2.7.3. 簡単なルールの追加

ceph osd crush rule create-simple {rulename} {root} {bucket-type} {firstn|indep}

ceph osd crush rule create-simple deleteme default host firstn

{ "rule_id": 1,
  "rule_name": "deleteme",
  "ruleset": 1,
  "type": 1,
  "min_size": 1,
  "max_size": 10,
  "steps": [
        { "op": "take",
          "item": -1,
          "item_name": "default"},
        { "op": "chooseleaf_firstn",
          "num": 0,
          "type": "host"},
        { "op": "emit"}]}