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Bug 1749421

Summary: Network kernel parameters are not set following operating system upgrade
Product: Red Hat Enterprise Linux 7 Reporter: Robert Sandu <rsandu>
Component: tunedAssignee: Jaroslav Škarvada <jskarvad>
Status: CLOSED DUPLICATE QA Contact: qe-baseos-daemons
Severity: high Docs Contact:
Priority: unspecified    
Version: 7.7CC: cshereme, jeder, jskarvad, olysonek
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-09-05 17:17:35 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 Robert Sandu 2019-09-05 14:58:26 UTC
Description of problem: following a RHEL 7.6 to 7.7 upgrade, some network kernel parameters like net.ipv4.neigh.default.gc_thresh and net.netfilter.nf_conntrack_max are not being applied according to profile values. 

Post upgrade values:

# sysctl net.ipv4.neigh.default.gc_thresh{1,2,3} net.netfilter.nf_conntrack_max
net.ipv4.neigh.default.gc_thresh1=8192
net.ipv4.neigh.default.gc_thresh2=32768
net.ipv4.neigh.default.gc_thresh3=65536
net.netfilter.nf_conntrack_max=1048576

Before upgrade:

# sysctl net.ipv4.neigh.default.gc_thresh{1,2,3} net.netfilter.nf_conntrack_max
net.ipv4.neigh.default.gc_thresh1 = 128
net.ipv4.neigh.default.gc_thresh2 = 512
net.ipv4.neigh.default.gc_thresh3 = 1024
net.netfilter.nf_conntrack_max = 262144

Version-Release number of selected component (if applicable):
Before (RHEL 7.6): tuned - 2.10.0-6.el7_6.3
After (RHEL 7.7):  tuned - 2.11.0-5.el7fdp

Actual results: while the `tuned` profile is active, 

Expected results: tuned profile settings to be applied as before the RHEL 7.7 upgrade.

Additional info:
- sosreports extracted from before and after node upgrade
- The applied tuned profile is [1], which also includes [2].

---

[1] https://github.com/openshift/openshift-ansible/blob/release-3.11/roles/tuned/templates/openshift/tuned.conf
[2] https://github.com/openshift/openshift-ansible/tree/release-3.11/roles/tuned/templates/openshift

Comment 3 Candace Sheremeta 2019-09-05 17:17:35 UTC

*** This bug has been marked as a duplicate of bug 1749411 ***