Merge pull request #229 from jmcarp/issue-214-volume-size

Configure node volume size and encryption.

README.md

@@ -142,6 +142,12 @@ apply to CloudFormation stacks but not EKS clusters.
 eksctl create cluster --tags environment=staging --region=us-east-1
 ```
 
+To configure node volume size, use the `--node-volume-size` flag.
+
+```
+eksctl create cluster --node-volume-size=50
+```
+
 > NOTE: In `us-east-1` you are likely to get `UnsupportedAvailabilityZoneException`. If you do, copy the suggested zones and pass `--zones` flag, e.g. `eksctl create cluster --region=us-east-1 --zones=us-east-1a,us-east-1b,us-east-1d`. This may occur in other regions, but less likely. You shouldn't need to use `--zone` flag otherwise.
 
 To delete a cluster, run:

cmd/eksctl/create.go

@@ -75,6 +75,7 @@ func createClusterCmd() *cobra.Command {
 	fs.IntVarP(&cfg.MinNodes, "nodes-min", "m", 0, "minimum nodes in ASG")
 	fs.IntVarP(&cfg.MaxNodes, "nodes-max", "M", 0, "maximum nodes in ASG")
 
+	fs.IntVarP(&cfg.NodeVolumeSize, "node-volume-size", "", 0, "Node volume size (in GB)")
 	fs.IntVar(&cfg.MaxPodsPerNode, "max-pods-per-node", 0, "maximum number of pods per node (set automatically if unspecified)")
 	fs.StringSliceVar(&availabilityZones, "zones", nil, "(auto-select if unspecified)")
 

pkg/cfn/builder/nodegroup.go

@@ -89,6 +89,16 @@ func (n *nodeGroupResourceSet) addResourcesForNodeGroup() {
 	if n.spec.NodeSSH {
 		lc.KeyName = gfn.NewString(n.spec.SSHPublicKeyName)
 	}
+	if n.spec.NodeVolumeSize > 0 {
+		lc.BlockDeviceMappings = []gfn.AWSAutoScalingLaunchConfiguration_BlockDeviceMapping{
+			{
+				DeviceName: gfn.NewString("/dev/xvda"),
+				Ebs: &gfn.AWSAutoScalingLaunchConfiguration_BlockDevice{
+					VolumeSize: gfn.NewInteger(n.spec.NodeVolumeSize),
+				},
+			},
+		}
+	}
 	refLC := n.newResource("NodeLaunchConfig", lc)
 	// currently goformation type system doesn't allow specifying `VPCZoneIdentifier: { "Fn::ImportValue": ... }`,
 	// and tags don't have `PropagateAtLaunch` field, so we have a custom method here until this gets resolved

pkg/eks/api/api.go

@@ -40,6 +40,8 @@ type ClusterConfig struct {
 	MinNodes int
 	MaxNodes int
 
+	NodeVolumeSize int
+
 	MaxPodsPerNode int
 
 	NodePolicyARNs []string