add channel to supervisor

Signed-off-by: Elliott Davis <elliott@excellent.io>

pkg/apis/habitat/v1beta1/types.go

@@ -118,6 +118,9 @@ type Service struct {
 	// Name is the name of the Habitat service that this Habitat object represents.
 	// This field is used to mount the user.toml file in the correct directory under /hab/user/ in the Pod.
 	Name string `json:"name"`
+	// Channel is the value of the --channel flag for the hab client.
+	// Optional. Defaults to `stable`.
+	Channel string `json:"channel"`
 }
 
 type ServiceV1beta2 struct {
@@ -140,6 +143,9 @@ type ServiceV1beta2 struct {
 	// Name is the name of the Habitat service that this Habitat object represents.
 	// This field is used to mount the user.toml file in the correct directory under /hab/user/ in the Pod.
 	Name string `json:"name"`
+	// Channel is the value of the --channel flag for the hab client.
+	// Optional. Defaults to `stable`.
+	Channel *string `json:"channel,omitempty"`
 }
 
 type Bind struct {

pkg/controller/v1beta1/controller.go

@@ -583,6 +583,13 @@ func (hc *HabitatController) newDeployment(h *habv1beta1.Habitat) (*appsv1beta1.
 			"--group", h.Spec.Service.Group)
 	}
 
+	if h.Spec.Service.Channel != "" {
+		// When a service is started without explicitly naming the group,
+		// it's assigned to the default group.
+		habArgs = append(habArgs,
+			"--channel", h.Spec.Service.Channel)
+	}
+
 	// As we want to label our pods with the
 	// topology type we set standalone as the default one.
 	// We do not need to pass this to habitat, as if no topology

pkg/controller/v1beta2/stateful_sets.go

@@ -45,6 +45,13 @@ func (hc *HabitatController) newStatefulSet(h *habv1beta1.Habitat) (*appsv1beta1
 			"--group", *hs.Service.Group)
 	}
 
+	if hs.Service.Channel != nil {
+		// When a service is started without explicitly naming the channel,
+		// it's assigned to the stable channel.
+		habArgs = append(habArgs,
+			"--channel", *hs.Service.Channel)
+	}
+
 	// As we want to label our pods with the
 	// topology type we set standalone as the default one.
 	// We do not need to pass this to habitat, as if no topology