New global option interface_name in containers.conf

Add a new containers.conf attribute to define how to set interface name inside containers.

Signed-off-by: Vikas Goel <vikas.goel@gmail.com>

pkg/config/config.go

@@ -154,8 +154,8 @@ type ContainersConfig struct {
 	// Deprecated: Do not use this field directly use conf.FindInitBinary() instead.
 	InitPath string `toml:"init_path,omitempty"`
 
-	// InterfaceName tells container runtimes whether how to set interface names
-	// inside the container.
+	// InterfaceName tells container runtimes how to set interface names
+	// inside containers.
 	// The only valid value at the moment is "parent" that indicates the interface
 	// name should be set to the parent interface name of the respective bridge.
 	InterfaceName string `toml:"interface_name,omitempty"`

pkg/config/config_remote.go

@@ -20,6 +20,10 @@ func (c *ContainersConfig) validateDevices() error {
 	return nil
 }
 
+func (c *ContainersConfig) validateInterfaceName() error {
+	return nil
+}
+
 func (c *ContainersConfig) validateUlimits() error {
 	return nil
 }