Don't error if resolv.conf does not exists

If the resolv.conf file is empty we provide default dns servers.
If the file does not exists we error and don't create the
container. We should also provide the default entries in this
case. This is also what docker does.

Fixes #8089

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/libpod/container_internal_linux.go b/libpod/container_internal_linux.go
index 2efe0d086..a1b4334fb 100644
--- a/libpod/container_internal_linux.go
+++ b/libpod/container_internal_linux.go
@@ -1412,7 +1412,8 @@ func (c *Container) generateResolvConf() (string, error) {
 
 	// Determine the endpoint for resolv.conf in case it is a symlink
 	resolvPath, err := filepath.EvalSymlinks(resolvConf)
-	if err != nil {
+	// resolv.conf doesn't have to exists
+	if err != nil && !os.IsNotExist(err) {
 		return "", err
 	}
 
@@ -1422,7 +1423,8 @@ func (c *Container) generateResolvConf() (string, error) {
 	}
 
 	contents, err := ioutil.ReadFile(resolvPath)
-	if err != nil {
+	// resolv.conf doesn't have to exists
+	if err != nil && !os.IsNotExist(err) {
 		return "", errors.Wrapf(err, "unable to read %s", resolvPath)
 	}