Enable Hotadd support for windows

drivers/windows/windows.go

@@ -62,10 +62,17 @@ type EndpointConnectivity struct {
 }
 
 type hnsEndpoint struct {
-	id             string
-	nid            string
-	profileID      string
-	Type           string
+	id        string
+	nid       string
+	profileID string
+	Type      string
+	//Note: Currently, the sandboxID is the same as the containerID since windows does
+	//not expose the sandboxID.
+	//In the future, windows will support a proper sandboxID that is different
+	//than the containerID.
+	//Therefore, we are using sandboxID now, so that we won't have to change this code
+	//when windows properly supports a sandboxID.
+	sandboxID      string
 	macAddress     net.HardwareAddr
 	epOption       *endpointOption       // User specified parameters
 	epConnectivity *EndpointConnectivity // User specified parameters
@@ -730,7 +737,15 @@ func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo,
 		return err
 	}
 
-	// This is just a stub for now
+	endpoint.sandboxID = sboxKey
+
+	err = hcsshim.HotAttachEndpoint(endpoint.sandboxID, endpoint.profileID)
+	if err != nil {
+		// If container doesn't exists in hcs, do not throw error for hot add/remove
+		if err != hcsshim.ErrComputeSystemDoesNotExist {
+			return err
+		}
+	}
 
 	jinfo.DisableGatewayService()
 	return nil
@@ -744,13 +759,18 @@ func (d *driver) Leave(nid, eid string) error {
 	}
 
 	// Ensure that the endpoint exists
-	_, err = network.getEndpoint(eid)
+	endpoint, err := network.getEndpoint(eid)
 	if err != nil {
 		return err
 	}
 
-	// This is just a stub for now
-
+	err = hcsshim.HotDetachEndpoint(endpoint.sandboxID, endpoint.profileID)
+	if err != nil {
+		// If container doesn't exists in hcs, do not throw error for hot add/remove
+		if err != hcsshim.ErrComputeSystemDoesNotExist {
+			return err
+		}
+	}
 	return nil
 }
 

osl/namespace_windows.go

@@ -5,12 +5,7 @@ import "testing"
 // GenerateKey generates a sandbox key based on the passed
 // container id.
 func GenerateKey(containerID string) string {
-	maxLen := 12
-	if len(containerID) < maxLen {
-		maxLen = len(containerID)
-	}
-
-	return containerID[:maxLen]
+	return containerID
 }
 
 // NewSandbox provides a new sandbox instance created in an os specific way