Description Finn David 2024-12-19 12:14:55 CET

# Environment
UCS: 5.0-9 errata1188
Installed: cups=2.2.1 samba4=4.16 self-service=5.0 squid=3.5 ucsschool=5.0 v6 ucsschool-veyon-proxy=4.9.0.8-ucs1


# Problem
The Veyon container (4.9.0.8-ucs1) does reproducible run into a dead lock. Veyon version 4.9.1.12 is released (https://hub.docker.com/layers/veyon/webapi-proxy/4.9.1.12/images/sha256-7a297b81e5e121a5dd98d781f6de07b765129ca4577093788e0650658c67a2c9), fixing this issue. But as of now we haven't released an update, because it needs further testing.


# Workaround
In the meantime, you can apply the following health check for the container:

ucr set appcenter/apps/ucsschool-veyon-proxy/docker/params='--restart unless-stopped --health-cmd="timeout --kill-after=1 0.5 bash -c \"echo -n 2>/dev/null < /dev/tcp/127.0.0.1/11080\" || kill $(pidof veyon-cli)" --health-interval=2s --health-retries=1 --health-start-period=10s' && univention-app reinitialize ucsschool-veyon-proxy

Every 2 seconds a connection to the localhost is established via TCP port 11080 to check the status of the container and restart it if the check fails due to connection problems.