ceph问题

问题1：

[root@admin-node my-cluster]# ceph -s
    cluster 4ca35731-2ccf-47fb-9f06-41fae858626d
     health HEALTH_WARN
            too few PGs per OSD ( < min )
     monmap e1:  mons at {node1=/}
            election epoch , quorum  node1
     osdmap e126:  osds:  up,  in
      pgmap v244:  pgs,  pools,  bytes data,  objects
             MB used,  GB /  GB avail
                   active+clean
                  

解决方法： 需要修改pg_num , pgp_num .
1.先要获取pool name, 如下, 返回pool name : rbd.

[root@admin-node my-cluster]# ceph osd pool stats
pool rbd id
  nothing is going on
  

2.修改pool对应的pg_num和pgp_num.

[root@admin-node my-cluster]# ceph osd pool
 pg_num to 

3.同时还需要调整pgp_num

[root@admin-node my-cluster]# ceph osd pool
 pgp_num to 

这时查看：

[root@admin-node my-cluster]# ceph health detail
HEALTH_WARN too few PGs per OSD ( < min )
too few PGs per OSD ( < min )

需要注意, pg_num只能增加, 不能缩小.

[root@admin-node my-cluster]# ceph osd pool
 pg_num to 

注意:调整pgp时，要先等pg创建完毕，再设置pgp，否则出现：    Error EBUSY: currently creating pgs, wait

[root@admin-node my-cluster]# ceph osd pool
Error EBUSY: currently creating pgs, wait
 
[root@admin-node my-cluster]# ceph health
HEALTH_OK