Kubernetes Operator Learning

我有另一篇blog专门记录了Kubernetes Operators这本书的总结: Kubernetes Operators

最近安排我去写一个operator的任务，最开始是helm-based operator, then evolve to Go-based, 挺有意思。How to explain Kubernetes Operators in plain English: https://enterprisersproject.com/article/2019/2/kubernetes-operators-plain-english

首先，从K8s官网上粗略地了解一下什么是:

Getting started with the Operator SDK This is from Red Hat, excellent!
Operator pattern

Advanced Operators are designed to handle upgrades seamlessly, react to failures automatically, and not take shortcuts, like skipping a software backup process to save time.

Complex and stateful applications are where an Operator can shine. The cloud-like capabilities that are encoded into the Operator code can provide an advanced user experience, automating such features as updates, backups and scaling.
Introducing Operators: Putting Operational Knowledge into Software
Best practices for building Kubernetes Operators and stateful apps
OpenShift operator special

CNCF:

Writing a Kubernetes Operator: the Hard Parts
Build Kubernetes Operators from Helm Charts in 5 steps However when it comes to stateful applications there is more to the upgrade process than upgrading the application itself.

Helm Charts often are insufficient for upgrading stateful applications and services (e.g. PostgreSQL or Elasticsearch) which require a complex and controlled upgrade processes beyond upgrading the application version.

一些中文资料，最近在看书Kuberneter Operators，然后被Go卡主了，准备开始学习: