Re: Warning regarding LTTng while checking status or restarting service

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Well, you could explicitly export HOME=/root then, that should make it go away.
I think it's normally only present in a login shell.

Jan

> On 06 Aug 2015, at 17:51, Josh Durgin <jdurgin@xxxxxxxxxx> wrote:
> 
> On 08/06/2015 03:10 AM, Daleep Bais wrote:
>> Hi,
>> 
>> Whenever I restart or check the logs for OSD, MON, I get below warning
>> message..
>> 
>> I am running a test cluster of 09 OSD's and 03 MON nodes.
>> 
>> [ceph-node1][WARNIN] libust[3549/3549]: Warning: HOME environment
>> variable not set. Disabling LTTng-UST per-user tracing. (in
>> setup_local_apps() at lttng-ust-comm.c:375)
> 
> In short: this is harmless, you can ignore it.
> 
> liblttng-ust tries to listen for control commands from lttng-sessiond
> in a few places by default, including under $HOME. It does this via a
> shared mmaped file. If you were interested in tracing as a non-root
> user, you could set LTTNG_HOME to a place that was usable, like /var/lib
> /ceph/. Since ceph daemons run as root today, this is irrelevant, and
> you can still use lttng as root just fine. Unfortunately there's no
> simple to silence liblttng-ust about this.
> 
> Josh
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