Bug 1276033

Summary:	[LTTNG:RBD]: RBD lttng trace logs are not generated on UBUNTU 14.04
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	shylesh <shmohan>
Component:	RBD	Assignee:	Josh Durgin <jdurgin>
Status:	CLOSED NOTABUG	QA Contact:	ceph-qe-bugs <ceph-qe-bugs>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	1.3.1	CC:	ceph-eng-bugs, jdillama
Target Milestone:	rc
Target Release:	1.3.2
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-10-28 14:19:33 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description shylesh 2015-10-28 13:04:43 UTC

Description of problem:
RBD lttng trace logs are not getting generated on UBUNTU 14.04

Version-Release number of selected component (if applicable):
1.3.1 Ubuntu 

How reproducible:
always

Steps to Reproduce:
1.Configured the vm and attached an RBD image as secondary disk, apparmor is disabled
2.configured lttng and started a session as following
  
  lttng create -o traces librbd1
  lttng enable-event -u 'librbd:*'
  lttng start
  /* do some operationf on secondary disk from VM */
  lttng stop

 

Actual results:
No logs are generated in the target folder

Expected results:
Trace logs should be generated

Additional info:

Comment 3 Jason Dillaman 2015-10-28 13:17:14 UTC

QEMU log is spamming:

libust[23792/23793]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)

Checking AppArmor status:

# apparmor_status
apparmor module is loaded.
8 profiles are loaded.
8 profiles are in enforce mode.
   /sbin/dhclient
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/connman/scripts/dhclient-script
   /usr/lib/libvirt/virt-aa-helper
   /usr/sbin/libvirtd
   /usr/sbin/ntpd
   /usr/sbin/tcpdump
   libvirt-c2fc3986-9a48-47cd-84cb-cf84b420998a
0 profiles are in complain mode.
3 processes have profiles defined.
3 processes are in enforce mode.
   /usr/sbin/libvirtd (27632) 
   /usr/sbin/ntpd (1055) 
   libvirt-c2fc3986-9a48-47cd-84cb-cf84b420998a (23792) 
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.

The libvirt (QEMU) process is currently assigned to an enforcing profile, thus access is denied to the LTTng-UST device.

Comment 4 shylesh 2015-10-28 13:41:49 UTC

I have already removed it before starting testing using 

 sudo /etc/init.d/apparmor stop
 sudo update-rc.d -f apparmor remove

is this the right command ?

Comment 5 shylesh 2015-10-28 14:19:33 UTC

Closing this bug as it worked after uninstalling apparmor