new Jenkins VM in PHX lab

[Nadav Goldin]

>
> You forgot the 1st thing we told you - "don't create partitions on the
> disk"...
> Instead the whole disk '/dev/vdX' should be formatted as a PV, then you can
> grow it from the engine and then 'pvresize' followed by 'lvresize'.


I didn't forget, I came across [1] which quotes [2] and [3] saying
best-practice is to create a partition on the PV:

> *Not Recommended*
>
> Using the whole disk as a PV (as opposed to a partition spanning the whole
> disk) is not recommended because of the management issues it can create.
> Any other OS that looks at the disk will not recognize the LVM metadata and
> display the disk as being free, so it is likely it will be overwritten. LVM
> itself will work fine with whole disk PVs.
>
although I am no expert in lvm so if we agree its ok, no problem, I'll
change it.

[1]
http://unix.stackexchange.com/questions/76588/what-is-the-best-practice-for-adding-disks-in-lvm
[2] http://tldp.org/HOWTO/LVM-HOWTO/initdisks.html
[3]
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Logical_Volume_Manager_Administration/LVM_components.html#multiple_partitions


On Wed, Feb 10, 2016 at 11:02 AM, Barak Korren <bkorren at redhat.com> wrote:

> > able to do "live" storage incrase by adding a new volume to the LVM
> group in
> > the following procedure:
> >
> >  created new virtio volume in the VM from phx-engine
> >  fdisk /dev/vdd then: n -> p -> 1 -> enter -> enter -> t -> 8e -> w
> >  vgextend jenkins_lvm /dev/vdd1
> >  lvextend /dev/mapper/jenkins_lvm-data -L28G
> >  xfs_growfs /dev/mapper/jenkins_lvm-data
> >
> > I was unable to increase the volume size from the engine, and then
> increase
> > the partition size(only create a new partition on the same volume with
> the
> > new increased space in the volume), not sure if that is possible.
> >
> You forgot the 1st thing we told you - "don't create partitions on the
> disk"...
> Instead the whole disk '/dev/vdX' should be formatted as a PV, then you can
> grow it from the engine and then 'pvresize' followed by 'lvresize'.
>
>
> --
> Barak Korren
> bkorren at redhat.com
> RHEV-CI Team
>
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