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[23.0 backport] libnetwork: check DNS loopback with user DNS opts #45000

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merged 1 commit into from Feb 14, 2023
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[23.0 backport] libnetwork: check DNS loopback with user DNS opts #45000

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2 changes: 1 addition & 1 deletion libnetwork/sandbox_dns_unix.go
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Expand Up @@ -263,7 +263,7 @@ func (sb *sandbox) setupDNS() error {
// After building the resolv.conf from the user config save the
// external resolvers in the sandbox. Note that --dns 127.0.0.x
// config refers to the loopback in the container namespace
sb.setExternalResolvers(newRC.Content, resolvconf.IPv4, false)
sb.setExternalResolvers(newRC.Content, resolvconf.IPv4, len(sb.config.dnsList) == 0)
} else {
// If the host resolv.conf file has 127.0.0.x container should
// use the host resolver for queries. This is supported by the
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