OperationalError: unable to open database file

Question

Graphite throwing the unable to open database file

tail -f /etc/httpd/logs/error_log 

This is the setting.py file configuration

DATABASES = {
  'default': {
    'NAME': '/opt/graphite/webapp/test.db',
    'ENGINE': 'django.db.backends.sqlite3',
    'USER': '',
    'PASSWORD': '',
    'HOST': '',
    'PORT': ''
  }
}

done

python manage.py  syncdb

The file exists in the below location

[root@bash  graphite]# ls -l /opt/graphite/webapp/test.db
-rw-rw-rw- 1 nobody nobody 65536 Nov 11 22:22 /opt/graphite/webapp/test.db

it throws below error

[Tue Nov 11 22:24:15 2014] [error]   File "/usr/lib/python2.6/site-packages/django/db/backends/util.py", line 53, in execute
[Tue Nov 11 22:24:15 2014] [error]     return self.cursor.execute(sql, params)
[Tue Nov 11 22:24:15 2014] [error]   File "/usr/lib/python2.6/site-packages/django/db/backends/sqlite3/base.py", line 452, in execute
[Tue Nov 11 22:24:15 2014] [error]     return Database.Cursor.execute(self, query, params)
[Tue Nov 11 22:24:15 2014] [error] OperationalError: unable to open database file

Answer 1

Check rights of user, from whom you are executing python manage.py syncdb.

This user must have rights to read and write for file /opt/graphite/webapp/test.db

And also to read, write and execute rights for folder /opt/graphite/webapp/

Try this commands (execute from the user, that starts python manage.py syncdb, probably it is current user)

sudo chown `whoami`:`whoami` /opt/graphite/webapp/test.db  # change owner
sudo chmod o+rw /opt/graphite/webapp/test.db  # add rights

sudo chown `whoami`:`whoami` /opt/graphite/webapp/
sudo chmod o+rwx /opt/graphite/webapp/