We have some flows to verify compatibility of Jenkins LTS versions with 
plugins.
E.g. https://github.com/jenkinsci/acceptance-test-harness/

But Libvirt Agent plugin is not included there AFAICT.

So far it is not confirmed whether it is a plugin defect or regression in 
the core. I assume the first options taking my rusty knowledge about this 
part of the codebase. But the issue needs a triage to say for sure.

BR, Oleg

On Tuesday, March 27, 2018 at 2:22:49 PM UTC+2, Glenn Burkhardt wrote:
>
> I've created an issue:  https://issues.jenkins-ci.org/browse/JENKINS-50427
>
> Thanks for your attention.
>
> I understand the attractiveness of plugins, but using them does raise an 
> issue of maintenance and compatibility.  Perhaps the plugins should be 
> included in the build of Jenkins so problems can be identified.  And also, 
> once an incompatibility has been recognized, that the documentation in the 
> wiki could include the latest version of Jenkins with which the plugin is 
> known to work.  In order to reduce the burden on the core maintainers, once 
> an incompatibility is recognized, the plugin could be dropped from the 
> build until interested parties bring it up to rev.
>
>
> On Tuesday, March 27, 2018 at 4:15:13 AM UTC-4, Oleg Nenashev wrote:
>>
>> I doubt that recompiling will help.
>>
>> The problem is with VirtualMachineLauncher. It implements 
>> ComputerLauncher, but it does not contain the requested fields as 
>> described. But I think it does not block VirtualMachineSlaveComputer and 
>> VirtualMachineSlave 
>> from inheriting UI of the standard launcher as you pointed in the code. It 
>> may be a defect in the core, because there are other similar reports. 
>> Obviously the best way would be to just take ownership of the plugin and 
>> facelift it to support Work directories... but it should not break.
>>
>> Could you please create a separate ticket to LibVirt plugin? I will 
>> forward it to my colleagues who may be interested to investigate it
>>
>> I've been trying to do that, but I'm new to Maven, and it's not clear to 
>>> me yet how to force the build to use a more current Jenkins release.
>>>
>>
>>  Unfortunately libvirt Plugin uses an old Parent POM (1.580). In Parent 
>> POM 2.x we have added a support of "jenkins.version" property which allows 
>> building custom Jenkins versions. So you could use Parent POM 3.6 and build 
>> for Jenkins 1.625.3 or 2.107.1 depending on your needs. But the plugin 
>> needs an update to do that.
>>
>>
>> On Monday, March 26, 2018 at 11:39:38 PM UTC+2, Glenn Burkhardt wrote:
>>>
>>> So, how do we get a copy of the libvirt plugin compiled against the 
>>> current Jenkins core code?  It looks like the libvirt plugin was compiled 
>>> against jenkins-core-1.625.3.jar, and the JNLPLauncher class didn't contain 
>>> a "RemotingWorkDirSettings workDirSettings" field at that time.  It might 
>>> be that simply re-compiling against a more current version of core Jenkins 
>>> code will fix it.
>>>
>>> I've been trying to do that, but I'm new to Maven, and it's not clear to 
>>> me yet how to force the build to use a more current Jenkins release.
>>>
>>> Thanks!
>>>
>>> On Saturday, March 24, 2018 at 9:42:57 AM UTC-4, Oleg Nenashev wrote:
>>>>
>>>> The ticket has been created to a wrong component, so it has never been 
>>>> triaged. I will the components.
>>>> From what I see the Libvirt plugin inherits standard Agent's UI, so the 
>>>> new Jenkins core tries to generate JNLP with workDir.
>>>>
>>>> Also, how does one debug a jelly script like "slave-agent.jnlp.jelly"?  
>>>>> I can't find it anywhere in my deployed Jenkins system.
>>>>>
>>>>
>>>> Please see 
>>>> https://wiki.jenkins.io/display/JENKINS/Figuring+out+URL+binding+of+Stapler
>>>>  
>>>>
>>>> On Friday, March 23, 2018 at 6:46:03 PM UTC+1, Glenn Burkhardt wrote:
>>>>>
>>>>> Jenkins ver. 2.108 <https://jenkins.io/>, Libvirt Slaves plugin 1.8.5 
>>>>>
>>>>> I'm trying to get a slave windows client running in a VM under 
>>>>> 'libvirt' to start properly.  I've identified the problem to be the same 
>>>>> as 
>>>>> described in https://issues.jenkins-ci.org/browse/JENKINS-47834.
>>>>> The problem is that the "slave-agent.jnlp" generated by Jenkins omits 
>>>>> the argument for "-workDir" and "-remoteDir".
>>>>>
>>>>> I've been trying to understand how the "slave-agent.jnlp.jelly" script 
>>>>> generates the file, and I suspect that the script and the Libvirt plugin 
>>>>> are out of sync.  In particular, there's a reference in the script to 
>>>>> "launcher.workDirSettings.workDirPath".  But the VirtualMachineLauncher 
>>>>> class defined in the plugin doesn't contain a 'workDirSettings' field.  
>>>>> The delegate does, and the debugger indicates that it's a JNLPLauncher 
>>>>> class.  
>>>>>
>>>>> I see a line in the script that says:
>>>>>
>>>>> <j:set var="launcher" value="${it.delegatedLauncher}"/>
>>>>>
>>>>> Does that somehow get mapped to the delegate field in 
>>>>> the VirtualMachineSlaveComputer class, which is what the 'it' argument 
>>>>> passed to EncryptedSlaveAgentJnlpFile turns out to be.
>>>>>
>>>>> Also, how does one debug a jelly script like 
>>>>> "slave-agent.jnlp.jelly"?  I can't find it anywhere in my deployed 
>>>>> Jenkins 
>>>>> system.
>>>>>
>>>>> Thanks.
>>>>>
>>>>

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