Cinder iSACI演示

一 前提

Cinder组件已安装好

二 演示过程

[[email protected] ~(keystone_demo)]# pvdisplay
  --- Physical volume ---
  PV Name               /dev/loop1
  VG Name               cinder-volumes
  PV Size               <20.60 GiB / not usable 2.00 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              5273
  Free PE               4761
  Allocated PE          512
  PV UUID               wU4Frc-i3NL-i301-fA2x-MGXS-uSoz-qQ4zga
   
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               cl
  PV Size               <63.00 GiB / not usable 3.00 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              16127
  Free PE               1
  Allocated PE          16126
  PV UUID               AanOA8-ALkx-A1ai-Yxs0-J3ef-RK3W-2SFYS0
[[email protected] ~(keystone_demo)]# vgdisplay
  --- Volume group ---
  VG Name               cinder-volumes
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  5
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <20.60 GiB
  PE Size               4.00 MiB
  Total PE              5273
  Alloc PE / Size       512 / 2.00 GiB
  Free  PE / Size       4761 / <18.60 GiB
  VG UUID               7eMx7r-cUHy-A2eV-0gMn-DZzc-aVHW-OVxo76
   
  --- Volume group ---
  VG Name               cl
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <63.00 GiB
  PE Size               4.00 MiB
  Total PE              16127
  Alloc PE / Size       16126 / 62.99 GiB
  Free  PE / Size       1 / 4.00 MiB
  VG UUID               FwCUMV-Pezj-0JtC-nRTf-scg0-CH53-lMGEWB

在dashboard删除一个1G的卷后，再次查询，发现Free Size多了1G

[[email protected] ~(keystone_demo)]# vgdisplay
  --- Volume group ---
  VG Name               cinder-volumes
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <20.60 GiB
  PE Size               4.00 MiB
  Total PE              5273
  Alloc PE / Size       256 / 1.00 GiB
  Free  PE / Size       5017 / <19.60 GiB
  VG UUID               7eMx7r-cUHy-A2eV-0gMn-DZzc-aVHW-OVxo76
   
  --- Volume group ---
  VG Name               cl
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <63.00 GiB
  PE Size               4.00 MiB
  Total PE              16127
  Alloc PE / Size       16126 / 62.99 GiB
  Free  PE / Size       1 / 4.00 MiB
  VG UUID               FwCUMV-Pezj-0JtC-nRTf-scg0-CH53-lMGEWB

对应关系如下图所示

将卷挂载到虚拟机上

再查询

[[email protected] nodes(keystone_demo)]# iscsiadm -m discovery -t sendtargets -p 192.168.0.120
192.168.0.120:3260,1 iqn.2010-10.org.openstack:volume-b64fedef-d528-435f-9256-414b44aa9bc5
192.168.0.120:3260,1 iqn.2010-10.org.openstack:volume-7236ed4b-bf0a-423f-bc7a-bb213c0e9853
[[email protected] nodes(keystone_demo)]# cd /dev/disk/by-path/
[[email protected] by-path(keystone_demo)]# ls
ip-192.168.0.120:3260-iscsi-iqn.2010-10.org.openstack:volume-7236ed4b-bf0a-423f-bc7a-bb213c0e9853-lun-0        pci-0000:00:0d.0-ata-1.0
ip-192.168.0.120:3260-iscsi-iqn.2010-10.org.openstack:volume-b64fedef-d528-435f-9256-414b44aa9bc5-lun-0        pci-0000:00:0d.0-ata-1.0-part1
ip-192.168.0.120:3260-iscsi-iqn.2010-10.org.openstack:volume-b64fedef-d528-435f-9256-414b44aa9bc5-lun-0-part1  pci-0000:00:0d.0-ata-1.0-part2
pci-0000:00:01.1-ata-2.0