Commits on Feb 14, 2023

1. libnetwork: check DNS loopback with user DNS opts …

   DNS servers in the loopback address range should always be resolved in
   the host network namespace when the servers are configured by reading
   from the host's /etc/resolv.conf. The daemon mistakenly conflated the
   presence of DNS options (docker run --dns-opt) with user-supplied DNS
   servers, treating the list of servers loaded from the host as a user-
   supplied list and attempting to resolve in the container's network
   namespace. Correct this oversight so that loopback DNS servers are only
   resolved in the container's network namespace when the user provides the
   DNS server list, irrespective of other DNS configuration.
   
   Signed-off-by: Cory Snider <csnider@mirantis.com>
   (cherry picked from commit 046cc9e)
   Signed-off-by: Cory Snider <csnider@mirantis.com>

   

   corhere committed Feb 14, 2023
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