openstack team mailing list archive

[Chuck Short <chuck.short@xxxxxxxxxxxxx>]

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