Re: [Xen-API] Error when trying to start up a domU

[Stefan Berger <stefanb@xxxxxxxxxx>]

xen-api-bounces@xxxxxxxxxxxxxxxxxxx wrote on 07/10/2007
12:27:24 PM:

> First of all, thanks to Tom for hands on and psychological support
offlist :)
> 
> I have successfully created a local VDI, a VM and a VBD. I am stuck
> with the following error:
> 
> xmlrpc failed! ErrorDescription: coercing to Unicode: need string
or
> buffer, NoneType found -> INTERNAL_ERROR
> 
> 
> Detailed procedure log:
> 
> The constructors used to create the VDI was
> (54b789c9-969a-dee5-32b7-94ea46c61b7b is the local one you can abuse
> to access local files):
> 
> my %vdi_constructor2 = ( 'name_label' => 'generic label',
>                    
    'name_description' => '',
>                    
    'virtual_size' => '4194304000',
>                    
    'SR' => '54b789c9-969a-dee5-32b7-94ea46c61b7b',
>                    
    'other_config' => ('location' =>
> '/root/test_image_070710_15'),
> );
> 
> The VM constructor:
> 
> my %vm_constructor = ( 'name_label'       => '070710_15',
>                    
   'name_description' => 'mein ding halt',
>                    
   'user_version' => '123',
>                    
   'is_a_template' => '0',
>                    
   'auto_power_on' => '0',
>                    
   'memory_static_max'  => '512000000',
>                    
   'memory_static_min'  => '512000000',
>                    
   'memory_dynamic_max' => '512000000',
>                    
   'memory_dynamic_min' => '512000000',
>                    
   'VCPUs_max'        => '1',
>                    
   'VCPUs_at_startup' => '1',
> );


Does this VM start without the VDI/VBD? Can you give
it a ramdisk to start? I would say you have to give it more parameters.

I remember having had similar problem until I specified
action_after_shutdown, actions_after_crash, actions_after_reboot and actions_after_suspend.
 You should give the first 3 a value of '0' and the last one a "destroy"
(might be a bug in the API...). Set PV_bootloader to "", give
it a PV_kernel (the one domain-0 booted with for example including the
whole path, i.e. /boot/vmlinuz-2.6.18) and PV_ramdisk (also the one that
domain-0 booted with).  I set PV_args to "". Once that works
- I hope it does - try to add VBD and VDI...

  Stefan  



> 
> my %vbd_constructor = ( 'VDI' => '844b162a-5a04-c4f9-8196-027de5826c95',
>                    
    'VM'  => 'd4a27090-1205-76f4-06a3-89d23c677adf',
>                    
    'device' => '/dev/sda',
>                    
    'bootable' => '1',
> );
> 
> This results in the following:
> 
> /var/lib/xend/domains/d4a27090-1205-76f4-06a3-89d23c677adf/config.sxp
> 
> (domain
>     (vcpus_params ())
>     (PV_args )
>     (PV_bootloader )
>     (name_description 'mein ding halt')
>     (VCPUs_live 1)
>     (actions_after_crash restart)
>     (uuid d4a27090-1205-76f4-06a3-89d23c677adf)
>     (PV_ramdisk )
>     (name_label 070710_15)
>     (VCPUs_at_startup 1)
>     (HVM_boot_params ())
>     (platform ())
>     (PV_kernel )
>     (memory_static_min 512000000)
>     (HVM_boot_policy )
>     (VCPUs_max 1)
>     (memory_static_max 512000000)
>     (actions_after_shutdown destroy)
>     (memory_dynamic_max 512000000)
>     (user_version 123)
>     (is_a_template False)
>     (memory_dynamic_min 512000000)
>     (PV_bootloader_args )
>     (other_config ())
>     (actions_after_reboot restart)
>     (on_crash restart)
>     (uuid d4a27090-1205-76f4-06a3-89d23c677adf)
>     (bootloader_args )
>     (vcpus 1)
>     (name 070710_15)
>     (on_poweroff destroy)
>     (on_reboot restart)
>     (bootloader )
>     (maxmem 488)
>     (memory 488)
>     (shadow_memory 0)
>     (vcpu_avail 1)
>     (cpu_weight 256)
>     (cpu_cap 0)
>     (features )
>     (on_xend_start ignore)
>     (on_xend_stop ignore)
>     (image (linux (kernel )))
>     (status 0)
>     (device
>         (vbd
>             (uuid d40c4167-c578-4b7c-d5b4-f426460f6c2e)
>             (bootable 1)
>             (driver )
>             (dev /dev/sda:disk)
>             (uname /root/test_image_070710_15)
>             (mode r)
>             (VDI 844b162a-5a04-c4f9-8196-027de5826c95)
>             (type Disk)
>         )
>     )
> )
> 
> 
> When trying to VM.start the machine with
> 
> VM.start, $session_ref, $vm_ref, 0
> 
> I get
> 
> xmlrpc failed! ErrorDescription: coercing to Unicode: need string
or
> buffer, NoneType found -> INTERNAL_ERROR
> 
> xend.log says
> 
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072) XendDomainInfo.
> constructDomain
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072) Balloon: 6994876
KiB
> free; need 2048; done.
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072) Adding Domain: 8
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.initDomain: 8 256
> [2007-07-10 18:18:15 15751] ERROR (__init__:1072) VM start failed
> Traceback (most recent call last):
>   File "//usr/lib/python/xen/xend/XendDomainInfo.py",
line 396, in start
>     XendTask.log_progress(31, 60, self._initDomain)
>   File "//usr/lib/python/xen/xend/XendTask.py", line
209, in log_progress
>     retval = func(*args, **kwds)
>   File "//usr/lib/python/xen/xend/XendDomainInfo.py",
line 1470, in 
> _initDomain
>     self._configureBootloader()
>   File "//usr/lib/python/xen/xend/XendDomainInfo.py",
line 1824, in
> _configureBootloader
>     bootloader_args, kernel, ramdisk, args)
>   File "//usr/lib/python/xen/xend/XendBootloader.py",
line 41, in bootloader
>     if not os.access(disk, os.R_OK):
> TypeError: coercing to Unicode: need string or buffer, NoneType found
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.destroy: domid=8
> [2007-07-10 18:18:15 15751] DEBUG (__init__:1072)
> XendDomainInfo.destroyDomain(8)
> [2007-07-10 18:18:15 15751] ERROR (__init__:1072) Internal error
> handling VM.start
> Traceback (most recent call last):
>   File "//usr/lib/python/xen/util/xmlrpclib2.py", line
131, in
> _marshaled_dispatch
>     response = self._dispatch(method, params)
>   File "SimpleXMLRPCServer.py", line 406, in _dispatch
>     return func(*params)
>   File "//usr/lib/python/xen/xend/XendAPI.py", line
219, in f
>     return func(self, *args, **kwargs)
>   File "//usr/lib/python/xen/xend/XendAPI.py", line
254, in check_session
>     return func(self, session, *args, **kwargs)
>   File "//usr/lib/python/xen/xend/XendAPI.py", line
310, in <lambda>
>     'VM', func, *args, **kwargs)
>   File "//usr/lib/python/xen/xend/XendAPI.py", line
266, in _check_ref
>     return func(api, session, ref, *args, **kwargs)
>   File "//usr/lib/python/xen/xend/XendAPI.py", line
1681, in VM_start
>     start_paused = start_paused)
>   File "//usr/lib/python/xen/xend/XendTask.py", line
209, in log_progress
>     retval = func(*args, **kwds)
>   File "//usr/lib/python/xen/xend/XendAPI.py", line
447, in do_vm_func
>     xendom.do_legacy_api_with_uuid(fn, vm_ref, *args, **kwargs)
>   File "//usr/lib/python/xen/xend/XendDomain.py", line
700, in
> do_legacy_api_with_uuid
>     fn(dom, *args, **kwargs)
>   File "//usr/lib/python/xen/xend/XendDomain.py", line
985, in domain_start
>     dominfo.start(is_managed = True)
>   File "//usr/lib/python/xen/xend/XendDomainInfo.py",
line 396, in start
>     XendTask.log_progress(31, 60, self._initDomain)
>   File "//usr/lib/python/xen/xend/XendTask.py", line
209, in log_progress
>     retval = func(*args, **kwds)
>   File "//usr/lib/python/xen/xend/XendDomainInfo.py",
line 1470, in 
> _initDomain
>     self._configureBootloader()
>   File "//usr/lib/python/xen/xend/XendDomainInfo.py",
line 1824, in
> _configureBootloader
>     bootloader_args, kernel, ramdisk, args)
>   File "//usr/lib/python/xen/xend/XendBootloader.py",
line 41, in bootloader
>     if not os.access(disk, os.R_OK):
> TypeError: coercing to Unicode: need string or buffer, NoneType found
> 
> 
> I have no idea what else I could look at or try. Any help appreciated.
> 
> 
> If you need more info, ask and I will happy to provide it :)
> Richard
> 
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