[Users] Rest-api to fetch the hosts details ( active vm's , CPU , Physical memory etc.)
Michael Pasternak
mpastern at redhat.com
Tue Feb 19 10:26:39 UTC 2013
Hi Romil,
On 02/19/2013 11:22 AM, Romil Gupta wrote:
> Hi Michael ,
>
>
> Thanks for ur continuous help. I have one more query here ....
>
> I want to fetch the host elements like ..
> Type
> address
> status
> No. of CPUs
> cpu->type
> cpu -> name->topology->cores->sockets
> memory
> summary
> version
>
> Is is the correct way of doing to get these details?
>
> hosts=api.hosts.list()
> for host in hosts:
> type=api.hosts.get(host.id <http://host.id>).type
> address=api.hosts.get(host.id <http://host.id>).address
no, please use getter methods instead as they're encapsulating attributes that may be
called differently in python,
for instance 'type' attribute in python renamed to 'type_' cause 'type' is preserved name.
you can see all available get_X() methods by running code bellow:
#> print [token for token in type(host.superclass).__dict__.keys() if token.startswith('get_')]
>
> I got some exception :
> address=api.hosts.get(host.id <http://host.id>).get_address()
> AttributeError: 'NoneType' object has no attribute 'get_address'
this can only happen if your host lookup has failed.
>
>
> Please suggest me the correct way of doing it ....if have referred
> https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Virtualization/3.1/html/Developer_Guide/chap-REST_API_Guide-Hosts.html
>
> Regards,
> Romil
>
>
>
>
>
>
> On Wed, Jan 30, 2013 at 6:50 PM, Michael Pasternak <mpastern at redhat.com <mailto:mpastern at redhat.com>> wrote:
>
> On 01/30/2013 03:09 PM, Romil Gupta wrote:
> > thanks for all your guidance , now I m able to fetch the details of a host using
> > the below script :
> >
> > hosts=api.hosts.list()
> > for host in hosts:
> > print "host name--> %s id--->> %s \n"%(host.name <http://host.name> <http://host.name> , host.id <http://host.id> <http://host.id>)
> > clusterid=api.hosts.get(host.name <http://host.name> <http://host.name>).cluster.id <http://cluster.id> <http://cluster.id>
> > print clusterid
> >
> > hostname=api.hosts.get(host.name <http://host.name> <http://host.name>)
> > statistic=hostname.statistics.list()
> > i=0
> > while i < 14:
> > print statistic[i].name
> > print statistic[i].description
> > print statistic[i].unit
> > print statistic[i].values.value[0].datum
> > i=i+1;
> >
> >
> > summary=api.get_summary()
> > print summary
> >
> > How I can print the summary , its only return the Object??
>
> this is summary object structure:
>
> <summary>
> <vms>
> <total></total>
> <active></active>
> </vms>
> <hosts>
> <total></total>
> <active></active>
> </hosts>
> <users>
> <total></total>
> <active></active>
> </users>
> <storage_domains>
> <total></total>
> <active></active>
> </storage_domains>
> </summary>
>
> you can access properties directly, like this:
> summary.hosts.active
>
> >
> > Thanks,
> > Romil
> >
> >
> > On Wed, Jan 30, 2013 at 4:52 PM, Michael Pasternak <mpastern at redhat.com <mailto:mpastern at redhat.com> <mailto:mpastern at redhat.com <mailto:mpastern at redhat.com>>> wrote:
> >
> >
> > Romil,
> >
> > On 01/30/2013 12:18 PM, Romil Gupta wrote:
> > > Hi,
> > >
> > > Is this is a right way to get it ??
> > >
> > > statistics=params.Host(host.name <http://host.name> <http://host.name> <http://host.name>).get_statistic()
> >
> > 1. first you need to fetch the host to see it's statistics (by doing params.Host(...) you creating
> > host parameters holder which is needed for adding new host to the system)
> >
> > 2. get_x() getters used to access object attributes, while collections are exposed as properties, do
> >
> > 1. myhost = api.hosts.get(name="xxx")
> > 2. myhost.statistics.list()
> > 3. loop over returned collection of statistics to find what you're looking for
> >
> > - note, statistic objects are complex types, you can look for data at:
> >
> > statistics[i].unit // the unit of the holder data
> > statistics[i].values.value[0].datum // actual data
> >
> > > print statistics
> > >
> > > summary=params.Host(host.name <http://host.name> <http://host.name> <http://host.name>).get_summary()
> >
> > summary() is an api method, do:
> >
> > 1. api = API(url='', username='', password='')
> > 2. api.get_summary()
> >
> >
> > > print summary
> > >
> > >
> > > Output is : none
> > >
> > > Thanks
> > > Romil
> > >
> > >
> > > On Wed, Jan 30, 2013 at 2:04 PM, Michael Pasternak <mpastern at redhat.com <mailto:mpastern at redhat.com> <mailto:mpastern at redhat.com <mailto:mpastern at redhat.com>>
> <mailto:mpastern at redhat.com <mailto:mpastern at redhat.com> <mailto:mpastern at redhat.com <mailto:mpastern at redhat.com>>>> wrote:
> > >
> > >
> > > Hi Romil,
> > >
> > > On 01/30/2013 10:17 AM, Romil Gupta wrote:
> > > > Hi all ,
> > > >
> > > > how I can get the hosts details like Active VM's ,
> > >
> > > host doesn't have running vms attribute, instead you
> > > can see in the guest on which host it's running,
> > >
> > > general system summary you can see at api.get_summary()
> > >
> > > Number of CPU's , CPU name , CPU type ,
> > >
> > > these are host attributes
> > >
> > > Physical Memory (used , free ) , swap size and other parameters
> > >
> > > these are host.statistics attributes
> > >
> > > > using ovirt-engine-sdk-3.2.0.5-1.
> > > >
> > > >
> > > >
> > > > Regards,
> > > > Romil
> > > >
> > > > --
> > > > I don't wish to be everything to everyone, but I would like to be something to someone.
> > >
> > >
> > > --
> > >
> > > Michael Pasternak
> > > RedHat, ENG-Virtualization R&D
> > >
> > >
> > >
> > >
> > > --
> > > I don't wish to be everything to everyone, but I would like to be something to someone.
> >
> >
> > --
> >
> > Michael Pasternak
> > RedHat, ENG-Virtualization R&D
> >
> >
> >
> >
> > --
> > I don't wish to be everything to everyone, but I would like to be something to someone.
>
>
> --
>
> Michael Pasternak
> RedHat, ENG-Virtualization R&D
>
>
>
>
> --
> I don't wish to be everything to everyone, but I would like to be something to someone.
--
Michael Pasternak
RedHat, ENG-Virtualization R&D
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