Open Stack

Does this cover the scenario of a user launching CentOS 6.x, updating the
kernel, snapshotting, and having the relaunched instance resized?


On Mon, Oct 6, 2014 at 12:38 PM, Regan McDonald <regan at wavefunction.org>
wrote:

> Seconded. This is what I use with my CentOS images, and it works great.
>
>
> On Mon, Oct 6, 2014 at 1:54 PM, Robert Plestenjak <
> robert.plestenjak at xlab.si> wrote:
>
>> Try this:
>>
>> https://github.com/flegmatik/linux-rootfs-resize
>>
>> - Robert
>>
>> ----- Original Message -----
>> From: "Antonio Messina" <antonio.s.messina at gmail.com>
>> To: "Robert van Leeuwen" <Robert.vanLeeuwen at spilgames.com>
>> Cc: openstack-operators at lists.openstack.org
>> Sent: Friday, October 3, 2014 2:50:44 PM
>> Subject: Re: [Openstack-operators] Problem creating resizable CentOS 6.5
>>       image
>>
>> I use this snippet in my %post section. I don't find it particularly
>> elegant, but it works just fine:
>>
>>     # Set up to grow root in initramfs
>>     cat << EOF > 05-grow-root.sh
>>     #!/bin/sh
>>
>>     /bin/echo
>>     /bin/echo Resizing root filesystem
>>
>>     /bin/echo "d
>>     n
>>     p
>>     1
>>
>>
>>     w
>>     " | /sbin/fdisk -c -u /dev/vda
>>     /sbin/e2fsck -f /dev/vda1
>>     /sbin/resize2fs /dev/vda1
>>     EOF
>>
>>     chmod +x 05-grow-root.sh
>>
>>     dracut --force --include 05-grow-root.sh /mount --install 'echo
>> fdisk e2fsck resize2fs' /boot/"initramfs-grow_root-$(ls /boot/|grep
>> initramfs|sed s/initramfs-//g)" $(ls /boot/|grep vmlinuz|sed
>> s/vmlinuz-//g)
>>     rm -f 05-grow-root.sh
>>
>>     tail -4 /boot/grub/grub.conf | sed
>> s/initramfs/initramfs-grow_root/g| sed s/CentOS/ResizePartition/g |
>> sed s/crashkernel=auto/crashkernel=0 at 0/g >> /boot/grub/grub.conf
>>
>> It only works if the root filesystem is `/dev/vd1` (which is a very
>> common setup anyway) but can be adapted.
>>
>> I only tested it with CentOS 5 and 6. The full script is available at
>> https://github.com/gc3-uzh-ch/openstack-tools/
>>
>> .a.
>>
>>
>> --
>> antonio.s.messina at gmail.com
>> antonio.messina at uzh.ch                     +41 (0)44 635 42 22
>> S3IT: Service and Support for Science IT   http://www.s3it.uzh.ch/
>> University of Zurich
>> Winterthurerstrasse 190
>> CH-8057 Zurich Switzerland
>>
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>
>
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