[Xen-users] How to install pv guests with tap2:aio for remus

[José Eduardo França <jefranca@xxxxxxxxx>]

Hi Guys,

I'm working with:

1. xen 4.1;
2. dom0 ubuntu kernel 3.2
   

I'm trying to run remus with disk replication (I can run without disk replication). But I read I need to use tap2 <http://nss.cs.ubc.ca/remus/doc.html>.

Well... first I tried to create a pv guest. Then I take this guest.cfg:

1. name = "ubuntu-ha"
2. memory = 256
3. disk = ['tap2:tapdisk:aio:/var/lib/xen/images/ubuntu-ha.img,xvda,w']
4. vif = [' ']
5. kernel = "/var/lib/xen/images/ubuntu-netboot/vmlinuz"
6. ramdisk = "/var/lib/xen/images/ubuntu-netboot/initrd.gz"
7. extra = "debian-installer/exit/always_halt=true -- console=hvc0"
   

And I run "xm console guest.cfg -c" and I get the following error:

• Error: ('create', '-aaio:/var/lib/xen/images/ubuntu-ha.img') failed (55808 blktap kernel module not installed )

Others stuffs:

1. There is 'blktap' in /etc/modules (Is there blktap2 and I must put there?);
2. In line 3, I tried "disk = ['tap2:aio:/var/lib/xen/images/ubuntu-ha.img,xvda,w'] and I got the same error;
3. I also tried "disk = ['tap:aio:/var/lib/xen/images/ubuntu-ha.img,xvda,w']" or  "disk = ['tap:tapdisk:aio:/var/lib/xen/images/ubuntu-ha.img,xvda,w']" and I got the following error in boot: "XENBUS: Waiting for devices to initialise: 295s...290s...285s...280s...". I even can do some steps, but the OS installation advises that no disk drive was detected. I expected this.
4. Could I run remus with disk replication using "disk = ['file:/var/lib/xen/images/ubuntu-ha.img,xvda,w']"? Case yes, how to do this?

Does someone have a suggestion?
Thanks
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