2 files changed, 99 insertions, 0 deletions
diff --git a/src/ceph-volume/ceph_volume/drive_group/__init__.py b/src/ceph-volume/ceph_volume/drive_group/__init__.py
new file mode 100644
index 000000000..14a0fd721
--- /dev/null
+++ b/src/ceph-volume/ceph_volume/drive_group/__init__.py
@@ -0,0 +1 @@
+from .main import Deploy # noqa
diff --git a/src/ceph-volume/ceph_volume/drive_group/main.py b/src/ceph-volume/ceph_volume/drive_group/main.py
new file mode 100644
index 000000000..9e93bc759
--- /dev/null
+++ b/src/ceph-volume/ceph_volume/drive_group/main.py
@@ -0,0 +1,98 @@
+# -*- coding: utf-8 -*-
+
+import argparse
+import json
+import logging
+import sys
+
+from ceph.deployment.drive_group import DriveGroupSpec
+from ceph.deployment.drive_selection.selector import DriveSelection
+from ceph.deployment.translate import to_ceph_volume
+from ceph.deployment.inventory import Device
+from ceph_volume.inventory import Inventory
+from ceph_volume.devices.lvm.batch import Batch
+
+logger = logging.getLogger(__name__)
+
+class Deploy(object):
+
+    help = '''
+    Deploy OSDs according to a drive groups specification.
+
+    The DriveGroup specification must be passed in json.
+    It can either be (preference in this order)
+      - in a file, path passed as a positional argument
+      - read from stdin, pass "-" as a positional argument
+      - a json string passed via the --spec argument
+
+    Either the path postional argument or --spec must be specifed.
+    '''
+
+    def __init__(self, argv):
+        self.argv = argv
+
+    def main(self):
+        parser = argparse.ArgumentParser(
+            prog='ceph-volume drive-group',
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            description=self.help,
+        )
+        parser.add_argument(
+            'path',
+            nargs='?',
+            default=None,
+            help=('Path to file containing drive group spec or "-" to read from stdin'),
+        )
+        parser.add_argument(
+            '--spec',
+            default='',
+            nargs='?',
+            help=('drive-group json string')
+        )
+        parser.add_argument(
+            '--dry-run',
+            default=False,
+            action='store_true',
+            help=('dry run, only print the batch command that would be run'),
+        )
+        self.args = parser.parse_args(self.argv)
+        if self.args.path:
+            if self.args.path == "-":
+                commands = self.from_json(sys.stdin)
+            else:
+                with open(self.args.path, 'r') as f:
+                    commands = self.from_json(f)
+        elif self.args.spec:
+            dg = json.loads(self.args.spec)
+            commands = self.get_dg_spec(dg)
+        else:
+            # either --spec or path arg must be specified
+            parser.print_help(sys.stderr)
+            sys.exit(0)
+        cmd = commands.run()
+        if not cmd:
+            logger.error('DriveGroup didn\'t produce any commands')
+            return
+        if self.args.dry_run:
+            logger.info('Returning ceph-volume command (--dry-run was passed): {}'.format(cmd))
+            print(cmd)
+        else:
+            logger.info('Running ceph-volume command: {}'.format(cmd))
+            batch_args = cmd.split(' ')[2:]
+            b = Batch(batch_args)
+            b.main()
+
+    def from_json(self, file_):
+        dg = {}
+        dg = json.load(file_)
+        return self.get_dg_spec(dg)
+
+    def get_dg_spec(self, dg):
+        dg_spec = DriveGroupSpec._from_json_impl(dg)
+        dg_spec.validate()
+        i = Inventory(['--filter-for-batch'])
+        i.main()
+        inventory = i.get_report()
+        devices = [Device.from_json(i) for i in inventory]
+        selection = DriveSelection(dg_spec, devices)
+        return to_ceph_volume(selection)