KVM block live migration
- Thread starter FinnTux
- Start date
Excellent.
How about templates? Would be great to have ability to create a VM, install and configure operating system and then make template out of it.
VM snapshots would also be great but I guess clvm don't support it?
this process also depends on the guest system so its not that clear. for OpenVZ, you already have such templates, for KVM we plan to support ovf format (but not for 2.0, later).
yes, depends on the disk/storage type. therefore this topic is not for the first 2.0 stable.
For KVM i guess you would need the ability to mount the disk image (ie detect partitions contained within whole disk images) and then modify certain files...
Not sure if OVF has the capability to configure the image on the fly, which is really whats required to deploy templates... At the very least you need to set IP, hostname and user/root passwords.
Perhaps define a template format which includes filesystem images, a script and a manifest... You create the disk image, populate it with a partition table (using user specified sizes for all the mountpoints defined in the manifest, plus swap), run resize2fs or appropriate command to expand the templates to fill the created partitions, you then run the script telling it where the filesystems are and it creates a proper fstab, sets user passwords and configures the network.
Have actually been looking into this myself but the current stumbling block is mounting filesystems inside of a full disk image, when the kernel wont parse the partition table.
Not sure if OVF has the capability to configure the image on the fly, which is really whats required to deploy templates... At the very least you need to set IP, hostname and user/root passwords.
Perhaps define a template format which includes filesystem images, a script and a manifest... You create the disk image, populate it with a partition table (using user specified sizes for all the mountpoints defined in the manifest, plus swap), run resize2fs or appropriate command to expand the templates to fill the created partitions, you then run the script telling it where the filesystems are and it creates a proper fstab, sets user passwords and configures the network.
Have actually been looking into this myself but the current stumbling block is mounting filesystems inside of a full disk image, when the kernel wont parse the partition table.
Tom, yes I know OpenVZ has templates and I meant KVM VMs. Should've mentioned that clearer.
I was actually thinking something much simpler. Just a pre-installed image which is copied to create new VM. IPs etc would be set manually after first boot. Of course this can be done manually "behind the scenes" of web UI.
kpartx?
I was actually thinking something much simpler. Just a pre-installed image which is copied to create new VM. IPs etc would be set manually after first boot. Of course this can be done manually "behind the scenes" of web UI.
kpartx?