I want Gunicorn to talk with TileStache via WSGI. But when I run this command...
gunicorn "TileStache:WSGITileServer('/var/osm/bright/project/OSMBright4/tilestache.cfg')"
...I get these errors:
2013-03-30 23:02:41 [14300] [INFO] Starting gunicorn 0.17.2
2013-03-30 23:02:41 [14300] [INFO] Listening at: http://127.0.0.1:8000 (14300)
2013-03-30 23:02:41 [14300] [INFO] Using worker: sync
2013-03-30 23:02:41 [14305] [INFO] Booting worker with pid: 14305
Error loading Tilestache config:
2013-03-30 23:02:41 [14305] [ERROR] Exception in worker process:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/gunicorn/arbiter.py", line 485, in spawn_worker
worker.init_process()
File "/usr/local/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 100, in init_process
self.wsgi = self.app.wsgi()
File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/base.py", line 103, in wsgi
self.callable = self.load()
File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 25, in load
return util.import_app(self.app_uri)
File "/usr/local/lib/python2.7/dist-packages/gunicorn/util.py", line 381, in import_app
app = eval(obj, mod.__dict__)
File "<string>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/TileStache/__init__.py", line 373, in __init__
self.config = parseConfigfile(config)
File "/usr/local/lib/python2.7/dist-packages/TileStache/__init__.py", line 166, in parseConfigfile
return Config.buildConfiguration(config_dict, dirpath)
File "/usr/local/lib/python2.7/dist-packages/TileStache/Config.py", line 217, in buildConfiguration
config.layers[name] = _parseConfigfileLayer(layer_dict, config, dirpath)
File "/usr/local/lib/python2.7/dist-packages/TileStache/Config.py", line 441, in _parseConfigfileLayer
layer.provider = _class(layer, **provider_kwargs)
File "/usr/local/lib/python2.7/dist-packages/TileStache/Mapnik.py", line 81, in __init__
engine = mapnik.FontEngine.instance()
NameError: global name 'mapnik' is not defined
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/gunicorn/arbiter.py", line 485, in spawn_worker
worker.init_process()
File "/usr/local/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 100, in init_process
self.wsgi = self.app.wsgi()
File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/base.py", line 103, in wsgi
self.callable = self.load()
File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 25, in load
return util.import_app(self.app_uri)
File "/usr/local/lib/python2.7/dist-packages/gunicorn/util.py", line 381, in import_app
app = eval(obj, mod.__dict__)
File "<string>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/TileStache/__init__.py", line 373, in __init__
self.config = parseConfigfile(config)
File "/usr/local/lib/python2.7/dist-packages/TileStache/__init__.py", line 166, in parseConfigfile
return Config.buildConfiguration(config_dict, dirpath)
File "/usr/local/lib/python2.7/dist-packages/TileStache/Config.py", line 217, in buildConfiguration
config.layers[name] = _parseConfigfileLayer(layer_dict, config, dirpath)
File "/usr/local/lib/python2.7/dist-packages/TileStache/Config.py", line 441, in _parseConfigfileLayer
layer.provider = _class(layer, **provider_kwargs)
File "/usr/local/lib/python2.7/dist-packages/TileStache/Mapnik.py", line 81, in __init__
engine = mapnik.FontEngine.instance()
NameError: global name 'mapnik' is not defined
2013-03-30 23:02:41 [14305] [INFO] Worker exiting (pid: 14305)
2013-03-30 23:02:41 [14300] [INFO] Shutting down: Master
2013-03-30 23:02:41 [14300] [INFO] Reason: Worker failed to boot.
Does anyone know what it means?
Problem solved.
It came up, as Karmel mentioned, that the problem lay in Mapnik and TileStache, and not Gunicorn.
After some research I found out that there has been changes of the python module name through the different versions; it was mapnik until version 2.0 when it changed to mapnik2, and then back to mapnik again at version 2.1. And obviously it appeared that I had installed version 2.0.
I suppose I just could have changed to import mapnik2 in TileStache/mapnik.py, but I thought it would be more future friendly to uninstall Mapnik and then build it from source instead. It took a while, but definitely worth it.
A big thanks to Karmel for putting me at the right track!