[IPv6] Issues with CheckMK

[KluthR]

Hey

 

I migrated from an exclusive cmk appliance to the docker version to get rid of one physical system. However, I experience permanent occasional v6 smart piung issues with the container. I can observe this with ping6 from inside the cmk container. Every few minutes I get 100% packet loss, then back to normal etc.

 

Unraid 6.12.8

 

Anyone with similar issues?

 

 

The container is set up this way:

 

docker run
  -d
  --name='checkmkk_empty'
  --net='eth0'
  --ip='192.168.178.29'
  -e TZ="Europe/Berlin"
  -e HOST_OS="Unraid"
  -e HOST_HOSTNAME="NAS"
  -e HOST_CONTAINERNAME="checkmkk_empty"
  -e 'CMK_SITE_ID'='l22'
  -l net.unraid.docker.managed=dockerman
  -v '/mnt/ssd/appdata/checkmk_empty/sites':'/omd/sites':'rw'
  -v '/etc/localtime':'/etc/localtime':'ro'
  -v '/mnt/ssd/appdata/checkmk/backup':'/backup':'rw'
  --mac-address 02:00:00:00:00:29
  --tmpfs /opt/omd/sites/l22/tmp:uid=1000,gid=1000 'checkmk/check-mk-cloud:2.2.0p23'

 

Some ping pictures which show the v6 issue only within cmk container. HA container does not show such issues..? HA is set up the same way.

 

docker is using macvtap bridge.

 

 

Thanks in advance!

Edited March 10 by KluthR
ping pics

[KluthR]

Feels more and more like a general v6 docker issue. docker and IPv6 are not the best friends. There are several issues regrading v6.

[ich777]

@KluthR is this a container from the CA App?

This subforum is reserved only for support threads from containers that are on the CA App.

 

Maybe move it over to the Docker Engine subforum.

[KluthR]

Oops. Yes, not CA related

 

Could someone move it for me?

[ich777]

On 3/11/2024 at 10:55 AM, KluthR said:

Could someone move it for me?

Done.

[KluthR]

New observings: Its not happening with bridge network interface. See https://forums.docker.com/t/occasional-ping-issues-over-ipv6/140296/2?u=rkluth

 

@ich777 You also have IPv6 experiences with Unraids docker. Did you ever came accros such issue?

[KluthR]

Does no one use IPv6 inside Unraids docker? Could someone do a ping test from inside a container to a public server and observe if some "address unreachable" occur?

 

I still need to retest with a native portainer install. Somehow I got a feeling that this is an Unraid thing...