ceph指定磁盘类型创建存储池

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介绍

在用openstack的时候，有sas盘，有ssd盘，想将外挂卷用sas盘，故通过改crush规则实现

实现方式

创建

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创建两条rule host分别指定为ssd/hdd
# ceph osd crush rule create-replicated rule-ssd default  host ssd
# ceph osd crush rule create-replicated rule-hdd default  host hdd

修改pool绑定的rule
# ceph osd pool set images crush_rule rule-ssd
# ceph osd pool set volumes crush_rule rule-hdd
# ceph osd pool set vms crush_rule rule-ssd

查看规则内容

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ceph osd crush rule dump

获取crush map

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ceph osd getcrushmap -o crushmapgot

反编译crush map

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crushtool -d crushmapgot -o decrushmap
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