network: ensure parent directories exist

make sure the parent directory exists when opening the resolv.conf file. fixes: #669 Signed-off-by: Giuseppe Scrivano <[email protected]>
kata-containers · Oct 17, 2019 · 7a7dba7 · 7a7dba7
1 parent b90fe28
commit 7a7dba7
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/network.go b/network.go
@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"net"
 	"os"
+	"path/filepath"
 	"reflect"
 	"strings"
 	"sync"
@@ -619,6 +620,10 @@ func setupDNS(dns []string) (err error) {
 		agentLog.Debug("Did not set sandbox DNS as DNS not received as part of grpc request.")
 		return nil
 	}
+
+	if err := os.MkdirAll(filepath.Dir(kataGuestSandboxDNSFile), 0700); err != nil {
+		return err
+	}
 	if file, err = os.Create(kataGuestSandboxDNSFile); err != nil {
 		return err
 	}