migrate old dg to cephadm osdspecs

dg_to_osdspec.py

deepsea_drive_group = """
drive_group_default:
  target: 'dc-north'
  data_devices:
    model: SSD-123-foo
  db_devices:
    model: MC-55-44-XZ
  format: bluestore
  encryption: True
---
another_dg:
  target: 'dc-south'
  data_devices:
    model: SSD_111_FD
  db_devices:
    model: NVME_222_LD
  format: bluestore
  encryption: False
"""


import yaml

class OrigDriveGroup:

    def migrate(self, data):
        self.__setattr__('service_type', 'osd')
        self.__setattr__('filter_logic', 'OR')
        for name, spec in data.items():
            self.__setattr__('service_id', name)
            for k, v in spec.items():
                self.__setattr__(k, v)

    def __setattr__(self, key, value):
        if key == 'format' and value not in ['bluestore']:
            raise Exception('Only <bluestore> is supported.')
        if key == 'target':
            self.__dict__['placement'] = dict(host_pattern=value)
            return
        # more known restrictions & changes go here
        self.__dict__[key] = value

    def to_yaml(self):
        return yaml.safe_dump(self.__dict__)


for dg in yaml.safe_load_all(deepsea_drive_group):
    dg_o = OrigDriveGroup()
    dg_o.migrate(dg)
    osdspec = dg_o.to_yaml()
    print(osdspec)
    
    
    
"""
data_devices:
  model: SSD-123-foo
db_devices:
  model: MC-55-44-XZ
encryption: true
filter_logic: OR
format: bluestore
placement:
  host_pattern: dc-north
service_id: drive_group_default
service_type: osd

data_devices:
  model: SSD_111_FD
db_devices:
  model: NVME_222_LD
encryption: false
filter_logic: OR
format: bluestore
placement:
  host_pattern: dc-south
service_id: another_dg
service_type: osd

"""