How do I select a resolver in nginx?

Question

cat /var/log/nginx/error.log

*644181 no resolver defined to resolve

website shows

502 Bad Gateway

I read these:

• What does the Resolver param in nginx do?

• 502 Bad Gateway - NGINX no resolver defined to resolve

• How to resolve Nginx "proxy_pass 502 Bad Gateway" error

• https://distinctplace.com/2017/04/19/nginx-resolver-explained/

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I've discovered that I need to set a resolver variable for nginx, but I still can't seem to figure out what it should be set to. Many answers seem to throw out a random IP without any explanation as to how they got that.

Any information on this subject would be appreciated.

Answer 1

By default, it seems to be 127.0.0.1 -> https://serverfault.com/a/973311/547377

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In docker it may be 127.0.0.11

Note: for docker, it's DNS resolver resides at 127.0.0.11, so...

found in the comment section here: https://serverfault.com/a/593003/547377

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127.0.0.1 worked for me