The kernel is : 2.6.32-573.12.1.el6.x86_64 And the whole audit.rules file is : -D -i -b 8192 -a exit,never -F arch=b32 -F dir=/tmp/ -a exit,never -F arch=b64 -F dir=/tmp/ -a exit,never -F arch=b32 -F dir=/dev/shm/ -a exit,never -F arch=b64 -F dir=/dev/shm/ -a exit,never -F arch=b32 -F dir=/var/lock/lvm/ -a exit,never -F arch=b64 -F dir=/var/lock/lvm/ -w /sbin/agetty -p x -k console_access -w /sbin/mingetty -p x -k console_access -w /var/log/audit/ -k audit_logs -w /var/log/secure -k audit_logs -a exit,always -F arch=b32 -S creat -S mkdir -S mknod -S link -S symlink -S mkdirat -S mknodat -S linkat -S symlinkat -F uid=root -F success=1 -k creation -a exit,always -F arch=b64 -S creat -S mkdir -S mknod -S link -S symlink -S mkdirat -S mknodat -S linkat -S symlinkat -F uid=root -F success=1 -k creation -a exit,always -F arch=b32 -S rmdir -S unlink -S unlinkat -F uid=root -F success=1 -k deletion -a exit,always -F arch=b64 -S rmdir -S unlink -S unlinkat -F uid=root -F success=1 -k deletion -a always,exit -F arch=b32 -S adjtimex -S settimeofday -S stime -k time_change -a always,exit -F arch=b64 -S adjtimex -S settimeofday -k time_change -w /etc/localtime -p wa -k time_change -w /etc/group -p wa -k identity -w /etc/passwd -p wa -k identity -w /etc/gshadow -p wa -k identity -w /etc/shadow -p wa -k identity -w /etc/security/opasswd -p wa -k identity -w /etc/cron.allow -p wa -k system_files -w /etc/ntp.conf -p wa -k system_files -w /etc/ssh/sshd_config -p wa -k system_files -w /etc/hosts -p wa -k system_files -w /etc/resolv.conf -p wa -k system_files -w /etc/audit.rules -p wa -k system_files -w /etc/auditd.conf -p wa -k system_files -w /etc/rsyslog.conf -p wa -k system_files -a exit,always -F arch=b32 -S sethostname -k system_locale -a exit,always -F arch=b64 -S sethostname -k system_locale -w /etc/issue -p wa -k system_locale -w /etc/issue.net -p wa -k system_locale -w /etc/hosts -p wa -k system_locale -w /etc/sysconfig/network -p wa -k system_locale -w /etc/sudoers -p wa -k actions -w /root/.ssh/authorized_keys -p wa -k ssh_files -w /home/admnet/.ssh/authorized_keys -p wa -k ssh_files -w /home/system/.ssh/authorized_keys -p war -k ssh_files -w /home/oper/.ssh/authorized_keys -p wa -k ssh_files -w /home/sprod/.ssh/authorized_keys -p wa -k ssh_files -w /home/www/.ssh/authorized_keys -p wa -k ssh_files -w /home/integ/.ssh/authorized_keys -p wa -k ssh_files -w /home/stat/.ssh/authorized_keys -p wa -k ssh_files -w /home/reference/.ssh/authorized_keys -p wa -k ssh_files -w /bin/chown -p x -k system_commands -w /usr/local/sbin/tcpdump -p x -k system_commands -w /usr/bin/passwd -p x -k system_commands -w /usr/sbin/useradd -p x -k system_commands -w /usr/sbin/usermod -p x -k system_commands -w /bin/chgrp -p x -k system_commands -w /sbin/route -p x -k system_commands -w /sbin/shutdown -p x -k system_commands -w /sbin/reboot -p x -k system_commands -w /sbin/sysctl -p x -k system_commands -w /sbin/ifconfig -p x -k system_commands -w /usr/sbin/visudo -p x -k system_commands -w /usr/bin/crontab -p x -k system_commands -w /bin/chmod -p x -k system_commands -w /bin/su -p x -k system_commands -w /bin/env -p x -k system_commands -w /sbin/auditctl -p x -k system_commands -w /bin/mount -p x -k system_commands -w /bin/umount -p x -k system_commands -w /bin/ping6 -p x -k system_commands -w /bin/ping -p x -k system_commands -w /sbin/pam_timestamp_check -p x -k system_commands -w /sbin/netreport -p x -k system_commands -w /sbin/unix_chkpwd -p x -k system_commands -w /sbin/mount.nfs -p x -k system_commands -w /sbin/rmmod -p x -k modules -w /sbin/modprobe -p x -k modules -a exit,always -F arch=b64 -S init_module -S delete_module -k modules -a exit,always -F arch=b32 -S init_module -S delete_module -k modules -a exit,always -F arch=b64 -S open -S openat -F exit=-EPERM -k rights -a exit,always -F arch=b32 -S open -S openat -F exit=-EPERM -k rights -a exit,always -F arch=b64 -S ptrace -k info_scan -a exit,always -F arch=b32 -S ptrace -k info_scan During the hour preceding the fence we got these events from the passive node Key Summary Report =========================== total key =========================== 891 system_commands (ping) And on the active node : Key Summary Report =========================== total key =========================== 1330 system_commands 286 deletion I am going to follow your advice and to open a call with redhat. Anyway, I am interested in knowing if auditd has been reported to cause trouble without generating many events. Regards Philippe -----Message d'origine----- De : Paul Moore [mailto:paul@paul-moore.com] Envoyé : mardi 1 mars 2016 14:25 À : Maupertuis Philippe Cc : linux-audit(a)redhat.com Objet : Re: auditd and redhat cluster On Mon, Feb 29, 2016 at 7:45 AM, Maupertuis Philippe <philippe.maupertuis(a)worldline.com&gt; wrote: Hi Philippe, First, as this is a RH cluster product, I would suggest contacting RH support with your question if you haven't already; this list is primarily for upstream development and support. If you are able to experiment with the system, or have a test environment, I would suggest trying to narrow down the list of audit rules/watches to see which rules/watches have the most affect on the iowait times. You've listed four rules, but you didn't list the watches you have configured. Also, what kernel version are you using? -- paul moore www.paul-moore.com !!!************************************************************************************* "Ce message et les pièces jointes sont confidentiels et réservés à l'usage exclusif de ses destinataires. Il peut également être protégé par le secret professionnel. Si vous recevez ce message par erreur, merci d'en avertir immédiatement l'expéditeur et de le détruire. L'intégrité du message ne pouvant être assurée sur Internet, la responsabilité de Worldline ne pourra être recherchée quant au contenu de ce message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission exempte de tout virus, l'expéditeur ne donne aucune garantie à cet égard et sa responsabilité ne saurait être recherchée pour tout dommage résultant d'un virus transmis. This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. 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Philippe, What does a perf top show? Do you see get_task_cred or audit_filter_rules as high consumers? If they are high, then try turning off the monitoring of the /tmp, /dev/shm and /var/lock/lvm trees or if appropriate, switch to monitoring via a path directive if you don't need to monitor the entire tree. Steve, Paul, I have yet to put together a bug report, or researched to see if the problem exists upstream, but have discovered recursive directory rules can be expensive on the kernel. The rules below on a system running rabbitmq can see get_task_cred and audit_filter_rules above 10% each. -w /etc/pam.d -p wa -k PAM_Mods -w /boot -k BOOT_Mods -w /boot/grub/grub.conf -p war -k BOOT_Mods -w /etc/security -p wa -k Security_Mods -w /etc/sysconfig -p wa -k Sysconfig_Mods -w /etc/ld.so.conf.d -p wa -k Library_Mods -w /etc/inittab -p wa -k StartUp_Mods -w /etc/rc.d -p wa -k StartUp_Mods Regards On Tue, 2016-03-01 at 09:14 -0500, Steve Grubb wrote:

On Tue, 2016-03-01 at 16:53 -0500, Paul Moore wrote: Interestingly, if we convert all the above into possibly 100's of specific file watches (for all files in the tree's at a given time), the system does not take a hit any more. Again, as soon as I can, I will produce a test configuration. I will be interested in Philippe's results, if he has/can test my suggestion. Rgds