Merge branch '9-add-option-to-set-backup-flag-of-new-disk-images' into 'master'

Resolve "Add option to set backup flag of new disk images"

Closes #9

See merge request !4

Chart.yaml

 apiVersion: "v1"
 name: "kubernetes-ghost"
-version: "0.1.0"
+version: "0.1.2"
+appVersion: "0.2.0"
 description: "A storage provisioner using Greenhost's cloud platform."
 sources:
   - "https://code.greenhost.net/open/kubernetes-ghost"

provisioner/cmd/provisioner/main.go

@@ -59,6 +59,13 @@ func (p *GreenhostProvisioner) Provision(options controller.VolumeOptions) (*v1.
 	pvName := options.PVC.ObjectMeta.Name
 	name := "kubernetes-ghost:" + pvName
 	region := os.Getenv("GHOST_CLOUD_REGION")
+	backup := os.Getenv("GHOST_IMAGE_BACKUP")
+	backupBool := backup == "true"
+	if (backupBool) {
+		glog.Info("disk image backups on")
+	} else {
+		glog.Info("disk image backups off")
+	}
 	requestedSize := options.PVC.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
 	// Round the requested size up to nearest integer number of gigabytes.
 	size := requestedSize.ScaledValue(9)
@@ -69,6 +76,7 @@ func (p *GreenhostProvisioner) Provision(options controller.VolumeOptions) (*v1.
 		Region:        region,
 		SizeGigaBytes: size,
 		ProjectID:     p.projectID,
+		Backup:        backupBool,
 	}
 	// The Cosmos API returns a description of the created disk image.
 	glog.Infof("Creating new disk image with specs %v", specs)

provisioner/ghost/ghost.go

@@ -14,6 +14,7 @@ type Specs struct {
 	Region        string `json:"region"`
 	SizeGigaBytes int64  `json:"size_gigabytes"`
 	ProjectID     string `json:"project_id"`
+	Backup        bool   `json:"backup"`
 }
 
 // This captures the response to a Cosmos2 API call for creating a disk.

templates/provisioner.yaml

@@ -25,6 +25,8 @@ spec:
           value: "{{ .Values.provisioner.cosmos_api_url }}"
         - name: GHOST_CLOUD_REGION
           value: "{{ .Values.provisioner.cosmos_location }}"
+        - name: GHOST_IMAGE_BACKUP
+          value: "{{ .Values.provisioner.backup }}"
         volumeMounts:
         - name: ca-certificates
           mountPath: /etc/ssl/certs/ca-certificates.crt

values.yaml

 provisioner:
   image:
     repository: "docker.greenhost.net/open/kubernetes-ghost/provisioner"
-    tag: "0.2.0"
+    tag: "0.3.0"
     pullPolicy: "Always"
   cosmos_api_url: "https://service.greenhost.net/api/v2"
   cosmos_location: "ams1"
+  # Set the value of the `backup` flag on newly created disk images, specifying
+  # whether automatic backups should be made.
+  backup: false
 
 driver:
   image: