ceph-volume devices.auto initial take on auto sub-command

Signed-off-by: Alfredo Deza <adeza@redhat.com>
(cherry picked from commit e3b04c9677c273f91e0a9de35dcd68c578d124db)

diff --git a/src/ceph-volume/ceph_volume/devices/auto/main.py b/src/ceph-volume/ceph_volume/devices/auto/main.py
new file mode 100644 (file)
index 0000000..d9b5019
--- /dev/null
+++ b/src/ceph-volume/ceph_volume/devices/auto/main.py
@@ -0,0 +1,70 @@
+import argparse
+from textwrap import dedent
+from ceph_volume import terminal, decorators
+from ceph_volume.util import disk
+
+
+device_list_template = """
+  * {path: <25} {size: <10} {state}"""
+
+
+def device_formatter(devices):
+    lines = []
+    for path, details in devices:
+        lines.append(device_list_template.format(
+            path=path, size=details['human_readable_size'],
+            state='solid' if details['rotational'] == '0' else 'rotational')
+        )
+
+    return ''.join(lines)
+
+
+class Auto(object):
+
+    help = 'Auto-detect devices for multi-OSD provisioning with minimal interaction'
+
+    _help = dedent("""
+    Automatically detect devices ready for OSD provisioning based on configurable strategies.
+
+    Detected devices:
+    {detected_devices}
+
+    Current strategy: {strategy_name}
+    Path: {strategy_path}
+
+    """)
+
+    # TODO: add the reporting sub-command here (list?)
+    mapper = {
+    }
+
+    def __init__(self, argv):
+        self.argv = argv
+
+    def get_devices(self):
+        all_devices = disk.get_devices()
+        # remove devices with partitions
+        # XXX Should be optional when getting device info
+        for device, detail in all_devices.items():
+            if detail.get('partitions') != {}:
+                del all_devices[device]
+        devices = sorted(all_devices.items(), key=lambda x: (x[0], x[1]['size']))
+        return device_formatter(devices)
+
+    def print_help(self, sub_help):
+        return self._help.format(
+            detected_devices=self.get_devices(),
+            strategy_name='default',
+            strategy_path='/etc/ceph/osd/strategies/default')
+
+    @decorators.needs_root
+    def main(self):
+        terminal.dispatch(self.mapper, self.argv)
+        parser = argparse.ArgumentParser(
+            prog='ceph-volume auto',
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            description=self.print_help(terminal.subhelp(self.mapper)),
+        )
+        parser.parse_args(self.argv)
+        if len(self.argv) <= 1:
+            return parser.print_help()