why KubernetesControlling resource consumption by application or teamEvenly spreading application load across a host infrastructureAutomatically load balancing requests across the different instances of an applicationMoving an application instance from one host to another if there
Read moreWhat is Kubernetes ?-Kubernetes is a container orchestration tool which was intially developed by Google and then dontated to CNCF.-Kubernetes is also an orchestration tool for microservice apps-With kubernetes we can over come scalability challenges that comes with containers.-With kubernetes we can acheive Auto scaling, load balacning, self-healing.-Few benefits of kubernetes on a high level note are.. It enhances productivity, centralized control over cluster, security, scalability, portability.– Why Kubernetes ?-Kubernetes can be used to overcome the challenges that comes with
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