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Tuned 2.9 introduces automatic and manual profile selection.
If there is a file /etc/tuned/profile_mode containing "manual"
on a system with tuned 2.9, without this PR the appropriate OCP
profiles will not be set. This PR removes the file prior to
tuned restart, in addition to /etc/tuned/active_profile to
make the tuned profile selection automatic.
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We set these variables using facts in init, no need
to duplicate the logic all around the codebase.
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Currently, profiles for the tuned daemon are set only for
OpenShift node(s). This excludes the OpenShift loadbalancer.
As a result, ARP cache limits on loadbalancers are not raised.
This causes problems with HA setups where loadbalancers serve
1k+ OpenShift nodes.
This commit ensures the openshift-control-plane role is applied
to loadbalancers, masters and OpenShift infra nodes. Regular
OpenShift worker nodes get the openshift-node profile.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1498213
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