daemon change

[Heather Piwowar]

Hi Kevin, 

Could you give me a quick overview of the daemon change please?  I'm having a tough time getting it all to run.

So to use the webapp we can just do

python api.py

whereas to do load_test we also have to do

python runbackend.py 

or now

python totalimpact/backend.py

is that right?

also the provider_text_proxy stuff has daemon abilities now?

load_test is working for you in the master tip, is that right?

thanks in advance for the overview... 

h

[Kevin Campbell]

Heather,

The backend and API are separate processes. You will want to run both of the following:

python totalimpact/backend.py
python totalimpact/api.py

The backend process runs all of the workers for metrics, aliases, etc. You don't need to run these as daemons, that's optional. I've removed runbackend.py now and moved all the code there into totalimpact/backend.py so it's consistent with api.py

I've got some init scripts that handle pid creation, boot up logfiles, etc. which will probably help here. I'll add them in, although we might want to move them later.

load_test is working for me on master, yes, including using the proxy for all of the external requests.

Regards,
Kevin

h

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[Heather Piwowar]

Thanks Kev, helpful.

I have the feeling I'm doing something different than you in trying to run backend.py.

On a fresh clone of master, when I do

python totalimpact/backend.py

I get an error that it doesn't import os

I add import os, then I get an error

Traceback (most recent call last):

  File "totalimpact/backend.py", line 579, in <module>

    context = daemon.DaemonContext()

AttributeError: 'module' object has no attribute 'DaemonContext'

I'm looking into it to see what might the cause of this error... just raising it here because these errors make me want to confirm that I'm doing what you are doing?  

Cheers, 

Heather

[Heather Piwowar]

So no one spends any time trying to figure out this error:  it turns out 

  pip install daemon

installed the wrong library.

  pip install python-daemon 

installed the right one, and the daemon line seems to work.

Now hung up on creating the log file line... seems to be a permission problems on my directories... working on it...

Heather

[Kevin Campbell]

Heather,

Let me push out any changes I have here.

Yes, it's the python-daemon package you'll need here. I've wrapped up the startup into scripts today, which should make this easier for deployment.

Regards,
Kevin

[Heather Piwowar]

Sounds great.  Thanks :)

Heather

[Jason Priem]

Is there a reason why this isn't included with the other dependencies in setup.py?

j

Jason Priem
UNC Royster Scholar
School of Information and Library Science
University of North Carolina at Chapel Hill