Last Modified: Jul 15, 2026
Affected Product(s):
F5OS F5OS-C
Known Affected Versions:
F5OS-C 1.8.2
Fixed In:
F5OS v2.0.0
Opened: Nov 25, 2025 Severity: 2-Critical
After a controller upgrade, is is possible that the controller etcd processes can be out of sync causing the cluster to go into an unhealthy state.
The cluster will remain in an unhealthy state.
The etcd processes require a quorum of three and the third etcd process is not being launched which leaves the etcds on both controllers in an inconsistent state.
On the active controller, manually launch the third etcd instance, by running this command at the root shell /etc/etcd/launch_etcd.sh Then issue a controller failover.
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