bridge:get dns config from /etc/cni/net.d default config, not from ipam plugins

[jamin-hon]

Referring to ducuments, bridge plugins does not contain dns config which ipam host-local and static plugins does.
But i found that bridge get dns config from /etc/cni/net.d original config, not from ipam plugins by reading and testing the source code.

[davdiv]

Indeed, I came across the same issue:

plugins/plugins/main/bridge/bridge.go

Line 568 in 48a97a7

result.DNS = n.DNS

The DNS in the result is copied from n, which is the bridge configuration (and nothing is mentioned in the following page regarding the possibility to pass a dns field: https://www.cni.dev/plugins/main/bridge/).
It should be copied from ipamResult.DNS, according to the documentation (https://www.cni.dev/plugins/ipam/host-local/). As a result, resolvConf in host-local configuration is mistakenly ignored when used with bridge.