9-创建存储策略并和pool关联

创建存储策略并和pool关联 创建存储策略并和pool关联

1. 添加池
```shell
# ceph osd pool create ssdpool 256 256
# ceph osd pool create hddpool 256 256
## 列出池
# ceph osd lspools
1 .mgr
2 ssdpool
3 hddpool
```
2. 创建规则以使用该设备
```shell
# ceph osd crush rule create-replicated ssd default host ssd
# ceph osd crush rule create-replicated hdd default host hdd
## 查看池规则
# ceph osd crush rule ls
replicated_rule
ssd
hdd
```
3. 将池设置为使用规则
```shell
ceph osd pool set ssdpool crush_rule ssd
ceph osd pool set hddpool crush_rule hdd
```
4. 删除池
```shell
## 删除池时，池的名字要输入2次
# ceph osd pool rm testpool --yes-i-really-really-mean-it
Error EPERM: WARNING: this will *PERMANENTLY DESTROY* all data stored in pool testpool.  If you are *ABSOLUTELY CERTAIN* that is what you want, pass the pool name *twice*, followed by --yes-i-really-really-mean-it.

# ceph osd pool rm testpool testpool --yes-i-really-really-mean-it
```