Add MachinePhase type and helper functions

Signed-off-by: Vince Prignano <vincepri@vmware.com>

config/crds/cluster.sigs.k8s.io_machines.yaml

@@ -590,9 +590,9 @@ spec:
                 - address
                 type: object
               type: array
-            bootstrap:
+            bootstrapReady:
               description: Bootstrap is the state of the bootstrap provider.
-              type: string
+              type: boolean
             conditions:
               description: 'Conditions lists the conditions synced from the node conditions
                 of the corresponding node-object. Machine-controller is responsible
@@ -658,9 +658,10 @@ spec:
                 can be added as events to the Machine object and/or logged in the
                 controller's output."
               type: string
-            infrastructure:
-              description: Infrastructure is the state of the infrastructure provider.
-              type: string
+            infrastructureReady:
+              description: InfrastructureReady is the state of the infrastructure
+                provider.
+              type: boolean
             lastUpdated:
               description: LastUpdated identifies when this status was last observed.
               format: date-time
@@ -711,6 +712,9 @@ spec:
                 up status from the Node to the Machine. It is entirely optional, but
                 useful for end-user UX if it’s present.
               type: string
+          required:
+          - bootstrapReady
+          - infrastructureReady
           type: object
       type: object
   versions:

pkg/apis/cluster/v1alpha2/BUILD.bazel

@@ -7,6 +7,7 @@ go_library(
         "common_type.go",
         "defaults.go",
         "doc.go",
+        "machine_phase_types.go",
         "machine_types.go",
         "machinedeployment_types.go",
         "machineset_types.go",

pkg/apis/cluster/v1alpha2/machine_phase_types.go

@@ -0,0 +1,61 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha2
+
+// MachinePhase
+type MachinePhase string
+
+var (
+	// MachinePhasePending is the first state a Machine is assigned by
+	// Cluster API Machine controller after being created.
+	MachinePhasePending = MachinePhase("pending")
+
+	// MachinePhaseProvisioning is the state when the
+	// Machine infrastructure is being created.
+	MachinePhaseProvisioning = MachinePhase("provisioning")
+
+	// MachinePhaseProvisioned is the state when its
+	// infrastructure has been created and configured.
+	MachinePhaseProvisioned = MachinePhase("provisioned")
+
+	// MachinePhaseRunning is the Machine state when it has
+	// become a Kubernetes Node in a Ready state.
+	MachinePhaseRunning = MachinePhase("running")
+
+	// MachinePhaseDeleting is the Machine state when a delete
+	// request has been sent to the API Server,
+	// but its infrastructure has not yet been fully deleted.
+	MachinePhaseDeleting = MachinePhase("deleting")
+
+	// MachinePhaseDeleted is the Machine state when the object
+	// and the related infrastructure is deleted and
+	// ready to be garbage collected by the API Server.
+	MachinePhaseDeleted = MachinePhase("deleted")
+
+	// MachinePhaseFailed is the Machine state when the system
+	// might require user intervention.
+	MachinePhaseFailed = MachinePhase("failed")
+
+	// MachinePhaseUnknown is returned if the Machine state cannot be determined.
+	MachinePhaseUnknown = MachinePhase("")
+)
+
+// MachinePhaseStringPtr is a helper method to convert MachinePhase to a string pointer.
+func MachinePhaseStringPtr(p MachinePhase) *string {
+	s := string(p)
+	return &s
+}

pkg/apis/cluster/v1alpha2/machine_types.go

@@ -163,11 +163,38 @@ type MachineStatus struct {
 	// +optional
 	Phase *string `json:"phase,omitempty"`
 
-	// Bootstrap is the state of the bootstrap provider.
-	Bootstrap *string `json:"bootstrap,omitempty"`
+	// BootstrapReady is the state of the bootstrap provider.
+	BootstrapReady bool `json:"bootstrapReady"`
 
-	// Infrastructure is the state of the infrastructure provider.
-	Infrastructure *string `json:"infrastructure,omitempty"`
+	// InfrastructureReady is the state of the infrastructure provider.
+	InfrastructureReady bool `json:"infrastructureReady"`
+}
+
+// SetTypedPhase sets the Phase field to the string representation of MachinePhase.
+func (m *MachineStatus) SetTypedPhase(p MachinePhase) {
+	m.Phase = MachinePhaseStringPtr(p)
+}
+
+// GetTypedPhase attempts to parse the Phase field and return
+// the typed MachinePhase representation as described in `machine_phase_types.go`.
+func (m *MachineStatus) GetTypedPhase() MachinePhase {
+	if m.Phase == nil {
+		return MachinePhaseUnknown
+	}
+
+	switch phase := MachinePhase(*m.Phase); phase {
+	case
+		MachinePhasePending,
+		MachinePhaseProvisioning,
+		MachinePhaseProvisioned,
+		MachinePhaseRunning,
+		MachinePhaseDeleting,
+		MachinePhaseDeleted,
+		MachinePhaseFailed:
+		return phase
+	default:
+		return MachinePhaseUnknown
+	}
 }
 
 // Bootstrap capsulates fields to configure the Machine’s bootstrapping mechanism.