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

[Cyrus Tam <cyrustam@xxxxxxxxx>]

Hi All,

I have a Fedora 17 running Xen 4.1.4-4 and 5 PV Fedora17 guest, it is running fine,

# xl info
host : xen01
release : 3.3.4-5.fc17.x86_64
version : #1 SMP Mon May 7 17:29:34 UTC 2012
machine : x86_64
nr_cpus : 12
nr_nodes : 1
cores_per_socket : 6
threads_per_core : 2
cpu_mhz : 2000
hw_caps : bfebfbff:2c100800:00000000:00003f40:13bee3ff:00000000:00000001:00000000
virt_caps : hvm hvm_directio
total_memory : 24498
free_memory : 4150
free_cpus : 0
xen_major : 4
xen_minor : 1
xen_extra : .4
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler : credit
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : unavailable
xen_commandline : placeholder dom0_max_vcpus=4 dom0_vcpus_pin
cc_compiler : gcc version 4.7.2 20120921 (Red Hat 4.7.2-2) (GCC)
cc_compile_by : mockbuild
cc_compile_domain : [unknown]
cc_compile_date : Wed Feb 6 21:24:13 UTC 2013
xend_config_format : 4


I have a new machine with more memory and cpu
I installed Fedora 20 host with Xen 4.3.2-1, guest running PV Fedora20 without any problem.

# xl info
host : xen02
release : 3.11.10-301.fc20.x86_64
version : #1 SMP Thu Dec 5 14:01:17 UTC 2013
machine : x86_64
nr_cpus : 32
max_cpu_id : 63
nr_nodes : 2
cores_per_socket : 8
threads_per_core : 2
cpu_mhz : 2194
hw_caps : bfebfbff:2c100800:00000000:00003f00:17bee3ff:00000000:00000001:00000000
virt_caps : hvm hvm_directio
total_memory : 98269
free_memory : 5486
sharing_freed_memory : 0
sharing_used_memory : 0
outstanding_claims : 0
free_cpus : 0
xen_major : 4
xen_minor : 3
xen_extra : .2
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler : credit
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset :
xen_commandline : placeholder dom0_max_vcpus=6 dom0_vcpus_pin
cc_compiler : gcc (GCC) 4.8.2 20131212 (Red Hat 4.8.2-7)
cc_compile_by : mockbuild
cc_compile_domain : [unknown]
cc_compile_date : Tue Feb 18 21:00:14 UTC 2014
xend_config_format : 4


now I want to migrate these five PV FC17 to new machine,

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
>>> 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
Parsing config from fc17.cfg
Daemon running with PID 4778
#



# 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
Warning: vlan 0 is not connected to host network
-videoram option does not work with cirrus vga device model. Videoram set to 4M.
/builddir/build/BUILD/xen-4.3.2/tools/qemu-xen-traditional/hw/xen_blktap.c:628: Init blktap pipes
Could not open /var/run/tap/qemu-read-5
xs_read(): target get error. /local/domain/5/target.


I can open the console sometimes by "xl console fc17" and see the pygrub menu, after I wait for timeout, it tried to boot to PV guest but failed 

it seems crash and restart again 


Am I missing something??

Thanks

Cyrus

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