When installing OpenShift or OKD4, all nodes will be using a default chrony config which doesn't necessarily work for all environments, such as firewalled-environments for example. Here's a quick how-to on how to create a custom /etc/chrony.conf for all nodes in your OpenShift Cluster: There are some prerequisites however. Butane is required as well as access to the openshift cluster along with administrative permissions. Start by downloading the 'butane' binary from github: [root@helper01 ~]# BUTANE_VERSION='v0.18.0' [root@helper01 ~]# curl -4kLo '/usr/bin/butane' -X GET "https://github.com/coreos/butane/releases/download/${BUTANEVER}/butane-x86_64-unknown-linux-gnu" [root@helper01 ~]# chown root:root /usr/bin/butane [root@helper01 ~]# chmod 755 /usr/bin/butane Create the two butane configs, first the master nodes: [root@helper01 ~]# cat 99-master-chrony.bu variant: openshift version: 4.13.0 metadata: name: 99-master-chr...