史上最全的Ceph运维指令
一、集群1、启动一个ceph 进程
启动mon进程
service ceph startmon.node1
启动msd进程
service ceph start mds.node1
启动osd进程
service ceph start osd.0
2、查看机器的监控状态
# ceph health
HEALTH_OK
3、查看ceph的实时运行状态
# ceph -w
cluster be1756f2-54f7-4d8f-8790-820c82721f17
health HEALTH_OK
monmap e2: 3 mons at {node1=10.240.240.211:6789/0,node2=10.240.240.212:6789/0,node3=10.240.240.213:6789/0}, election epoch 294, quorum 0,1,2 node1,node2,node3
mdsmap e95: 1/1/1 up {0=node2=up:active}, 1 up:standby
osdmap e88: 3 osds: 3 up, 3 in
pgmap v1164: 448 pgs, 4 pools, 10003 MB data, 2520 objects
23617 MB used, 37792 MB / 61410 MB avail
448 active+clean
2014-06-30 00:48:28.756948 mon.0 pgmap v1163: 448 pgs: 448 active+clean; 10003 MB data, 23617 MB used, 37792 MB / 61410 MB avail
4、检查信息状态信息
# ceph -s
cluster be1756f2-54f7-4d8f-8790-820c82721f17
health HEALTH_OK
monmap e2: 3 mons at {node1=10.240.240.211:6789/0,node2=10.240.240.212:6789/0,node3=10.240.240.213:6789/0}, election epoch 294, quorum 0,1,2 node1,node2,node3
mdsmap e95: 1/1/1 up {0=node2=up:active}, 1 up:standby
osdmap e88: 3 osds: 3 up, 3 in
pgmap v1164: 448 pgs, 4 pools, 10003 MB data, 2520 objects
23617 MB used, 37792 MB / 61410 MB avail
448 active+clean
#
5、查看ceph存储空间
# ceph df
GLOBAL:
SIZE AVAIL RAW USED %RAW USED
61410M 37792M 23617M 38.46
POOLS:
NAME ID USED %USED OBJECTS
data 0 10000M 16.28 2500
metadata 1 3354k 0 20
rbd 2 0 0 0
jiayuan 3 0 0 0
#
6、删除一个节点的所有的ceph数据包
# ceph-deploy purge node1
# ceph-deploy purgedata node1
7、为ceph创建一个admin用户并为admin用户创建一个密钥，把密钥保存到/etc/ceph目录下：
ceph auth get-or-create client.admin mds 'allow' osd 'allow *' mon 'allow *' > /etc/ceph/ceph.client.admin.keyring
或
ceph auth get-or-create client.admin mds 'allow' osd 'allow *' mon 'allow *' -o /etc/ceph/ceph.client.admin.keyring
8、为osd.0创建一个用户并创建一个key
ceph auth get-or-create osd.0 mon 'allow rwx' osd 'allow *' -o /var/lib/ceph/osd/ceph-0/keyring
9、为mds.node1创建一个用户并创建一个key
ceph auth get-or-create mds.node1 mon 'allow rwx' osd 'allow *' mds 'allow *' -o /var/lib/ceph/mds/ceph-node1/keyring
10、查看ceph集群中的认证用户及相关的key
ceph auth list
11、删除集群中的一个认证用户
ceph auth del osd.0
12、查看集群的详细配置
# ceph daemon mon.node1 config show | more
13、查看集群健康状态细节
# ceph health detail
HEALTH_WARN 12 pgs down; 12 pgs peering; 12 pgs stuck inactive; 12 pgs stuck unclean
pg 3.3b is stuck inactive since forever, current state down+peering, last acting
pg 3.36 is stuck inactive since forever, current state down+peering, last acting
pg 3.79 is stuck inactive since forever, current state down+peering, last acting
pg 3.5 is stuck inactive since forever, current state down+peering, last acting
pg 3.30 is stuck inactive since forever, current state down+peering, last acting
pg 3.1a is stuck inactive since forever, current state down+peering, last acting
pg 3.2d is stuck inactive since forever, current state down+peering, last acting
pg 3.16 is stuck inactive since forever, current state down+peering, last acting
14、查看ceph log日志所在的目录
# ceph-conf --name mon.node1 --show-config-value log_file
/var/log/ceph/ceph-mon.node1.log
二、mon
1、查看mon的状态信息
# ceph mon stat
e2: 3 mons at {node1=10.240.240.211:6789/0,node2=10.240.240.212:6789/0,node3=10.240.240.213:6789/0}, election epoch 294, quorum 0,1,2 node1,node2,node3
2、查看mon的选举状态
# ceph quorum_status
{"election_epoch":294,"quorum":,"quorum_names":["node1","node2","node3"],"quorum_leader_name":"node1","monmap":{"epoch":2,"fsid":"be1756f2-54f7-4d8f-8790-820c82721f17","modified":"2014-06-26 18:43:51.671106","created":"0.000000","mons":[{"rank":0,"name":"node1","addr":"10.240.240.211:6789\/0"},{"rank":1,"name":"node2","addr":"10.240.240.212:6789\/0"},{"rank":2,"name":"node3","addr":"10.240.240.213:6789\/0"}]}}
3、查看mon的映射信息
# ceph mon dump
dumped monmap epoch 2
epoch 2
fsid be1756f2-54f7-4d8f-8790-820c82721f17
last_changed 2014-06-26 18:43:51.671106
created 0.000000
0: 10.240.240.211:6789/0 mon.node1
1: 10.240.240.212:6789/0 mon.node2
2: 10.240.240.213:6789/0 mon.node3
4、删除一个mon节点
# ceph mon remove node1
removed mon.node1 at 10.39.101.1:6789/0, there are now 3 monitors
2014-07-07 18:11:04.974188 7f4d16bfd7000 monclient: hunting for new mon
5、获得一个正在运行的mon map，并保存在1.txt文件中
# ceph mon getmap -o 1.txt
got monmap epoch 6
6、查看上面获得的map
#monmaptool --print 1.txt
monmaptool: monmap file 1.txt
epoch 6
fsid 92552333-a0a8-41b8-8b45-c93a8730525e
last_changed 2014-07-07 18:22:51.927205
created 0.000000
0: 10.39.101.1:6789/0 mon.node1
1: 10.39.101.2:6789/0 mon.node2
2: 10.39.101.3:6789/0 mon.node3
#
7、把上面的mon map注入新加入的节点
ceph-mon -i node4 --inject-monmap 1.txt
8、查看mon的amin socket
root@node1 ~]# ceph-conf --name mon.node1 --show-config-value admin_socket
/var/run/ceph/ceph-mon.node1.asok
9、查看mon的详细状态
# ceph daemon mon.node1mon_status
{ "name": "node1",
"rank": 0,
"state": "leader",
"election_epoch": 96,
"quorum": [
0,
1,
2],
"outside_quorum": [],
"extra_probe_peers": [
"10.39.101.4:6789\/0"],
"sync_provider": [],
"monmap": { "epoch": 6,
"fsid": "92552333-a0a8-41b8-8b45-c93a8730525e",
"modified": "2014-07-07 18:22:51.927205",
"created": "0.000000",
"mons": [
{ "rank": 0,
"name": "node1",
"addr": "10.39.101.1:6789\/0"},
{ "rank": 1,
"name": "node2",
"addr": "10.39.101.2:6789\/0"},
{ "rank": 2,
"name": "node3",
"addr": "10.39.101.3:6789\/0"}]}
10、删除一个mon节点
# ceph mon remove os-node1
removed mon.os-node1 at 10.40.10.64:6789/0, there are now 3 monitors
三、msd
1、查看msd状态
# ceph mds stat
e95: 1/1/1 up {0=node2=up:active}, 1 up:standby
2、查看msd的映射信息
# ceph mds dump
dumped mdsmap epoch 95
epoch 95
flags 0
created 2014-06-26 18:41:57.686801
modified 2014-06-30 00:24:11.749967
tableserver 0
root 0
session_timeout 60
session_autoclose 300
max_file_size 1099511627776
last_failure 84
last_failure_osd_epoch81
compatcompat={},rocompat={},incompat={1=base v0.20,2=client writeable ranges,3=default file layouts on dirs,4=dir inode in separate object,5=mds uses versioned encoding,6=dirfrag is stored in omap}
max_mds 1
in 0
up {0=5015}
failed
stopped
data_pools 0
metadata_pool 1
inline_data disabled
5015: 10.240.240.212:6808/3032 'node2' mds.0.12 up:active seq 30
5012: 10.240.240.211:6807/3459 'node1' mds.-1.0 up:standby seq 38
3、删除一个mds节点
# cephmds rm 0 mds.node1
mds gid 0 dne
4、设置cephfs文件系统存储方式最大单个文件尺寸
#ceph mds set max_file_size 1024000000000
四、osd
1、查看ceph osd运行状态
# ceph osd stat
osdmap e88: 3 osds: 3 up, 3 in
2、查看osd映射信息
# ceph osd dump
epoch 88
fsid be1756f2-54f7-4d8f-8790-820c82721f17
created 2014-06-26 18:41:57.687442
modified 2014-06-30 00:46:27.179793
flags
pool 0 'data' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 1 owner 0 flags hashpspool crash_replay_interval 45 stripe_width 0
pool 1 'metadata' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 1 owner 0 flags hashpspool stripe_width 0
pool 2 'rbd' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 1 owner 0 flags hashpspool stripe_width 0
pool 3 'jiayuan' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 256 pgp_num 256 last_change 73 owner 0 flags hashpspool stripe_width 0
max_osd 3
osd.0 up inweight 1 up_from 65 up_thru 75 down_at 64 last_clean_interval [53,55) 10.240.240.211:6800/3089 10.240.240.211:6801/3089 10.240.240.211:6802/3089 10.240.240.211:6803/3089 exists,up 8a24ad16-a483-4bac-a56a-6ed44ab74ff0
osd.1 up inweight 1 up_from 59 up_thru 74 down_at 58 last_clean_interval [31,55) 10.240.240.212:6800/2696 10.240.240.212:6801/2696 10.240.240.212:6802/2696 10.240.240.212:6803/2696 exists,up 8619c083-0273-4203-ba57-4b1dabb89339
osd.2 up inweight 1 up_from 62 up_thru 74 down_at 61 last_clean_interval [39,55) 10.240.240.213:6800/2662 10.240.240.213:6801/2662 10.240.240.213:6802/2662 10.240.240.213:6803/2662 exists,up f8107c04-35d7-4fb8-8c82-09eb885f0e58
#
3、查看osd的目录树
# ceph osd tree
# id weighttype name up/down reweight
-1 3 root default
-2 1 host node1
0 1 osd.0 up 1
-3 1 host node2
1 1 osd.1 up 1
-4 1 host node3
2 1 osd.2 up 1
4、down掉一个osd硬盘
# ceph osd down 0 #down掉osd.0节点
5、在集群中删除一个osd硬盘
# ceph osd rm 0
removed osd.0
6、在集群中删除一个osd 硬盘 crush map
# ceph osd crush rm osd.0
7、在集群中删除一个osd的host节点
# ceph osd crush rm node1
removed item id -2 name 'node1' from crush map
查看最大osd的个数
# ceph osd getmaxosd
max_osd = 4 in epoch 514 #默认最大是4个osd节点
8、设置最大的osd的个数（当扩大osd节点的时候必须扩大这个值）
# ceph osd setmaxosd 10
9、设置osd crush的权重为1.0
ceph osd crush set {id} {weight} [{loc1} [{loc2} ...]]
例如：
# ceph osd crush set 3 3.0 host=node4
set item id 3 name 'osd.3' weight 3 at location {host=node4} to crush map
# ceph osd tree
# id weighttype name up/down reweight
-1 6 root default
-2 1 host node1
0 1 osd.0 up 1
-3 1 host node2
1 1 osd.1 up 1
-4 1 host node3
2 1 osd.2 up 1
-5 3 host node4
3 3 osd.3 up 0.5
或者用下面的方式
# ceph osd crush reweight osd.3 1.0
reweighted item id 3 name 'osd.3' to 1 in crush map
# ceph osd tree
# id weighttype name up/down reweight
-1 4 root default
-2 1 host node1
0 1 osd.0 up 1
-3 1 host node2
1 1 osd.1 up 1
-4 1 host node3
2 1 osd.2 up 1
-5 1 host node4
3 1 osd.3 up 0.5
10、设置osd的权重
# ceph osd reweight 3 0.5
reweighted osd.3 to 0.5 (8327682)
# ceph osd tree
# id weighttype name up/down reweight
-1 4 root default
-2 1 host node1
0 1 osd.0 up 1
-3 1 host node2
1 1 osd.1 up 1
-4 1 host node3
2 1 osd.2 up 1
-5 1 host node4
3 1 osd.3 up 0.5
11、把一个osd节点逐出集群
# ceph osd out osd.3
marked out osd.3.
# ceph osd tree
# id weighttype name up/down reweight
-1 4 root default
-2 1 host node1
0 1 osd.0 up 1
-3 1 host node2
1 1 osd.1 up 1
-4 1 host node3
2 1 osd.2 up 1
-5 1 host node4
3 1 osd.3 up 0 # osd.3的reweight变为0了就不再分配数据，但是设备还是存活的
12、把逐出的osd加入集群
# ceph osd in osd.3
marked in osd.3.
# ceph osd tree
# id weighttype name up/down reweight
-1 4 root default
-2 1 host node1
0 1 osd.0 up 1
-3 1 host node2
1 1 osd.1 up 1
-4 1 host node3
2 1 osd.2 up 1
-5 1 host node4
3 1 osd.3 up 1
13、暂停osd （暂停后整个集群不再接收数据）
# ceph osd pause
set pauserd,pausewr
14、再次开启osd （开启后再次接收数据）
# ceph osd unpause
unset pauserd,pausewr
15、查看一个集群osd.2参数的配置
ceph --admin-daemon /var/run/ceph/ceph-osd.2.asok config show | less
五、PG组
1、1、查看pg组的映射信息
# ceph pg dump
dumped all in format plain
version 1164
stamp 2014-06-30 00:48:29.754714
last_osdmap_epoch 88
last_pg_scan 73
full_ratio 0.95
nearfull_ratio 0.85
pg_stat objects mip degr unf bytes log disklog state state_stamp v reported up up_primary actingacting_primarylast_scrub scrub_stamp last_deep_scrudeep_scrub_stamp
0.3f 39 0 0 0 163577856 128 128 active+clean 2014-06-30 00:30:59.193479 52'12888:242 0 0 44'25 2014-06-29 22:25:25.282347 0'0 2014-06-26 19:52:08.521434
3.3c 0 0 0 0 0 0 0 active+clean 2014-06-30 00:15:38.675465 0'0 88:21 2 2 0'0 2014-06-30 00:15:04.295637 0'0 2014-06-30 00:15:04.295637
2.3c 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:48.583702 0'0 88:46 2 2 0'0 2014-06-29 22:29:13.701625 0'0 2014-06-26 19:52:08.845944
1.3f 2 0 0 0 452 2 2 active+clean 2014-06-30 00:10:48.596050 16'2 88:66 2 2 16'2 2014-06-29 22:28:03.570074 0'0 2014-06-26 19:52:08.655292
0.3e 31 0 0 0 130023424 130 130 active+clean 2014-06-30 00:26:22.803186 52'13088:304 2 2 44'59 2014-06-29 22:26:41.317403 0'0 2014-06-26 19:52:08.518978
3.3d 0 0 0 0 0 0 0 active+clean 2014-06-30 00:16:57.548803 0'0 88:20 0 0 0'0 2014-06-30 00:15:19.101314 0'0 2014-06-30 00:15:19.101314
2.3f 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:58.750476 0'0 88:106 0 0 0'0 2014-06-29 22:27:44.604084 0'0 2014-06-26 19:52:08.864240
1.3c 1 0 0 0 0 1 1 active+clean 2014-06-30 00:10:48.939358 16'1 88:66 1 1 16'1 2014-06-29 22:27:35.991845 0'0 2014-06-26 19:52:08.646470
0.3d 34 0 0 0 142606336 149 149 active+clean 2014-06-30 00:23:57.348657 52'14988:300 0 0 44'57 2014-06-29 22:25:24.279912 0'0 2014-06-26 19:52:08.514526
3.3e 0 0 0 0 0 0 0 active+clean 2014-06-30 00:15:39.554742 0'0 88:21 2 2 0'0 2014-06-30 00:15:04.296812 0'0 2014-06-30 00:15:04.296812
2.3e 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:48.592171 0'0 88:46 2 2 0'0 2014-06-29 22:29:14.702209 0'0 2014-06-26 19:52:08.855382
1.3d 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:48.938971 0'0 88:58 1 1 0'0 2014-06-29 22:27:36.971820 0'0 2014-06-26 19:52:08.650070
0.3c 41 0 0 0 171966464 157 157 active+clean 2014-06-30 00:24:55.751252 52'15788:385 1 1 44'41 2014-06-29 22:26:34.829858 0'0 2014-06-26 19:52:08.513798
3.3f 0 0 0 0 0 0 0 active+clean 2014-06-30 00:17:08.416756 0'0 88:20 0 0 0'0 2014-06-30 00:15:19.406120 0'0 2014-06-30 00:15:19.406120
2.39 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:58.784789 0'0 88:71 2 2 0'0 2014-06-29 22:29:10.673549 0'0 2014-06-26 19:52:08.834644
1.3a 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:58.738782 0'0 88:106 0 0 0'0 2014-06-29 22:26:29.457318 0'0 2014-06-26 19:52:08.642018
0.3b 37 0 0 0 155189248 137 137 active+clean 2014-06-30 00:28:45.021993 52'13788:278 0 0 44'40 2014-06-29 22:25:22.275783 0'0 2014-06-26 19:52:08.510502
3.38 0 0 0 0 0 0 0 active+clean 2014-06-30 00:16:13.222339 0'0 88:21 1 1 0'0 2014-06-30 00:15:05.446639 0'0 2014-06-30 00:15:05.446639
2.38 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:58.783103 0'0 88:71 2 2 0'0 2014-06-29 22:29:06.688363 0'0 2014-06-26 19:52:08.827342
1.3b 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:58.857283 0'0 88:78 1 1 0'0 2014-06-29 22:27:30.017050 0'0 2014-06-26 19:52:08.644820
0.3a 40 0 0 0 167772160 149 149 active+clean 2014-06-30 00:28:47.002342 52'14988:288 0 0 44'46 2014-06-29 22:25:21.273679 0'0 2014-06-26 19:52:08.508654
3.39 0 0 0 0 0 0 0 active+clean 2014-06-30 00:16:13.255056 0'0 88:21 1 1 0'0 2014-06-30 00:15:05.447461 0'0 2014-06-30 00:15:05.447461
2.3b 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:48.935872 0'0 88:57 1 1 0'0 2014-06-29 22:28:35.095977 0'0 2014-06-26 19:52:08.844571
1.38 0 0 0 0 0 0 0 active+clean 2014-06-30 00:10:48.597540 0'0 88:46 2 2 0'0 2014-06-29 22:28:01.519137 0'0 2014-06-26 19:52:08.633781
0.39 48 0 0 0 201326592 164 164 active+clean 2014-06-30 00:25:30.757843 52'16488:432 1 1 44'32 2014-06-29 22:26:33.823947 0'0 2014-06-26 19:52:08.504628
下面部分省略
2、查看一个PG的map
# ceph pg map 0.3f
osdmap e88 pg 0.3f (0.3f) -> up acting #其中的代表存储在osd.0、osd.2节点，osd.0代表主副本的存储位置
3、查看PG状态
# ceph pg stat
v1164: 448 pgs: 448 active+clean; 10003 MB data, 23617 MB used, 37792 MB / 61410 MB avail
4、查询一个pg的详细信息
# ceph pg0.26 query
5、查看pg中stuck的状态
# ceph pg dump_stuck unclean
ok
# ceph pg dump_stuck inactive
ok
# ceph pg dump_stuck stale
ok
6、显示一个集群中的所有的pg统计
ceph pg dump --format plain
7、恢复一个丢失的pg
ceph pg {pg-id} mark_unfound_lost revert
8、显示非正常状态的pg
ceph pg dump_stuck inactive|unclean|stale
六、pool
1、查看ceph集群中的pool数量
# ceph osd lspools
0 data,1 metadata,2 rbd,
2、在ceph集群中创建一个pool
ceph osd pool create jiayuan 100 #这里的100指的是PG组
3、为一个ceph pool配置配额
ceph osd pool set-quota data max_objects 10000
4、在集群中删除一个pool
ceph osd pool delete jiayuanjiayuan--yes-i-really-really-mean-it#集群名字需要重复两次
5、显示集群中pool的详细信息
# rados df
pool name category KB objects clones degraded unfound rd rd KB wr wr KB
data - 475764704 116155 0 0 0 0 0 116379 475764704
metadata - 5606 21 0 0 0 0 0 314 5833
rbd - 0 0 0 0 0 0 0 0 0
total used 955852448 116176
total avail 639497596
total space 1595350044
#
6、给一个pool创建一个快照
# ceph osd pool mksnap data date-snap
created pool data snap date-snap
7、删除pool的快照
# ceph osd pool rmsnap data date-snap
removed pool data snap date-snap
8、查看data池的pg数量
# ceph osd pool get data pg_num
pg_num: 64
9、设置data池的最大存储空间为100T（默认是1T)
# ceph osd pool set data target_max_bytes 100000000000000
set pool 0 target_max_bytes to 100000000000000
10、设置data池的副本数是3
# ceph osd pool set data size 3
set pool 0 size to 3
11、设置data池能接受写操作的最小副本为1
# ceph osd pool set data min_size 1
set pool 0 min_size to 1
12、查看集群中所有pool的副本尺寸
# ceph osd dump | grep 'replicated size'
pool 0 'data' replicated size 3 min_size 2 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 26 owner 0 flags hashpspool crash_replay_interval 45 target_bytes 100000000000000 stripe_width 0
pool 1 'metadata' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 1 owner 0 flags hashpspool stripe_width 0
pool 2 'rbd' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 1 owner 0 flags hashpspool stripe_width 0
13、设置一个pool的pg数量
# ceph osd pool set data pg_num 100
set pool 0 pg_num to 100
14、设置一个pool的pgp数量
# ceph osd pool set data pgp_num 100
set pool 0 pgp_num to 100
15、设置一个池中object的大小
# ceph osd pool set-quota data max_objects 2048000 #单位为bytes
set-quota max_objects = 2048000 for pool data
七、rados和rbd指令
1、rados命令使用方法
（1）、查看ceph集群中有多少个pool （只是查看pool)
# rados lspools
data
metadata
rbd
images
volumes
.rgw.root
compute
.rgw.control
.rgw
.rgw.gc
.users.uid
（2）、查看ceph集群中有多少个pool,并且每个pool容量及利用情况
# rados df
pool name category KB objects clones degraded unfound rd rd KB wr wr KB
.rgw - 0 0 0 0 0 0 0 0 0
.rgw.control - 0 8 0 0 0 0 0 0 0
.rgw.gc - 0 32 0 0 0 57172 57172 38136 0
.rgw.root - 1 4 0 0 0 75 46 10 10
.users.uid - 1 1 0 0 0 0 0 2 1
compute - 67430708 16506 0 0 0 398128 75927848 1174683 222082706
data - 0 0 0 0 0 0 0 0 0
images - 250069744 30683 0 0 0 50881 195328724 65025 388375482
metadata - 0 0 0 0 0 0 0 0 0
rbd - 0 0 0 0 0 0 0 0 0
volumes - 79123929 19707 0 0 0 2575693 63437000 1592456 163812172
total used 799318844 66941
total avail 11306053720
total space 12105372564
#
（3）、创建一个pool
#rados mkpool test
(4)、查看ceph pool中的ceph object （这里的object是以块形式存储的）
# rados ls -p volumes | more
rbd_data.348f21ba7021.0000000000000866
rbd_data.32562ae8944a.0000000000000c79
rbd_data.589c2ae8944a.00000000000031ba
rbd_data.58c9151ff76b.00000000000029af
rbd_data.58c9151ff76b.0000000000002c19
rbd_data.58c9151ff76b.0000000000000a5a
rbd_data.58c9151ff76b.0000000000001c69
rbd_data.58c9151ff76b.000000000000281d
rbd_data.58c9151ff76b.0000000000002de1
rbd_data.58c9151ff76b.0000000000002dae
（5）、创建一个对象object
# rados create test-object -p test
# rados -p test ls
test-object
（6）、删除一个对象
# rados rm test-object-1 -p test
2、rbd命令的用法
（1）、查看ceph中一个pool里的所有镜像
# rbd ls images
2014-05-24 17:17:37.043659 7f14caa6e7000 -- :/1025604 >> 10.49.101.9:6789/0 pipe(0x6c5400 sd=3 :0 s=1 pgs=0 cs=0 l=1 c=0x6c5660).fault
2182d9ac-52f4-4f5d-99a1-ab3ceacbf0b9
34e1a475-5b11-410c-b4c4-69b5f780f03c
476a9f3b-4608-4ffd-90ea-8750e804f46e
60eae8bf-dd23-40c5-ba02-266d5b942767
72e16e93-1fa5-4e11-8497-15bd904eeffe
74cb427c-cee9-47d0-b467-af217a67e60a
8f181a53-520b-4e22-af7c-de59e8ccca78
9867a580-22fe-4ed0-a1a8-120b8e8d18f4
ac6f4dae-4b81-476d-9e83-ad92ff25fb13
d20206d7-ff31-4dce-b59a-a622b0ea3af6
# rbd ls volumes
2014-05-24 17:22:18.649929 7f9e987337000 -- :/1010725 >> 10.49.101.9:6789/0 pipe(0x96a400 sd=3 :0 s=1 pgs=0 cs=0 l=1 c=0x96a660).fault
volume-0788fc6c-0dd4-4339-bad4-e9d78bd5365c
volume-0898c5b4-4072-4cae-affc-ec59c2375c51
volume-2a1fb287-5666-4095-8f0b-6481695824e2
volume-35c6aad4-8ea4-4b8d-95c7-7c3a8e8758c5
volume-814494cc-5ae6-4094-9d06-d844fdf485c4
volume-8a6fb0db-35a9-4b3b-9ace-fb647c2918ea
volume-8c108991-9b03-4308-b979-51378bba2ed1
volume-8cf3d206-2cce-4579-91c5-77bcb4a8a3f8
volume-91fc075c-8bd1-41dc-b5ef-844f23df177d
volume-b1263d8b-0a12-4b51-84e5-74434c0e73aa
volume-b84fad5d-16ee-4343-8630-88f265409feb
volume-c03a2eb1-06a3-4d79-98e5-7c62210751c3
volume-c17bf6c0-80ba-47d9-862d-1b9e9a48231e
volume-c32bca55-7ec0-47ce-a87e-a883da4b4ccd
volume-df8961ef-11d6-4dae-96ee-f2df8eb4a08c
volume-f1c38695-81f8-44fd-9af0-458cddf103a3
（2）、查看ceph pool中一个镜像的信息
# rbd info -p images --image 74cb427c-cee9-47d0-b467-af217a67e60a
rbd image '74cb427c-cee9-47d0-b467-af217a67e60a':
size 1048 MB in 131 objects
order 23 (8192 KB objects)
block_name_prefix: rbd_data.95c7783fc0d0
format: 2
features: layering
（3）、在test池中创建一个命名为zhanguo的10000M的镜像
# rbd create -p test --size 10000 zhanguo
# rbd -p test info zhanguo #查看新建的镜像的信息
rbd image 'zhanguo':
size 10000 MB in 2500 objects
order 22 (4096 KB objects)
block_name_prefix: rb.0.127d2.2ae8944a
format: 1
#
（4）、删除一个镜像
# rbd rm-p testlizhanguo
Removing image: 100% complete...done.
（5）、调整一个镜像的尺寸
# rbd resize -p test --size 20000 zhanguo
Resizing image: 100% complete...done.
# rbd -p test info zhanguo #调整后的镜像大小
rbd image 'zhanguo':
size 20000 MB in 5000 objects
order 22 (4096 KB objects)
block_name_prefix: rb.0.127d2.2ae8944a
format: 1
#
（6）、给一个镜像创建一个快照
# rbdsnap createtest/zhanguo@zhanguo123#池/镜像@快照
# rbd snap ls-p test zhanguo
SNAPID NAME SIZE
2 zhanguo123 20000 MB
#
# rbd info test/zhanguo@zhanguo123
rbd image 'zhanguo':
size 20000 MB in 5000 objects
order 22 (4096 KB objects)
block_name_prefix: rb.0.127d2.2ae8944a
format: 1
protected: False
#
（7）、查看一个镜像文件的快照
# rbd snap ls-p volumes volume-7687988d-16ef-4814-8a2c-3fbd85e928e4
SNAPID NAME SIZE
5 snapshot-ee7862aa-825e-4004-9587-879d60430a12 102400 MB
（8）、删除一个镜像文件的一个快照快照
快照所在的池/ 快照所在的镜像文件 @ 快照
# rbd snap rm volumes/volume-7687988d-16ef-4814-8a2c-3fbd85e928e4@snapshot-ee7862aa-825e-4004-9587-879d60430a12
rbd: snapshot 'snapshot-60586eba-b0be-4885-81ab-010757e50efb' is protected from removal.
2014-08-18 19:23:42.099301 7fd0245ef760 -1 librbd: removing snapshot from header failed: (16) Device or resource busy
上面不能删除显示的报错信息是此快照备写保护了，下面命令是删除写保护后再进行删除。
# rbd snap unprotect volumes/volume-7687988d-16ef-4814-8a2c-3fbd85e928e4@snapshot-ee7862aa-825e-4004-9587-879d60430a12
# rbd snap rm volumes/volume-7687988d-16ef-4814-8a2c-3fbd85e928e4@snapshot-ee7862aa-825e-4004-9587-879d60430a12
（9）删除一个镜像文件的所有快照
# rbd snap purge-p volumes volume-7687988d-16ef-4814-8a2c-3fbd85e928e4
Removing all snapshots: 100% complete...done.
（10）、把ceph pool中的一个镜像导出
导出镜像
# rbd export -p images --image 74cb427c-cee9-47d0-b467-af217a67e60a /root/aaa.img
2014-05-24 17:16:15.197695 7ffb47a9a7000 -- :/1020493 >> 10.49.101.9:6789/0 pipe(0x1368400 sd=3 :0 s=1 pgs=0 cs=0 l=1 c=0x1368660).fault
Exporting image: 100% complete...done.
导出云硬盘
# rbd export -p volumes --image volume-470fee37-b950-4eef-a595-d7def334a5d6 /var/lib/glance/ceph-pool/volumes/Message-JiaoBenJi-10.40.212.24
2014-05-24 17:28:18.940402 7f14ad39f7000 -- :/1032237 >> 10.49.101.9:6789/0 pipe(0x260a400 sd=3 :0 s=1 pgs=0 cs=0 l=1 c=0x260a660).fault
Exporting image: 100% complete...done.
（11）、把一个镜像导入ceph中 （但是直接导入是不能用的，因为没有经过openstack,openstack是看不到的）
# rbd import /root/aaa.img -p images --image 74cb427c-cee9-47d0-b467-af217a67e60a
Importing image: 100% complete...done.
八、ceph crush规则
1、把ceph的crush map导出并转换为文本格式
#ceph osd getcrushmap -o test
#crushtool -d test -o test1
上面两条命令的解释：先把crush map以二进制的形式导入到test文本，再用crushtool工具把test里的二进制数据转换成文本形式保存到test1文档里。
2、把重新写的ceph crush导入ceph集群
#crushtool -c test1 -o test2 #把test1 转换成二进制形式
#ceph osd setcrushmap -i test2#把test2导入集群
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