O049、准备 LVM Volume Provider

参考https://www.cnblogs.com/CloudMan6/p/5597790.html

 

Cinder 真正负责volume 管理的组件是 volume provider 。Cinder 支持多种 volume provider ，LVM 是默认的volume provider。DevStack 安装之后， /etc/cinder/cinder.conf 已经配置好了LVM。

 

[root@DevStack-Rocky-Controller-31 ~]# cat /etc/cinder/cinder.conf

 

[DEFAULT]

 

default_volume_type = lvmdriver-1

enabled_backends = lvmdriver-1

 

[lvmdriver-1]

image_volume_cache_enabled = True

volume_clear = zero

lvm_type = auto

target_helper = lioadm

volume_group = stack-volumes-lvmdriver-1

volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver

volume_backend_name = lvmdriver-1

 

上面的配置定义了名为 lvmdriver-1 的 volume provider，也称作 back-end。其driver 是LVM，LVM的volume group 名为 stack-volumes-lvmdriver-1 。DevStack 部署 rocky版本的OpenStack 已经帮我们都配置好了。

 

[root@DevStack-Rocky-Compute-12 lvm]# vgdisplay

  --- Volume group ---

  VG Name               stack-volumes-default

  System ID             

  Format                lvm2

  Metadata Areas        1

  Metadata Sequence No  1

  VG Access             read/write

  VG Status             resizable

  MAX LV                0

  Cur LV                0

  Open LV               0

  Max PV                0

  Cur PV                1

  Act PV                1

  VG Size               <24.00 GiB

  PE Size               4.00 MiB

  Total PE              6143

  Alloc PE / Size       0 / 0   

  Free  PE / Size       6143 / <24.00 GiB

  VG UUID               5IdgWN-YX3V-rxNR-08SG-OjDw-M9xS-al102A

   

  --- Volume group ---

  VG Name               centos

  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               <159.00 GiB

  PE Size               4.00 MiB

  Total PE              40703

  Alloc PE / Size       40702 / 158.99 GiB

  Free  PE / Size       1 / 4.00 MiB

  VG UUID               O7gUtM-Ef0y-XsZ0-trOc-fpWX-uYcc-pefodm

   

  --- Volume group ---

  VG Name               stack-volumes-lvmdriver-1

  System ID             

  Format                lvm2

  Metadata Areas        1

  Metadata Sequence No  4

  VG Access             read/write

  VG Status             resizable

  MAX LV                0

  Cur LV                1

  Open LV               0

  Max PV                0

  Cur PV                1

  Act PV                1

  VG Size               <24.00 GiB

  PE Size               4.00 MiB

  Total PE              6143

  Alloc PE / Size       5849 / <22.85 GiB

  Free  PE / Size       294 / <1.15 GiB

  VG UUID               5RFdup-8ta0-QsOv-t42v-bAOa-oaX9-gLSPla

   

 

 

后面各小节都将以 LVM 为 volume provider 详细介绍 volume的 各种操作。