docs: note Google DNS fallback when host has no public resolvers - #25793
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locker95 wants to merge 2 commits into
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docs: note Google DNS fallback when host has no public resolvers#25793locker95 wants to merge 2 commits into
locker95 wants to merge 2 commits into
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Document that dockerd falls back to 8.8.8.8/8.8.4.4 when resolv.conf has only localhost nameservers, and that air-gapped hosts should set --dns or daemon dns instead. Fixes docker#22945 Signed-off-by: Dean Chen <862469039@qq.com>
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Signed-off-by: Dean Chen <862469039@qq.com>
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If the host only has localhost nameservers in
resolv.conf, the engine falls back to Google Public DNS (8.8.8.8/8.8.4.4) and logs that in the daemon. That's easy to miss on air-gapped machines where lookups then hang on unreachable public resolvers.Documented the behavior and pointed at
--dns/ daemondnsas the override.Fixes #22945