Re: [HTCondor-users] update node's master ClassAds through Python bindings?

[Iain Bradford Steers <iain.steers@xxxxxxx>]

Hi Thomas,

Is this running on the worker node itself or does it have to be remote?

If itâs local then the following should be enough:

import htcondor
htcondor.param[âMY_VARâ] = 5

Or RemoteParam for remote setting.

However you may be running into a security setting, especially given the remoteparam failure message.

You need to look at the SETTABLE_ATTRS_* config knobs.

Cheers, Iain

> On Aug 15, 2016, at 16:56, Thomas Hartmann <thomas.hartmann@xxxxxxx> wrote:
> 
> Hi all,
> 
> I am trying to modify settable ClassAds on a worker node's master
> through the python bindings. I.e., I would like to do something
> equivalent to
> 
>> condor_config_val -name batch0930.desy.de -master -set
> 'TEST_HOST_STATUS = "preparing"'
>> condor_reconfig -name batch0930.desy.de
> 
> 
> So, I first polled the current ClassAds from the collector for this
> node/master, change the key:value and advertise the updated ad
> 
>>>> batch0930_master =
> collector.query(htcondor.AdTypes.Master,'regexp(".*batch0930\\.desy\\.de",
> Name)')
> # in the end the idea would be a list of masters to loop over...
>>>> batch0930_master[0]['TEST_HOST_STATUS']='testing'
>>>> collector.advertise(batch0930_master[0],command=UPDATE_AD_MASTER)
> 
> which fails with "NameError: name 'UPDATE_AD_MASTER' is not defined" [1]
> 
> ---
> 
> I also tried to follow
> https://lists.cs.wisc.edu/archive/htcondor-users/2015-November/msg00060.shtml
> with
> 
>>>> batch0930_master = collector.locate(htcondor.DaemonTypes.Master,
> "batch0930.desy.de")
> # I assume, that the ClassAds objects are the same either queried with
> locate() or with query() [with the 'right' regexp], or?
>>>> batch0930_master['TEST_HOST_STATUS']='testing'
> 
> # apparently setting a new value before polling the remote parameters
> does not work
> # so I polled the remote parameters and tried to update the
> dict/classad with
> 
>>>> batch0930_params = htcondor.RemoteParam(batch0930_master)
>>>> batch0930_params['TEST_HOST_STATUS']='testing'
> 
> but which fails with
> "RuntimeError: Failed to set remote daemon parameter."
> 
> So, I would be grateful if somebody can help me out on how to properly
> update a worker node's master? ;)
> 
> Cheers and thanks,
>  Thomas
> 
> [1]
> the current documentation is a bit unclear, since the keyword order
> seems to be different for generic 'UPDATE_AD_GENERIC' compared to startd
> daemon 'UPDATE_STARTD_AD' as in
> https://research.cs.wisc.edu/htcondor/manual/latest/6_7Python_Bindings.html
> anyway, I tried both, 'UPDATE_AD_MASTER' and 'UPDATE_MASTER_AD', but
> both are failing with the aforementioned name error
> 
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