feat: add --dns and --dns-search flags to customize the vm dns configuration

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

cmd/d2vm/build.go

@@ -111,6 +111,8 @@ var (
 				d2vm.WithPlatform(platform),
 				d2vm.WithPull(false),
 				d2vm.WithHostname(hostname),
+				d2vm.WithDNS(dns),
+				d2vm.WithDNSSearch(dnsSearch),
 			); err != nil {
 				return err
 			}

cmd/d2vm/convert.go

@@ -92,6 +92,8 @@ var (
 				d2vm.WithPlatform(platform),
 				d2vm.WithPull(pull),
 				d2vm.WithHostname(hostname),
+				d2vm.WithDNS(dns),
+				d2vm.WithDNSSearch(dnsSearch),
 			); err != nil {
 				return err
 			}

cmd/d2vm/flags.go

@@ -45,7 +45,9 @@ var (
 	keepCache bool
 	platform  string
 
-	hostname string
+	hostname  string
+	dns       []string
+	dnsSearch []string
 )
 
 func validateFlags() error {
@@ -119,5 +121,7 @@ func buildFlags() *pflag.FlagSet {
 	flags.StringVar(&platform, "platform", d2vm.Arch, "Platform to use for the container disk image, linux/arm64 and linux/arm64 are supported")
 	flags.BoolVar(&pull, "pull", false, "Always pull docker image")
 	flags.StringVar(&hostname, "hostname", "localhost", "Hostname to set in the generated image")
+	flags.StringSliceVar(&dns, "dns", []string{}, "DNS servers to set in the generated image")
+	flags.StringSliceVar(&dnsSearch, "dns-search", []string{}, "DNS search domains to set in the generated image")
 	return flags
 }