Handle connection failures on resolution failure about snmp_exporter HOT 2 CLOSED

Posting for historical purposes:

SNMP uses GoSNMP. GoSNMP uses net package. Net package has a dnsclient library.
That dns client library does iterate through all the nameservers and sets the context deadline to the current context timeout.
https://go.dev/src/net/dnsclient_unix.go#L179

This confirms what I needed to know. I didn't think that SNMP exporter was correctly attempting to connect to each DNS server, but it does.

from snmp_exporter.

This isn't really a question for the snmp_exporter. Go provides functions like errors.Is() to test error return codes from function calls. You can check the error response and retry (or not) depending on the error returned.

If you need more reliable DNS, I recommend using a local caching proxy.

from snmp_exporter.