Bug 1036049
| Summary: | [tuned] SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf" should be reversed | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Jiri Belka <jbelka> |
| Component: | tuned | Assignee: | Jaroslav Škarvada <jskarvad> |
| Status: | CLOSED ERRATA | QA Contact: | Tereza Cerna <tcerna> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 6.6 | CC: | alonbl, bblaskov, didi, iheim, jbelka, jeder, jentrena, jskarvad, mnavrati, oschreib, ovasik, pep, psklenar, rvokal, sbonazzo, tcerna |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | tuned-0.2.19-15.el6 | Doc Type: | Bug Fix |
| Doc Text: |
On Red Hat Enterprise Linux 6, the /etc/sysctl.conf file is the default configuration file for the sysctl tool settings and overrides can be specified in the /etc/sysctl.d/ directory. The tuned service previously handled the settings the opposite way, which is common in certain distributions. Consequently, the configuration specified in /etc/sysctl.d/ could be overridden by /etc/sysctl.conf. The way tuned handles /etc/sysctl.conf and /etc/sysctl.d/ has been reversed to match the Red Hat Enterprise Linux 6 logic. As a result, /etc/sysctl.conf is now processed first and can be overridden by settings in /etc/sysctl.d/.
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-07-22 07:14:54 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: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1075802, 1159926 | ||
This request was not resolved in time for the current release. Red Hat invites you to ask your support representative to propose this request, if still desired, for consideration in the next release of Red Hat Enterprise Linux. Hmm, by checking /etc/init.d/functions:apply_sysctl it does seem that RHEL-6 uses reverse order than other distros (including current Fedora) do. We need to be consistent with the init script, thus giving dev_ack+ Side note: /etc/sysctl.conf is deprecated in current Fedora (F20) and supported by symlink: /etc/sysctl.d/99-sysctl.conf -> ../sysctl.conf Upstream commit: https://git.fedorahosted.org/cgit/tuned.git/commit/?h=1.0&id=e2b78c65e56eccec44c64d3b157a2141aa208a99 ==============================
Verified in version:
tuned-0.2.19-15.el6.noarch
PASSED
==============================
# cat /etc/sysconfig/ktune | grep SYSCTL_POST
SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
# cat /etc/sysctl.conf | grep kernel.shmmax
#kernel.shmmax = 4294967295
kernel.shmmax = 20000000
# cat /etc/sysctl.d/aaa.conf
kernel.shmmax = 30000000
== reboot ==
# tuned-adm profile virtual-guest
# sysctl kernel.shmmax
kernel.shmmax = 30000000
# grep SYSCTL_POST= `rpm -ql tuned` | grep -v \#
/etc/sysconfig/ktune:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/default/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/desktop-powersave/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/enterprise-storage/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/laptop-ac-powersave/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/laptop-battery-powersave/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/latency-performance/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/server-powersave/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/spindown-disk/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/throughput-performance/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/virtual-guest/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/etc/tune-profiles/virtual-host/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
/usr/share/doc/tuned-0.2.19/README.ktune: SYSCTL_POST="/etc/sysctl.conf /etc/sysctl.d/*"
==================================
Reproduced in version:
tuned-0.2.19-13.el6_6.1.noarch
FAIL
==================================
# cat /etc/sysconfig/ktune | grep SYSCTL_POST
SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
# cat /etc/sysctl.conf | grep kernel.shmmax
#kernel.shmmax = 4294967295
kernel.shmmax = 20000000
# cat /etc/sysctl.d/aaa.conf
kernel.shmmax = 30000000
== reboot ==
# tuned-adm profile virtual-guest
# sysctl kernel.shmmax
kernel.shmmax = 20000000
# grep SYSCTL_POST= `rpm -ql tuned` | grep -v \#
/etc/sysconfig/ktune:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/default/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/desktop-powersave/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/enterprise-storage/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/laptop-ac-powersave/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/laptop-battery-powersave/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/latency-performance/ktune.sysconfig:SYSCTL_POST="/etc/syctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/server-powersave/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/spindown-disk/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/throughput-performance/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/virtual-guest/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/etc/tune-profiles/virtual-host/ktune.sysconfig:SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
/usr/share/doc/tuned-0.2.19/README.ktune: SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-1376.html |
Description of problem: SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf" should be reversed. I belived it should be reverse because it should go from implicit to explicit, that is from "defaults" to "overriden" valued in sysctl.d subdir. Found this hard when /etc/sysctl.d/ovirt-engine.conf sysctl values where again overriden. Some apps could put their sysctl settings into sysctl.d subdir, thus those values should always win. Version-Release number of selected component (if applicable): tuned-0.2.19-13.el6.noarch How reproducible: 100% Steps to Reproduce: 1. modify as below: # grep kernel.shmmax /etc/sysctl.conf /etc/sysctl.d/* /etc/sysctl.conf:##kernel.shmmax = 68719476736 /etc/sysctl.conf:kernel.shmmax = 30000000 /etc/sysctl.d/ovirt-engine.conf:kernel.shmmax = 41943040 2. install tuned 3. reboot Actual results: values defined in files in sysctl.d dir are again overriden by ktuned RC script because of order (SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf") defined in /etc/sysconfig/ktune Expected results: values defined in files in sysctl.d dir should always win! (switch order in /etc/sysconfig/ktune) Additional info: functions file has valid ordering of sysctl conf files processing, thus why ktune reverses the order? # sed -n '/^apply/,/^$/p' /etc/init.d/functions apply_sysctl() { sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1 for file in /etc/sysctl.d/* ; do is_ignored_file "$file" && continue test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1 done }