Certified Kubernetes Administrator (CKA) Exam

The Certified Kubernetes Administrator (CKA) exam is a hands-on session where you need to follow the instructions to configure the system in a bash terminal on the web browser. In my experience, some shortcut keys (such as Alt+F) do not work, which slows me down a little bit. For each question, you need to switch … Read moreCertified Kubernetes Administrator (CKA) Exam

IPVS, iptables and kube-proxy

This is an overview of the underlying technologies that drives load balancing. It covers LVS, Netfilter, iptables, IPVS and eventually kube-proxy. LVS (Linux Virtual Server) One of the ways to implement software load balancing is via LVS (Linux Virtual Server), as previously discussed. The diagram below shows the LVS framework, with IPVS as the fundamental … Read moreIPVS, iptables and kube-proxy

High Availability and Load Balancer

Overview Fault tolerance and high availability are two architectural characteristics that people often confuse with each other. High availability focuses on minimizing downtime. It guarantees uptime, but not performance in the event of component failures. Fault tolerance, on the other hand, focuses on stable capacity even in the event of component failures. Fault tolerance has … Read moreHigh Availability and Load Balancer