examples
kubebuilder
| examples | kubebuilder | |
|---|---|---|
| 2 | 45 | |
| 176 | 7,407 | |
| 0.0% | 1.0% | |
| 0.0 | 9.3 | |
| over 1 year ago | 6 days ago | |
| Shell | Go | |
| Apache License 2.0 | Apache License 2.0 |
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examples
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Strato DynDNS Controller for Kubernetes
You’ll need a Kubernetes cluster to run against. You can use KIND or K3D to get a local cluster for testing, or run against a remote cluster Note: Your controller will automatically use the current context in your kubeconfig file (i.e. whatever cluster kubectl cluster-info shows).
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Testing integration of multiple images?
See also https://github.com/kind-ci/examples
kubebuilder
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SpinKube: Orchestrating light, fast and efficient WebAssembly (Wasm) workloads in Kubernetes (k8s)
The Spin operator uses the Kubebuilder framework and contains a Spin App Custom Resource Definition (CRD) and controller. It watches Spin App Custom Resources and realizes the desired state in the K8s cluster. Aside from the immediate benefits gained by running Wasm workloads in k8s, additional optimizations such as Horizontal Pod Scaling (HPA) and k8s Event-driven Autoscaling (KEDA) can be achieved in a pinch.
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Building a Kubernetes Operator with the Operator Framework
kubebuilder: brew install kubebuilder
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Annotations in Kubernetes Operator Design
The operator that I've been working on is designed to manage the full lifecycle of a QuestDB database instance, including version and hardware upgrades, config changes, backups, and (eventually) recovery from node failure. I used the Operator SDK and kubebuilder frameworks to provide scaffolding and API support.
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Kubebuilder Tips and Tricks
Recently, I've been spending a lot of time writing a Kubernetes operator using the go operator-sdk, which is built on top of the Kubebuilder framework. This is a list of a few tips and tricks that I've compiled over the past few months working with these frameworks.
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We moved our Cloud operations to a Kubernetes Operator
Since we built our operator using the Kubebuilder framework, most standard monitoring tasks were handled for us out-of-the-box. Our operator automatically exposes a rich set of Prometheus metrics that measure reconciliation performance, the number of k8s API calls, workqueue statistics, and memory-related metrics. We we were able to ingest these metrics into pre-built dashboards by leveraging the grafana/v1-alpha plugin, which scaffolds two Grafana dashboards to monitor Operator resource usage and performance. All we had to do was add these to our existing Grafana manifests and we were good to go!
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Has anyone ever tried to learn how k8s works?
I wrote a CSI driver and some operators. I admire K8s, because you can find solution to almost any problem in the source code - API versioning, load balancing, request throttling, optimistic concurrency, security, and much much more. I recommend https://book.kubebuilder.io/ It is similar to Operator SDK, but without Openshift-specific stuff. It gradually introduces you to many k8s concepts, and follows design patterns that k8s uses internally.
- What Is A Kubernetes Operator?
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If you write a Kubernetes Operator: Events vs Conditions?
Do you mean this: https://book.kubebuilder.io/ ?
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Kubernetes Operators
https://book.kubebuilder.io/ all you need to know
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Writing a Kubernetes Operator
A better way to write an operator these days is to use kubebuilder [1].
My complaint is that I have seen orgs write operators for random stuff, often reinventing the wheel. Lot of operators in orgs are result of resume driven development. Having said that it often comes handy for complex orchestration.
[1]https://github.com/kubernetes-sigs/kubebuilder
What are some alternatives?
kind - Kubernetes IN Docker - local clusters for testing Kubernetes
helm-operator - Successor: https://github.com/fluxcd/helm-controller — The Flux Helm Operator, once upon a time a solution for declarative Helming.
Testcontainers - Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
client-go - Go client for Kubernetes.
strato-dyndnsassets
operator-sdk - SDK for building Kubernetes applications. Provides high level APIs, useful abstractions, and project scaffolding.
strato-dyndns - Strato DynDNS Controller updates your domains' DNS records on STRATO AG. A custom Controller is observing Domain CRs and syncing their desired state with STRATO DNS servers. THIS SOFTWARE IS IN NO WAY ASSOCIATED OR AFFILIATED WITH STRATO AG
crossplane - The Cloud Native Control Plane
kubegres - Kubegres is a Kubernetes operator allowing to deploy one or many clusters of PostgreSql instances and manage databases replication, failover and backup.
python - Official Python client library for kubernetes
spark-operator - Kubernetes operator for managing the lifecycle of Apache Spark applications on Kubernetes.
Concourse - Concourse is a container-based continuous thing-doer written in Go.