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Message #01877
Re: booting from volume
On Sun, 17 Apr 2011 01:48:49 +0900
Isaku Yamahata <yamahata@xxxxxxxxxxxxx> wrote:
> Hi. I've implemented the basic support for boot from volume
> and uploaded lp:~yamahata/nova/boot-from-volume
> blue print:
> https://blueprints.launchpad.net/nova/+spec/boot-from-volume
> Adam Johnson, do you have any progress?
>
> With the patches, VM can boot with a attached partion based on volume
> (including root partition). For example,
> euca-run-instances ami-XXXX -k mykey -t m1.tiny \
> --block-device-mapping /dev/vda=vol-00000001::false \
> --block-device-mapping /dev/vdb=vol-00000002::false
>
> Although EBS manual syas that snapshot should be specified to,
> I chose to volume id because creating snapshot/volume from
> snapshot/volume isn't supported yet. They are proposed as
> https://blueprints.launchpad.net/nova/+spec/snapshot-volume
> https://blueprints.launchpad.net/nova/+spec/clone-volume
>
> My next step is to add ephemeral device and no device support
> and ami support. Comments?
>
> thanks,
>
> Note:
> For --block-device-mapping options support,
> you need latest euca2ools, latest boto which requires python 2.7 or
> later and the following patch
>
> --- euca2ools/commands/eucacommand.py 2011-04-11 13:23:49 +0000
> +++ euca2ools/commands/eucacommand.py 2011-04-16 02:11:12 +0000
> @@ -571,19 +571,23 @@
> return file_path
>
> def parse_block_device_args(self, block_device_maps_args):
> - block_device_map = BlockDeviceMapping()
> + block_device_map =
> boto.ec2.blockdevicemapping.BlockDeviceMapping() for
> block_device_map_arg in block_device_maps_args: parts =
> block_device_map_arg.split('=') if len(parts) > 1:
> device_name = parts[0]
> - block_dev_type = BlockDeviceType()
> + block_dev_type =
> boto.ec2.blockdevicemapping.BlockDeviceType() value_parts =
> parts[1].split(':') if value_parts[0].startswith('snap'):
> block_dev_type.snapshot_id = value_parts[0]
> + elif value_parts[0].startswith('vol-'):
> + # openstack doesn't support volume snapshot at
> the moment
> + # So use volume for now instead of snapshot
> + block_dev_type.snapshot_id = value_parts[0]
> else:
> if value_parts[0].startswith('ephemeral'):
> block_dev_type.ephemeral_name =
> value_parts[0]
> - if len(value_parts) > 1:
> + if len(value_parts) > 1 and value_parts[1] != '':
> block_dev_type.size = int(value_parts[1])
> if len(value_parts) > 2:
> if value_parts[2] == 'true':
>
>
>
Hi,
Thanks for doing this. This is something that our users would love to
have I think. I proposed a similar specification for the design summit
would you like to work together?
Regards
chuck
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