Kubernetes Operator Tutorial

1. What is a Kubernetes operator?
2. How do you create an operator in Kubernetes?
3. What is the use of Kubernetes operator?
4. How do you create an operator?
5. Is Kubernetes a framework?
6. What is Strimzi operator?
7. Is Kubernetes written in Go?
8. How does Kubernetes controller work?
9. What is a ServiceMonitor?
10. How do I write CRD in Kubernetes?
11. What is CoreOS based on?
12. What is operator framework?
13. What is PostgreSQL operator?

What is a Kubernetes operator?

A Kubernetes operator is a method of packaging, deploying, and managing a Kubernetes application. ... A Kubernetes operator is an application-specific controller that extends the functionality of the Kubernetes API to create, configure, and manage instances of complex applications on behalf of a Kubernetes user.

How do you create an operator in Kubernetes?

Create a Kubernetes Operator in Golang to automatically manage a simple, stateful application

1. Prerequisites. To create Kubernetes Operator and use this demo, first install the following: ...
2. Build and initialize the Operator. ...
3. Create custom resource definitions. ...
4. Set the controller. ...
5. Run the Operator. ...
6. Conclusion.

What is the use of Kubernetes operator?

Operators are software extensions to Kubernetes that make use of custom resources to manage applications and their components. Operators follow Kubernetes principles, notably the control loop.

How do you create an operator?

To create an operator

Click the plus sign to expand SQL Server Agent. Right-click the Operators folder and select New Operator. Change the name of the operator. Enable the operator.

Is Kubernetes a framework?

Kubernetes provides you with a framework to run distributed systems resiliently. It takes care of scaling and failover for your application, provides deployment patterns, and more. For example, Kubernetes can easily manage a canary deployment for your system.

What is Strimzi operator?

Strimzi provides a way to run an Apache Kafka® cluster on Kubernetes or OpenShift in various deployment configurations.

Is Kubernetes written in Go?

Kubernetes, in short, is an open source system for managing clusters of containers. ... The Kubernetes project is written in the Go programming language, and you can browse its source code on GitHub.

How does Kubernetes controller work?

In Kubernetes, controllers are control loops that watch the state of your cluster, then make or request changes where needed. Each controller tries to move the current cluster state closer to the desired state.

What is a ServiceMonitor?

ServiceMonitor, which declaratively specifies how groups of services should be monitored. The Operator automatically generates Prometheus scrape configuration based on the definition.

How do I write CRD in Kubernetes?

The apiVersion key specifies which version of the Kubernetes API you're using to create this object. To create a new CRD, we use “apiextensions.k8s.io/v1beta1” as the value. The kind key specifies what kind of object you want to create. As we are about to create a CRD, we put “CustomResourceDefinition” as the value.

What is CoreOS based on?

Container Linux (formerly CoreOS Linux) was an open-source lightweight operating system based on the Linux kernel and designed for providing infrastructure to clustered deployments, while focusing on automation, ease of application deployment, security, reliability and scalability.

What is operator framework?

The Operator Framework is an open source toolkit to manage Kubernetes native applications, called Operators, in an effective, automated, and scalable way.

What is PostgreSQL operator?

An operator is a reserved word or a character used primarily in a PostgreSQL statement's WHERE clause to perform operation(s), such as comparisons and arithmetic operations. Operators are used to specify conditions in a PostgreSQL statement and to serve as conjunctions for multiple conditions in a statement.