Re: [Xen-users] how to migrate pv guest from Xen 4.1.4 -> 4.3.2

[Cyrus Tam <cyrustam@xxxxxxxxx>]

Hi Wei,

thanks for your reply,
I changed the "on_crach=preserve" and xl create -c fc17.cfg
I can see the "pygrub" menu, after the timeout it hang,
then "xl list"

#xl list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0 64859     6     r-----    6441.8
fc17                                        11  4096     1     ---sc-       0.4


# cat xl-fc17.log
Waiting for domain fc17 (domid 11) to die [pid 5420]
Domain 11 has shut down, reason code 3 0x3
Action for shutdown reason code 3 is preserve
Done. Exiting now



Then I tried "unpause" the domU during the pygrub menu

#xl create -c fc17.cfg

# xl list
Name                                        ID   Mem VCPUs      State   Time(s)
fc17                                        12     0     0     --p---       0.0

I can see the pygrub menu, before the pygrun menu timeout, i run "xl
unpause fc17"
then the domU can boot up normally

# xl list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0 64859     6     r-----    6456.1
fc17                                        12  4096     4     -b----      12.9



do you know what is the problem ?

Thank you
Cyrus






On Mon, Apr 14, 2014 at 5:32 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> [...]
>>
>> I using dd to dump the logical volume to new machine, and try to start the
>> domainU, but it crash repeatedly.
>>
>> # cat fc17.cfg
>> name = "fc17"
>> memory = 4096
>> vcpus = 4
>> bootloader = "pygrub"
>> localtime = 0
>> on_poweroff = "destroy"
>> on_reboot = "restart"
>> on_crash = "restart"
>
> You can change on_crash to "preserved" to prevent it from restarting.
>
>> vfb = [ 'type=vnc,vncdisplay=6,vnclisten=0.0.0.0,vncpasswd=password' ]
>> vnc = 1
>> vncunused = 0
>> vncdisplay = 3
>> disk = [ "phy:/dev/vg01/vg01_fc17,xvda,w" ]
>> vif = [ "bridge=xenbrdum,script=vif-bridge" ]
>> parallel = "none"
>> serial = "none"
>>
>>
>>
>> # xl create fc17.cfg
>
> ... and use 'xl create -c fc17.cfg' to connect to DomU to get some
> output.
>
>> Parsing config from fc17.cfg
>> Daemon running with PID 4778
>
> Xen seems to be quite happy about this domain. So I guess this is
> something related to pygrub and guest kernel. Need to get more log.
>
>> #
>>
>>
>>
>> # xl vncviewer fc17
>> fc17 is an invalid domain identifier (rc=-6)
>>
>>
>> # xl list
>> Name ID Mem VCPUs State Time(s)
>> Domain-0 0 81244 6 r----- 1857.5
>> fc17 22 0 0 --p--- 0.0
>>
>> # xl list
>> Name ID Mem VCPUs State Time(s)
>> Domain-0 0 81244 6 r----- 1859.7
>> fc17 22 4096 1 --psc- 0.4
>>
>>
>> # cat qemu-dm-fc17.log
>> domid: 5
>
> I think this is a stale log file. It says domid 5 but 'xl list' says
> domid is 22.
>
>
> Wei.

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