Frequently Asked Questions¶
- In my startup logs I see ‘Aborting… Lemur cannot locate db encryption key, is LEMUR_ENCRYPTION_KEYS set?’
- You likely have not correctly configured LEMUR_ENCRYPTION_KEYS. See Configuration for more information.
- Ensure that you are placing include mime.types; to your Nginx static file location. See Production for example configurations.
- After installing Lemur I am unable to login
- Ensure that you are trying to login with the credentials you entered during lemur init. These are separate from the postgres database credentials.
- Running ‘lemur db upgrade’ seems stuck.
Most likely, the upgrade is stuck because an existing query on the database is holding onto a lock that the migration needs.
To resolve, login to your lemur database and run:SELECT * FROM pg_locks l INNER JOIN pg_stat_activity s ON (l.pid = s.pid) WHERE waiting AND NOT granted;
This will give you a list of queries that are currently waiting to be executed. From there attempt to idenity the PID of the query blocking the migration. Once found execute:select pg_terminate_backend(<blocking-pid>);
How do I¶
- … script the Lemur installation to bootstrap things like roles and users?
Lemur is a simple Flask (Python) application that runs using a utility runner. A script that creates a project and default user might look something like this:
# Bootstrap the Flask environment from flask import current_app from lemur.users.service import create as create_user from lemur.roles.service import create as create_role from lemur.accounts.service import create as create_account role = create_role('aRole', 'this is a new role') create_user('admin', 'password', 'lemur@nobody', True, [role]