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The Grand View Research study forecasts that the DevOps market will reach US$12.85 billion by 2025. According to the rankings of Glassdoor 50 Best Jobs in America for 2021, DevOps engineer stands in the 5th position. “The role of DevOps Engineer has seen a 225% jump in postings on Indeed,” according to an SD Times report. According to Indeed and AngelList, 80% of the companies pay more than $90,000 starting salary to a DevOps Engineer. Also, 35% pay at least $115,000, and 17% pay more than $125,000. So this blog on Devops Tutorial will be helpful to cover all the major concepts of DevOps. The following topics are covered in this Devops Tutorial blog:
What is DevOps?
History of DevOps
Waterfall Model Challenges
DevOps Architecture Features
How is DevOps different from traditional IT?
How is DevOps different from Agile?
Applications of DevOps
DevOps Advantages and Disadvantages
The word DevOps is a combination of two words Development and Operations. Before getting into what DevOps is, let us get an idea about the two teams involved in software development. The development team is responsible for developing, designing, and building the application. The operation team deals with the deployment and testing of the application. If there are problems with the application, the operation team also provides feedback to the development team. Now let us get to the history of DevOps.
Let us see some important events of DevOps :
2007-2008: The DevOps idea was started
2009: In the initial stage the first conference was ” Deploys a day: Dev and Ops cooperation of flicker.” Another conference called “DevOps Days in Ghent, Belgium” also happened.
2010:DevOps days conference happened in the United States at mount view, calif.
2012: Allana browns at puppet creates a state of DevOps report
2014: Publishing the annual “State of DevOps report”
2017: Forrester Research calls 2017 “The Year of DevOps”
2018: 30 DevOps day conferences were scheduled across the united states.
As we know about the problems faced in traditional models like in the waterfall model there is a problem of a one-way stream of work. Due to which if there is any mistake the whole process repeats and there is no interaction with customers. Now, this is solved in agile by splitting the whole development plan into several iterations for a better level of production efficiency. The agile model also includes customer interaction with the company to rectify the mistakes. But there is another problem faced in Agile too.
Here, the problem arises when the development team continuously changes the code for better performance and sends the code to the operations team for testing. But there may be a delay in the operations team feedback in situations like if the developers sent code for review at night but due to the unavailability of the operations team, there will be a delay in the project feedback.
So, DevOps is the solution to this problem. DevOps is a practice or a methodology in which the development team and operations team work together by including automation at the initial stages. So they can work on rapidly changing systems, fix bugs, and help to deliver a good quality of software in time.
Let’s consider developing software in a traditional way using a Waterfall Model in this Devops Tutorial.
In the above diagram in this Devops Tutorial, you will see the phases it will involve:
The Water-fall model worked fine and served well for many years however it had some challenges. In the following diagram the challenges of Waterfall Model are highlighted.
In the above diagram in this Devops Tutorial you can see that both Development and Operations had challenges in the Waterfall Model. From Developers point of view there were majorly two challenges:
There were four major challenges they faced as per the above diagram in this Devops Tutorial:
Let us now discuss different phases of DevOps architecture:
Some of the examples of the tools used are Git, JIRA
Let us take a look at some key differences between traditional IT and DevOps in this Devops Tutorial.
Let us take a look at the workflow of traditional IT methods and DevOps to get a better understanding of the differences between them.
In traditional IT methods [specifically waterfall method] the developer writes the code in their coding environment. Once the development is complete they will inform the operations team to test the code.
Now the operations team will be taking the code from the coding repository and will be passing through some test cases. If there are any bugs detected then it’s sent back again to the development team. This is continued till the bugs are resolved. So as we can see the main problem is, there is a lot of time is wasted because the testing is done only when the coding is completed. So if there is a small mistake by developers. For finding that small mistake the whole testing process is done again. So the solution for this problem is implementing testing at the early stages [development stage].
Now if we check about the workflow of DevOps. The main feature includes Continuous Integration and Continuous Deployment pipeline. By which the previous problem can be resolved. So now the development team need not wait for the results of their code. By including the automation feature at the initial stages [development stage] we can get the knowledge about bugs at initial stages and they can be solved quickly. So there will be a faster deployment and quick delivery of the software.
|DevOps deals with filling the time gap between the development team and the operations team.||Agile methodology deals with filling the gap between customers and the company.|
|Here the feedback will be coming from the Operations team to the development team.||Here the feedback will be coming from the customers to the company.|
|It focuses on constant testing and delivery.||It focuses on constant changes.|
|Some of the tools used in DevOps: Puppet, AWS||Some of the tools used for Agile: JIRA, Bugzilla, Kanboard|
Let us see some of the top applications of DevOps in this Devops Tutorial:
United Airlines, Inc. is a major American airline. This company changed its traditional method of testing to continuous testing using DevOps which helped the company to save $500,000.It also increased its coverage of code by 85%.
KeyBank, the primary subsidiary of KeyCorp, is a regional bank headquartered in Cleveland. This bank used DevOps for the integration of security. DevOps almost decreased the time of the process from three months to one week.
This company faced a problem regarding testing their software. Here bugs are detected using manual testing after six weeks of writing code and if there are any bugs found it would take one week to fix them. So to overcome this issue they integrated the Continuous Integration and Continuous Deployment pipeline.
Rabobank is a Dutch multinational banking and financial services company. By the integration of DevOps, this company has reduced its bugs by up to 35%. Which helped the company to deliver applications faster to the clients. It also decreased the time of regression testing as it had already been tested several times while developing.
These companies faced the same problem. At the initial stages, they were adapted to monolithic architecture. But as they grew to handle the huge amount of traffic they adopted AWS cloud-based microservice architecture.
This company faced the issue regarding the monolithic architecture and there are communication issues between the teams so they integrated microservice architecture and CI/CD pipelines for point-to-point communication.
Now that we’ve covered all of the fundamentals of DevOps in this DevOps Tutorial article, you should understand why we chose DevOps over other software development methodologies [such as waterfall and agile]. Aside from that, we went through some of the most popular DevOps applications. I hope this has clarified some of the core DevOps concepts and given you a better understanding of why DevOps is needed.
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