Start dbus activation daemon inside docker container

I am installed OpenSUSE Tumbleweed inside docker (via docker pull), installed dbus then. Problem is, when I try to start my own auto-activation daemon, dbus complain about helper have wrong access rights. I read many topics on stackexchange, sourceforge, etc. The rights is correct. Also, I read user tag must be placed in dbus config file. It is inside /etc/dbus/system.conf . When I try to ran my daemon by hand /usr/libexec/dbus-1/helper reversed-domain.name, it starts. Where could been error?

The issue was:

  1. No --privileged switch, so suid bit get ommited
  2. I added --security-opt no-new-privileges . Maybe this was mistake?
    3.I also added --cap-add=SYS_ADMIN . I think it was not necessary.

Sorry for taking your time. Reading full spec is boring and takes too much time. I thought solution I have found to gives rights to /proc and bpf-trace, but without too many rights, was correct.