[ovirt-users] Request for oVirt Ansible modules testing feedback
Nathanaël Blanchet
blanchet at abes.fr
Fri Jan 6 13:51:19 UTC 2017
There was a last error in the script :
snap_service = snaps_service.snapshot_service(snap.id) instead of
snap_service = snaps_service.snap_service(snap.id)
For those who are interested in using a full remove_vm_snapshot working
script:
# Create the connection to the server:
connection = sdk.Connection(
url='https://engine/ovirt-engine/api',
username='admin at internal',
password='passwd',
# ca_file='ca.pem',
insecure=True,
debug=True,
log=logging.getLogger(),
)
# Locate the virtual machines service and use it to find the virtual
# machine:
vms_service = connection.system_service().vms_service()
vm = vms_service.list(search='name=myvm')[0]
# Locate the service that manages the snapshots of the virtual machine:
vm_service = vms_service.vm_service(vm.id)
snaps_service = vm_service.snapshots_service()
snaps = snaps_service.list()
snap = [s for s in snaps if s.description == 'My snapshot2'][0]
# Remove the snapshot:
snap_service = snaps_service.snapshot_service(snap.id)
snap_service.remove()
# Close the connection to the server:
connection.close()
Le 06/01/2017 à 14:44, Nathanaël Blanchet a écrit :
>
>
> Le 06/01/2017 à 13:39, Juan Hernández a écrit :
>> On 01/06/2017 12:20 PM, Nathanaël Blanchet wrote:
>>>
>>> Le 04/01/2017 à 18:55, Juan Hernández a écrit :
>>>> On 01/04/2017 05:38 PM, Nathanaël Blanchet wrote:
>>>>> Le 04/01/2017 à 15:41, Juan Hernández a écrit :
>>>>>> On 01/04/2017 12:30 PM, Yaniv Kaul wrote:
>>>>>>> On Wed, Jan 4, 2017 at 1:04 PM, Nicolas Ecarnot
>>>>>>> <nicolas at ecarnot.net
>>>>>>> <mailto:nicolas at ecarnot.net>> wrote:
>>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>> Le 04/01/2017 à 11:49, Nathanaël Blanchet a écrit :
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Le 04/01/2017 à 10:09, Andrea Ghelardi a écrit :
>>>>>>>
>>>>>>>
>>>>>>> Personally I don’t think ansible and ovirt-shell are
>>>>>>> mutually exclusive.
>>>>>>>
>>>>>>> Those who are in ansible and devops realms are not
>>>>>>> really
>>>>>>> scared by
>>>>>>> making python/ansible work with ovirt.
>>>>>>>
>>>>>>> From what I gather, playbooks are quite a de-facto
>>>>>>> pre-requisite to
>>>>>>> build up a real SaaC “Software as a Code”
>>>>>>> environment.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On the other hand, ovirt-shell can and is a
>>>>>>> fast/easy
>>>>>>> way to
>>>>>>> perform
>>>>>>> “normal daily tasks”.
>>>>>>>
>>>>>>> totally agree but ovirt-shell is deprecated in 4.1 et
>>>>>>> will be
>>>>>>> removed in
>>>>>>> 4.2. Ansible or sdk4 are proposed as an alternative.
>>>>>>>
>>>>>>>
>>>>>>> Could someone point me to an URL where sdk4 is fully
>>>>>>> documented, as
>>>>>>> I have to get ready for ovirt-shell deprecation?
>>>>>>>
>>>>>>>
>>>>>>> The Rest API is partially documented under
>>>>>>> https://<engine>/api/model .
>>>>>>> It's not complete yet. All new features in 4.0 are documented and
>>>>>>> we are
>>>>>>> working on the 'older' features now.
>>>>>>> (contributions are welcome!)
>>>>>>>
>>>>>>>
>>>>>>> I'm sure no one at Redhat thought about deprecating a
>>>>>>> tool in
>>>>>>> favor
>>>>>>> of a new one before providing a complete user doc!
>>>>>>>
>>>>>>>
>>>>>>> In addition, the SDK RPM itself contains many examples. See [1].
>>>>>>> (contributions are welcome!)
>>>>>>>
>>>>>>> Y.
>>>>>>>
>>>>>>> [1]
>>>>>>> https://github.com/oVirt/ovirt-engine-sdk/tree/master/sdk/examples
>>>>>>>
>>>>> Although these examples, I can successfully create a snapshot, but I
>>>>> didn't find the way to delete it...
>>>>> Regarding many example, it should be possible to locate any
>>>>> service by :
>>>>> name_service = connection.system_service().name.service()
>>>>>
>>>>> So logically it should be doable with snapshot like
>>>>> snapshots_service = connection.system_service().snapshots.service()
>>>>> but : AttributeError: 'SystemService' object has no attribute
>>>>> 'snapshots
>>>>>
>>>> In the SDK the services are arranged in a tree structure that
>>>> mimics the
>>>> URL structure of the API. For example, if you want to get the service
>>>> that manages a particular snapshot, in the API you would use an URL
>>>> like
>>>> this:
>>>>
>>>> /ovirt-engine/api/vms/123/snapshots/456
>>>>
>>>> In the Python SDK that translates into this:
>>>>
>>>> snap_service = connection.system_service() \
>>>> .vms_service() \
>>>> .vm_service('123') \
>>>> .snapshots_service() \
>>>> .snapshot_service('456')
>>>>
>>>> There is also a generic "service" method that is useful when you
>>>> already
>>>> have all that path as an string:
>>>>
>>>> snap_service = connection.service("vms/123/snapshots/456")
>>>>
>>>> Both return exactly the same object. The first is usually better when
>>>> you are calculating the path of the object step by step, and I
>>>> generally
>>>> prefer it as it is less error prone.
>>>>
>>>> Once you have the reference to the service, you can use the 'remove'
>>>> method:
>>>>
>>>> snap_service.remove()
>>>>
>>>> If you need to search by the names of the objects, then you can use
>>>> the
>>>> 'search' methods, which are only available for the top level objects,
>>>> like VM, data centers, clusters, etc. For example, to find your
>>>> virtual
>>>> machine and then the snapshot:
>>>>
>>>> # Get the root service:
>>>> system_service = connection.system_service()
>>>>
>>>> # Find the virtual machine:
>>>> vms_service = system_service.vms_service()
>>>> vm = vms_service.list(search='name=myvm')[0]
>>>>
>>>> # Find the snapshot:
>>>> vm_service = vms_service.vm_service(vm.id)
>>>> snaps_service = vm_service.snapshots_service()
>>>> snaps = snaps_service.list()
>>>> snap = [s for s in snaps where s.description == 'My snap'][0]
>>> sounds good, thank so much for taking time to explain, but for the last
>>> entry, I get ;
>>>
>>> snap = [s for s in snaps where s.description == 'My snapshot2'][0]
>>> ^
>>> SyntaxError: invalid syntax
>> I apologize, I wrote that too fast. That is SQL syntax, not Python. In
>> python should be "if" instead of "where":
>>
>> snap = [s for s in snaps if s.description == 'My snapshot2'][0]
> Thank you, it's ok for now.
>>
>>> May I use a version 3 of python?
>> You SDK supports both Python 2 and Python 3. If you are using the RPMs
>> make sure to install the 'python3-ovirt-engine-sdk4' package.
>
> python3-ovirt-engine-sdk4 doesn't exist in repos, only
> python-ovirt-engine-sdk4
> Thanks to your explanations, I begin to understand the philosophy of
> this sdk, it's far different from sdk3.
> What's was wrong with the v3, what was the motivation to write a new
> version?
> Will it be possible to use the old sdk3 (manually installed) for old
> scripts in ovirt 4.2 ?
>
>>
>> Note that both are supported, but Python 3 doesn't get a lot of
>> attention yet, so you may find issues. If you find any issue with Python
>> 3 let as know, as we are committed to make it work.
>>
>>>> # Remove the snapshot:
>>>> snap_service = snaps_service.snap_service(snap.id)
>>>> snap_service.remove()
>>>>
>>>>> I saw an example into the ansible [ working ] way to do the same
>>>>> thing
>>>>> and I found this :
>>>>> snapshot =
>>>>> snapshots_service.snapshot_service(module.params['snapshot_id']).get()
>>>>>
>>>>>
>>>>> How can I get this working with sdk, I mean giving snapshot_id as a
>>>>> parameter?
>>>>>
>>>>>
>>>>>> Also the complete reference documentation of the Python SDK is
>>>>>> available
>>>>>> here:
>>>>>>
>>>>>> http://ovirt.github.io/ovirt-engine-sdk/v4.0/4.0.3/index.html
>>>>>>
>>>>>> There also SDKs for Ruby and Java, in case Python is not your
>>>>>> preferred
>>>>>> language:
>>>>>>
>>>>>> Ruby:
>>>>>> https://github.com/oVirt/ovirt-engine-sdk-ruby/tree/master/sdk
>>>>>> https://github.com/oVirt/ovirt-engine-sdk-ruby/tree/master/sdk/examples
>>>>>>
>>>>>> http://www.rubydoc.info/gems/ovirt-engine-sdk
>>>>>>
>>>>>> Java:
>>>>>> https://github.com/oVirt/ovirt-engine-sdk-java/tree/master/sdk
>>>>>>
>>>>>> https://github.com/oVirt/ovirt-engine-sdk-java/tree/master/sdk/src/test/java/org/ovirt/engine/sdk4/examples
>>>>>>
>>>>>>
>>>>>>
>>>>>> http://www.javadoc.io/doc/org.ovirt.engine.api/sdk
>>>>>>
>>>>>>> --
>>>>>>> Nicolas ECARNOT
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Users mailing list
>>>>>>> Users at ovirt.org <mailto:Users at ovirt.org>
>>>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>>> <http://lists.ovirt.org/mailman/listinfo/users>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Users mailing list
>>>>>>> Users at ovirt.org
>>>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>>>
>>>>>> _______________________________________________
>>>>>> Users mailing list
>>>>>> Users at ovirt.org
>>>>>> http://lists.ovirt.org/mailman/listinfo/users
>
--
Nathanaël Blanchet
Supervision réseau
Pôle Infrastrutures Informatiques
227 avenue Professeur-Jean-Louis-Viala
34193 MONTPELLIER CEDEX 5
Tél. 33 (0)4 67 54 84 55
Fax 33 (0)4 67 54 84 14
blanchet at abes.fr
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