Symptoms

The local etcd instance on a system controller may be unreachable after a rolling upgrade. This can be seen via the output of /etc/etcd/dump_etcd.sh script on the controller.

Impact

The local etcd instance will become unreachable. If the local instance on the active controller is unreachable, and the standby controller fails, etcd and the openshift cluster will go offline.

Conditions

This can happen during a rolling upgrade.

Workaround

None

Fix Information

The unreachable etcd instance will be restored once the rolling update is completed.

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips