关闭新创建卷的exclusive-lock功能 ceph 创建的镜像保留layering

admin

关闭新创建卷的exclusive-lock功能
5 X8 {* b. K- Q  }& ~, g4 }: G2 w如果是用Ceph Deploy进行的部署，则需要将配置文件分发到各个节点，在ceph.conf中增加rbd_default_features，写明你创建的卷需要哪几种属性。
$ `& j) p0 s- J! n$ N[global]
* K* b, ?7 B  F2 \! }- q
9 l; q- C# n+ g1 Jrbd_default_features = "layering, deep-flatten"
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% ]- n. B# [7 @- W+ Y
或者只保留
rbd_default_features = "layering"
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ceph-deploy --overwrite-conf config  push host09 host10 host11 compute06 compute07 compute08 compute09

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此时再使用rbd create创建的卷默认就是这两种属性了
[root@host09 deploy]# rbd create -p images testimage --size 5G
# i, g& E. h. ]: U/ |% o8 J[root@host09 deploy]# rbd info images/testimage
% w: _3 d% \2 M9 H0 n6 [/ G. T2 Wrbd image 'testimage':
size 5 GiB in 1280 objects
4 `- h" \' v# Q order 22 (4 MiB objects)
0 ~3 N1 b4 F5 `! q/ I" m4 [) ` snapshot_count: 0
: L& \- M2 f# T6 R id: 68b1eebfa9994b
block_name_prefix: rbd_data.68b1eebfa9994b
format: 2
features: layering
+ f, n- j9 x) H8 o; ~9 m" a1 ] op_features:
1 o& a9 K9 H6 U! b) H& q% ^ flags:
create_timestamp: Tue Dec 28 10:45:15 2021
. o/ D, a9 y2 \. z* k access_timestamp: Tue Dec 28 10:45:15 2021
modify_timestamp: Tue Dec 28 10:45:15 2021
, |) n, i9 v, [" v$ H
  |+ d6 A. a+ p+ [5 L, R
# G; [4 @0 b0 Q5 X最后还需要对OpenStack各个模块的ceph进行更新，如果使用kolla更新，则替换所有配置文件，并重启容器。
8 q* d/ c' s9 h/ v) _- j3 v; k; Y[root@host09 deploy]# scp ceph.conf controller1:/etc/kolla/config/glance/
  H# F+ ~6 {( o, ]) Bceph.conf                                                                                                                                                                      100%  595     1.2MB/s   00:00   
[root@host09 deploy]# scp ceph.conf controller1:/etc/kolla/config/nova
ceph.conf                                                                                                                                                                      100%  595     1.2MB/s   00:00   
[root@host09 deploy]# scp ceph.conf controller1:/etc/kolla/config/cinder
ceph.conf                                                                           
1 P1 Q, Y, a, A
# V! s* h6 E( S+ {8 j" w& Tkolla-ansible -i multinode reconfigure

需要重启cinder相关服务

6 t/ l- Q* Y; d! s
+ c5 A; P( f: ]
[root@host09 deploy]# rbd info volume-5764f3d4-6654-4d5d-ad7c-2c36d03d1ccb -p pool-ssd-2
rbd image 'volume-5764f3d4-6654-4d5d-ad7c-2c36d03d1ccb':
0 R& m  }4 i+ L  W" m5 O9 H" X size 10 GiB in 2560 objects
order 22 (4 MiB objects)
" r+ w* U! G/ S" Z4 e6 e snapshot_count: 0
! U" u5 j2 c$ _  X$ t) V1 u, L id: 8b52d05df0f51e
: p/ q7 E7 w( V# t) Z3 x) b block_name_prefix: rbd_data.8b52d05df0f51e
format: 2
features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
  S1 r& Z2 G! ^5 G( g# |% f op_features:
, L5 [. X) G( b- n flags:
; q3 F- `1 \7 Q) |' a) T- [ create_timestamp: Tue Dec 28 14:02:52 2021
access_timestamp: Tue Dec 28 14:02:52 2021
modify_timestamp: Tue Dec 28 14:02:52 2021
parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
overlap: 3 GiB
+ j/ ]4 r* p7 Q2 k8 H
[root@controller1 ~]# docker restart cinder_volume cinder_backup cinder_scheduler cinder_api
5 {6 ?: X" V- mcinder_volume
# O6 I, `; z2 B( c, S: \cinder_backup
" B: R& Q9 O) }% U" Ocinder_scheduler
cinder_api
1 F/ V5 b$ i7 U* u/ F8 R& G4 F3 @
5 k4 R5 A' D! J1 W
+ z" m6 N* U  ^. c& P0 e& x[root@host09 deploy]# rbd info volume-5764f3d4-6654-4d5d-ad7c-2c36d03d1ccb -p pool-ssd-2
5 G# I" F: i+ _9 j7 I# [# Nrbd: error opening image volume-5764f3d4-6654-4d5d-ad7c-2c36d03d1ccb: (2) No such file or directory
[root@host09 deploy]# rbd info volume-94e28573-bfb9-4092-8d81-34f1e4059d97 -p pool-ssd-2
rbd image 'volume-94e28573-bfb9-4092-8d81-34f1e4059d97':
: t9 E  D% b0 E size 10 GiB in 2560 objects
. [5 g" u0 E" u, h) | order 22 (4 MiB objects)
2 Q' m& u, c% W2 ^7 O2 C+ N- \* z: i snapshot_count: 0
id: 8b576837a8afd1
: L% d' F: K  k9 m$ i; h3 y block_name_prefix: rbd_data.8b576837a8afd1
format: 2
features: layering
op_features:
. _% q8 ^. i: x( m! R5 Y- G, v flags:
, T# p9 J2 R8 t  i8 U1 } create_timestamp: Tue Dec 28 14:07:46 2021
access_timestamp: Tue Dec 28 14:07:46 2021
  n) A# h6 d7 n  c& B( [/ G! \! h7 x modify_timestamp: Tue Dec 28 14:07:46 2021
- q/ M* ]6 P/ l; ] parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
overlap: 3 GiB
4 ]- n; }. J; s/ o8 M/ X: Y


关闭exclusive-lock功能
通过查看rbd info，获取当前卷是否开启了exclusive-lock
5 S6 }. X# L- \. U7 v2 v[root@compute201 ~]# rbd info volumes/volume-cad6425c-4453-4489-b2d1-45050b062bd2
+ h+ g7 X4 N, x1 I) m6 N0 q

! T- q) y# f$ G% Z4 J2 g6 F% B  R% Z关闭exclusive-lock功能，这里必须要和object-map或journaling一起关闭才能生效
$ H8 G3 \! N# d& l- ~9 ^" crbd feature disable volumes/volume-cad6425c-4453-4489-b2d1-45050b062bd2 exclusive-lock,object-map
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$ d' G4 Y- N9 U2 G再次查看功能列表，features只剩下layering和deep-flattern
% w" L' w# P0 e) |- x+ q6 e2 D[root@host09 ~]# rbd info volumes/volume-cad6425c-4453-4489-b2d1-45050b062bd2
rbd image '27cea94c-9351-462f-a8ab-2cc84c9c2373':
size 12 GiB in 1536 objects
order 23 (8 MiB objects)
7 g3 i" a0 J* e1 m snapshot_count: 1
6 `1 b- m$ V) ?" F7 c) u( N id: 6761d8e16f525e
block_name_prefix: rbd_data.6761d8e16f525e
; [6 w7 ~( |) U  h format: 2
0 l/ U0 b' m5 ^' y2 G1 d; N features: layering, deep-flatten
op_features:
flags:
3 Q' K' g) a" d3 t* P" N; H  W create_timestamp: Tue Dec 21 14:41:18 2021
access_timestamp: Tue Dec 21 14:41:18 2021
$ z3 S2 A2 g# h8 m/ k modify_timestamp: Tue Dec 21 14:41:18 2021
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  m6 @$ i# c& |( b0 ?1 N批量关闭所有卷的exclusive-lock
  c  c/ N2 I( {/ U

: n; Q5 [+ ^. o8 M& K) hfor i in $(rbd ls -p images );do rbd feature disable images/$i exclusive-lock,object-map,deep-flatten ;  rbd info images/$i ;done
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( X5 }9 Z: f6 \; Y1 H! V! F

admin

ceph支持 layering,striping exclusive lock, object map,fast diff ,deep-flatten 等新的new features
layering
image的克隆操作。可以对image创建快照并保护，然后从快照克隆出新的image出来，父子image之间采用COW技术，共享对象数据。

striping v2
$ m, z+ n3 g3 ^' H$ W条带化对象数据，类似raid 0，可改善顺序读写场景较多情况下的性能。

exclusive lock
. s  N) ^1 c* G* h( g; y' Q! \保护image数据一致性，对image做修改时，需要持有此锁。这个可以看做是一个分布式锁，在开启的时候，确保只有一个客户端在访问image，否则锁的竞争会导致io急剧下降。 主要应用场景是qemu live-migration。

object map
此特性依赖于exclusive lock。因为image的对象分配是thin-provisioning，此特性开启的时候，会记录image所有对象的一个位图，用以标记对象是否真的存在，在一些场景下可以加速io。

fast diff
此特性依赖于object map和exlcusive lock。快速比较image的snapshot之间的差异。

deep-flatten
layering特性使得克隆image的时候，父子image之间采用COW，他们之间的对象文件存在依赖关系，flatten操作的目的是解除父子image的依赖关系，但是子image的快照并没有解除依赖，deep-flatten特性使得快照的依赖也解除。

journaling
  _4 y- E4 L5 N8 W% V# M依赖于exclusive lock。将image的所有修改操作进行日志化，并且复制到另外一个集群（mirror)，可以做到块存储的异地灾备。这个特性在部署的时候需要新部署一个daemon进程，目前还在试验阶段，不过这个特性很重要，可以做跨集群/机房容灾。

创建image的时候，jewel默认开启的特性包括: layering/exlcusive lock/object map/fast diff/deep flatten

Exclusive Lock
从上面可以看出，很多特性都依赖于exclusive lock，重点介绍一下。

exclusive lock 是分布式锁，实现的时候默认是客户端在第一次写的时候获取锁，并且在收到其他客户端的锁请求时自动释放锁。这个特性在jewel默认开启后，本身没什么问题， 客户端可以自动获取和释放锁，在客户端crash后也能够正确处理。

admin

[root@host09 deploy]# for i in $(rbd ls -p pool-ssd-2);do rbd feature disable pool-ssd-2/$i exclusive-lock,object-map,deep-flatten ;  rbd info pool-ssd-2/$i ;done
rbd image 'volume-09fba6c8-5105-4ad5-9baf-2edc9c51fac7':
size 50 GiB in 12800 objects
order 22 (4 MiB objects)
snapshot_count: 0
6 R2 ?. m- @( O4 u id: 6764efb2270ebd
block_name_prefix: rbd_data.6764efb2270ebd
) u4 S" p3 M; K% R  ?" ? format: 2
9 g- c6 f9 p# a1 @ features: layering
op_features:
flags:
) n. f# I' h/ m1 i create_timestamp: Tue Dec 21 14:26:04 2021
access_timestamp: Tue Dec 21 14:26:04 2021
" n1 ~; U. n. Z' T modify_timestamp: Tue Dec 21 14:26:04 2021
( Y  \8 t% F7 h* E( h4 c9 s  ~1 Q7 p parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
& N  d, O. @* d# q4 J3 D overlap: 3 GiB
) q- b& c0 |: rrbd image 'volume-0d4b255b-5d7a-41a4-a29a-4b088f2abd7d':
4 k: u8 G! k& @+ W4 }9 o! C size 200 GiB in 51200 objects
order 22 (4 MiB objects)
7 w$ }) I6 S) ^+ p* ~) r snapshot_count: 0
2 c1 K. ~8 z) V9 r id: 76655d32817107
block_name_prefix: rbd_data.76655d32817107
7 S: V5 e$ ]3 |' m format: 2
# e. s% K; ^/ J! ^1 `/ T features: layering
op_features:
; N+ ^* D* n. R& O8 p flags:
9 ]  q6 ~! W3 J- w create_timestamp: Tue Dec 21 15:07:26 2021
; M) E6 x) |! W3 u$ y access_timestamp: Tue Dec 21 15:07:26 2021
modify_timestamp: Tue Dec 21 15:07:26 2021
rbd image 'volume-0e9a7ecb-4cb0-4f89-8831-da02a3fb23c6':
size 50 GiB in 12800 objects
& [/ H0 A& t- Q/ m5 G8 t order 22 (4 MiB objects)
snapshot_count: 0
id: 767423573973d5
# K; D* a  `/ B, Q# m$ P block_name_prefix: rbd_data.767423573973d5
+ H0 B, f* L3 n# y* ]8 O/ \ format: 2
9 {( P* ]4 J* G, X features: layering
0 g3 D$ a, o) B6 f op_features:
9 [. e" \) j! U$ O' b flags:
* }4 {. K( [2 v+ X  u create_timestamp: Tue Dec 21 14:25:33 2021
access_timestamp: Tue Dec 21 14:25:33 2021
modify_timestamp: Tue Dec 21 14:25:33 2021
parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
* v  o* k+ N+ ?: Y; n overlap: 3 GiB
5 e: w3 i- F! s. e9 |' Wrbd image 'volume-1a39ac81-4359-4e8c-b7b2-f5b8499c1136':
) s  y1 [9 P$ B9 q1 Q. d size 50 GiB in 12800 objects
5 n, _9 Z5 Z* K' G' x9 L( A order 22 (4 MiB objects)
+ b+ \3 E/ G, X7 h  W snapshot_count: 0
id: 7649ce2516e319
( R" s2 S* [1 n6 A block_name_prefix: rbd_data.7649ce2516e319
format: 2
# N/ z/ f  W) K features: layering
op_features:
1 C" s2 p" u& G6 y$ l) a3 W, W5 d flags:
+ O% d0 c1 U' ]. K( R) u- o; b3 |3 H create_timestamp: Tue Dec 21 16:03:06 2021
$ a% n& U1 f' ?; {! j& I access_timestamp: Tue Dec 21 16:03:06 2021
modify_timestamp: Tue Dec 21 16:03:06 2021
parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
overlap: 3 GiB
+ S! M6 V. f! z7 D; e9 Frbd image 'volume-1e7c9937-a00b-411a-b79b-d31d2a37f2cb':
size 300 GiB in 76800 objects
order 22 (4 MiB objects)
7 ?& J  B. K9 y& v. s; k8 j snapshot_count: 0
id: 76c7001d371b6d
block_name_prefix: rbd_data.76c7001d371b6d
format: 2
5 E) e7 _: X! z( x5 t, }- v4 D) u2 E features: layering
) C) r* q+ D: r3 {) N8 z4 r op_features:
flags:
create_timestamp: Tue Dec 21 16:55:37 2021
access_timestamp: Tue Dec 21 16:55:37 2021
0 T; g, D3 l; u) q modify_timestamp: Tue Dec 21 16:55:37 2021
rbd image 'volume-24f9176e-7e23-407e-9e1d-d10598df72e4':
size 50 GiB in 12800 objects
order 22 (4 MiB objects)
: ^8 ~* J6 `- c' Z3 Z8 R- E snapshot_count: 0
  z" \" ~5 g( T  d. |) {0 a) H  z id: 764a9a39902847
block_name_prefix: rbd_data.764a9a39902847
  \3 h0 E/ g" P$ z. Q format: 2
features: layering
  Q+ I; `; |; L op_features:
flags:
create_timestamp: Tue Dec 21 16:03:35 2021
" |: ?/ G' }, p; C7 y* a" K, w" R8 k access_timestamp: Tue Dec 21 16:03:35 2021
7 I# a  v" p) Z. e/ V: g: x) o modify_timestamp: Tue Dec 21 16:03:35 2021
. V+ \5 X0 O: _9 L- C5 V parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
overlap: 3 GiB
rbd image 'volume-297f6c84-8653-4e62-96c1-60bc93ab2d5f':
# ?" }: J$ S4 W5 o3 J/ I5 Y. U size 50 GiB in 12800 objects
order 22 (4 MiB objects)
snapshot_count: 0
! q# h3 X2 w" [' b9 x- H' ~ id: 764e686c9e848a
block_name_prefix: rbd_data.764e686c9e848a
format: 2
features: layering
op_features:
0 z+ t0 e0 B7 k& r# z8 s flags:
create_timestamp: Tue Dec 21 14:25:34 2021
7 _8 b  ^5 m# @) Z access_timestamp: Tue Dec 21 14:25:34 2021
( G5 \* O% F7 m modify_timestamp: Tue Dec 21 14:25:34 2021
parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
overlap: 3 GiB
1 u! N  y. C) O2 d, t/ _/ Zrbd image 'volume-2b0f3d5a-63ee-464e-a5a6-9f1ee639596b':
. |4 J9 l2 x  N5 H- n size 50 GiB in 12800 objects
order 22 (4 MiB objects)
snapshot_count: 0
7 Q7 j! r# `; p9 O- M id: 76839f1e2b2b2b
# D# z7 a; r' X+ [0 C block_name_prefix: rbd_data.76839f1e2b2b2b
- x& F- @! n5 f. A$ v+ ]# Z format: 2
features: layering
op_features:
flags:
, R2 A' E6 n8 I# q. ~3 m3 b6 N create_timestamp: Tue Dec 21 16:03:00 2021
- k) }6 u/ ?7 X, Z( f3 G; v! n& U access_timestamp: Tue Dec 21 16:03:00 2021
! J( I6 F. Y: `# g, b/ l modify_timestamp: Tue Dec 21 16:03:00 2021
parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
overlap: 3 GiB
( ]5 O* q8 p' K/ frbd image 'volume-2c99bf04-bf03-405d-a628-559451192a24':
size 200 GiB in 51200 objects
order 22 (4 MiB objects)
snapshot_count: 0
/ q8 w# T/ Z5 M9 w5 S id: 762c34716910bc
  [) `' S' }. t! R block_name_prefix: rbd_data.762c34716910bc
format: 2
$ L. F: J& [* ?4 Y0 q, ^  N features: layering
op_features:
8 T* i6 [# \' d+ O flags:
9 F2 r# I( }5 ?# \! { create_timestamp: Tue Dec 21 15:07:28 2021
  i7 V- V) y5 `) c' ?. p4 A' j0 [ access_timestamp: Tue Dec 21 15:07:28 2021
! i8 y' u! v+ O' k$ @; L& z modify_timestamp: Tue Dec 21 15:07:28 2021
7 K; H7 \, j" Hrbd image 'volume-33537697-c9c4-47de-8a06-912d35b7a681':
size 50 GiB in 12800 objects
& O" S- }% H7 @0 K order 22 (4 MiB objects)
; ~3 a0 @7 i# \% o% d! q snapshot_count: 0
, Y% ^) v' l" m6 w) H  ~# o( V id: 7649a12f5bd696
9 U5 b, `7 g, }  G2 i6 p& v* N0 s block_name_prefix: rbd_data.7649a12f5bd696
0 p) ]- R, F5 Q9 J1 k format: 2
features: layering
: u$ K9 h9 l4 D7 J  N4 ~( _ op_features:
6 m9 A7 C! @! F# [+ b+ V flags:
create_timestamp: Tue Dec 21 16:02:57 2021
access_timestamp: Tue Dec 21 16:02:57 2021
modify_timestamp: Tue Dec 21 16:02:57 2021
/ S8 n! D  D9 F parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
% {* `3 n! E. W  ?& @" [3 z  ] overlap: 3 GiB
$ |- I3 e9 l7 v) |1 c% k# [rbd image 'volume-3496b392-f1b0-4d04-a1ff-dbe4195ab53d':
# ^! _; M2 l' }) e% ~8 D' n: A size 200 GiB in 51200 objects
order 22 (4 MiB objects)
snapshot_count: 0
id: 762aea3188652e
/ }0 @/ A& y0 A7 P8 T3 C) k6 | block_name_prefix: rbd_data.762aea3188652e
format: 2
8 F2 h+ s* m3 ~5 b features: layering
op_features:
flags:
- i! M" R+ m, T# \. [, |- S create_timestamp: Tue Dec 21 15:05:26 2021
1 |( \$ {" I; ~) z* n7 D4 L access_timestamp: Tue Dec 21 15:05:26 2021
. \1 A6 v) P* a/ S- L modify_timestamp: Tue Dec 21 15:05:26 2021
' z2 q& [* _0 ~. G, \  zrbd image 'volume-3d0f3268-ae7a-4495-9024-c35eae56e408':
. t) P, R' y' y: m3 Q size 50 GiB in 12800 objects
order 22 (4 MiB objects)
snapshot_count: 0
id: 764a102ec950ae
8 I! l9 m+ v  x2 B4 \; b7 \ block_name_prefix: rbd_data.764a102ec950ae
- C: M; }+ X" g% M( k: Q format: 2
! q8 \5 g( x8 _; D$ B9 y/ u features: layering
op_features:
flags:
' u* D# o# c2 j4 _! T* @; h; r create_timestamp: Tue Dec 21 16:03:14 2021
7 h" Q; Y2 R; Q: R9 C access_timestamp: Tue Dec 21 16:03:14 2021
- E2 i* v, h1 V! O8 X modify_timestamp: Tue Dec 21 16:03:14 2021
  b8 a/ P% D5 ?; L6 k parent: images/cf388a13-e476-47eb-8bb8-ef8544cfa8eb@snap
# z) f  c: L- N% r# I overlap: 3 GiB
rbd image 'volume-4292ad38-b702-4efc-8c78-1640ef035dc1':
size 300 GiB in 76800 objects
- S* B' c/ F" E8 ?$ |$ c% H( c order 22 (4 MiB objects)
- G5 W3 K/ S/ v6 P' v5 U# | snapshot_count: 0
9 o; d+ V. n* } id: 76a0221ac5a494
# D  P) \' {; Q block_name_prefix: rbd_data.76a0221ac5a494
format: 2
features: layering
* }& {& n5 o; {  y+ r op_features:
flags:
2 o. b$ p8 o! f2 M, O8 w: y create_timestamp: Tue Dec 21 16:55:29 2021
. Z" {9 I+ ]& Q6 l" y8 V9 E! `/ t access_timestamp: Tue Dec 21 16:55:29 2021
modify_timestamp: Tue Dec 21 16:55:29 2021
( j8 s9 j2 F* T' w# k! q/ {) frbd image 'volume-4462eabd-ca96-49e1-9441-cbdbd3ca5545':
: ?# a3 D' ?$ x- W size 800 GiB in 204800 objects
8 U7 r* d* O5 R: A. c9 ] order 22 (4 MiB objects)
1 J* L, A4 A9 z2 s0 ^ snapshot_count: 0
1 d/ U! J- S+ o$ t) ~4 x id: 7667c83f695d0d
7 J! i) F- @/ S% r8 D3 u block_name_prefix: rbd_data.7667c83f695d0d
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' `2 J  `2 C- b; J; O- Z8 D" x/ g

admin

涉及的nova模块也需要重启。
, K! _$ ]# U$ l9 w1 z% s/ i3 D8 f: \控制节点：
docer restart  nova_api          nova_conductor    nova_consoleauth  nova_novncproxy   nova_scheduler
" n: W! V6 z7 o- S计算节点：
% O) [! n5 d' i, a0 ]2 A5 w  W( Odocer restart  nova_compute  nova_libvirt  nova_ssh

admin

docker restart nova_api nova_conductor nova_consoleauth nova_novncproxy nova_scheduler

admin

docker restart cinder_volume cinder_backup cinder_api cinder_scheduler