Answer
Embedded DNS scales poorly with many services, causing latency without caching layers.
Quick Answer
Docker's embedded DNS runs as a goroutine in each container's network namespace, listening on 127.0.0.11. Under heavy load with thousands of containers, DNS query queuing and resolution latency increase. Service discovery via DNS works fine up to moderate scale; above that, service meshes or dedicated DNS servers perform better.
S
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