The Operator: Firing the Shots That Killed Osama Bin Laden and My Years as a Seal Team Warrior

Product Information

The concept of Kubernetes Operators was introduced in a blog post in 2016 by CoreOS. CoreOS created their own container-native Linux operating system that was optimized for the needs of cloud architecture. Red Hat acquired the company in 2018, and while the CoreOS operating system's official support ended in 2020, their Operator Framework has thrived. In this chapter, we introduced the fundamental concepts of the Operator Framework. These include the Operator SDK, OLM, and OperatorHub. In addition to the development and distribution pillars of the Operator Framework, the Capability Model provides an additional tool for measuring the functionality of an Operator. Throughout this book, we will be exploring these components in deeper detail to get a hands-on understanding of how they actually work. Este es un libro pacifista, pero es un libro pacifista con información desde dentro, siguiendo a los generales que dirigen las operaciones, a los diplomáticos que se reunen en hoteles en grandes capitales, a los representantes en el Capitolio y la Casa Blanca. Y es un libro pacifista porque "The operators" explica lo absurdo de la Guerra contra el Terror que tuvo lugar entre 2001 y 2011 (algun@s dirán que todavía sigue) en Iraq y Afganistán. Una guerra que se produjo por un mega ataque terrorista que causó 3.000 muertos, y que solo en bajas militares (muertos y heridos) de los EE.UU se cobró más de 45.000. Una guerra que ha costado miles y miles de millones de dólares y que ha conseguido muy poco.

I wish I would've read this a few years ago. It's so horrendous how politicians of every stripe lies to the public about the conduct of wars. You would think that everybody learned some lessons from the Vietnam War. Finally, Abnormality Detection is the capability of an Operator to identify suboptimal or off-pattern behavior in an Operand. By measuring performance, an Operator has a picture of the application's current and historical levels of functioning. That data can be compared to a manually defined minimum expectation or used to dynamically inform the Operator of that expectation. The Capability Model is divided into five hierarchical levels. Operators can be published at any one of these levels and, as they grow, may evolve and graduate from one level to the next as features and functionality are added. In addition, the levels are cumulative, with each level generally encompassing all features of the levels below it. Level V—Auto Pilot: Level V is the most sophisticated level for Operators. It includes Operators that offer the highest capabilities, in addition to the features in all four previous levels. This level is called Auto Pilot because the features that define it focus on being able to run almost entirely autonomously. These capabilities include Auto Scaling, Auto-Healing, Auto-Tuning, and Abnormality Detection. Level II—Seamless Upgrades: Operators at Level II offer the features of basic installation, with added functionality around upgrades. This includes upgrades for the Operand but also upgrades for the Operator itself.The Operator's name and version number, as well as a description of the Operator and its display icon in Base64-encoded image format These objects include Pods, Replicas, Deployments, Services, Volumes, and more. The orchestration of any microservice-based cloud application on Kubernetes relies on integrating these different concepts to weave a coherent whole. This orchestration is what creates a complexity that many application developers struggle to manage. Demonstrating on a sample application In most ways, this casualty is unavoidable. The fog of war and its power to suffocate the truth is providential in many ways. It shields the troop movements, motives, and subversions needed for victory on either side. It also covers a multitude of sins on the part of the men fighting the war. So, what happens when a journalist is given unprecedented access and candor from a general and his staff in a war that can't be won? What happens when that journalist bravely takes his mission seriously enough to try and keep the truth alive?

The Operators that are written following the guidelines of the Operator Framework are designed to function very similarly to native controllers. They do this by also monitoring the current state of the cluster and acting to reconcile it with the desired state. Specifically, an Operator is tailored to a unique workload or component. The Operator then knows how to interact with that component in various ways. Knowing key terms for Operators

Auto-Healing Operators can react to applications that are reporting unhealthy conditions and work to correct them (or, at least, prevent them from getting any worse). When an Operand is reporting an error, the Operator should take reactive steps to rectify the failure. In addition, Operators can use current metrics to proactively prevent an Operand from transitioning to a failure state.

Later chapters will demonstrate exactly how to use these commands and what they do, but the general idea is that these commands first compile the Operator's Go code into an image and a deployable format that's understandable by OLM. But OLM isn't the only part of the Operator Framework that consumes an Operator's bundle—much of the same information is used by OperatorHub to provide information on an Operator. As I was growing into adolescence, my dad and I developed an unusual father–son relationship, becoming more like best friends. It began when my mom moved us from up on the “hill”—where all my neighborhood buddies lived—to a place downtown, not far from the Berkeley Pit, where I didn’t know anybody. I was looking for something to replace all those ninja hijinks with my friends when I saw a video—Michael Jordan’s first, Come Fly with Me. I was instantly captivated. It begins with Jordan all alone, shooting baskets in a completely empty gym. His voice-over says, “I could never stop working on it. Each day I feel I have to improve.” And then of course there are endless scenes of Air Jordan, defying gravity, cutting through defenders as if they’re no more substantial than the atmosphere itself.Should any of the Pods fail during this process, the Operator would be smart enough to know to fail over to a different Pod or cluster zone entirely. Alternatively, if a new version of the web app was released that introduced an unexpected bug, the Operator could be aware of the previous successful version and provide ways to downgrade its Operand workloads if an administrator noticed the error. Custom Resources are created as API objects following the constraints of a matching CustomResourceDefinition ( CRD). CRDs are themselves a type of native Kubernetes object that allows users and administrators to extend the Kubernetes platform with their own resource objects beyond what is defined in the core API. In other words, while a Pod is a built-in native API object in Kubernetes, CRDs allow cluster administrators to define MyOperator as another API object and interact with it the same way as native objects. Putting it all together Similarly, support for scaling an Operand with worker instances that operate with read-only functionality. This is an elaboration of Michael Hastings's Rolling Stone article--you know, the one that got four-star general Stanley McChrystal canned as head of the Afghan war. Hastings embeds with JSOC, the snake-eaters, for a wild ride through Paris, then on to Kabul and beyond. I did think, briefly, about going out of town to college, though my idea of out of town was the University of Montana in Missoula, less than two hours down the highway. When it came to it, I just didn’t have the desire. Or maybe I didn’t have the courage. When you’re a small-town kid from Montana, there’s this sense that venturing into the big, scary outside world might pulp you as surely as that conveyor belt. Montana Tech was the safe alternative. I also had a better chance of making the basketball team there. I was a good high school player, but at 6'1" I wasn’t high enough off the floor to impress at the college level. I figured I’d play my ass off on the practice team and work my way in. It went well. I had a great time, got in great shape. Physically. Mentally, well there was the girl.