Document URL: https://docs.openshift.com/container-platform/3.7/install_config/install/host_preparation.html#installing-base-packages Section Number and Name: Installing Base Packages Describe the issue: Starting the installation on a RHEL 7.4 (redhat-release-server-7.4-18.el7.x86_64) based host. When following the host preparation steps, this host will now be updated to RHEL 7.5 (redhat-release-server-7.5-8.el7.x86_64), with the "yum update" command given as step 2. This update requires a reboot of the host which we do not document. The reboot is required for the dbus service as confirmed by the command "needs-restarting -r" from the package "yum-utils". --- # needs-restarting -r Core libraries or services have been updated: systemd -> 219-57.el7 openssl-libs -> 1:1.0.2k-12.el7 kernel -> 3.10.0-862.el7 linux-firmware -> 20180220-62.git6d51311.el7 glibc -> 2.17-222.el7 dbus -> 1:1.10.24-7.el7 Reboot is required to ensure that your system benefits from these updates. More information: https://access.redhat.com/solutions/27943 --- Without a reboot the dbus service is not restarted which causes a failure later in the installation process with the dnsmasq service. Suggestions for improvement: Add an instruction to reboot after the yum update. 2. Update the system to the latest packages: # yum update # systemctl reboot Additional information: This likely applies to all OCP versions as we state that "yum update" should be run which will in turn bring the base OS upto RHEL 7.5.
1550582 - dnsmasq from 7.5 may not listen to dbus? 1566309 - [3.7] Update and restart dbus prior to installing dnsmasq The linked bugzillas detail the need for a reboot.
LGTM.
Changes are live: https://docs.openshift.com/container-platform/3.7/install_config/install/host_preparation.html#installing-base-packages