make PVProvider optional in server config; disallow snap/restore PVs when not provided

Signed-off-by: Steve Kriss <steve@heptio.com>

examples/aws/00-ark-config.yaml

@@ -26,7 +26,6 @@ backupStorageProvider:
   bucket: <YOUR_BUCKET>
   aws:
     region: <YOUR_REGION>
-    availabilityZone: <YOUR_AVAILABILITY_ZONE>
 backupSyncPeriod: 30m
 gcSyncPeriod: 30m
 scheduleSyncPeriod: 1m

examples/azure/10-ark-config.yaml

@@ -24,9 +24,7 @@ persistentVolumeProvider:
     apiTimeout: <YOUR_TIMEOUT>
 backupStorageProvider:
   bucket: <YOUR_BUCKET>
-  azure:
-    location: <YOUR_LOCATION>
-    apiTimeout: <YOUR_TIMEOUT>
+  azure: {}
 backupSyncPeriod: 30m
 gcSyncPeriod: 30m
 scheduleSyncPeriod: 1m

examples/gcp/00-ark-config.yaml

@@ -24,9 +24,7 @@ persistentVolumeProvider:
     zone: <YOUR_ZONE>
 backupStorageProvider:
   bucket: <YOUR_BUCKET>
-  gcp:
-    project: <YOUR_PROJECT>
-    zone: <YOUR_ZONE>
+  gcp: {}
 backupSyncPeriod: 30m
 gcSyncPeriod: 30m
 scheduleSyncPeriod: 1m

examples/minio/10-ark-config.yaml

@@ -18,17 +18,10 @@ kind: Config
 metadata:
   namespace: heptio-ark
   name: default
-persistentVolumeProvider:
-  aws:
-    region: minio
-    availabilityZone: minio
-    s3ForcePathStyle: true
-    s3Url: http://minio:9000
 backupStorageProvider:
   bucket: ark
   aws:
     region: minio
-    availabilityZone: minio
     s3ForcePathStyle: true
     s3Url: http://minio:9000
 backupSyncPeriod: 1m