>>>>> On Tue, 30 Jun 2015 15:48:49 +0200, Denny Fuchs <linuxm...@4lin.net> said:

    > label Debian Jessie Install
    > kernel debian-amd64/vmlinuz-3.16.0-4-amd64
    > append initrd=debian-amd64/initrd.img-3.16.0-4-amd64 ip=dhcp  
root=/dev/nfs rootfstype=nfs3 nfsroot=1.2.3.4:/srv/fai-jessie-amd64/nfsroot  
FAI_FLAGS=verbose,sshd,createvt FAI_CONFIG_SRC=nfs://1.2.3.4/srv/fai/config 
FAI_ACTION=install SERVER=1.2.3.4  rd.debug=1 panic=10

Instead of root=/dev/nfs nfsroot= you should use
root=1.2.3.4:/srv/.......

> now, Dracut is able to mount the NFS share, but the very last line I see is 
> „starting permit user sessions“ ( I had to capture a video to see it)  and 
> the client reboots/resets and I have a loop.

I guess the nfsroot is broken. Do you have this line in your
/etc/fai/NFSROOT?

sysvinit-core systemd-sysv-

-- 
regards Thomas

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