Regarding DNS query resolution

[Gaurav0411GitHub]

We are using envoy 1.29.1, We have observed that DNS resolution in Envoy is working correctly when the order of queries is CNAME first, followed by an A record query. However, on the other hand, if the order appears to be reversed, with the A query preceding the CNAME. we are not getting dns server address.

We are getting below logs [2023-11-06 10:49:05.345][73544][debug][forward_proxy] [source/extensions/common/dynamic_forward_proxy/dns_cache_impl.cc:260] host='abcd-efg.xyz.top:80' TTL check: now=12341891452624 last_used=12341862726512 TTL 300000 [2023-11-06 10:49:05.345][73544][debug][forward_proxy] [source/extensions/common/dynamic_forward_proxy/dns_cache_impl.cc:309] starting main thread resolve for host='abcd-efg.xyz.top:80' dns='abcd-efg.xyz.top' port='80' timeout='5000' [2023-11-06 10:49:05.345][73544][debug][dns] [source/extensions/network/dns_resolver/cares/dns_impl.cc:365] dns resolution for abcd-efg.xyz.top started [2023-11-06 10:49:05.352][73544][debug][dns] [source/extensions/network/dns_resolver/cares/dns_impl.cc:154] dns resolution without records for abcd-efg.xyz.top [2023-11-06 10:49:05.352][73544][debug][dns] [source/extensions/network/dns_resolver/cares/dns_impl.cc:283] dns resolution for abcd-efg.xyz.top completed with status 0 [2023-11-06 10:49:05.352][73544][debug][forward_proxy] [source/extensions/common/dynamic_forward_proxy/dns_cache_impl.cc:330] main thread resolve complete for host 'abcd-efg.xyz.top:80': [] [2023-11-06 10:49:05.352][73544][debug][forward_proxy] [source/extensions/common/dynamic_forward_proxy/dns_cache_impl.cc:434] DNS refresh rate reset for host 'abcd-efg.xyz.top:80', refresh rate 60000 ms

Could you please let us know how can we resolve this issue?

[Gaurav0411GitHub]

@timperrett , @pjjw @mkbehr @eclesh Thanks in advance for your reply

[Gaurav0411GitHub]

@KBaichoo Thanks in advance for your reply. Could you please confirm, This scenario is handled in which version of envoy or how it can be solved?