network: Fix Could not create destination mount point: /etc/resolv.conf

agent does not check if /etc/resolv.conf exists, if it does not exist, setDns will fail and causes the container to fail to run. sometimes,we don't need dns in guest vm, so it's better to skip and return nil if /etc/resolv.conf does not exists. Fixes: #829 Signed-off-by: Shukui Yang <[email protected]>
kata-containers · Aug 31, 2020 · a48a062 · a48a062
1 parent 2b839fe
commit a48a062
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/network.go b/network.go
@@ -693,6 +693,11 @@ func setupDNS(dns []string) (err error) {
 		return nil
 	}
 
+	if _, err := os.Stat(guestDNSFile); err != nil && os.IsNotExist(err) {
+		agentLog.Errorf("%s is not exist in guest, dns service may be unavailable", guestDNSFile)
+		return nil
+	}
+
 	if err := os.MkdirAll(filepath.Dir(kataGuestSandboxDNSFile), 0700); err != nil {
 		return err
 	}