feat: use 127.0.0.1 as IPv4 if there's no external IPv4 addr

Since commit 0bc0d3b ("feat: add vsock network type support (dragonflyoss#1303)") we have vsock support, which means we could run dfget in a constrained VM env that only has loopback net interface, and connect to dfdaemon on host via vsock connection. So it's a valid setup to have no external IPv4 addr. Don't panic in this case and use "127.0.0.1" as IPv4. Signed-off-by: Eryu Guan <[email protected]>
eryugey · May 31, 2022 · 8c85455 · 8c85455
1 parent a12ef5f
commit 8c85455
Showing 1 changed file with 8 additions and 3 deletions.
diff --git a/pkg/util/net/iputils/ip_utils.go b/pkg/util/net/iputils/ip_utils.go
@@ -22,17 +22,22 @@ import (
 	"sort"
 
 	"github.com/pkg/errors"
+	logger "d7y.io/dragonfly/v2/internal/dflog"
 )
 
 var IPv4 string
 
+const internalIPv4 string = "127.0.0.1"
+
 func init() {
 	ip, err := externalIPv4()
 	if err != nil {
-		panic(err)
+		logger.Warnf("Failed to get IPv4 address: %s", err.Error())
+		logger.Infof("Use %s as IPv4 addr", internalIPv4)
+		IPv4 = internalIPv4
+	} else {
+		IPv4 = ip
 	}
-
-	IPv4 = ip
 }
 
 // IsIPv4 returns whether the ip is a valid IPv4 Address.