DevOps_1698587929.pdf cours ciCd automatique

DevOps
Tutorial
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Module 1:
DevOps Overview

Why DevOps?

Waterfall Model
Requirements
Designing
Implementation
Testing
Deployment
Maintenance
In the early year of software
development when it was just
coming up, waterfall model was
used.
Waterfall model is a very standard
model used in many different fields,
not just software development.
It was very useful when the
requirements were concrete and the
development cycles were long.

New Methodologies
Spiral Model
Agile
Extreme Programming
Develop an
overall model
Build a
feature list
Plan by
feature
Design by
feature
Build by
feature
Feature Driven Development
Lean Methodology

What is DevOps?

What is DevOps?
Way of software
development
Values & Principle Methodologies Tools

What is DevOps?
The name DevOps comes from Developer and Operations. DevOps bridges
the communication gap between the software developers and the It operation
teams.
Developers Operations
DevOps

What is DevOps?
“DevOps is a set of practices that combines software development (Dev)
and IT operations (Ops). It aims to shorten the systems development life
cycle and provide continuous delivery with high software quality. DevOps is
complementary with Agile software development; several DevOps aspects
came from Agile methodology.”

Benefits of DevOps
Productivity
Excellence
Returns

DevOps Phases

Continuous
Monitoring
Continuous
Deployment
Continuous
Integration
DevOps Phases
Continuous
Testing
Continuous
Development

Who is a DevOps Engineer?

DevOps Engineer
- Basically a DevOps engineer is responsible for designing, maintaining the
software development pipeline. He also makes sure that a software is
deployed properly without any issues. A DevOps engineer knows how to
automate processes and writing automation scripts. He also knows how to
keep the whole infrastructure secure and robust.
- A DevOps engineer has excellent communication skills that help him to
convey ideas and exchange information between different teams.
- On daily level, a DevOps engineer is responsible for makes sure scaling
needs of cloud are fulfilled, optimisation, managing permissions,
documentations.

DevOps Engineer
A DevOps engineer has a wealth of knowledge such as:
• Knowledge of Linux, Windows Operating Systems
• Database Tech
• Server Tech
• Orchestration
• Cloud tech
• Source Control
• Continuous integration & Deployment
• Automation
• Scripting
• Networking
• Excellent Communication

These days when software is developed, It is not developed with the mind-set
that there will only be one piece of code that will be deployed and that’s it.
These days smaller snippets of code are deployed in regular successions with
regular feedbacks. This leads to many different versions of the code.
And that creates a need to organise the code and all of its different version of
it. This is where Version Control comes in. It is a practice of managing and
storing different version of a source code.
This is especially the case with Larger companies that have multiple projects
and multiple teams working within it.
What is Version Control?
A1, A2, A3 B1, B2, B3 C1,C2,C3

What is Git?
Git is an open source version control system that allows the user to keep track
of all the changes that have been made to the source code of the software.
Developer 1
GitHub
Developer 2

Staging
What is Git?
The lifecycle of the code within Git.
GitHub
Working Directory Local Storage
Initialization

Git Installation & Setup
Windows
Linux MAC

Microsystems & Containerization
– Docker

Issues we faced before Containerization

Developer Tester
Standard Delivery Pipeline

Developer’s Environment
Operating
System
Pytest 5.4.3
Backend Developer
Backend Code Dependencies
Pycharm IDE

Tester’s Environment
Operating
System
Pytest 5.3.0
Tester
Spyder IDE

Developer Tester
- This Code runs fine on my computer - This Code does not run on my system

Developer Tester
Operating
System
Pytest 5.4.3
Pycharm IDE
Operating
System
Pytest 5.3.0
Spyder IDE

- Now Let’s see what happens
when we introduce Containers.

Developer Tester
Similar Delivery Pipeline but with containers
Prod
- This Code runs fine on my computer
- This Code runs fine on my computer

What is a Container?
Code Libraries
Container Systems & Servers
Containers are software that wrap up all the parts of a code and all its
dependencies into a single deployable unit that can be used on
different systems and servers.

What is Docker?
Docker is a tool that helps in developing, building, deploying and executing software in
isolation. It does so by creating containers that completely wrap a software.
The Isolation provided by container gives a layer of security to the
containers.

Why Docker?
Fast Easy Collaboration
Built for Developers, by
Developers
Docker Community
Simple

Docker Installation & Setup
Windows
Linux MAC

Docker Objects
Docker Environment
Docker Compose Docker Swarm
Docker Engine Docker Registry

Docker Engine
Docker engine is as the name suggests, its technology that allows for
the creation and management of all the Docker Processes. It has three
major parts to it.
Docker API
Docker CLI Docker Daemon

Docker Objects
Docker Swarm Nodes &
Services
Docker Images Docker Containers Docker Volumes
Docker Networks

Docker Objects - Images
Docker images are sets of instructions that are used to create
containers and execute code inside it.

Let’s pull an image and work with
it.
Docker Objects - Images

Continuous Integration - Jenkins

1. Why Continuous integration?
2. What is Jenkins?
3. What are Jenkins Features?
4. Jenkins architecture
5. Jenkins installation & setup
6. Setting up a CI/CD pipeline
Agenda

Why continuous integration?

Why continuous integration?
Standard Delivery Pipeline
Deployment
Tester
Code
Source Code
Manager

What is Jenkins?

Jenkins is an Open Source continuous integration tool written in java
that allows us to automate the software development process, making
sure that there is minimum involvement from us. It also integrates all
the different parts of the development.
What is Jenkins?

What is Jenkins?
Deployment
Tester
Code
Source Code
Manager Jenkins

- Jenkins is a community tool – Its open source and has a very very
large community that contributes to it regularly.
- It’s free, so you don’t have to accrue anymore subscription costs.
- It is highly modifiable and adaptable and has a support for a very
large number of plugins.
- It can run on any major platform without any compatibility issues.
Benefits of Jenkins

Jenkins Pipeline
Code
Source Code
Manager
Jenkins
building
Testing
Staging
Production
feedback

Jenkins Installation & Setup

Continuous Monitoring – ELK &
Prometheus & grafana

Why Continuous Monitoring?

Why Continuous Monitoring?
Continuous Monitoring is an important part of Software Development. It
is something we take up as measure to maintain the health of a
software and to improve the quality of the software, and this is based
on the feed back we get from the insights gained from monitoring.

What is ELK stack?

What is ELK stack?
ELK stack is a set of open-source tools that allow us to monitor, collect, process
analyze & visualize data, this data can be of different types and formats and
from almost any source. It was developed by Elastic co. iteratively. They started
with Elastic search and kept on adding more tools to the stack. The primary
purpose of ELK stack is log management.

ELK features
Scalability and
Resiliency
Dashboards &
Visualisations
Stack Security &
Alerting
Logging
System & Application
Performance

ELK Stack
Elastic search
Logstash
Kibana
Filebeat
X-Pack
Security
Alerting
Reporting
ML
Elastic Cloud / Infrastructure

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