ceph的常见命令

1、ceph设置回填速度

for  i  in  {0..125}
do
ceph tell osd.$i injectargs "--osd_max_backfills 1";
done

for  i  in  {0..125}
do
ceph tell osd.$i injectargs "--osd_recovery_max_active 1";
done

for  i  in  {0..125}
do
ceph tell osd.$i injectargs "--osd_recovery_max_single_start 3";
done

2、ceph设置阀值

ceph pg set_nearfull_ratio 0.95                                     # 设置 nearfull 阈值告警10 版本用不了这个

ceph pg set_full_ratio 0.95                                         # 设置 osd 最大限制，超过就不能读写

ceph daemon osd.0 config show | grep ratio                          # 查看 osd 配置详情

ceph tell osd.* injectargs --osd_backfill_full_ratio 0.95           # 修改所有 osd 配置

ceph daemon osd.x dump_historic_ops                                 # 显示 osd 的 op 处理流程情况

3、L版OSD换盘

1、OSD的标志位

ceph osd set norebalance
ceph osd set nobackfill
ceph osd set noout
ceph osd set noscrub
ceph osd set nodeep-scrub

ceph osd unset norebalance
ceph osd unset nobackfill
ceph osd unset noout
ceph osd unset noscrub
ceph osd unset nodeep-scrub

2、 记录OSD对应的journal盘符

ll /var/lib/ceph/osd/ceph-*/journal

3、删除osd

ceph osd crush reweight osd.${id} 0
ceph osd crush rm osd.${id}
ceph osd rm osd.${id}
ceph auth del osd.${id}

　4、换盘

将新加的盘的权限修改
chown ceph:ceph /dev/sdX

　5、部署osd

ceph-disk prepare /dev/sdv /dev/disk/by-partuuid/f619b6e5-8f93-4ab2-8bb3-5c6cb0326e88 --zap-disk --filestore 
#注意，找到osd之前对应的日志盘的partuuid