[Fix] Reuse registry in multicluster (fixes #485,@kuritka) (#486, @kuritka)

pkg/runtimes/docker/network.go

@@ -131,6 +131,12 @@ func GetGatewayIP(ctx context.Context, network string) (net.IP, error) {
 
 // ConnectNodeToNetwork connects a node to a network
 func (d Docker) ConnectNodeToNetwork(ctx context.Context, node *k3d.Node, networkName string) error {
+	// check that node was not attached to network before
+	if isAttachedToNetwork(node, networkName) {
+		log.Infof("Container '%s' is already connected to '%s'", node.Name,networkName)
+		return nil
+	}
+
 	// get container
 	container, err := getNodeContainer(ctx, node)
 	if err != nil {

pkg/runtimes/docker/util.go

@@ -140,6 +140,7 @@ func (d Docker) WriteToNode(ctx context.Context, content []byte, dest string, no
 	return nil
 }
 
+
 // GetDockerClient returns a docker client
 func GetDockerClient() (*client.Client, error) {
 	var err error
@@ -168,3 +169,13 @@ func GetDockerClient() (*client.Client, error) {
 
 	return cli, err
 }
+
+// isAttachedToNetwork return true if node is attached to network
+func isAttachedToNetwork(node *k3d.Node, network string) bool {
+	for _, nw := range node.Networks {
+		if nw == network {
+			return true
+		}
+	}
+	return false
+}