Public-health cluster nodes need bridged IPv4 traffic sysctl settings before CNI networking works reliably. Which preparation is appropriate?
Select an answer to reveal the explanation.
Short Explanation
Pod networking needs the node’s bridge and forward knobs switched on—like opening the water main before the sprinkler heads work. Load the usual modules and sysctls so CNI packets get iptables treatment. Turning forwarding off fights the CNI.
Full Explanation
Kubernetes networking prerequisites commonly include loading modules such as br_netfilter and enabling sysctls like net.bridge.bridge-nf-call-iptables and net.ipv4.ip_forward so bridged Pod traffic is processed correctly. Disabling forwarding or unloading those modules breaks typical CNI behavior. Forcing hostNetwork on static Pods is not a substitute for preparing worker networking.