add the infrastructure types

test/e2e/pkg/infrastructure.go

@@ -0,0 +1,20 @@
+package e2e
+
+import "net"
+
+// InfrastructureData contains the relevant information for a set of existing
+// infrastructure that is to be used for running a testnet.
+type InfrastructureData struct {
+
+	// Instances is a map of all of the machine instances on which to run
+	// processes for a testnet.
+	// The key of the map is the name of the instance, which each must correspond
+	// to the names of one of the testnet nodes defined in the testnet manifest.
+	Instances map[string]InstanceData `json:"instances"`
+}
+
+// InstanceData contains the relevant information for a machine instance backing
+// one of the nodes in the testnet.
+type InstanceData struct {
+	IPAddress net.IP `json:"ip_address"`
+}