Openstack Packstack LVM Thin Provisioning [closed]

asked 2017-08-11 02:22:45 -0600

nursanto gravatar image

I was install openstack rdo all in one, i was set lvm thin and over_subscription_ratio to 20. but why, when i lunch instance with disk 20g for example, disk capacity is reduced by 20g directly..? i think it is still thick provisioning, is any need more configuration??

thank you.

my configuration:

[root@centos-thin ~(keystone_admin)]# pvs
  PV         VG             Fmt  Attr PSize   PFree
  /dev/loop0 cinder-volumes lvm2 a--   20.60g 1012.00m
  /dev/sda2  cl_centos-thin lvm2 a--  199.00g   15.82g
[root@centos-thin ~(keystone_admin)]# vgs
  VG             #PV #LV #SN Attr   VSize   VFree
  cinder-volumes   1   1   0 wz--n-  20.60g 1012.00m
  cl_centos-thin   1   3   0 wz--n- 199.00g   15.82g
[root@centos-thin ~(keystone_admin)]# lvs
  LV                  VG             Attr       LSize   Pool   Origin Data%  Meta%  Move Log Cpy%Sync Convert
  cinder-volumes-pool cinder-volumes twi-a-tz--  19.57g               0.00   0.55
  pool00              cl_centos-thin twi-aotz-- 183.00g               2.96   1.89
  root                cl_centos-thin Vwi-aotz-- 175.12g pool00        3.09
  swap                cl_centos-thin Vwi-aotz--   7.88g pool00        0.00
[root@centos-thin ~(keystone_admin)]#

[root@centos-thin ~(keystone_admin)]# egrep -i "lvm_type|max_over_subscription_ratio" /etc/cinder/cinder.conf | grep -v "#"
max_over_subscription_ratio = 20.0
lvm_type = thin
[root@centos-thin ~(keystone_admin)]#
[root@centos-thin ~(keystone_admin)]# tail /etc/cinder/cinder.conf
#ciphers = <None>

[lvm]
volume_backend_name=lvm
volume_driver=cinder.volume.drivers.lvm.LVMVolumeDriver
iscsi_ip_address=192.168.10.223
iscsi_helper=lioadm
volumes_dir=/var/lib/cinder/volumes
lvm_type = thin
max_over_subscription_ratio = 20.0
[root@centos-thin ~(keystone_admin)]#

Thank you,

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Closed for the following reason question is not relevant or outdated by mary_grace
close date 2018-01-26 20:30:02.289953

Comments

nursanto - are you still running into this issue? if so, please comment with any solutions that you've tried.

mary_grace gravatar imagemary_grace ( 2017-12-14 18:01:56 -0600 )edit

@nursanto - Given that no one's answered this and you haven't followed up with any additional questions or information, I'm closing it out. However, if you're still having trouble, please don't hesitate to open another question!

mary_grace gravatar imagemary_grace ( 2018-01-26 20:29:53 -0600 )edit