devops : automate your infrastructure with puppet

View DevOps course details at www.edureka.co/devops

Devops: Automate Your Infrastructure with Puppet

www.edureka.co/devops

Objectives

At the end of this module, you will be able to understand -

DevOps and its importance

DevOps Life cycle

Puppet introduction

Puppet basics

Demo using Puppet to install Apache web server.


What is DevOps

DevOps is a mindset that enables communication, collaboration and integration betweenSoftware developers, Quality Engineers and Information Technology ( Operations ) professionals to enable rapid evolution of products or services.


Development & Operation (DevOps)

“Dev” is used as a shorthand for developers inparticular, but in practice it is even wider and itmeans that “all the people involved indeveloping the product,” that include theproduct, QA and other disciplines.

“Ops” is a blanket term for systemsengineers/Administrators, Release engineers,DBAs, Network engineers, Securityprofessionals and various other sub-disciplinesand job titles”


Development & Operation (DevOps)

DEVOPS

Development

(Software Engineering)

Quality Assurances

Technical Operations


Roles of Developers :

Develop/modify applications

Try new technologies

Roles of Operations :

Build, Deploy and release

Performance and availability

Create or enhance services

Development & Operations

Slide 7Slide 7 www.edureka.co/devops

Why DevOps?

Customers RequirementsDev and

Testing TeamOperations

Gap Between Developers and

Operations


Why DevOps?

Development

Operations

Change

» Developers introduce changes» They try to implement every new

techniques introduced

» Change is the enemy for Operations» Changes can lead to instability


Dev Tools Ops Tools

» Difficult to integrate tools

» Less interest in learning each others tools

» Different implementation of similar tools

Why DevOps?


During Deployment

Sends out artifacts based on requirements

Manually hacks the scripts received and changes the config files to reflect changes in production which could potentially lead

to an issue.

Development Operations

Why DevOps?


All the artifacts are fine, the error is because of some other issue.

QA was given wrong setup.

Developer gave faulty artifacts

Development

Operations

Day 1: Loss of Work

Why DevOps?


After deployment, QA sees some anomalies and raises defects

Day 3: After Deployment

Operations

Developer realizes that correct DB was not deployed

Development

Why DevOps?


DevOps as a SolutionInstead of seeing these two groups as silos who pass things along but don’t really work together, DevOps recognizes the interdependencies of software development and IT operations and helps an organization to produce software and IT services more rapidly, with frequent iterations.

DevOps bridges the gap between agile software development and operations


DevOps Skills

DevOps Tools – Ability to administer and customize them

Scripting/Automation Skills – Demonstrates the traditional scripting skills to IT operations

Coding Skill – Should possess developer skills in using automation

Process re-engineering Skills – Reflects the holistic view of IT and development as a single system, instead

of two different functions

Skills Products

Linux/Unix Commands & Administration

Shell Scripting Bash, Sed/Awk

Coding Perl, Python, Ruby

Configuration Management Puppet, SaltStack, Chef

Bare Metal Configuration Cobbler, Foreman, PXE, DHCP, DNS

DevOps Skill Matrix


DevOps Cycle


Provisioning Configuration Integration

Load Balancer

WebServer WebServer

DB Master

DB Slave DB Slave

Load Balancer

WebServer WebServer

DB Master

DB Slave DB Slave

DevOps Life Cycle


DevOps Tools

Tools for DevOps can be categorized based on the layer of Automation you choose

Each layer has its own tools to build Automation

Infrastructure Automation 1. Cobbler2. Foreman3. Crowbar

Configuration Management 1. Puppet2. SaltStack3. Chef

Continuous Integration/Deployment 1. Jenkins2. SVN, Git, Perforce3. Ant, Maven

Monitoring 1. Nagios, NewRelic, Sensu, Zabbix2. Custom Tools


Revision control System 1. Git

2. Cvs3. Subversion

Software Configuration Management 1. Clearcase2. Perforce3. Accurev

Virtualization management Software 1. Vcentre2. Hyper-V

DevOps Tools (Contd.)


Integration Engineer Cloud Specialist

Automation Engineer Release Engineer

DevOps Roles


The most common DevOps challenges are:

Cultural mindset as “How the typical mindset of people could be taken off “

Transitions - “How quickly an organization can build the skill set and cross train people”

DevOps is not a technical problem, it is a business problem as “stake holders are engaged more often”

DevOps is not just about having latest tools

Other DevOps Challenges


Work of a System administrator:

» Install servers

» configure them

» maintain them

» Update the configuration periodically

Why Puppet?


Why Puppet?

It is tough to scale without automation in place.


Puppet is a configuration management tool that is used for deploying, configuring, managing servers.

Features:

Why Puppet?

It controls all the steps, right from the bootstrapping to the end of Server life

Can define configuration at the node level

Can group them according to roles

Example: WebSevers, DB Servers.

Maintains consistency across nodes

Example: if a change is done locally, it is rolled back to the original configuration


Advantages of Puppet

Keeps verifying the configuration at specific interval

It defines configuration with the help of Puppet Master

Large open-source developer base

It works smoothly even with large infrastructure

The language used is easy.


Puppet works on the Master Server model

Puppet Master: This machine contains all theconfiguration for different hosts. Puppet masterruns as a daemon on this master server.

Puppet Agent: Daemon which runs on each nodeand talks to the master on a regular interval.

The connection between these two machines is made in a secure encrypted channel with the help of SSL

How Puppet Works?


Following are the steps for Puppet configuration:

1. Clients connects to master and master identifies the configuration according to client type.

2. Master builds the Configuration that needs to be applied to a host, compiles it and makes it ready

3. Clients pull the Configuration and apply them on the respective nodes

Puppet Configuration


Demo on Puppet

www.edureka.co/apache-spark-scala-training

LIVE Online Class

Class Recording in LMS

24/7 Post Class Support

Module Wise Quiz

Project Work

Verifiable Certificate

Course Features


Questions


Module 1

» Introduction to DevOps and its Necessities

Module 2

» Understand Common Infrastructure Servers

Module 3

» Implement Automated Installations and Deployments

Module 4

» Understand Performance tuning aspects and basic Security for Infrastructure

Course Topics

Module 5

» Basics of Bash/Python Scripting

Module 6

» Basics of Virtualization and it's Concepts

Module 7

» Monitoring And Logging

Module 8

» Useful DevOps Tools & Commands

devops : automate your infrastructure with puppet

Technology

devops bridges

devops skill

operations changes

deployed development

view devops course details

agile software development

software developers

testing team operations