On Tue, May 14, 2013 at 9:06 AM, Chris Bartels <ch...@christopherbartels.com > wrote:
> Hi,**** > > ** ** > > I have questions regarding this part of the Grizzly install guide that’s > up on github:**** > > ** ** > > **· **Finally, don't forget to create a volumegroup and name it > cinder-volumes:**** > > **· **dd if=/dev/zero of=cinder-volumes bs=1 count=0 seek=2G**** > > **· **losetup /dev/loop2 cinder-volumes**** > > **· **fdisk /dev/loop2**** > > **· **#Type in the followings:**** > > **· **n**** > > **· **p**** > > **· **1**** > > **· **ENTER**** > > **· **ENTER**** > > **· **t**** > > **· **8e**** > > **· **w**** > > **· **Proceed to create the physical volume then the volume group: > **** > > **· **pvcreate /dev/loop2**** > > **· **vgcreate cinder-volumes /dev/loop2**** > > *Note:* Beware that this volume group gets lost after a system reboot. > (Click > Here<https://github.com/mseknibilel/OpenStack-Folsom-Install-guide/blob/master/Tricks%26Ideas/load_volume_group_after_system_reboot.rst>to > know how to load it after a reboot) > **** > > ** ** > > First, I don’t know what all those commands are doing, in particular with > the dd stuff, and I’m reluctant to be doing stuff with that which I don’t > understand, so if someone could explain what that’s all about I’d > appreciate it. If that’s how it _*must*_ be done, I’d like to know.**** > > ** ** > > Secondly, I’m wondering if I could make life easier and not have to bother > with the extra stuff regarding making the vg come back after reboot, which > the instructions link to how to do, if I were to simply do the cinder vg > with the installer & install Ubuntu with 100GB (out of 1000GB) of the disk > made available to the guided LVM partitioning during the initial install, > and use the rest as a cinder-volumes vgcreate’d group that gets mounted > normally at each boot like everything else does.**** > > ** ** > > Wouldn’t that work? Seems easier to me.**** > > ** ** > > Please advise.**** > > ** ** > > Thanks,**** > > Chris**** > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > > Hey Chris, What's listed above is standard unix commands to build a loop-back device file that can be used as a Physical Volume to build Volume Groups. To be honest, this isn't really how you should deploy Cinder in a real environment, but it really just for testing and things like Devstack. For a production setup, you'd actually want to have a raw disk or two on the system, add them as an LVM Physical Volume. The create the Volume Group, in other words the only steps you would need are: pvcreate /dev/sdc (or some disk or partition that you have available) vgcreate cinder-volumes /dev/sdc That's about it, that will give you dedicated partitions/volume groups and it will persist over reboots. I'd also suggest you read up a big on LVM to get a better idea of what those commands do and how all of this works. Hope that helps, John
_______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
