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"
}
]
}
]

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