- Openshift 3.X uses local dnsmasq service running on the node to resolve all internal (skydns) and external dns queries.
- Openshift 4.X uses dns svc address as the dns server in /etc/resolv.conf of the pods and that could use any random servers (CoreDNS endpoints) over the network. Some customers reported that network latency is costlier and that causes huge performance issues.
- Openshift 4.X
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