DevOps: what it really is
We finished book "DevOps Philosophy", and also plan to make a new book on this topic.
A lot of copies are broken about what DevOps is and what is not, as well as about the ratio of DevOps and continuous integration. Therefore, we ask you to speak out as objectively as possible. Do you share the viewpoint of today's author Adam Mackay on the essence of DevOps - or, in your opinion, is the picture he proposed in something incomplete or engaged?
We read and comment!
rawpixel from Unsplash
The principles of our company are based on the Three Way Model. It was developed by Gene Kim, the author of “Visible Ops” and “The Phoenix Project” and Mike Orzen, the author of “Lean IT.” We recommend building an environment in which systemic thinking is stimulated, feedback cycles are enhanced, and a culture of continuous experimentation and learning is imparted.
Constantly think about the whole system. Ask yourself: “How to set up even more feedback cycles?” Monitoring, metrics and logging are three such cycles that help administrators participate in the design. In a healthy DevOps environment, processes that stimulate the creation of short and effective feedback cycles are stimulated, examples of such processes include incident management, objective analysis of post-mortem levels, and ensuring transparency 3r-3247.
“Handshake in front of MacBook Pro”, user snapshot 3-333101. rawpixel
3r3197. Flexible management 3r3198.
Flexible = easy. Subdivide your project into small areas of work, lead the assembly, limiting the work in progress (progress limit), introduce feedback loops and achieve visualization. This is my favorite element of any project; flexible management techniques provide a more efficient way out, including improving throughput and system stability; employees experience less stress at work, get more job satisfaction.
3r3197. First people, then processes, then tools [/i]
One of the first methodologies proposed by the DevOps pioneers is formulated as “first people, then processes, then tools”. In our company, it is recommended first of all to agree on who is responsible for a specific work task. Then we determine which processes are needed to solve this problem. After that, the tools needed to implement the process are selected. On paper, all this seems logical, however, engineers and managers often succumb to catchy “hurry to buy!” From suppliers and in this case they try to do exactly the opposite: buy a tool, and then build an entire task flow under it.
3r3197. Continuous delivery [/i]
This term is so on everyone’s lips that it is sometimes even mistakenly equated with DevOps. In principle, this is the practice of dynamic programming and software testing, providing quick releases of very small full-fledged fragments. In general, continuous delivery can improve overall quality and speed. Continuous delivery is a key component of the project that needs to be established as early as possible, the driving force behind the successful implementation of DevOps.
3r3197. Change Management [/i]
In my experience, there is a direct correlation between how well the system is being operated and how change management is organized. This does not mean that you need to implement traditional control, which slows down development and hurts rather than helps. In this case, a scalable and reliable platform is needed for continuous delivery. Focus on eliminating fragile artifacts, reproducing the build process, managing dependencies, and creating an environment conducive to continuous improvements.
3r3197. Infrastructure in code (Configuration in code All in code) 3r3198.
One of the revelations that the current company has enriched me with is that any systems can and should be interpreted as code. System specifications are entered into version control systems and reviewed by colleagues. Using modern deployment mechanisms, in particular, Docker and Kubernetes, you can automatically assemble, test and create real systems based on the specification and programmatically manage them. This approach allows you to compile and run the system, and not to fence labor-intensive long-term crutches, which over time it becomes very difficult to develop.
3r3197. Practice 3r3198.
In all previous IT organizations where I used to work, the approach to projects was: “let's write something and then we will entrust it to someone to test and deploy”. Such a method does not agree well with the plans. The deadlines are shifted, and when the development team moves on to the next project, the operational costs become too heavy.
“A roller coaster under a blue sky and white clouds,” user snapshot 3r3185. Priscilla Du Preez
In the current organization, we strive to ensure that the developers continue to keep abreast of the service they have created and are partially responsible for its operation. The result is more effective feedback cycles that help the team respond much more quickly not only to bugs, but also to new features and ensure that the product is developing in the right direction.
3r3197. Tools 3r3198.
We love our tools! They help the engineer program, build, test, package, release, configure, and track both systems and applications. We master our tools and we know the whole range of solutions we are interested in - both open-end and commercial. Before the DevOps paradigm began to evolve, innovations and tools remained in stagnation. I have long used the same toolkit as at the very beginning of my career (I have been programming since 2000). Many tools used in DevOps are amazingly multifunctional and help to completely organize the life cycle of a service in a completely new way.
“All kinds of carpentry tools in the workshop” from the selection 3r-3212. Barn Images
You must decide on a reliable toolkit for DevOps. There is no single tool for all occasions, you need a whole line, the inventory of which can be combined with the existing needs. And since we want all this to work together any tool is only as useful as it helps our entire system.
You need to choose such tools that are well combined with the rest of the inventory. Tools should help automate any work. They should be easy to call from the API or from the command line. In principle, tools that rely heavily on UI do not even fit well into well-integrated tools.
Download the docker image and start experimenting. Fork another code and start to build it. Spin up a server or server cluster with Kubernetes. So you do DevOps. Start on your own computer, and then go to the cloud.
“A boy standing on a ladder and reaching for the clouds”, shot Samuel Zeller from Unsplash
When you first hear about the paradigm of “infrastructure in code” or “continuous delivery”, it immediately pulls you to say “no, we work differently”. However, to succeed with DevOps, you need to gradually master these techniques, they are not so difficult. For many years, in our industry, methods directly opposed to DevOps have been used, but DevOps really works.
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