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SKSonal Kumardevopswork.hashnode.devMay 30 · 2 min read

Network Policy Assignment

Following is an assignment of creating a network policy from the following instructions. Instructions : The assignment requires you to create a YAML file for a network policy in Kubernetes that meets

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MBMatt Browncloudsecburrito.comMar 16 · 11 min read

Kafka is often treated as background infrastructure. It quietly moves events between services like payments, analytics, notifications, etc. So it easy to view it as internal plumbing. But Kafka is not

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MBMatt Browncloudsecburrito.comOct 7, 2025 · 15 min read

Service Boundaries: The Cilium Way

In Part 2 we leveled up from basic NetworkPolicy to better cluster-wide guardrails using Calico. With global defaults and flow logs, we built something that worked. That’s a solid foundation. Sounds a bit like what I thought of Network Policies befor...

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NBNusrat Bhuiyannusratdops.hashnode.devSep 22, 2025 · 7 min read

Kubernetes Networking & Services—Essential CKA Practice Guide

CKA Practice Notes – Networking & Services Second part of my Certified Kubernetes Administrator (CKA) preparation series.In the first part, I covered Workloads & Scheduling.This post focuses on Networking & Services, an essential skill set for anyon...

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MBMatt Browncloudsecburrito.comSep 3, 2025 · 16 min read

Service Boundaries: Scaling with Calico

In Part 1 we took Kubernetes from “wide open by default” to a clean three-hop app chain. With a handful of NetworkPolicy manifests we locked the cluster down to just the flows the app actually needs: frontend → backend → database, plus DNS. Everythin...

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MAMuskan Agrawalmuskanagrawal.hashnode.devAug 31, 2025 · 3 min read

Debugging Kubernetes Networking: Why can’t my service be reached

It started with a simple deployment. The app was up, pods were running, but the service just wouldn’t respond. Requests vanished into thin air and users saw... nothing. This wasn’t the first time, so I rolled up my sleeves for some hands-on Kubernete...

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MBMatt Browncloudsecburrito.comAug 27, 2025 · 13 min read

Service Boundaries: Kubernetes NetworkPolicy Basics

By default, Kubernetes is wide open. Of course you knew that already. Any pod can talk to any other pod, in any namespace, on any port. That makes life easy for anyone putting an app into prod, and just as easy for anyone who compromises one workload...

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CLCheedge Leenotes-renovation.hashnode.devJan 10, 2025 · 2 min read

Typo caused difference in NetworkPolicy yaml file

Check following two networkpolicy yaml file, np1.yaml and np2.yaml: # np1.yaml apiVersion: networking.k8s.io/v1 kind: NetworkPolicy metadata: name: np namespace: space1 spec: podSelector: {} policyTypes: - Egress egress: - to: - nam...

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CLCheedge Leenotes-renovation.hashnode.devJan 10, 2025 · 2 min read

CKA Quick Check Points -- Network

Quick recap for network. Details can click the title link or check the official doc. SVC 1. create # target port: listening port inside container # port: service internal port # NodePort: expose external port kubectl expose deployment nginx --name n...

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CLCheedge Leenotes-renovation.hashnode.devJan 3, 2025 · 3 min read

CKA Recap -- Ingress & NetworkPolicy

Ingress ingress to make external to access: domain_name:port/path Field: rules.ingressClassName path -> path backend.service.name -> service port -> service port host -> domain name apiVersion: networking.k8s.io/v1 kind: Ingress metadata: ...

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#networkpolicy

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#networkpolicy

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Trending tags this week

Network Policy Assignment

Kafka on Kubernetes

Service Boundaries: The Cilium Way

Kubernetes Networking & Services—Essential CKA Practice Guide

Service Boundaries: Scaling with Calico

Debugging Kubernetes Networking: Why can’t my service be reached

Service Boundaries: Kubernetes NetworkPolicy Basics

Typo caused difference in NetworkPolicy yaml file

CKA Quick Check Points -- Network

CKA Recap -- Ingress & NetworkPolicy