incus/network: use the ovn router address as dns server for dhcp in isolated (network=none) ovn networks

gwenya · gwenya · commit df33a11ed30d · 2025-03-09T15:04:13.000+01:00
diff --git a/internal/server/network/driver_ovn.go b/internal/server/network/driver_ovn.go
@@ -2660,6 +2660,8 @@ func (n *ovn) setup(update bool) error {
 
 		if uplinkNet != nil {
 			opts.RecursiveDNSServer = uplinkNet.dnsIPv4
+		} else {
+			opts.RecursiveDNSServer = []net.IP{routerIntPortIPv4}
 		}
 
 		err = n.ovnnb.UpdateLogicalSwitchDHCPv4Options(context.TODO(), n.getIntSwitchName(), dhcpv4UUID, dhcpV4Subnet, opts)
@@ -2677,6 +2679,8 @@ func (n *ovn) setup(update bool) error {
 
 		if uplinkNet != nil {
 			opts.RecursiveDNSServer = uplinkNet.dnsIPv6
+		} else {
+			opts.RecursiveDNSServer = []net.IP{routerIntPortIPv6}
 		}
 
 		err = n.ovnnb.UpdateLogicalSwitchDHCPv6Options(context.TODO(), n.getIntSwitchName(), dhcpv6UUID, dhcpV6Subnet, opts)

Original file line number	Diff line number	Diff line change
`@@ -2660,6 +2660,8 @@ func (n *ovn) setup(update bool) error {`
`2660`	`2660`
`2661`	`2661`	`if uplinkNet != nil {`
`2662`	`2662`	`opts.RecursiveDNSServer = uplinkNet.dnsIPv4`
	`2663`	`+ } else {`
	`2664`	`+ opts.RecursiveDNSServer = []net.IP{routerIntPortIPv4}`
`2663`	`2665`	`}`
`2664`	`2666`
`2665`	`2667`	`err = n.ovnnb.UpdateLogicalSwitchDHCPv4Options(context.TODO(), n.getIntSwitchName(), dhcpv4UUID, dhcpV4Subnet, opts)`
`@@ -2677,6 +2679,8 @@ func (n *ovn) setup(update bool) error {`
`2677`	`2679`
`2678`	`2680`	`if uplinkNet != nil {`
`2679`	`2681`	`opts.RecursiveDNSServer = uplinkNet.dnsIPv6`
	`2682`	`+ } else {`
	`2683`	`+ opts.RecursiveDNSServer = []net.IP{routerIntPortIPv6}`
`2680`	`2684`	`}`
`2681`	`2685`
`2682`	`2686`	`err = n.ovnnb.UpdateLogicalSwitchDHCPv6Options(context.TODO(), n.getIntSwitchName(), dhcpv6UUID, dhcpV6Subnet, opts)`