Open Stack

Hi Lorin,

I was working on this the week before last and ran into the same problems
you've described. I was on vacation last week, but before I left, I had a
solution that I'm 99% happy with -- I just need to do some final testing.

Dean Troyer has some great CentOS build scripts
here<https://github.com/dtroyer/image-recipes>.
These scripts will build a CentOS image on the fly from start to finish.
The only issue I ran into was with udev: On first boot, udev will record
the MAC addresses of the virtual NIC(s) in the instance. If you create a
snapshot, these records are not removed and so udev renames the interfaces
to something else.

Here is my fork <https://github.com/jtopjian/image-recipes> of the scripts
which resolves this udev issue.

If you use these scripts, let me know if you run into any issues. I hope to
finish up my testing either this week or next week and finally have a good
(on par with Ubuntu) CentOS cloud image -- even better that it can be
generated on the fly and receive all current updates.

Joe


On Sun, Jun 30, 2013 at 12:46 PM, Lorin Hochstein
<lorin at nimbisservices.com>wrote:

> Robert:
>
> This script doesn't support LVM partitions, does it?
>
> Also, I've discovered that it breaks if there's a /boot partition.
> Apparently, if a boot partition is present then grub prepends a "/boot" to
> the paths for the kernel and ramdisk, and this script also prepends /boot.
>
> Lorin
>
>
> On Tue, Jun 11, 2013 at 8:38 AM, Robert Plestenjak <
> robert.plestenjak at xlab.si> wrote:
>
>> Almost forgot, don't forget to install 'wget' and 'openssh-clients'
>>
>> - Robert
>>
>> ----- Original Message -----
>> From: "Robert Plestenjak" <robert.plestenjak at xlab.si>
>> To: openstack-operators at lists.openstack.org
>> Sent: Tuesday, June 11, 2013 11:35:01 AM
>> Subject: Re: [Openstack-operators] CentOS image
>>
>> Yes, that would be great.
>>
>> You can also create image manually in KVM, until proper tools are ready.
>>
>> 1. create disk image with QCOW2 format
>>
>> qemu-img create -f qcow2 -o preallocation=metadata
>> /extra/libvirt/images/centos-6-cloud.qcow2 2G
>>
>> 2. install centos, I recomend only one partition and no swap (in grizzly,
>> you can set swap size in flavor)
>>
>> virt-install --name=centos-6-cloud --disk
>> path=/extra/libvirt/images/centos-6-cloud.qcow2,format=qcow2 -r 1024
>> --vcpus=1 --hvm -c /extra/iso/CentOS-6.3-x86_64-minimal.iso
>>
>> 3. login into your new image and modify
>> '/etc/sysconfig/network-scripts/ifcfg-eth0' to look like this
>>
>> DEVICE="eth0"
>> BOOTPROTO="dhcp"
>> NM_CONTROLLED="no"
>> ONBOOT="yes"
>> TYPE="Ethernet"
>>
>> 4. add EPEL repository and update OS
>>
>> wget
>> http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
>> rpm -ivh epel-release-6-8.noarch.rpm
>>
>> 5. install cloud-utils and cloud-init
>>
>> yum update
>> yum install cloud-utils, cloud-init
>>
>> 6. Download 'centos-image-mod.sh' and 'init-part' together in same
>> directory, run 'centos-image-mod.sh'. This will modify initrd and grub.conf.
>>
>> 6.1. Edit '/boot/grub/grub.conf', check if everything is OK. Also, may
>> not be a bad idea to set timeout to 0.
>>
>> 7. Delete '/etc/udev/rules.d/70-persistent-net.rules', this will be auto
>> created during boot. Don't forget this, since you won't have functional
>> network when you bring this image up on Openstack.
>>
>> 8. Power down your virtual Centos
>>
>> 9. Compress QCOW2 image with
>>
>> qemu-img convert -c /extra/libvirt/images/centos-6-cloud.qcow2 -O qcow2
>> /tmp/centos.qcow2
>>
>>
>> Image /tmp/centos.qcow2 is now ready for upload to Openstack
>>
>> - Robert
>>
>>
>> On 16 May 2013 21:08, Robert Plestenjak <robert.plestenjak at xlab.si>
>> wrote:
>> > This script will modify initrd for image resize during boot, redirect
>> boot log messages to ttyS0 and set NOOP sceduler. Tested on CentOS 6.3 and
>> 6.4.
>> >
>> > https://github.com/flegmatik/centos-image-resize
>>
>> This would be lovely to integrate into diskimage-builder [as part of a
>> CentOS supporting element].
>>
>> -Rob
>>
>> --
>> Robert Collins <rbtcollins at hp.com>
>> Distinguished Technologist
>> HP Cloud Services
>>
>> _______________________________________________
>> OpenStack-operators mailing list
>> OpenStack-operators at lists.openstack.org
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>>
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>> OpenStack-operators at lists.openstack.org
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>>
>
>
>
> --
> Lorin Hochstein
> Lead Architect - Cloud Services
> Nimbis Services, Inc.
> www.nimbisservices.com
>
> _______________________________________________
> OpenStack-operators mailing list
> OpenStack-operators at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>
>


-- 
Joe Topjian
Systems Architect
Cybera Inc.

www.cybera.ca

Cybera is a not-for-profit organization that works to spur and support
innovation, for the economic benefit of Alberta, through the use
of cyberinfrastructure.
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