add swift v2 config based on node label (#2144)

* add swift v2 config based on node label

Signed-off-by: Evan Baker <rbtr@users.noreply.github.com>

* add tentative swiftv2 label

Signed-off-by: Evan Baker <rbtr@users.noreply.github.com>

---------

Signed-off-by: Evan Baker <rbtr@users.noreply.github.com>

cns/configuration/configuration.go

@@ -23,6 +23,7 @@ type CNSConfig struct {
 	ChannelMode                 string
 	EnablePprof                 bool
 	EnableSubnetScarcity        bool
+	EnableSwiftV2               bool
 	InitializeFromCNI           bool
 	ManagedSettings             ManagedSettings
 	MetricsBindAddress          string

cns/configuration/env.go

@@ -11,6 +11,8 @@ const (
 	EnvNodeName = "NODENAME"
 	// EnvNodeIP is the IP of the node running this CNS binary
 	EnvNodeIP = "NODE_IP"
+	// LabelSwiftV2 is the Node label for Swift V2
+	LabelSwiftV2 = "kubernetes.azure.com/podnetwork-multi-tenancy"
 )
 
 // ErrNodeNameUnset indicates the the $EnvNodeName variable is unset in the environment.

cns/service/main.go

@@ -1235,6 +1235,12 @@ func InitializeCRDState(ctx context.Context, httpRestService cns.HTTPService, cn
 		return errors.Wrapf(err, "failed to get node %s", nodeName)
 	}
 
+	// check the Node labels for Swift V2
+	if _, ok := node.Labels[configuration.LabelSwiftV2]; ok {
+		cnsconfig.EnableSwiftV2 = true
+		// TODO(rbtr): create the NodeInfo for Swift V2
+	}
+
 	// get CNS Node IP to compare NC Node IP with this Node IP to ensure NCs were created for this node
 	nodeIP := configuration.NodeIP()