[Rdo-list] Automatic resizing of root partitions in RDO Icehouse
Elías David
elias.moreno.tec at gmail.com
Sat May 10 16:58:45 UTC 2014
Hey, thanks! this method indeed worked nicely with CentOS 6.5 image in RDO
Icehouse! :D
I didn't do the puppet part since I've no puppet server to test but it
wasn't needed, also I used virt-sparcify instead of step 13 qemu-image
convert
I also tried the oz-install method but it failed everytime with the
following exception:
"raise oz.OzException.OzException("No disk activity in %d seconds, failing.
%s" % (inactivity_timeout, screenshot_text))"
No matter the install type (url or iso) and didn't matter creating this in
different machines with different specs (more ram, cpu, fast disks...)
Anyhow, thank you all for the help and tips! very appreciated ;)
Any chance to include this method in RDO docs?
On Fri, May 9, 2014 at 8:34 AM, St. George, Allan L. <
ALLAN.L.ST.GEORGE at leidos.com> wrote:
> I'm sure someone could make this better, but this is what I've been using
> and it works well:
>
> V/R,
>
> Allan
>
> 1. Create disk image with QCOW2 format
>
> qemu-img create -f qcow2 /tmp/centos-6.5-working.qcow2 10G
>
> 2. Install CentOS; Install onto a single ext4 partition mounted to “/” (no
> /boot, /swap, etc.)
>
> virt-install --virt-type {kvm or qemu} --name centos-6.5 --ram 1024 \
> --cdrom=/tmp/CentOS-6.5-x86_64-minimal.iso \
> --disk /tmp/centos-6.5-working.qcow2,format=qcow2 \
> --network network=default \
> --graphics vnc,listen=0.0.0.0 --noautoconsole \
> --os-type=linux --os-variant=rhel6
>
> 3. Eject the disk and reboot the virtual machine
>
> virsh attach-disk --type cdrom --mode readonly centos-6.5 "" hdc
> virsh destroy centos-6.5
> virsh start centos-6.5
>
> 4. After reboot, 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"
>
> 5. Add EPEL repository and update OS
>
> rpm -ivh
> http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
> rpm -ivh
> https://yum.puppetlabs.com/el/6/products/x86_64/puppetlabs-release-6-7.noarch.rpm
>
> 6. Update yum and install cloud-init
>
> yum -y update
> yum install cloud-utils cloud-init parted git
> cd /tmp
> git clone https://github.com/flegmatik/linux-rootfs-resize.git (installed
> in place of cloud-initramfs-tools)
> cd linux-rootfs-resize
> ./install
>
> Edit /etc/cloud/cloud.cfg
>
> Add the line:
>
> user: ec2-user
> Under “cloud_init_modules”, add:
> - resolv-conf
>
> 7. Install and configure puppet
>
> yum install puppet
> edit /etc/hosts and add entry for foreman
> edit /etc/puppet/puppet.conf and add the following lines:
>
> [main]
> pluginsync = true
> [agent]
> runinterval=1800
> server = {server.domain}
> chkconfig puppet on
>
> 8. Enable the instance to access the metadata service
>
> echo "NOZEROCONF=yes" >> /etc/sysconfig/network
>
> 9. Configure /etc/ssh/sshd_config
>
> Uncomment the following lines:
>
> PermitRootLogin yes
> PasswordAuthentication yes
>
> 10. Power down your virtual Centos machine
>
> 11. Clean up the virtual machine of MAC address, etc.
>
> virt-sysprep -d centos-6.5
>
> 12. Undefine the libvirt domain
>
> virsh undefine centos-6.5
>
> 13. Compress QCOW2 image with
>
> qemu-img convert -c /tmp/centos-6.5-working.qcow2 -O qcow2
> /tmp/centos.qcow2
>
>
> Image /tmp/centos-6.5.qcow2 is now ready for upload to Openstack
>
>
> -----Original Message-----
> From: Kashyap Chamarthy [mailto:kchamart at redhat.com]
> Sent: Wednesday, May 07, 2014 11:49 PM
> To: St. George, Allan L.
> Cc: rdo-list at redhat.com; Elías David
> Subject: Re: [Rdo-list] Automatic resizing of root partitions in RDO
> Icehouse
>
> On Wed, May 07, 2014 at 02:31:43PM +0000, St. George, Allan L. wrote:
> > I haven’t had the time to work with Icehouse yet, but I have outlined
> > instruction that are used to create Havana CentOS images that resize
> > automatically upon spawning via linux-rootfs-resize.
> >
> > If interested, I’ll forward it along.
>
> That'd be useful. It'd be even better if you could make a quick RDO wiki
> page[1] that'll be indexed by the search engines.
>
>
> [1] http://openstack.redhat.com/
>
> PS: If you're a Markdown user, you can convert Markdown -> WikiMedia (RDO
> uses WikiMedia for wiki) trivially like this:
>
> $ pandoc -f markdown -t Mediawiki foo.md -o foo.wiki
>
> >
> > From: rdo-list-bounces at redhat.com [mailto:rdo-list-bounces at redhat.com]
> > On Behalf Of Elías David Sent: Tuesday, May 06, 2014 12:57 PM To:
> > Kashyap Chamarthy Cc: rdo-list at redhat.com Subject: Re: [Rdo-list]
> > Automatic resizing of root partitions in RDO Icehouse
> >
> >
> > Hi thanks for the answers!
> >
> > But how is the support right now in OpenStack with centos/fedora
> > images regarding the auto resizing during boot? does the disk size set
> > in the flavor is respected or not, or does it work only with fedora
> > and newer kernels than what CentOS uses...things like that is what I'm
> > looking for On May 6, 2014 4:09 AM, "Kashyap Chamarthy"
> > <kchamart at redhat.com<mailto:kchamart at redhat.com>> wrote: On Mon, May
> > 05, 2014 at 10:22:26PM -0430, Elías David wrote:
> > > Hello all,
> > >
> > > I would like to know what's the current state of auto resizing the
> > > root partition in current RDO Icehouse, more specifically, CentOS
> > > and Fedora images.
> > >
> > > I've read many versions of the story so I'm not really sure what
> > > works and what doesn't.
> > >
> > > For instance, I've read that currently, auto resizing of a CentOS
> > > 6.5 image for would require the filesystem to be ext3 and I've also
> > > read that auto resizing currently works only with kernels >= 3.8, so
> > > what's really the deal with this currently?
> > >
> > > Also, it's as simple as having cloud-init, dracut-modules-growroot
> > > and cloud-initramfs-tools installed on the image or are there any
> > > other steps required for the auto resizing to work?
> >
> >
> > I personally find[1] virt-resize (which works the same way on any
> > images) very useful when I'd like to do resizing, as it works
> > consistent well.
> >
> > I just tried on a Fedora 20 qcow2 cloud image with these below four
> > commands and their complete output.
> >
> > 1. Examine the root filesystem size _inside_ the cloud image:
> >
> > $ virt-filesystems --long --all -h -a fedora-latest.x86_64.qcow2
> >
> > Name Type VFS Label MBR Size Parent /dev/sda1
> > filesystem ext4 _/ - 1.9G - /dev/sda1 partition -
> > - 83 1.9G /dev/sda /dev/sda device - - -
> > 2.0G -
> >
> > 2. Create a new qcow2 disk of 10G:
> >
> > $ qemu-img create -f qcow2 -o preallocation=metadata \
> > newdisk.qcow2 10G
> >
> > 3. Perform the resize operation:
> >
> > $ virt-resize --expand /dev/sda1 fedora-latest.x86_64.qcow2 \
> > newdisk.qcow2 Examining fedora-latest.x86_64.qcow2 ... **********
> >
> > Summary of changes:
> >
> > /dev/sda1: This partition will be resized from 1.9G to 10.0G. The
> > filesystem ext4 on /dev/sda1 will be expanded using the
> > 'resize2fs' method.
> >
> > ********** Setting up initial partition table on newdisk.qcow2 ...
> > Copying /dev/sda1 ... 100%
> >
> ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧
> > 00:00 Expanding /dev/sda1 using the 'resize2fs' method ...
> >
> > Resize operation completed with no errors. Before deleting the
> > old disk, carefully check that the resized disk boots and works
> > correctly.
> >
> > 4. Examine the root file system size in the new disk (should reflect
> > correctly):
> >
> > $ virt-filesystems --long --all -h -a newdisk.qcow2 Name
> > Type VFS Label MBR Size Parent /dev/sda1 filesystem
> > ext4 _/ - 10G - /dev/sda1 partition - - 83
> > 10G /dev/sda /dev/sda device - - - 10G -
> >
> >
> > Hope that helps.
> >
> >
> > [1]
> >
> > http://kashyapc.com/2013/04/13/resize-a-fedora-19-guest-with-libguestf
> > s-tools/
> >
> >
> >
> > -- /kashyap
>
> > _______________________________________________
> > Rdo-list mailing list
> > Rdo-list at redhat.com
> > https://www.redhat.com/mailman/listinfo/rdo-list
>
>
> --
> /kashyap
>
--
Elías David.
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