Use cluster name as default subnet tag for Lyft CNI

docs/networking.md

@@ -545,7 +545,7 @@ You can specify which subnets to use for allocating Pod IPs by specifying
   networking:
     lyftvpc:
       subnetTags:
-        kubernetes_kubelet: true
+        KubernetesCluster: myclustername.mydns.io
 ```
 
 In this example, new interfaces will be attached to subnets tagged with `kubernetes_kubelet = true`.

docs/releases/1.18-NOTES.md

@@ -6,6 +6,8 @@
 
 * Terraform users on AWS may need to rename some resources in their state file in order to prepare for Terraform 0.12 support. See Required Actions below.
 
+* Lyft CNI plugin default subnet tags changed from from `Type: pod` to `KubernetesCluster: myclustername.mydns.io`. Subnets intended for use by the plugin will need to be tagged with this new tag and [additional tag filters](https://github.com/lyft/cni-ipvlan-vpc-k8s#other-configuration-flags) may need to be added to the cluster spec in order to achieve the desired set of subnets.
+
 * Support for Kubernetes versions prior to 1.9 has been removed.
 
 * Kubernetes 1.9 users will need to enable the PodPriority feature gate. See Required Actions below.

upup/models/nodeup/resources/_lyft_vpc_cni/files/etc/cni/net.d/10-cni-ipvlan-vpc-k8s.conflist.template

@@ -1,26 +1,26 @@
 {
+  "cniVersion": "0.3.1",
+  "name": "cni-ipvlan-vpc-k8s",
+  "plugins": [
+  {
     "cniVersion": "0.3.1",
-    "name": "cni-ipvlan-vpc-k8s",
-    "plugins": [
-	{
-	    "cniVersion": "0.3.1",
-	    "type": "cni-ipvlan-vpc-k8s-ipam",
-	    "interfaceIndex": 1,
-		"skipDeallocation" : true,
-	    "subnetTags":  {{ SubnetTags }},
-	    "secGroupIds": {{ NodeSecurityGroups }}
-	},
-	{
-	    "cniVersion": "0.3.1",
-	    "type": "cni-ipvlan-vpc-k8s-ipvlan",
-	    "mode": "l2"
-	},
-	{
-	    "cniVersion": "0.3.1",
-	    "type": "cni-ipvlan-vpc-k8s-unnumbered-ptp",
-	    "hostInterface": "eth0",
-	    "containerInterface": "veth0",
-	    "ipMasq": true
-	}
-    ]
-}
+    "type": "cni-ipvlan-vpc-k8s-ipam",
+    "interfaceIndex": 1,
+    "skipDeallocation": true,
+    "subnetTags":  {{ SubnetTags }},
+    "secGroupIds": {{ NodeSecurityGroups }}
+  },
+  {
+    "cniVersion": "0.3.1",
+    "type": "cni-ipvlan-vpc-k8s-ipvlan",
+    "mode": "l2"
+  },
+  {
+    "cniVersion": "0.3.1",
+    "type": "cni-ipvlan-vpc-k8s-unnumbered-ptp",
+    "hostInterface": "eth0",
+    "containerInterface": "veth0",
+    "ipMasq": true
+  }
+  ]
+}

upup/pkg/fi/nodeup/command.go

@@ -261,8 +261,15 @@ func (c *NodeUpCommand) Run(out io.Writer) error {
 	if c.cluster.Spec.Networking.LyftVPC != nil {
 
 		loader.TemplateFunctions["SubnetTags"] = func() (string, error) {
-			tags := map[string]string{
-				"Type": "pod",
+			var tags map[string]string
+			if c.cluster.IsKubernetesGTE("1.18") {
+				tags = map[string]string{
+					"KubernetesCluster": c.cluster.Name,
+				}
+			} else {
+				tags = map[string]string{
+					"Type": "pod",
+				}
 			}
 			if len(c.cluster.Spec.Networking.LyftVPC.SubnetTags) > 0 {
 				tags = c.cluster.Spec.Networking.LyftVPC.SubnetTags