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…

Introduce Murre for continued monitoring of Kubernetes containers — The go-to platform for deploying applications is now Kubernetes. For one, its clusters may include hundreds of resources like pods and deployments, and it is made up of several components and user-defined operators. The variety of services, applications, and networks encapsulated in the resources make it challenging for users to…

Official tools to protect your code​ — Security vulnerabilities exist in any language and any code, some are written by ourselves, but more are from the upstream dependencies, even the underlying Linux. …

Software as a Service (SaaS) is one of the three most widely existing cloud service patterns, gradually dislodging traditional software from the market. SaaS’s pay-as-you-go business model is straightforward, adaptable, and cost-effective, which attracts more and more users. However, more issues occur as SaaS grows. One incident back in December…

Walkthrough tools & configs & knowledge used in Kubernetes cronjob/deployment debug — With Kubernetes being the de facto standard for deploying applications, using CLI to deploy and debug has definitely become a must-have for developers, though it used to be a DevOps skill. The troubleshooting tasks in the Certified Kubernetes Administrator (CKA) I passed earlier this year had suggested what skills remained…