Explore details on anonymous struct and interface — When reading through Kubernetes open-source code, we will always see those familiar faces and anonymous fields. admission.Request in controller-runtime is a struct including anonymous fields. type Request struct { admissionv1.AdmissionRequest } Anonymous field is unique and a feature shared by Go and Rust only, but not languages like Python or…

ChatGPT facilitates Kubernetes coding but with drawbacks — ChatGPT is taking the world by storm. Overnight, developers, designers, and product managers, or we can say, people from all over the world, are constantly testing its features and challenging its limit. I am one of those who dip their toes into the pool to see how ChatGPT can help…

Featuring encryption, anonymization, hashing, and access control — Network security incidents occur now and then, mostly caused by data leakage. Data security has aroused widespread concern, and the community keeps working hard on approaches to simplify data security, especially in sensitive data protection. Sensitive data includes but is not limited to personally identifiable information (PII) like names, ID…

Coding examples step by step — We’ve started this series by introducing the four basic dependency packages and their applications in operator CRD implementation. Let’s go down the path to see their usages in the controller development: api, apimachinery, and controller-runtime still play big roles. We use the first two extensively to obtain resource-related field information…

Get to know Kubernetes API, apimachinery, client-go, controller-runtime to facilitate Kubernetes Operator Development — I’ve shared some pieces on developing operators with kubebuilder, from beginner-level to advanced, with practices and examples. I would like to continue with operator development, not the big picture but a series on practical tips for saving effort and boosting efficiency. As both CRD design and controller implementation, the two…

A deep dive into obtaining network maps and correlating IP with cluster workloads to speed up debugging — Kubernetes, as the de facto standard deployment platform, has enabled developers to deploy production apps with a CI/CD pipeline quickly. Its use, however, has resulted in resource numbers rocketing in Kubernetes clusters. For better platform maintenance, we need higher observability to help us monitor cluster health status timely.

Explore the benefits of SSA vs. CSA — “Operators are software extensions to Kubernetes that make use of custom resources to manage applications and their components.” https://kubernetes.io/docs/concepts/extend-kubernetes/operator/ The operator pattern is what we can rely on when there are tasks that native resources like Deployment and Pod fail to fulfill: CRD enables the addition of various fields; webhook…

Alternatives for the ternary operator in Go — If you were like me, a pure Java developer before writing Go, you must be wondering why Go doesn’t support the ternary operator like return a > 1 ? 0 : 1. Most mainstream languages like C and Java are supportive of ternary operators; languages like Python and Ruby support…

When and how to use the Go runtime package — The Go runtime package and its subpackage debug are very practical for managing metrics, debug, goroutine, and GC, which can also facilitate our understanding of the implementation of Go itself. This article aims to answer the following five “How To” with some usage cases and sample codes. How to use…