Merge pull request #5717 from philips/mkdir-in-daemon

fix(daemon): ensure the /var/lib/docker dir exists
Upstream-commit: bc77ec2b17b6822a5a930cc34ae0d8a32bffc253
Component: engine

components/engine/daemon/daemon.go

@@ -680,6 +680,12 @@ func NewDaemonFromDirectory(config *daemonconfig.Config, eng *engine.Engine) (*D
 	if !config.EnableSelinuxSupport {
 		selinux.SetDisabled()
 	}
+
+	// Create the root directory if it doesn't exists
+	if err := os.MkdirAll(config.Root, 0700); err != nil && !os.IsExist(err) {
+		return nil, err
+	}
+
 	// Set the default driver
 	graphdriver.DefaultDriver = config.GraphDriver