第 5 章 Downgrading a cluster
After an OpenShift Container Platform upgrade, you might need to downgrade your cluster to an earlier version. You can downgrade from OpenShift Container Platform version 3.11 to version 3.10.
In the initial release of OpenShift Container Platform version 3.11, downgrading does not completely restore your cluster to version 3.10. Do not downgrade.
If you need to downgrade, contact Red Hat support so they can help you determine the best course of action.
Downgrading a cluster to version 3.10 is supported for only RPM-based installations of OpenShift Container Platform, and you must take your entire cluster offline to downgrade.
5.1. Verifying backups
Ensure that a backup of the master-config.yaml file, scheduler.json file, and the etcd data directory exist on your masters:
/etc/origin/master/master-config.yaml.<timestamp> /etc/origin/master/master.env /etc/origin/master/scheduler.json /var/lib/etcd/openshift-backup-xxxx
You save these files during the upgrade process.
Locate the copies of the following files that you created when you prepared for an upgrade.
On node and master hosts:
/etc/origin/node/node-config.yaml
On etcd hosts, including masters that have etcd co-located on them:
/etc/etcd/etcd.conf
