Zabbix gets an error when trying get info from Ceph servers:
11955:20150910:115024.706 error reason for "exo-osd-1:ceph.ops" changed: Received value [libust[2316737/2316737]: Warning: HOME environment variable not set. Disabling LTTng-UST per-user tracing. (in setup_local_apps() at lttng-ust-comm.c:305)] is not suitable for value type [Numeric (unsigned)] and data type [Decimal]

When I try get same info through script on client, it works:
exo-osd-1 !]$ /opt/ceph-status.sh rados_total
614431632

But zabbix_get shows same error:
exo-http-1:~$ zabbix_get -k ceph.rados_total -s exo-osd-1
libust[2380555/2380555]: Warning: HOME environment variable not set. Disabling LTTng-UST per-user tracing. (in setup_local_apps() at lttng-ust-comm.c:305)
libust[2380701/2380701]: Warning: HOME environment variable not set. Disabling LTTng-UST per-user tracing. (in setup_local_apps() at lttng-ust-comm.c:305)
614431632

I edit ceph-status.sh and redirected all errors to /dev/null. Then Zabbix shows info from Ceph. But it's dirty workaround.

I found some results about this issue:
https://lists.lttng.org/pipermail/lttng-dev/2015-March/024325.html
https://lists.lttng.org/pipermail/lttng-dev/2013-June/020599.html

As I understand, issue is up on Zabbix.