Gitlab unhealthy

I am running gitlab in a docker image. After months of working, my container is unhealthy.
Looking for the logs, configuration files I have:

gitlab-shell self-check failed
Gitaly: … Exception: Resource temporarily unavailable - connect(2) for /var/opt/gitlab/redis/redis.socket
Sidekiq: … Running? … no
Try fixing it:
sudo -u git -H RAILS_ENV=production bin/background_jobs start /opt/gitlab/embedded/service/gitlab-rails/bin/background_jobs
For more information see:
doc/install/installation.md in section “Install Init Script”
see log/sidekiq.log for possible errors
Please fix the error above and rerun the checks.

Projects have namespace:
Exception: Resource temporarily unavailable - connect(2) for /var/opt/gitlab/redis/redis.socket
Redis version >= 5.0.0? … Exception: Resource temporarily unavailable - connect(2) for /var/opt/gitlab/redis/redis.socket

How can I make the troubleshooting, I verified the config files and gitlab wiki and found nothing to help.