Added focker volume create.

focker.py

@@ -27,7 +27,7 @@ def create_parser():
     parser = subparsers.add_parser('build')
     parser.set_defaults(func=command_image_build)
     parser.add_argument('focker_dir', type=str)
-    parser.add_argument('--tag', '-t', type=str, nargs='+', default=[])
+    parser.add_argument('--tags', '-t', type=str, nargs='+', default=[])
 
     parser = subparsers.add_parser('tag')
     parser.set_defaults(func=command_image_tag)
@@ -62,7 +62,7 @@ def create_parser():
     subparsers = subparsers_top.add_parser('volume').add_subparsers()
     parser = subparsers.add_parser('create')
     parser.set_defaults(func=command_volume_create)
-    parser.add_argument('--tag', '-t', type=str, nargs='+', default=[])
+    parser.add_argument('--tags', '-t', type=str, nargs='+', default=[])
 
     parser = subparsers.add_parser('prune')
     parser.set_defaults(func=command_volume_prune)

image.py

@@ -74,8 +74,8 @@ def command_image_build(args):
         spec = yaml.safe_load(f)
     print('spec:', spec)
     image, image_sha256 = build(spec, args)
-    zfs_untag(args.tag)
-    zfs_tag(image.split('@')[0], args.tag)
+    zfs_untag(args.tags)
+    zfs_tag(image.split('@')[0], args.tags)
 
 
 def command_image_tag(args):

misc.py

@@ -0,0 +1,4 @@
+import random
+
+def random_sha256_hexdigest():
+    return bytes([ random.randint(0, 255) for _ in range(32) ]).hex()

volume.py

@@ -1,5 +1,16 @@
+from .misc import random_sha256_hexdigest
+from .zfs import *
+
+
 def command_volume_create(args):
-    raise NotImplementedError
+    sha256 = random_sha256_hexdigest()
+    poolname = zfs_poolname()
+    for pre in range(7, 64):
+        name = poolname + '/focker/volumes/' + sha256[:pre]
+        if not zfs_exists(name):
+            break
+    zfs_run(['zfs', 'create', '-o', 'focker:sha256=' + sha256, name])
+    zfs_tag(name, args.tags)
 
 
 def command_volume_prune(args):