Re: [Xen-API] Accessing xentore data created by VM.add_to_xenstore_data

[Marco Sinhoreli <msinhore@xxxxxxxxx>]

I tried the code below and the data isn't created in xenstore:

<code>
VM.add_to_xenstore_data(vm_ref, 'data/description', description)
</code>

In Host, I checked the vmid to use in xenstore in guest shell:

<host_shell>
 # xl list
xen-vmd24                                   18  1024     6        r--      9.2
</host_shell>

And also I checked the xenstore-data vm-params:

<host_shell>
# xe vm-param-get uuid=9b6f6aec-5be0-54cf-077f-131cd8a49d5a
param-name=xenstore-data
data/description: data of description
</host_shell>

Checking if the data was write in xenstore and is available to read in VM:

<vm_shell>
l# xenstore-list /local/domain/18/data
meminfo_total
meminfo_free
os_name
os_majorver
os_minorver
os_uname
os_distro
updated
</vm_shell>


Some idea how can I use this feature?


Cheers


On Wed, Jul 13, 2011 at 7:15 PM, George Shuklin
<george.shuklin@xxxxxxxxx> wrote:
> Use relative paths inside VM.
>
> For example:
>
> xenstore-write data/foo bar
> xenstore-ls data
>
> PS If you are using XCP, dig into xe guest tools, they do many operations
> with xenstore from guest machine from shell scripts.
>
>
>
> On 14.07.2011 02:00, Marco Sinhoreli wrote:
>>
>> Hi George:
>>
>> I don't want to access the data from host, my interest is access this
>> from VM shell as I explained in last mail.
>>
>> Cheers,
>>
>> On Wed, Jul 13, 2011 at 6:50 PM, George Shuklin
>> <george.shuklin@xxxxxxxxx> Âwrote:
>>>
>>> We now using libxs to access xenstore directly on host.
>>>
>>> xapi is not very reliable way to get this access (f.e. if master is down,
>>> centralized access is unavailable, but xenstore on hosts still works
>>> fine),
>>> and not very fast, actually.
>>>
>>> On 14.07.2011 00:04, Marco Sinhoreli wrote:
>>>>
>>>> Hello all:
>>>>
>>>> I'm trying to access the data stored in xenstore using the xenapi and
>>>> it isn't available to read into VM. In VM creation, I used:
>>>> VM.add_to_xenstore_data(vm_ref, 'key', 'value')
>>>>
>>>> Consulting the xenstore-data in cli return this:
>>>> xe vm-param-get param-name=xenstore-data
>>>> uuid=723831a7-b9f6-f3ff-f4df-7462e3a9c8e5
>>>> key: value
>>>>
>>>> Where is the path to access this data into VM?
>>>>
>>>> Cheers,
>>>>
>>>>
>>> _______________________________________________
>>> xen-api mailing list
>>> xen-api@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/mailman/listinfo/xen-api
>>>
>>
>>
>



-- 
Marco Sinhoreli

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