[GeoNode-users] GeoNode2.8.0 installed from source Thumbnails Error

Fri Jun 8 13:26:18 PDT 2018

Dear Toni Schonbuchner and GeoNode developers,

First of all, my apologies to bring this topic back to discussion. I had
already started with Toni, as shown in the message bellow.

I am digging into GeoNode scripts architecture trying to find an issue
related to the creation of thumbnails. Let me introduce to you what I have
done so far.

I have GeoNode at 2.8.0. installed in a virtualenv according to
http://docs.geonode.org/en/master/tutorials/install_and_
admin/geonode_install/index.html. The thumbnails created by loading data
from GeoNode interface do not work at all.

They are displayed if and only if I upload the layers from GeoServer
interface and in a next step, run python manage.py updatelayers. It is very
interesting what happens here: after running updatelayers, if I go to
GeoNode interface, I see the thumbnail perfectly fine, but doing a right
click over it and copy image location, the response is an OWS url as I am
showing bellow. However If a make a request to the database,
get_thumbnail_url, the response is a http://localhost:8000/. Why port 8000?
Sorry to use this expression, this port 8000 is a nightmare, and I am
digging deep trying to find its source.

If I remove port 8000, the thumbnails work like a charm in port 80.

After following all Toni's recommendations [1] [2] and [3] (please, see the
message right in the bottom of this e-mail), I could not find port 8000
source. It is in somewhere, and I will keep looking for its source in
GeoNode scripts.

A brilliant idea came out. Let's compare GeoNode at 2.8.0 stable installed via
apt-get with GeoNode at 2.8.0 installed from source in a python virtualenv. I
am going through GeoServer data path,  settings.py and local_settings.py,
[1], helpers.py [2], and signals.py[3]. I am not sure that is a brilliant
idea to find port 8000, my nightmare, but I found another issue in respect
to GeoNode apt-get. This issue tells me that port 8000 is not the only one,
there is another problem related to thumbnails that occurs either in
GeoNode at 2.8.0 installed from source  and GeoNode at 2.8.0 installed via
apt-get when updating thumbnails in GeoNode interface and I am showing it
bellow:

*GeoNode installed from source in a virtualenv*

*Thumbnail created by loading data from GeoNode Interface*

*Does not work at all*

$ sudo geonode shell

>>> from geonode.layers.models import Layer
>>> layer = Layer.objects.all()
>>> for tn in layer:
...     print tn.get_thumbnail_url()
...
http://localhost:8000/uploaded/thumbs/layer-d3b7e06c-6b4a-11e8-a4cc-
0800277e2fd3-thumb.png

*NOTE:* The nightmare is here: port 8000. Why? I have set
geoserver_location and geoserver_public_ location to port 8080. And there
is proxy reverse in geonode.conf to port 80.

*Thumbnail created by loading data from GeoServer Interface*

*Does not work at all *

>>> from geonode.layers.models import Layer
>>> layer = Layer.objects.all()
>>> for tn in layer:
...     print tn.get_thumbnail_url()
...
http://localhost:8000/uploaded/thumbs/layer-cfe8a292-80d4-4c59-bff5-
2c2245f15caf-thumb.png
<http://localhost/uploaded/thumbs/layer-2524c8db-726e-4050-9689-055dc0bb9aaa-thumb.png>

*NOTE:*The nightmare is here: port 8000. Why? I have set geoserver_location
and geoserver_public_ location to port 8080. And there is proxy reverse in
geonode.conf to port 80.

<http://localhost/uploaded/thumbs/layer-2524c8db-726e-4050-9689-055dc0bb9aaa-thumb.png>
*HOWEVER: *after running updatelayers for the first time without updating
the thumbnail, there is a light at the end of the tunnel.

*Thumbnails are displayed. *

*Right Click over thumbnail --> Copy image Location*

A OWS url appears
*:*

http://localhost:8080/geoserver/ows?layers=geonode:
GPS&crs=EPSG:4326&service=WMS&format=image/png8&request=
GetMap&height=150&width=200&version=1.1.1&bbox=-69.935496180600000,-29.
789445458300000,-35.777101013900000,0.047035064700000

Why these urls patterns are different? One uses GeoServer, but the other do
not.

*Now, let's edit this layer (zoom in / zoom out) and Set Thumbnails *

*Layer --> Edit Layer --> Zoom in or Zoom out --> Set Thumbnails*

Thumbnails url (http://localhost/uploaded/thumbs/layer-2524c8db-726e-4050-
9689-055dc0bb9aaa-thumb.png) does not work properly.

*Error message:*
The image 'http://localhost/uploaded/thumbs/layer-2524c8db-726e-4050-
9689-055dc0bb9aaa-thumb.png' cannot be displayed because it contains errors.

*CONCLUSION GEONODE INSTALLED BY SOURCE:* There are two issues: *port 8000*
and *thumbnails update.*

*GEONODE INSTALLED VIA APT-GET *

Thumbnail created by loading data from GeoNode Interface

*Works like a charm *

$ sudo geonode shell

>>> from geonode.layers.models import Layer
>>> layer = Layer.objects.all()
>>> for tn in layer:
...     print tn.get_thumbnail_url()
...
http://localhost/uploaded/thumbs/layer-f519c8d4-6b35-11e8-
90e2-080027ac8c10-thumb.png

*Now, let's edit this layer (zoom in / zoom out) and Set Thumbnail*

*Layer --> Edit Layer --> Zoom in or Zoom out --> Set Thumbnails*

Thumbnail url (http://localhost/uploaded/thumbs/layer-a7c6035e-6b49-11e8-
90e2-080027ac8c10-thumb.png) does not work properly.

*Error message:*
The image 'http://localhost/uploaded/thumbs/layer-a7c6035e-6b49-11e8-
90e2-080027ac8c10-thumb.png' cannot be displayed because it contains errors.

*Thumbnail created by loading data from GeoServer Interface*

Works like a charm

>>> from geonode.layers.models import Layer
>>> layer = Layer.objects.all()
>>> for tn in layer:
...     print tn.get_thumbnail_url()
...
http://localhost/uploaded/thumbs/layer-2524c8db-726e-4050-
9689-055dc0bb9aaa-thumb.png

*Right Click over thumbnail blank image --> Copy image Location*

http://localhost/geoserver/ows?layers=geonode:RBMC&crs=EPSG:
4326&service=WMS&format=image/png8&request=GetMap&height=
150&width=200&version=1.1.1&bbox=-64.706650088900000,-31.8
02449444400000,-35.777101013900000,0.047035064700000

*Now, let's edit this layer (zoom in / zoom out) and Set Thumbnails *

*Layer --> Edit Layer --> Zoom in or Zoom out --> Set Thumbnails*

Thumbnails url (http://localhost/uploaded/thumbs/layer-2524c8db-726e-4050-
9689-055dc0bb9aaa-thumb.png) does not work properly.

*Error message:*
The image 'http://localhost/uploaded/thumbs/layer-2524c8db-726e-4050-
9689-055dc0bb9aaa-thumb.png' cannot be displayed because it contains errors.

*CONCLUSION GEONODE INSTALLED VIA APT-GET:* There is only one issue:
*Thumbnails
update.*

As I said above, I do not know if it is a good idea, but I will keep
comparing [1] [2] and [3] in GeoNode apt-get and GeoNode virtualenv in
order to find port 8000 source. However the issue related to updating
GeoNode thumbnails  I have no clue.

Sorry for this long e-mail. Thank you for your time in advance. I
appreciated your help and attention.

Dear Julierme,

I think  using grep does not really help to get insights.
Why not look at the code? The geoserver URL is composed
in settings.py [1]. I think here you will find your 8000.

Next I think the best way to see what´s going on is to have
a look at the helpers.py [2]. Here you should find the code which
is responsible for creating thumbnails and here [3] the signal
which you see in stdout logging. If there is some time I will
do a dev installation and will test it as well.

Further you´ve asked if there is something like geonode-updateip
for an installation by source? Not that I know of but yes it would be
helpful.
But it should not be to hard to write a little script which does the job.
Have a look what geonode-updateip actually does [4] it programatically
changes
the parts which the documentation [5] explains regarding auth.

I hope this helps a bit.
Best greetings to Brasilia!

Toni

[1] https://github.com/GeoNode/geonode/blob/2.8.0/geonode/settings.py#L650
[2] https://github.com/GeoNode/geonode/blob/master/geonode/g
eoserver/helpers.py#L1730
[3] https://github.com/GeoNode/geonode/blob/df12893ced001973
bd748f86d08fa6ae4c10dde9/geonode/geoserver/signals.py#L497
[4] https://github.com/GeoNode/geonode/blob/df12893ced001973
bd748f86d08fa6ae4c10dde9/package/support/geonode.updateip#L126
[5] http://docs.geonode.org/en/master/tutorials/install_and_
admin/geonode_install/install_geoserver_application.html#geo
node-authentication-integration
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