2.2. Notable Technical Changes
Distinct channels have been created for OpenShift Enterprise 2.2 for both RHN Classic and Red Hat Subscription Management. See the OpenShift Enterprise Deployment Guide  for an updated list of channel names and for more information on available repositories.
Starting with OpenShift Enterprise 2.2, the
apache-mod-rewrite front-end server proxy plug-in is deprecated. New deployments of OpenShift Enterprise 2.2 now use the
apache-vhost plug-in as the default.
apache-vhostplug-in by default. The
apache-mod-rewriteplug-in is incompatible with the
apache-vhostplug-in, and the front-end server configuration on all nodes across a deployment must be consistent. See the OpenShift Enterprise Deployment Guide for more information on upgrading from 2.1 to 2.2.
apache-mod-rewriteplug-in before starting the 2.2 upgrade, you can optionally allow the
ose-upgradetool to migrate your node hosts to the
apache-vhostplug-in while upgrading to 2.2. The default behavior of the
ose-upgradetool, however, is to leave the
apache-mod-rewriteplug-in in place, if installed. See the OpenShift Enterprise Deployment Guide for more information.
OpenShift Enterprise (OSE) 2.1 was originally released on Red Hat Enterprise Linux (RHEL) 6.5. In order for the
mmopenshift plug-in to work, the rsyslog7 package from RHEL 7 was shipped in the OSE 2.1 channel. Later, RHEL 6.6 shipped its own rsyslog7 package that was incompatible with the one from OSE. This created many edge cases for RPM conflicts and confusing configurations.
rsyslog7-mmopenshiftpackage for compatibility with RHEL 6.6. The
openshift.shinstallation script and the
ose-upgradetool used for upgrading from 2.1 to 2.2 have been updated to handle the configuration changes as well. The rsyslog7 package from RHEL 6.6 conflicts with the base rsyslog package. A manual upgrade can be done with the following steps:
cp -f /etc/rsyslog7.d/* /etc/rsyslog.d/#
yum shell --disableplugin=priorities -y <<YUM#
erase rsyslog rsyslog7-7.4.7 rsyslog7-mmopenshift-7.4.7#
install rsyslog7 rsyslog7-mmopenshift#
sed -i 's/rsyslog7.d/rsyslog.d/' /etc/rsyslog.conf#
service rsyslog start