[ovirt-users] Request for oVirt Ansible modules testing feedback
Nathanaël Blanchet
blanchet at abes.fr
Fri Jan 6 13:44:24 UTC 2017
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
More information about the Users
mailing list