Based on methodologies such as Agile and Lean, aimed at breaking the rigidity of the traditional software development models, first of all, the waterfall one, the DevOps development paradigm emerged in 2009, with the intent of further improving the speed and efficiency of the processes at the base of the creation cycle of an organization’s software products and services. The term DevOps is formed by splicing two words “development” and “operations”.
DevOps aims to establish cross-functional interaction and collaboration between two complementary worlds, but whose needs, traditionally, are often conflicting. On one hand, there is the Development Team (Dev), which designs applications and services, on the other hand there is the Operational Team (Ops), which sets the requirements for applications and services, and guarantees stability in production.
Accelerated release cycles with DevOps
As a new cultural approach to software development, DevOps aims to allow faster and more frequent release cycles, thanks to the collaboration between the development team and the operations team. Also, with DevOps, you can achieve better communication and collaboration between people and a level of automation in the development and test pipeline of the code that allows you to create the paradigm of "continuous delivery" (CD) and complete management of the life cycle of the software.
DevOps, in the definition provided by the research firm Gartner, emphasizes the value of people and represents a change in the IT culture, which focuses on the rapid provision of IT services, adopting Agile and Lean practices in the context of a system-oriented approach. DevOps implementations use technology and especially automation tools, that are able to make the most of an increasingly programmable and dynamic infrastructure for the software life cycle.
Factors that bring the use of DevOps
From the early 2000s, applications have been monolithically designed and, as a result, software releases have been performed in large blocks of code, which have been distributed with limited frequency. Thus, to meet users’ expectations and growing competitive pressure, Agile and Lean methods started to be adopted to shorten the release cycles.
But what really changed the rules of the game was the advent of cloud computing, SaaS models (software as a service) and microservices: as a matter of fact, these factors allow to provide applications as web services and, later on, as sets of microservices, which further accelerate release cycles, breaking the complexity of managing monolithic applications.
However, a quickly developed product cannot wait long for IT operations to validate its functioning in the production environment: the DevOps was created to address these challenges and to align the work rhythms of the two departments.
DataOps, the approach that speeds up data analysis
In the world, the continuously growing volume of data is now in the order of zettabytes (ZB). This trend, in 2014, led to the introduction of the DataOps approach, which applies the DevOps philosophy in this area, to increase the speed, reliability, and quality of data analysis. Like DevOps, DataOps also puts emphasis on collaboration, in this case between data analysis teams (data scientists, analysts, engineers) and IT operations.
Another key aspect of DataOps is the use of automation tools to monitor and control the analytical pipeline throughout its life cycle. The tools to apply the DataOps method do not necessarily belong to a specific category: as Gartner indicates, many of those already existing in the organization may be adequate to obtain the levels of automation required by DataOps.
In any case, it can be all those tools that are used to identify, collect, format, purify, process, aggregate, visualize, and analyze data.
GitOps: a "single source of truth" that streamlines the development of native cloud applications
When it comes to developing and implementing complex and multi-component applications, such as modern apps, based on microservices and distributed in multiple IT environments, the GitOps model helps not to lose the thread, thanks to the application of version control to all parameters and settings configuration.
Precisely, GitOps is the combination of Git, the name of the known and widespread open-source version control technology, and Ops (IT Operations), and, in essence, it is a model that allows teams to establish a single source of truth (SSOT). It ensures that the operations of managing and reviewing the resources and configuration requirements of each application are managed based on a single source of correct information.
As already mentioned, the teams in the IT departments rely on parameters and configuration files to set the functioning of the different applications; a configuration error can compromise their deployment and production operations, because each new version of the software components usually requires new parameters and configuration files.
In IT environments where models of continuous development and delivery of software are applied, it is necessary to keep all these operations synchronized with the production release; the GitOps model allows you to do this, tracking all changes and modifications, and keeping a repository and a centralized version control, for the application source code, the configuration instructions, and the operating parameters.
NoOps: means total automation of operations
In the definition of the research company Forrester, which coined the term, the NoOps (No Operations) model responds to the goal of completely automating the deployment, monitoring, and management of the applications and infrastructure on which they run. In the DevOps model, developers must release software more frequently, while operation professionals are concerned about protecting infrastructure stability. With NoOps, the idea is to eliminate the need for interaction between developers and operations, thanks to automation. In fact, the two key factors behind the idea of NoOps are the growing automation of IT and cloud computing.
In particular, in the NoOps model, using the IaaS (infrastructure-as-a-service) and PaaS (platform-as-a-service) technologies, developers can access all the resources and necessary tools to reliably implement the applications, without requiring the intervention of the operation team.
However, it must be said that the NoOps paradigm is not adoptable in all cases, and its validity is limited to applications that can be easily integrated into existing PaaS solutions, and not to monolithic legacy ones, which would require updates or heavy code rewriting interventions, to operate in PaaS mode.
In conclusion, it can be said that NoOps does not aim to replace the DevOps model, or rather to act as a complementary method, with the potential, where possible, of further improving and accelerating the application implementation process.
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