1. 程式人生 > >沒有未分配空間的centos7上如何模擬出sdb

沒有未分配空間的centos7上如何模擬出sdb

1。起因

有兩臺伺服器分別安裝部署了openstack的管理節點和計算節點,現在想給win7例項額外掛載E盤。

兩臺伺服器安裝系統時都是在配置完boot、swap和root後,將所有剩餘磁碟空間分配給了home。因此沒有剩餘空間建立sdb。

2。解決方案

控制節點上部署cinder,並部署iscsi target,模擬出sdb;

計算節點上安裝LVM作為儲存節點給cinder用,計算節點掛載控制節點上模擬出的sdb;

這樣dashboard上就能建立卷建立雲盤,給win7例項當作E盤使用了。

cinder和LVM的安裝部署見另一個隨筆。本次只描述控制節點上如何部署iscsi target。

3。詳細過程

a)安裝:[[email protected] ~]# yum install targetcli

b)新建資料夾:[[email protected] ~]# mkdir /home/targetdisk

c)執行targetcli,依次執行如下命令建立iSCSI塊裝置:

  [[email protected] ~]# targetcli

  /> cd backstores/fileio/

  /backstores/fileio> create disk01 /home/targetdisk/disk01 40G

  /backstores/fileio> create disk02 /home/targetdisk/disk02 40G

此時進入/home/targetdisk,就能看到兩個大小都是40G的檔案,disk01和disk02

(補充說明:如果如前面所述安裝系統時有未分配的磁碟空間作為sdb,那麼本步驟就不是進入fileio,而是進入block,然後用這個命令來建立塊:create block01 /dev/sdb

d)建立LIO iSCSI目標:

  /> cd iscsi 

  /iscsi> create
  Created target iqn.2003-01.org.linux-iscsi.controller.x8664:sn.f9144284c7ca.
  Created TPG 1.
  Global pref auto_add_default_portal=true
  Created default portal listening on all IPs (0.0.0.0), port 3260.
  /iscsi>

e)建立邏輯單元:

  /iscsi> cd iqn.2003-01.org.linux-iscsi.controller.x8664:sn.f9144284c7ca/

  /iscsi/iqn.20....f9144284c7ca> cd tpg1/luns

  /iscsi/iqn.20...7ca/tpg1/luns> create /backstores/fileio/disk01

  Created LUN 0.

  /iscsi/iqn.20...7ca/tpg1/luns> create /backstores/fileio/disk02

  Created LUN 1.

f)建立網路入口:

  /iscsi/iqn.20.../tpg1/portals> create 10.47.181.26

  Using default IP port 3260
  Could not create NetworkPortal in configFS
  /iscsi/iqn.20.../tpg1/portals> ls
  o- portals ............................................................................................................ [Portals: 1]
  o- 0.0.0.0:3260 ............................................................................................................. [OK]

  /iscsi/iqn.20.../tpg1/portals> delete 0.0.0.0 3260
  Deleted network portal 0.0.0.0:3260
  /iscsi/iqn.20.../tpg1/portals> create 10.47.181.26
  Using default IP port 3260
  Created network portal 10.47.181.26:3260.

g)建立訪問控制列表:

  /iscsi/iqn.20.../tpg1/portals> cd ../acls
  /iscsi/iqn.20...7ca/tpg1/acls> ls
  o- acls .................................................................................................................. [ACLs: 0]
  /iscsi/iqn.20...7ca/tpg1/acls> create iqn.1994-05.com.redhat:91a579c4e39 (create後面的內容為何是這樣的還不清楚,後面再研究)
  Created Node ACL for iqn.1994-05.com.redhat:91a579c4e39
  Created mapped LUN 1.
  Created mapped LUN 0.

h)完成目標建立:

  /> ls
  o- / ......................................................................................................................... [...]
  o- backstores .............................................................................................................. [...]
  | o- block .................................................................................................. [Storage Objects: 0]
  | o- fileio ................................................................................................. [Storage Objects: 2]
  | | o- disk01 ........................................................... [/home/targetdisk/disk01 (40.0GiB) write-back  activated]
  | | | o- alua ................................................................................................... [ALUA Groups: 1]
  | | | o- default_tg_pt_gp ....................................................................... [ALUA state: Active/optimized]
  | | o- disk02 ........................................................... [/home/targetdisk/disk02 (40.0GiB) write-back activated]
  | | o- alua ................................................................................................... [ALUA Groups: 1]
  | | o- default_tg_pt_gp ....................................................................... [ALUA state: Active/optimized]
  | o- pscsi .................................................................................................. [Storage Objects: 0]
  | o- ramdisk ................................................................................................ [Storage Objects: 0]
  o- iscsi ............................................................................................................ [Targets: 1]
  | o- iqn.2003-01.org.linux-iscsi.controller.x8664:sn.f9144284c7ca ...................................................... [TPGs: 1]
  | o- tpg1 ............................................................................................... [no-gen-acls, no-auth]
  | o- acls .......................................................................................................... [ACLs: 1]
  | | o- iqn.1994-05.com.redhat:91a579c4e39 ................................................................... [Mapped  LUNs: 2]
  | | o- mapped_lun0 ............................................................................... [lun0 fileio/disk01 (rw)]
  | | o- mapped_lun1 ............................................................................... [lun1 fileio/disk02 (rw)]
  | o- luns .......................................................................................................... [LUNs: 2]
  | | o- lun0 ..................................................... [fileio/disk01 (/home/targetdisk/disk01) (default_tg_pt_gp)]
  | | o- lun1 ..................................................... [fileio/disk02 (/home/targetdisk/disk02) (default_tg_pt_gp)]
  | o- portals .................................................................................................... [Portals: 1]
  | o- 10.47.181.26:3260 ................................................................................................ [OK]
  o- loopback ......................................................................................................... [Targets: 0]

i)設定認證憑證:

  /> cd iscsi/
  /iscsi> cd iqn.2003-01.org.linux-iscsi.controller.x8664:sn.f9144284c7ca/
  /iscsi/iqn.20....f9144284c7ca> cd tpg1/
  /iscsi/iqn.20...4284c7ca/tpg1> cd acls/iqn.1994-05.com.redhat:91a579c4e39/
  /iscsi/iqn.20...t:91a579c4e39> set auth userid=IncomingUser
  Parameter userid is now 'IncomingUser'.
  /iscsi/iqn.20...t:91a579c4e39> set auth password=SomePassword
  Parameter password is now 'SomePassword'.
  /iscsi/iqn.20...t:91a579c4e39> set auth mutual_userid=OutgoingUser
  Parameter mutual_userid is now 'OutgoingUser'.
  /iscsi/iqn.20...t:91a579c4e39> set auth mutual_password=AnotherPassword
  Parameter mutual_password is now 'AnotherPassword'.

下面開始配置計算節點(即合一的儲存節點)

a)配置:[[email protected] ~]# vi /etc/iscsi/iscsid.conf

  node.session.auth.authmethod = CHAP
  node.session.auth.username = IncomingUser
  node.session.auth.password = SomePassword
  node.session.auth.username_in = OutgoingUser
  node.session.auth.password_in = AnotherPassword