Well the code to generate diagnostics under xen is in
nova/virt/xenapi/vm_utils.py:
887 def compile_diagnostics(cls, session, record):
888 """Compile VM diagnostics data"""
889 try:
890 host = session.get_xenapi_host()
891 host_ip = session.call_xenapi("host.get_record",
host)["address"]
892 except (cls.XenAPI.Failure, KeyError) as e:
893 return {"Unable to retrieve diagnostics": e}
894
895 try:
896 diags = {}
897 xml = get_rrd(host_ip, record["uuid"])
898 if xml:
899 rrd = minidom.parseString(xml)
900 for i, node in enumerate(rrd.firstChild.childNodes):
901 # We don't want all of the extra garbage
902 if i >= 3 and i <= 11:
903 ref = node.childNodes
904 # Name and Value
905 if len(ref) > 6:
906 diags[ref[0].firstChild.data] = \
907 ref[6].firstChild.data
908 return diags
909 except cls.XenAPI.Failure as e:
910 return {"Unable to retrieve diagnostics": e}
911
Example RRD is here: http://community.citrix.com/display/xs/Using+XenServer+RRDs
Perhaps someone could paste the actual data from an install running xen so we
can see what the extracted data looks like?
Then it is as easy as adding a call like the following to
nova/virt/libvirt/connection.py:
def get_diagnostics(self, instance_name):
# look up the domain by instance name
virt_dom = self._lookup_by_name(instance_name)
# get info from the domain using libvirt calls
# map the data into the proper dictionary format
# return the data
return diag
Vish
On Jan 26, 2012, at 2:56 AM, Leander Bessa wrote:
> Could you give me some references on how i could implement the diagnostics
> call for kvm/libvirt?
>
> Regards,
>
> Leander
>
> On Wed, Jan 25, 2012 at 7:39 PM, Vishvananda Ishaya <[email protected]>
> wrote:
> There are currently no plans for such of thing. It seems easier to rely on
> existing plugins for monitoring. That said, it shouldn't be too hard to
> implement the diagnostics call for kvm/libvirt if someone wants to tackle it.
>
> Vish
>
> On Jan 25, 2012, at 8:21 AM, Leander Bessa wrote:
>
>> Are there any plans to add support for monitoring instances which run
>> libvirt? Does XEN also use libvirt?
>>
>> On Wed, Jan 25, 2012 at 2:01 PM, Leander Bessa <[email protected]> wrote:
>> Ok i'll look into that, thank you for the answers.
>>
>> Regards,
>>
>> Leander
>>
>>
>> On Tue, Jan 24, 2012 at 11:16 PM, Vishvananda Ishaya <[email protected]>
>> wrote:
>> Monitoring can be done through libvirt monitoring plugins. For example:
>>
>> http://honk.sigxcpu.org/projects/libvirt/
>>
>> Vish
>>
>> On Jan 24, 2012, at 2:01 PM, Leander Bessa wrote:
>>
>>> How exactly do i install that particular extension and what can i use as an
>>> alternative to monitor instances with KVM?
>>>
>>>
>>> On Tue, Jan 24, 2012 at 6:11 PM, Kiall Mac Innes <[email protected]> wrote:
>>> I've just verified this against my install, but since the diagnostics is
>>> unsupported when using libvirt/kvm, it still errors out (but with a 500,
>>> rather than 404)
>>>
>>> Thanks,
>>> Kiall
>>>
>>>
>>>
>>> On Tue, Jan 24, 2012 at 5:56 PM, Brian Waldon <[email protected]>
>>> wrote:
>>> Actually the diagnostics command was not added in Essex, but it was
>>> converted to a true extension. However it is part of the Admin API, which
>>> means for Diablo you need to set the allow_admin_api flag on your nova-api
>>> node.
>>>
>>>
>>> On Jan 24, 2012, at 9:41 AM, Kiall Mac Innes wrote:
>>>
>>>> Hi,
>>>>
>>>> The diagnostics command was added in Essex, my packages are using the
>>>> stable Diablo version.
>>>>
>>>> Novaclient sadly shows these options even though they can't be used with
>>>> Diablo.
>>>>
>>>> Kiall
>>>>
>>>> Sent from my mobile - Sorry for being short.
>>>>
>>>> On Jan 24, 2012 5:04 p.m., "Leander Bessa" <[email protected]> wrote:
>>>> Hello,
>>>>
>>>> I've setup a single node configuration with keystone using the packages
>>>> from https://launchpad.net/~managedit/+archive/openstack.
>>>>
>>>> I've managed to launch an instance, however when i run the commando nova
>>>> diagnostics <server> i get this:
>>>>
>>>> REQ: curl -i http://127.0.0.1:5000/tokens -X POST -H "Content-Type:
>>>> application/json" -H "User-Agent: python-novaclient"
>>>>
>>>> REQ BODY: {"auth": {"tenantName": "admin", "passwordCredentials":
>>>> {"username": "admin", "password": "admin"}}}
>>>>
>>>> RESP:{'date': 'Tue, 24 Jan 2012 16:56:24 GMT', 'status': '200',
>>>> 'content-length': '1119', 'content-type': 'application/json;
>>>> charset=UTF-8'} {"access": {"token": {"expires": "2015-02-05T00:00:00",
>>>> "id": "999888777666", "tenant": {"id": "1", "name": "admin"}},
>>>> "serviceCatalog": [{"endpoints": [{"adminURL":
>>>> "http://127.0.0.1:8774/v1.1/1";, "region": "RegionOne", "internalURL":
>>>> "http://127.0.0.1:8774/v1.1/1";, "publicURL":
>>>> "http://127.0.0.1:8774/v1.1/1"}], "type": "compute", "name": "nova"},
>>>> {"endpoints": [{"adminURL": "http://127.0.0.1:8774/v1.0";, "region":
>>>> "RegionOne", "internalURL": "http://127.0.0.1:8774/v1.0";, "publicURL":
>>>> "http://127.0.0.1:8774/v1.0/"}], "type": "compute", "name":
>>>> "nova_compat"}, {"endpoints": [{"adminURL":
>>>> "http://127.0.0.1:9292/v1.1/1";, "region": "RegionOne", "internalURL":
>>>> "http://127.0.0.1:9292/v1.1/1";, "publicURL":
>>>> "http://127.0.0.1:9292/v1.1/1"}], "type": "image", "name": "glance"},
>>>> {"endpoints": [{"adminURL": "http://127.0.0.1:35357/v2.0";, "region":
>>>> "RegionOne", "internalURL": "http://127.0.0.1:5000/v2.0";, "publicURL":
>>>> "http://127.0.0.1:5000/v2.0"}], "type": "identity", "name": "identity"}],
>>>> "user": {"id": "1", "roles": [{"tenantId": "1", "id": "1", "name":
>>>> "Admin"}, {"id": "1", "name": "Admin"}], "name": "admin"}}}
>>>>
>>>> REQ: curl -i http://127.0.0.1:8774/v1.1/1/servers/3/diagnostics -X GET -H
>>>> "X-Auth-Project-Id: admin" -H "User-Agent: python-novaclient" -H
>>>> "X-Auth-Token: 999888777666"
>>>>
>>>> REQ: curl -i http://127.0.0.1:8774/v1.1/1/servers/3/diagnostics -X GET -H
>>>> "X-Auth-Project-Id: admin" -H "User-Agent: python-novaclient" -H
>>>> "X-Auth-Token: 999888777666"
>>>>
>>>> RESP:{'date': 'Tue, 24 Jan 2012 16:56:24 GMT', 'status': '404',
>>>> 'content-length': '52', 'content-type': 'text/plain; charset=UTF-8'} 404
>>>> Not Found
>>>>
>>>> The resource could not be found.
>>>>
>>>>
>>>>
>>>> RESP:{'date': 'Tue, 24 Jan 2012 16:56:24 GMT', 'status': '404',
>>>> 'content-length': '52', 'content-type': 'text/plain; charset=UTF-8'} 404
>>>> Not Found
>>>>
>>>> The resource could not be found.
>>>>
>>>>
>>>> n/a (HTTP 404)
>>>>
>>>>
>>>> Any ideas?
>>>>
>>>> Regards,
>>>>
>>>> Leander
>>>>
>>>> _______________________________________________
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>>>>
>>>> _______________________________________________
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>>>
>>>
>>>
>>> _______________________________________________
>>> Mailing list: https://launchpad.net/~openstack
>>> Post to : [email protected]
>>> Unsubscribe : https://launchpad.net/~openstack
>>> More help : https://help.launchpad.net/ListHelp
>>
>>
>>
>
>
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