Packaging Applications and Services with Kubernetes Operators

Package applications and services for Kubernetes with the Operator framework. 

Developing Operators

Image result for operator framework image

Operators give you a convenient way to package, deploy, manage and distribute applications for Kubernetes. The method allows you to package configuration so that users can deploy operators from a simple catalog without having to engage administrators. You can distribute operators beyond your organization using OperatorHub.io which is open to all contributions or the Red Hat OpenShift OperatorHub using Red Hat's certification process. 

Download Operator-SDK binary 

Operator maturity model

Conceptually, an Operator takes human operational knowledge and encodes it into software that is more easily packaged and shared with consumers. How you approach and build your Operator is up to you. Advanced Operators are designed to handle upgrades seamlessly, react to failures automatically, and not take shortcuts, such as skipping a software backup process to save time.

A Kubernetes application is both deployed on Kubernetes and managed using the Kubernetes APIs and kubectl/oc tooling. You can think of Operators as the runtime that manages this type of application on Kubernetes.

Hands-on Operator labs

Course

Building Operators on OpenShift

9 lessons | 240 minutes

Learn about k8s API fundamentals, the etcd operator, using the Operator SDK with Go and Helm, review Ansible basics, and use Ansible to deploy Kubernetes modules.

Lesson

Operator SDK with Helm

30 minutes | Beginner

Create a CockroachDB Operator from an existing CockroachDB Helm chart, running securely without Tiller or manual invocation.

Lesson

Manage the etcd Operator

30 minutes | Beginner

Manage etcd clusters on Kubernetes and automate resize, failover, and upgrade tasks, including backup and restore actions.

Lesson

Install the Operator Lifecycle Manager

30 minutes | Beginner

Install the Operator Lifecycle Manager in an OpenShift environment, access the UI, create a subscription manifest, and approve an InstallPlan.

Lesson

Ansible Operator Overview

30 minutes | Beginner

Learn what the Ansible Operator is, how to map custom resource events, pass extra variables, leverage existing roles from Ansible Galaxy, then how to deploy and run the Operator in a local or remote OpenShift cluster.

Lesson

Mcrouter Operator powered by Ansible Operator

30 minutes | Beginner

Gather basic understanding of the Mcrouter operator that was built with the Ansible Operator SDK.

Lesson

Kubernetes API fundamentals

30 minutes | Beginner

Understand the structure and features of the Kubernetes API fundamentals.

Lesson

Ansible Kubernetes Modules

15 minutes | Beginner

Learn to use the Ansible k8s (Kubernetes) module by creating and removing Kubernetes resources and reusing existing Kubernetes manifest files.

Technology partners: Publish on OpenShift OperatorHub

operatorhub

Red Hat Partner Connect is a program for technology partners—ISVs, SIs, and VARs—that provides software, tools, and other technical resources for your development work, and marketing resources for your marketing & sales colleagues.

Certify your Operator with Red Hat Partner Connect

When you publish, you get:

security

Seal of approval

Your Operator functionality is verified by Red Hat.

Faster

Promotion

Listed in Red Hat OpenShift OperatorHub and Red Hat Ecosystem Catalog for all customers to see and download.

RHEL Release

Continuous certification

Using Red Hat Certification Build Service APIs means continuous security compliance—great for CI/CD.

RHEL Release

Support coverage

Full Red Hat support for the foundation of Operators and their containers when used with Red Hat OpenShift.

New articles about Operators

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Article

Troubleshooting application performance with Red Hat OpenShift metrics, Part 4: Gathering performance metrics

July 29, 2021

Discover the performance metrics required and how they were gathered to include Service Binding Operator in the Developer Sandbox for Red Hat OpenShift.

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Article

Troubleshooting application performance with Red Hat OpenShift metrics, Part 3: Collecting runtime metrics

July 22, 2021

Use the Red Hat OpenShift monitoring tool, based on Prometheus and Grafana, to collect runtime performance metrics and store them in a CSV file.

Featured image for Operators topics.
Article

Troubleshooting application performance with Red Hat OpenShift metrics, Part 2: The test environment

July 15, 2021

Set up the test environment in your developer sandbox, then see two performance testing scenarios for simulating active users in a project under test.

Featured image for OpenShift operators.
Article

Troubleshooting application performance with Red Hat OpenShift metrics, Part 1: Requirements

July 8, 2021

Follow along as this developer uses Red Hat OpenShift performance metrics to tune a project for use in the Developer Sandbox for Red Hat OpenShift.

Featured image for: Kubernetes configuration patterns, Part 2: Patterns for Kubernetes controllers.
Article

Kubernetes Operators 101, Part 2: How operators work

Bobby Woolf
June 22, 2021

Want to know more about Kubernetes Operators and how they extend Kubernetes? Explore the structure, workload deployment, and reconciliation of operators.

Featured image for: Kubernetes configuration patterns, Part 2: Patterns for Kubernetes controllers.
Article

Kubernetes Operators 101, Part 1: Overview and key features

Horea Porutiu, Sanjeev Ghimire & Bobby Woolf
June 11, 2021

Get an overview of Kubernetes Operators and key operator features you can use to automate the deployment and management of containerized applications.

More articles about Operators

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Adventures Aboard the Kluster Kruise Ship

This story uses a series of metaphors to introduce the concept of Operators, explain how they aid in the automation of clusters, and provide a high-level overview of Operator Lifecycle Management in a way that anyone can understand. Readers will meet Kate the octopus, esteemed cruise ship director, who finds herself overwhelmed with the responsibilities associated with her position.

 

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Interested in the Operator community?

OperatorHub is the community home for Kubernetes Operators. Find an existing Operator or list your own.

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