CKA-2025-Important-Notes

 

 

 

 

 

 

 

 

Pass CKA 2025 |  UPDATED SYLLABUS  | S03-Control Plane Components

Pass CKA 2025 |  UPDATED SYLLABUS  | S02-Control Plane Components

Kubernetes 2025 [CKA]What You Were Never Taught

  Kubernetes 2025 : What you were Never Taught

  install the .deb package: cri-dockerd_0.3.9.3-0.ubuntu-focal_amd64.deb Enable and start: cri-docker.service cri-docker.socket Ensure CRI socket is available at: /var/run/cri-dockerd.sock ✅ Validation Both services are active (running) Socket file exists System is ready for: kubeadm init --cri-socket unix:///var/run/cri-dockerd.sock

  Make the system ready for CNI plugin installation by configuring the following sysctl parameters:" net.bridge.bridge-nf-call-iptables = 1 net.ipv6.conf.all.forwarding = 1 net.ipv4.ip_forward = 1 ✅ These ensure the Linux kernel can: Forward traffic between pods and nodes (IPv4 and IPv6) Apply iptables rules to bridged network traffic (used by most CNI plugins) 📦 These are must-have settings before installing any CNI like Calico, Flannel, Cilium, etc.