Feb 9
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DNS in Kubernetes Explained: CoreDNS, Service Discovery & Troubleshooting (Live) In this live session, we take a deep, practical dive into DNS in Kubernetes, focusing on how CoreDNS works internally, how Pods and Services discover each other, and how to troubleshoot real DNS issues in Kubernetes clusters. We break down DNS resolution step-by-step—from a Pod making a DNS query to CoreDNS resolving Services, Headless Services, and EndpointSlices. You will see real command-line demos, architecture diagrams, and common failure scenarios that occur in production environments and CKA/CKAD exams. This session is ideal for anyone who wants to truly understand Kubernetes DNS, not just use it. 🔍 Topics Covered ✔ Why DNS is critical in Kubernetes ✔ CoreDNS architecture & components ✔ kube-dns Service and CoreDNS Pods ✔ Service DNS resolution (ClusterIP) ✔ Headless Services & Pod-level DNS ✔ EndpointSlice and DNS behavior ✔ DNS naming conventions in Kubernetes ✔ DNS resolution flow (Pod → CoreDNS → Service/Pods) ✔ Common DNS failures and troubleshooting techniques 🧪 Hands-On Demonstrations Testing DNS using nslookup and dig Resolving Services and Headless Services Inspecting CoreDNS Pods and logs Debugging DNS failures in real clusters Understanding DNS responses for Services vs Pods 🎯 Who Should Watch? Kubernetes beginners learning core networking concepts DevOps engineers working with Kubernetes clusters CKA / CKAD exam aspirants Anyone facing DNS or service discovery issues in Kubernetes 🛠 Tools Used Kubernetes (kubeadm-based cluster) CoreDNS netshoot / debugging pods kubectl, nslookup, dig 📌 Prerequisites Basic understanding of: Kubernetes Pods and Services Linux networking basics 📢 What’s Next? Upcoming sessions will cover: Kubernetes Services in depth Ingress Controllers (NGINX & Traefik) Network Policies & Kubernetes security 👍 If you found this session helpful, don’t forget to like, share, and subscribe 💬 Drop your questions in the comments — happy to help! *** 📚 Nehra Classes - Igniting The Minds! 📚 About Us: Nehra Classes is a premier IT training institute dedicated to empowering individuals with the skills and knowledge they need to succeed in today's competitive technology landscape. Founded by Vikas Nehra, a seasoned IT professional, our institute has been at the forefront of providing quality training solutions for over 10 years. *** 🕒 Video Chapters (Timestamps): *** 🔗 Important Links: Join Our YouTube Membership: https://www.youtube.com/channel/UCvk2Fst1h1a0StSnUcvGfBQ/join Visit Our Website: https://www.nehraclasses.in Visit Our Courses Portal: https://www.nehraclasses.com Access Our Learning Portal: https://web.nehraclasses.com/login?orgCode=ljeizx Download Our Nehra Classes App: https://clpted.page.link/5cJc Android App: https://play.google.com/store/apps/details?id=co.ted.thevn iOS App (OrgCode: ljeizx): https://apps.apple.com/in/app/classplus/id1324522260 Mail Us: nehraclasses@gmail.com *** For updates and offers follow us on Social Media: YouTube: https://www.youtube.com/@NehraClasses LinkedIn Page: https://www.linkedin.com/company/nehraclasses Telegram Channel: https://www.t.me/NehraClasses Telegram Discussion Group: https://www.t.me/NehraClassesChat WhatsApp Channel: https://whatsapp.com/channel/0029Va53a1SAYlUHpZltnY2z Facebook Page: https://www.facebook.com/nehraclasses Instagram: https://www.instagram.com/nehraclasses X Handle: https://www.x.com/nehraclasses Github Profile: https://www.github.com/nehraclasses Blog: https://nehraclassesyoutube.blogspot.com *** 📢 Stay Updated: Don’t forget to Subscribe and Hit the Bell Icon to stay notified about our latest videos, live sessions, and special offers. Like, Share, and Comment on our videos to let us know how we’re doing and what you’d like to see next! *** 🎓 Join the Nehra Classes Community: We’re more than just a channel; we’re a community of learners and educators. By joining our YouTube Membership and following us on social media, you gain access to exclusive content, live Q&A sessions, and a network of like-minded individuals. Let’s achieve your learning goals together! *** 🚀 Special Offers: Check out our current promotions, discounts, and free trials on our website and learning portal. Take advantage of these opportunities to start learning with us today! *** Thank you for being a part of Nehra Classes. Your success is our priority! *** Disclaimer: COPYRIGHT © Nehra Classes®. ALL RIGHTS RESERVED. All content, including but not limited to text, images, graphics, videos, course materials, and other digital assets available on Nehra Classes' platforms, is the exclusive property of Nehra Classes and is protected under international copyright laws. *** #KubernetesDNS #CoreDNS #KubernetesNetworking #DevOps #CloudNative