Blank Webpage after Production Installation

[Keyur Joshi]

Hi!
I did the production install of Canvas.
When I try to access the site, I get a blank page. The Canvas icon is visible next to the URL, but the page is blank.
I tried accessing the .html files in /var/canvas/public such as 404.html, as well as the .ico files like favicon.ico. I am able to do so, so I assume the apache server is running.
The 404.html file contains a link called 'login'. When I follow the link I again get a blank page.

Here is the output of ls in /var/canvas/public:

404.html               dimdim_welcome.html     facebook_success.html  font                        media_record          stylesheets_compiled
422.html               doc                     favicon-green.ico      ie-8-is-not-supported.html  optimized
500.html               drawing.html            favicon.ico            images                      partials
assets                 enable-javascript.html  favicon-yellow.ico     javascripts                 robots.txt
blank_submission.html  equella_cancel.html     find.png               loading_submission.html     simple_response.json
_crossdomain.xml       equella_success.html    flash                  locales                     stylesheets

It seems that some files are missing. Please help.

[Rob Orton]

Did you compile assets?

Try to run the following commands from the canvas directory. 

npm install

bundle exec rake canvas:compile_assets

I would also check through the production install guide. https://github.com/instructure/canvas-lms/wiki/Production-Start

-Rob

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[Keyur Joshi]

I did that. I followed the guide till the end of 'configure canvas with apache'. Then I started the website using the instructions at the bottom.

[Graham Ballantyne]

What are your logs telling you (both Apache and canvas (canvas/logs/production.log))?

— Graham

[Keyur Joshi]

There is a lot of stuff in both logs. What in particular should I be looking for?

[Graham Ballantyne]

Error messages, stack traces. Tail the logs (tail -f) while loading your page and see what comes up. 

Also, passenger is installed and running, right? What does passenger-status output?

— Graham

[Keyur Joshi]

Here is the error in production.log:

NoMethodError (undefined method `file_namespace' for nil:NilClass):
  app/middleware/load_account.rb:36:in `configure_for_root_account'
  app/middleware/load_account.rb:9:in `call'
  app/middleware/request_context_generator.rb:34:in `call'
  app/middleware/prevent_non_multipart_parse.rb:32:in `call'

and

  /var/canvas/lib/host_url.rb:78:in `file_host_with_shard'
  /var/canvas/lib/host_url.rb:84:in `file_host'
  /var/canvas/lib/host_url.rb:115:in `is_file_host?'
  /var/canvas/lib/authentication_methods.rb:89:in `masked_authenticity_token'
  /var/canvas/lib/authentication_methods.rb:97:in `load_user'

passenger-status output:

Version : 4.0.37
Date    : 2015-02-19 21:34:13 +0530
Instance: 30607
----------- General information -----------
Max pool size : 6
Processes     : 1
Requests in top-level queue : 0

----------- Application groups -----------
/var/canvas#default:
  App root: /var/canvas
  Requests in queue: 0
  * PID: 31521   Sessions: 0       Processed: 5       Uptime: 1h 11m 58s
    CPU: 0%      Memory  : 322M    Last used: 3m 18s a

The actual error messages much larger, I posted what I thought are the relevant portions.

[Keyur Joshi]

Sorry, I accidentally cut one of the error messages:

NoMethodError (undefined method `id' for nil:NilClass):
  /var/canvas/lib/host_url.rb:78:in `file_host_with_shard'
  /var/canvas/lib/host_url.rb:84:in `file_host'

  /var/canvas/lib/host_url.rb:115:in `is_file_host?'
  /var/canvas/lib/authentication_methods.rb:89:in `masked_authenticity_token'
  /var/canvas/lib/authentication_methods.rb:97:in `load_user'

[Pascal Martineau]

I have the exact same problem on my production setup. One time the problem was a missing "config/file_store.yml" file, but today I got the same error when reinitializing the database.
It seems like the account #1 is not created and that's why #{account.id} is undefined.

[Pascal Martineau]

Turns out adding ssl: "true" to config/domain.yml fixed the problem. My docker container sits behind a proxy with letsencrypt.