Re: [Xen-devel] problem about using xl create to start a domU

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Fri, 6 May 2016, Shannon Zhao wrote:
> On 2016/5/6 16:51, Julien Grall wrote:
> > Hi Shannon,
> > 
> > On 06/05/16 03:33, Shannon Zhao wrote:
> >> Below is the output of xenstore-ls:
> >>
> >> root@genericarmv8:/home# xenstore-ls -f
> >> /tool = ""
> >> /tool/xenstored = ""
> >> /local = ""
> >> /local/domain = ""
> >> /local/domain/0 = ""
> >> /local/domain/0/domid = "0"
> >> /local/domain/0/name = "Domain-0"
> >> /vm = ""
> >> /libxl = ""
> >>
> >> "ps -ef" prints:
> >>
> >> root      1050     1  0 Jul10 ?        00:00:00
> >> /usr/local/sbin/xenstored --pid-file /var/run/xenstored.pid
> >>
> >> root      1135     1  0 Jul10 ?        00:00:00
> >> /usr/local/sbin/xenconsoled --pid-file=/var/run/xenconsoled.pid
> > 
> > This looks good to me. To double check, have you enabled
> > CONFIG_BLKDEV_BACKEND?
> >
> Maybe that's the problem. Just now I tried to use ramdisk instead of
> disk. It can create the domU.
> 
> kernel = "/home/Image"
> ramdisk="/home/guestfs.cpio.gz"
> name = "guest"
> memory = 512
> vcpus = 1
> extra = "console=hvc0 root=/dev/ram ro"
> 
> And I checked that the CONFIG_XEN_BLKDEV_BACKEND is n. Then I select it.
> 
> root@genericarmv8:~# zcat /proc/config.gz | grep BLKDEV
> CONFIG_XEN_BLKDEV_FRONTEND=y
> CONFIG_XEN_BLKDEV_BACKEND=y
> 
> But when I create the domU with disk, it still failed:
> 
> root@genericarmv8:/home# xl create domU.cfg
> Parsing config from domU.cfg
> /etc/xen/scripts/xen-hotplug-common.sh: line 23:
> /var/log/xen/xen-hotplug.log: No such file or directory

It looks like /var/log/xen doesn't exist in your system.


> libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus:
> /etc/xen/scripts/block add [1239] exited with error status 1
> libxl: error: libxl_create.c:1252:domcreate_launch_dm: unable to add
> disk devices
> /etc/xen/scripts/xen-hotplug-common.sh: line 23:
> /var/log/xen/xen-hotplug.log: No such file or directory
> libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus:
> /etc/xen/scripts/block remove [1245] exited with error status 1
> libxl: error: libxl.c:1564:libxl__destroy_domid: non-existant domain 1
> libxl: error: libxl.c:1523:domain_destroy_callback: unable to destroy
> guest with domid 1
> libxl: error: libxl.c:1452:domain_destroy_cb: destruction of domain 1 failed
> 
> root@genericarmv8:/home# cat domU.cfg
> kernel = "/home/Image"
> name = "guest"
> memory = 512
> vcpus = 1
> extra = "console=hvc0 root=/dev/xvda ro"
> disk = [ 'phy:/dev/loop0,xvda,w' ]
> 
> Thanks,
> -- 
> Shannon
> 

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