[lustre-discuss] systemd lnet/rdma conflict

[Andreas Dilger]

Rick,
would you be able to put this in the form of a patch against lustre/scripts/systemd/lnet.service so that this is working
well for everyone.  You could use LU-9673 for this.



> On Jul 16, 2020, at 2:34 PM, Mohr Jr, Richard Frank <rmohr at utk.edu> wrote:
>> On Jul 16, 2020, at 2:46 PM, Christopher Benjamin Coffey <Chris.Coffey at nau.edu> wrote:
>> 
>> 
>> I'm trying to get lustre , and rdma setup on an el8 system. I can't get systemd to get the two services: lnet, and rdma shutdown correctly without hanging the system. I've tried many things in the rdma.service, and lnet.service files to get them to work correctly but still the issue exists. Here are my service files below. Anyone know how to fix this?
> 
> Yup, ran into the same thing.  See suggestion below.
> 
>> 
>> ---------
>> [Unit]
>> Description=lnet management
>> 
>> Requires=network-online.target
>> After=network-online.target rdma.service
>> Wants=rdma.service
>> 
>> ConditionPathExists=!/proc/sys/lnet/
>> 
>> [Service]
>> Type=oneshot
>> RemainAfterExit=true
>> ExecStart=/sbin/modprobe lnet
>> ExecStart=/usr/sbin/lnetctl lnet configure
>> ExecStart=/usr/sbin/lnetctl import /etc/lnet.conf
>> ExecStop=/usr/sbin/lnetctl lnet unconfigure
>> ExecStop=/usr/sbin/lustre_rmmod
>> TimeoutStopSec=30
>> 
>> [Install]
>> WantedBy=multi-user.target
> 
> 
> Try  adding “BindsTo=rdma.service” to the lnet service file.  This should force the lnet service to be stopped if the rdma service is ever stopped.
> 
> —
> Rick Mohr
> Senior HPC System Administrator
> Joint Institute for Computational Sciences
> University of Tennessee
> 
> 
> 
> 
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Cheers, Andreas





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