ceph 为ssd，sas osd设置不同的crush location

创建ssd root

ceph osd crush add-bucket ssd root

创建hostgroup

ceph osd crush add-bucket ssd-hosts hostgroup
ceph osd crush move ssd-hosts root=ssd

创建host

ceph osd crush add-bucket ssd-m1 host
ceph osd crush add-bucket ssd-compute host
ceph osd crush add-bucket ssd-network host

ceph osd crush move ssd-m1 hostgroup=ssd-hosts
ceph osd crush move ssd-compute hostgroup=ssd-hosts
ceph osd crush move ssd-network hostgroup=ssd-hosts

移动osd

ceph osd crush set osd.0 1.0 host=ssd-m1
ceph osd crush set osd.1 1.0 host=ssd-compute
ceph osd crush set osd.2 1.0 host=ssd-network

创建crush rule

ceph osd crush rule create-simple ssd ssd host firstn

查看crush rule

ceph osd crush rule dump
[
    {
        "rule_id": 0,
        "rule_name": "replicated_ruleset",
        "ruleset": 0,
        "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"
            }
        ]
    },
    {
        "rule_id": 1,
        "rule_name": "ssd",
        "ruleset": 1,
        "type": 1,
        "min_size": 1,
        "max_size": 10,
        "steps": [
            {
                "op": "take",
                "item": -9,
                "item_name": "ssd"
            },
            {
                "op": "chooseleaf_firstn",
                "num": 0,
                "type": "host"
            },
            {
                "op": "emit"
            }
        ]
    }
]