Synology NAS Indicates "Docker container nginx-proxy-manager stopped unexpectedly" on Every Watchtower Upgrade

[barndawgie]

I'm running Docker on my Synology NAS for a bunch of containers. I recently installed Nginx Proxy Manager and unlike all of my other containers, it is telling me "Docker container nginx-proxy-manager stopped unexpectedly" on every upgrade via Watchtower. Watchtower sends a SIGTERM and gives 60s for a container to shut down. There is nothing obvious in the logs - it appears to shut down normally.

Is there something specific about Nginx Proxy Manager shutdown behavior that I need to be aware of/tweak?

[MarkKla]

have you set the restart policy to unless stopped or always?

[barndawgie]

have you set the restart policy to unless stopped or always?

I used --restart unless-stopped on my docker run command.

FWIW, I get the same behavior (i.e. notification of unexpected container stop) if I run docker kill -s SIGTERM nginx-proxy-manager

If it matters, I did enable the HealthCheck per https://nginxproxymanager.com/advanced-config/#docker-healthcheck