ceph存储 ceph集群运维常用指令

一、集群

1、启动一个ceph 进程

启动mon进程

service ceph start mon.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

[root@client ~]# ceph health

HEALTH_OK

3、查看ceph的实时运行状态

[root@client ~]# 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 [INF] 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

[root@client ~]# 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

[root@client ~]#

5、查看ceph存储空间

[root@client ~]# 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

[root@client ~]#

6、删除一个节点的所有的ceph数据包

[root@node1 ~]# ceph-deploy purge node1

[root@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

[root@node1 ~]# ceph daemon mon.node1 config show | more

13、查看集群健康状态细节

[root@admin ~]# 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 [1,2]

pg 3.36 is stuck inactive since forever, current state down+peering, last acting [1,2]

pg 3.79 is stuck inactive since forever, current state down+peering, last acting [1,0]

pg 3.5 is stuck inactive since forever, current state down+peering, last acting [1,2]

pg 3.30 is stuck inactive since forever, current state down+peering, last acting [1,2]

pg 3.1a is stuck inactive since forever, current state down+peering, last acting [1,0]

pg 3.2d is stuck inactive since forever, current state down+peering, last acting [1,0]

pg 3.16 is stuck inactive since forever, current state down+peering, last acting [1,2]

14、查看ceph log日志所在的目录

[root@node1 ~]# 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

[root@client ~]# 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

[root@client ~]# ceph quorum_status

{"election_epoch":294,"quorum":[0,1,2],"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

[root@client ~]# 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

[root@node1 ~]# 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 7f4d16bfd700 0 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

[root@node3 ~]# ceph mon getmap -o 1.txt

got monmap epoch 6

6、查看上面获得的map

[root@node3 ~]# 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

[root@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

[root@node1 ~]# ceph daemon mon.node1 mon_status

{ "name": "node1",

"rank": 0,

"state": "leader",

"election_epoch": 96,

"quorum": [

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

[root@os-node1 ~]# 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

[root@client ~]# ceph mds stat

e95: 1/1/1 up {0=node2=up:active}, 1 up:standby

2、查看msd的映射信息

[root@client ~]# 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_epoch 81

compat compat={},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

[root@node1 ~]# ceph mds rm 0 mds.node1

mds gid 0 dne

四、osd

1、查看ceph osd运行状态

[root@client ~]# ceph osd stat

osdmap e88: 3 osds: 3 up, 3 in

2、查看osd映射信息

[root@client ~]# 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 in weight 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 in weight 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 in weight 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

[root@client ~]#

3、查看osd的目录树

[root@client ~]# ceph osd tree

# id weight type 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

[root@node1 ~]# ceph osd down 0 #down掉osd.0节点

5、在集群中删除一个osd硬盘

[root@node4 ~]# ceph osd rm 0

removed osd.0

6、在集群中删除一个osd 硬盘 crush map

[root@node1 ~]# ceph osd crush rm osd.0

7、在集群中删除一个osd的host节点

[root@node1 ~]# ceph osd crush rm node1

removed item id -2 name 'node1' from crush map

查看最大osd的个数

[root@node1 ~]# 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）

[root@node1 ~]# 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：

[root@admin ~]# 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

[root@admin ~]# ceph osd tree

# id weight type 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

[root@admin ~]# ceph osd crush reweight osd.3 1.0

reweighted item id 3 name 'osd.3' to 1 in crush map

[root@admin ~]# ceph osd tree

# id weight type 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

[root@admin ~]# ceph osd reweight 3 0.5

reweighted osd.3 to 0.5 (8327682)

[root@admin ~]# ceph osd tree

# id weight type 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

[root@admin ~]# ceph osd out osd.3

marked out osd.3.

[root@admin ~]# ceph osd tree

# id weight type 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

[root@admin ~]# ceph osd in osd.3

marked in osd.3.

[root@admin ~]# ceph osd tree

# id weight type 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）

[root@admin ~]# ceph osd pause

set pauserd,pausewr

14、再次开启osd （开启后再次接收数据）

[root@admin ~]# 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

[root@client ~]# 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 acting acting_primary last_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 52'128 88:242 [0,2] 0 [0,2] 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 [2,1] 2 [2,1] 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 [2,1] 2 [2,1] 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 [2,1] 2 [2,1] 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 52'130 88:304 [2,0] 2 [2,0] 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 [0,2] 0 [0,2] 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 [0,2] 0 [0,2] 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 [1,2] 1 [1,2] 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 52'149 88:300 [0,2] 0 [0,2] 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 [2,1] 2 [2,1] 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 [2,1] 2 [2,1] 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 [1,2] 1 [1,2] 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 52'157 88:385 [1,0] 1 [1,0] 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 [0,1] 0 [0,1] 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 [2,0] 2 [2,0] 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 [0,2] 0 [0,2] 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 52'137 88:278 [0,2] 0 [0,2] 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 [1,0] 1 [1,0] 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 [2,0] 2 [2,0] 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 [1,0] 1 [1,0] 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 52'149 88:288 [0,2] 0 [0,2] 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 [1,0] 1 [1,0] 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 [1,2] 1 [1,2] 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 [2,1] 2 [2,1] 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 52'164 88:432 [1,0] 1 [1,0] 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

[root@client ~]# ceph pg map 0.3f

osdmap e88 pg 0.3f (0.3f) -> up [0,2] acting [0,2] #其中的[0,2]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

[root@client ~]# 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

[root@client ~]# ceph pg 0.26 query

5、查看pg中stuck的状态

[root@client ~]# ceph pg dump_stuck unclean

[root@client ~]# ceph pg dump_stuck inactive

[root@client ~]# ceph pg dump_stuck stale

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

[root@admin ~]# 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 jiayuan jiayuan --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

[root@admin ~]# 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

[root@admin ~]#

6、给一个pool创建一个快照

[root@admin ~]# ceph osd pool mksnap data date-snap

created pool data snap date-snap

7、删除pool的快照

[root@admin ~]# ceph osd pool rmsnap data date-snap

removed pool data snap date-snap

8、查看data池的pg数量

[root@admin ~]# 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)

[root@admin ~]# 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

[root@admin ~]# 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2

[root@admin ~]# ceph osd pool set data min_size 2

set pool 0 min_size to 2

12、查看集群中所有pool的副本尺寸

[root@admin mycephfs]# 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

[root@admin ~]# 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

[root@admin ~]# ceph osd pool set data pgp_num 100

set pool 0 pgp_num to 100

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)

[root@node-44 ~]# 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

[root@node-44 ~]# 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

[root@node-44 ~]#

（3）、创建一个pool

[root@node-44 ~]#rados mkpool test

(4)、查看ceph pool中的ceph object （这里的object是以块形式存储的）

[root@node-44 ~]# 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

[root@admin-node ~]# rados create test-object -p test

[root@admin-node ~]# rados -p test ls

test-object

（6）、删除一个对象

[root@admin-node ~]# 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

[root@node-44 ~]# rbd ls images

2014-05-24 17:17:37.043659 7f14caa6e700 0 -- :/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

[root@node-44 ~]# rbd ls volumes

2014-05-24 17:22:18.649929 7f9e98733700 0 -- :/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

[root@node-44 ~]# 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

[root@node-44 ~]# rbd create -p test --size 10000 zhanguo

[root@node-44 ~]# 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

[root@node-44 ~]#

（4）、删除一个镜像

[root@node-44 ~]# rbd rm -p test lizhanguo

Removing image: 100% complete...done.

（5）、调整一个镜像的尺寸

[root@node-44 ~]# rbd resize -p test --size 20000 zhanguo

Resizing image: 100% complete...done.

[root@node-44 ~]# 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

[root@node-44 ~]#

（6）、给一个镜像创建一个快照

[root@node-44 ~]# rbd snap create test/zhanguo@zhanguo123 #池/镜像@快照

[root@node-44 ~]# rbd snap ls -p test zhanguo

SNAPID NAME SIZE

2 zhanguo123 20000 MB

[root@node-44 ~]#

[root@node-44 ~]# 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

[root@node-44 ~]#

（7）、查看一个镜像文件的快照

[root@os-node101 ~]# 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

[root@os-node101 ~]# 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。

[root@os-node101 ~]# rbd snap unprotect volumes/volume-7687988d-16ef-4814-8a2c-3fbd85e928e4@snapshot-ee7862aa-825e-4004-9587-879d60430a12

[root@os-node101 ~]# 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

[root@os-node101 ~]# 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

[root@node-44 ~]# rbd export -p images --image 74cb427c-cee9-47d0-b467-af217a67e60a /root/aaa.img

2014-05-24 17:16:15.197695 7ffb47a9a700 0 -- :/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

[root@node-44 ~]# 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 7f14ad39f700 0 -- :/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）

[root@node-44 ~]# rbd import /root/aaa.img -p images --image 74cb427c-cee9-47d0-b467-af217a67e60a

Importing image: 100% complete...done.

(责任编辑：IT)

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