Problem:
Your Unifi controller running on docker or docker-compose shows log messages like
controller_1 | [2021-12-29 17:37:26,396] <docker-entrypoint> Starting unifi controller service. controller_1 | /usr/local/bin/docker-entrypoint.sh: line 97: /unifi/data/system.properties: Permission denied controller_1 | /usr/local/bin/docker-entrypoint.sh: line 97: /unifi/data/system.properties: Permission denied controller_1 | /usr/local/bin/docker-entrypoint.sh: line 97: /unifi/data/system.properties: Permission denied controller_1 | /usr/local/bin/docker-entrypoint.sh: line 97: /unifi/data/system.properties: Permission denied
on startup.
Solution:
Fix the permissions of the directory mounted. I have listed
volumes: - ./unifi_data:/unifi/data
in my docker-compose.yml.
Fix the permissions by
sudo chown -R 999:999 unifi_data