Terraform is a tool to write a code & it allows to programmatically provision the physical resources to an application requires to run. It is used to automate the provisioning of your cloud resources. Terraform is an open-source, cloud-agnostic provisioning tool developed by HashiCorp and written in GO language.

 Example Terraform program

resources.tf

resource “github_repository” “Sample” {
name = “terraform1”
description = “My first terraform project”

visibility = “public”
}

terraform.tf

provider github

{

token=”ghp_CpzDx9BrikaSXBsOVJ4t90NoK0FZQH3AkrzP”

owner=”Organization”

Terraform commands and its use

1. terraform init : used to initialize the directory which consists of configuration files.
2. terraform plan : uses to check the configuration to determine the desired state of all the resources it declares.
3. terraform apply : used to planned changes to resource using the same type of infrastructure providers API.
4. terraform destroy : used to destroy all the resources being managed by current directory.
5. terraform show : used to provide an output of plan file in understandable manner.

Kubernetes is an open-source container for automating software deployment, scaling, and management. Kubernetes originally designed by Google, Kubernetes is a portable, extensible, open-source platform for managing containerized workloads and services. Kubernetes is a system that manages containers where a container could be explained as a lightweight virtual machine. To build an application you need to build a bunch of containers and then use Kubernetes to manage those containers. Kubernetes provides an easy way to scale your application, compared to virtual machines. It keeps code operational and speeds up the delivery process. Kubernetes API allows automating a lot of resource management and provisioning tasks. Kubernetes, also known as K8s, is an open-source system for automating deployment, scaling, and management of containerized applications.

5 reasons of using kubernetes

Kubernets has elaborate security precautions

portability and flexibility

multi cloud capability

Increased developer productivity

Optimizing the It costs

Kubernetes Components

API server: All the services like managing resources and functionalities handled in api server.

ETCD: Etcd is a distributed key-value storeof Kubernetes. It stores and replicates the Kubernetes cluster state.To run etcd, you first need to have a Kubernetes cluster and the command-line tool configured to communicate.And used for storing all data of kubernetes cluster.

Schedular:The scheduler’s responsibility is to assign pods to nodes within your cluster. The scheduler will use information such as compute requests and limits defined within your workload.For assigning container to wporker also this schedular component helpful

Controller mgmr:

The Kubernetes controller manager is a collection of controllers bundled within a single binary and run in a single process.

I. Node controller: Responsible for identifying changes in nodes within the cluster

II. Replication controller: Responsible for maintaining replications of objects in the cluster

III. Endpoint controller: Responsible for provisioning of endpoints

Kube proxy: Used for connecting networking services.

Docker is a container that communicate and configure files with each other through some defined channels, it is used in automation projects. Docker reduces time in deployment and make easy for the developer to build, run and test the process.

What is Container?

Container is a set of packages used to run the application quickly and reliable. Containers make sure that it works uniformly even there might be some variations in instances between developing. Containers are standard, secure and light weight

What are top 5 advantage of Docker?

Speed 

Reduces cost and time

Secure

Deployment velocity

Reliable

Commands Used in 24-05-2022 Session

• docker start : starts already stopped containers.
• docker stop  : stops running containers
• docker info  : shows system-wide information
• docker ps  : lists various properties of containers
• docker restart  : stops and starts a container
• docker pull  : pulls an image or a repository from your local registry
• docker history : Displays the history of an image
• docker rm : removes containers
• docker rmi  : removes images
• docker exec : Runs a command in a container that is active or running.

DEVOPS = AGILE + OPERATIONS

AGILE Includes Business and Development
therefore, DEVOPS = DEVELOPMENT & TESTERS + IT OPERATIONS

Development includes plan, code, build, test

Operations includes release, deploy, operate, monitor

DevOps is a combination of tools and it’s effort that make automation and increases the organizations ability and delivers the software with more quality and error free.

ADVANTAGES OF DEVOPS

Speed of Delivering the Project

Correctness

Reliable

High velocity

Continuous Monitoring and Security

Costs Reduction

Collaboration, Coordination and Communication

Feedback and Customer Satisfaction

New Features and Less Errors

Improvement of Project and Fast Deployment

TOP TOOLS IN DEVOPS

1. JUnit
2. Jenkins
3. Chef
4. Puppet
5. Git
6. Eclipse
7. Maven
8. Gradle
9. Nagios
10. Ansible

IMPLEMENTATION OF DEVOPS

• CREATING A TEMPLATE
• PROVISION SERVER
• INSTALL SOFTWARE REQUIRED
• CONFIGURE THE SOFTWARE
• DEPLOYMENT

DevOps is a software methodology that integrate the work and uses in developing and improving the operations by continuous collaboration, communication between the teams and feedback.

The implementation of DevOps done as following methodology :

Organizing a DevOps person -> Building the Strategy -> Containerizing -> integration -> automation -> Performance monitoring -> feedback