Answer
CoreDNS caches, EndpointSlices reduce entries, and stable ClusterIP reduces re-resolution.
Quick Answer
Every DNS query from every Pod hits CoreDNS. In clusters with frequent Pod restarts, new Pods look up Service names and ExternalName records. Under heavy DNS load, CoreDNS becomes a bottleneck. NodeLocal DNSCache runs a DNS cache DaemonSet on each node — Pods hit the local cache first, dramatically reducing CoreDNS load and DNS query latency.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ