Dear Ceph Gurus
- This is just a report about an annoying warning we keep getting every
time our logs are rotated.
ibust[8241/8241]: Warning: HOME environment variable not set.
Disabling LTTng-UST per-user tracing. (in setup_local_apps() at
lttng-ust-comm.c:305)
- I am running ceph 9.0.3 in SL6.7 (or Centos 6.7)
# cat /etc/redhat-release
Scientific Linux release 6.7 (Carbon)
# ceph -v
ceph version 9.0.3 (7295612d29f953f46e6e88812ef372b89a43b9da)
- logrotate is run daily in our cluster, and ceph logs have a specific
config.
# rpm -qf /etc/logrotate.d/ceph
ceph-9.0.3-0.el6.x86_64
- Each time logrotate is executed, we received a daily notice with the
message
ibust[8241/8241]: Warning: HOME environment variable not set.
Disabling LTTng-UST per-user tracing. (in setup_local_apps() at
lttng-ust-comm.c:305)
- It seems that logrotate for ceph invokes a 'service ceph reload' which
is executed as
env -i PATH=/sbin:/usr/sbin:/bin:/usr/bin TERM=xterm-256color
/etc/init.d/ceph reload
- The 'env -i' sets an empty environment, and that is why we keep
receiving that message. Looking further, '/etc/init.d/ceph reload'
actually runs something as '/usr/bin/ceph-conf -c /etc/ceph/ceph.conf -n
mon<id> host' where ceph-conf is a binary using liblttng-ust.so.0
# env -i /usr/bin/ceph-conf -c /etc/ceph/ceph.conf -n <id>
libust[8241/8241]: Warning: HOME environment variable not set.
Disabling LTTng-UST per-user tracing. (in setup_local_apps() at
lttng-ust-comm.c:305)
# file /usr/bin/ceph-conf
/usr/bin/ceph-conf: ELF 64-bit LSB executable, x86-64, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18,
stripped
# ldd /usr/bin/ceph-conf
(...)
liblttng-ust.so.0 => /usr/lib64/liblttng-ust.so.0
(0x000000337da00000)
- To fix this, I had to set 'export HOME=/root' in
/usr/lib64/ceph/ceph_common.sh
Cheers
Goncalo
--
Goncalo Borges
Research Computing
ARC Centre of Excellence for Particle Physics at the Terascale
School of Physics A28 | University of Sydney, NSW 2006
T: +61 2 93511937
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