According to reportlinker.com, the DevOps market size is forecasted to grow from ~$3.4B in 2018 to ~$10.3B by 2023, at a Compound Annual Rise rate of 24.70 percent during the forecast period. Being in computers field, you must be aware about this buzzword “taking the IT world by storm, that is “DevOps”. This tutorial will take you through the main concepts of DevOps with its important tools and use cases.
Here we have the list of topics if you want to jump right into a specific one:
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Don’t get scared with this term “DevOps”, it is nothing but a practice or methodology of making “Developers” and “Operations” folks work together, hence the term “DevOps”. How exactly is this achieved, will discuss as we move further.
Before understanding the concepts and methodology of DevOps, we need to understand why do we even need DevOps? Why DevOps? Why not other methods?
First let’s understand the “Need of DevOps”.
Before DevOps, Waterfall Model was the earliest SDLC approach which was used for Software Development. This method was reliable at first which was used for illustrating the software development process in sequential flow.
Let’s consider you’re developing your software using the Waterfall Method. So, these are the aspects that will occur during your SDLC if you’re using this method:
Feasibility phase is used for determining whether this approach/technique will be feasible enough for developing the software.
Analyze from the customers point of view and gather the information about the system and the software requirements, these requirements list will be captured in a document in a need to remove any incompleteness in that particular product.
The goal of this phase is to transform software requirement specification (SRS) document into an ordered structure which is appropriate for the implementation in a programming language
The design that we created previously is supposed to get converted into a source code then every design module is coded and checked individually if they are working in a proper manner.
After the design of each modules have been coded, then the integration of these modules is carried out appropriately, then these integrated modules are tested individually as a resultant. After this an acceptance testing is carried out in which product is delivered and tested by the customer whether to accept it or reject it.
Maintenance is that phase of the software lifecycle where 60% of the efforts are spent during the whole software development process. Several Maintenance operations like Corrective Maintenance, Perfective Maintenance and Adaptive Maintenance where error corrections, functionalities enhancement along with trying these software’s on new environments and operating systems.
So, now let’s discuss about what were the Advantages & Disadvantages of this this model.
So as a solution to this, Agile method came into existence.
Agile refers to an incremental approach like Waterfall model, but with the iterative approach along with focussing on customers feedback and small rapid changes as well as releases. It basically breaks the product into smaller divisions and finally integrates them for the testing process.
Similarly, let’s take a look at their Advantages & Disadvantages.
So, in a nutshell, when Waterfall Model failed to deliver the consistency in the result, Agile Methodology came into existence to overcome them. However, there were many disadvantages in Agile itself as discussed above. And the main problem faced were the gaps created in these both the methods as:
(Gaps created between customers & developers)
How do you think it was overcome?
Then DevOps was introduced in order to overcome this gap between Developers and Operations folks.
Difference between Agile and DevOps
|Agile Methodology||Simply DevOps|
|Majorly focuses on collaboration, customer feedback, and small, rapid changes||It brings Developers and Operations team together|
|It does not focus on Automation||Its primary goal is the Automation in order to increase the efficiency while deployment|
|Development process is inherent for Agile, making it majorly focused towards Development process instead testing and implementation process||Whereas, DevOps focuses on all Development, testing and implementation with equal importance|
|It overcomes the gap between customers and developers||It overcomes the gap between Developers and Operations folks|
How DevOps works can be understood with its lifecycle, let’s move forward.
DevOps basically emphasis on bringing all the Development and Operations + IT infrastructures guys together, which includes developers, system admins, QA’s. Testers etc also called as DevOps Engineers having the end-to-end responsibility from gathering information for development, to testing, to deployment of Infrastructure, to application deployment along with the monitoring & also getting feedback from the end users for making any better improvements, so this process of developing, testing, deployment and monitoring-gathering keeps on going for better results.
You can actually figure it all out from the DevOps diagram below, whatever the process flow we discussed here can be understood with a gist through this DevOps diagram.
2. Build: You build the version of your program in any extension depending upon the language you’re using.
3. Test: For DevOps to be successful, you must Automate all the testing process using any automation tools like Selenium etc.
4. Release: Process for managing, planning, scheduling and controlling the build in different environments after testing and before deploying.
5. Deploy: Then Deploy is to get all your application’s artifacts/all your code files and deploy or execute them on the server.
6. Operate: Then we run that application after the deployment, where users are using it as a real use case.
7. Monitor: Monitor helps in providing a crucial information which basically help you to ensure the service uptime and the optimal performance.
8. Plan: Gather all the information through monitoring and whatever the feedback you received through the monitoring, you implement those changes for the better performance.
Now let’s discuss about different stages in DevOps Lifecycle which contributes to the consistent software development lifecycle:
These stages are basically the aspects for achieving the DevOps goal.
Now let’s Discuss each of them in detail.
In Waterfall Model, your software product parts get broken into multiple pieces or sub-parts for the short development cycles but in this stage, your software is getting developed continuously.
As we Code & Build in this stage, so one can use GIT to maintain the different versions of the code and to build/package the code into an executable file, we use a reliable tool called as Maven.
In this stage, if your code is supporting a new functionality, it is then integrated with an existing code continuously. As the continuous development keeps on taking place the existing code needs to be integrated with the latest one “continuously”, also the changed code should ensure that there are no errors in the current environment for them to work smoothly.
Jenkins is the tool that is used for the Continuous Integration here, one can pull the latest code from the GIT Repository, of which you can produce the build and deploy on test or the production server.
In this stage, your developed software is being tested continuously to detect the bugs using the several automation tools.
So, for the QA/Testing purposes, one can use the automated tools for it and the tool used widely for automation testing is Selenium, as it lets the QAs to test the codes in parallel fashion to ensure that there is no error, in-competencies or flaws in the software.
Continuous monitoring is a very crucial part of the DevOps life-cycle where it helps in providing the important information which basically helps you to ensure the service up-time and the optimal performance. The operations team get the results from the reliable monitoring tools to detect and fix the bugs/flaws in the application.
Several tools like Nagios, Splunk, ELK Stack and Sensu are used for monitoring the application.
They help you to monitor your application and servers closely to check their health and if they are operating actively or not, any major issue detected by these tools are forwarded to the developer’s team for them to fix them in the continuous development phase.
As we have discussed about DevOps and its main tools along with their functionalities, now let’s move forward and discuss about a very famous use case of DevOps in Netflix.
Some of the most popular DevOps tools are –
After successfully being implemented on-premise, now DevOps is being called as the key to speed-up the cloud platforms. Its all-rounder performance has attracted aspirants to build a career in this domain and hence having sound knowledge is imperative for them.
DevOps is a contemporary approach that lets companies to realize numerous benefits by its deployment. Some of the major DevOps benefits are as follows :
Let’s understand how Netflix uses DevOps Methodology to provide its customers with the best and smooth video streaming experience. Netflix used Spinnaker Continuous Delivery Platform for the Continuous Delivery of its application. Before reaching to Spinnaker for the Continuous Delivery there were number of steps which were supposed to take place.
Let’s understand from the diagram below:
Before going up for the deployment using Spinnaker, the code is first built and tested
(A simple Java Application build.gradle file)
After the continuous integration, deployment and final availability, then application goes live.
DevOps is merely a culture which is being incorporated by the giants in IT world.
DevOps, when practiced the right way, keeping certain roles and responsibilities in mind, helps overcome the gap between development and operation.
The said roles and responsibilities of DevOps engineers are as follows:
The main objective of these roles and responsibilities is to be able to perform coding, scripting and process re-engineering.
Following are job opportunities in DevOps:
So, from this tutorial, you got the detailed understanding of DevOps, its workflow, its need and its various use cases.
While here we covered quite a bit of DevOps core functionality, there is still a lot to know about it. If you’re looking forward to learning more about it, then you must go for a structured DevOps training provided by Intellipaat, where you will work on various case-based scenarios along with the exhaustive topic wise assignments, hands-on sessions and various industrial based projects which prepares you from scratch to top notch understanding of DevOps.
We would suggest that you practice this example which is explained above. If you’re willing to enter in DevOps domain or up-skill yourself with this domain, then you must go with DevOps Certification Training which will help you understand the most important tools and frameworks that you must learn and practice to become a successful and a productive team member at your workplace.
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