Last Modified: Jan 29, 2026
Affected Product(s):
F5OS F5OS-A, Install/Upgrade
Known Affected Versions:
F5OS-A 1.8.0, F5OS-A 1.8.1, F5OS-A 1.8.2, F5OS-A 1.8.3
Opened: May 24, 2024 Severity: 3-Major
By performing appliance downgrade from F5OS-A 1.7.0/F5OS-A 1.8.0 to any lower versions than F5OS-A 1.7.0, a log flood with below error is seen in /var/log/messages. level=error msg="Failed to process config: failed to process /var/lib/rancher/k3s/server/manifests/corednsfile.yaml: failed to update kube-system/kube-dns /v1, Kind=Service for kube-system/corednsfile: Service \"kube-dns\" is invalid: spec.clusterIPs[0]: Invalid value: []string(nil): primary clusterIP can not be unset"
No functional impact, expect the log flood for once in every 15 seconds.
When downgrade is performed from F5OS-A 1.7.0/F5OS-A 1.8.0 to any lower versions than F5OS-A 1.7.0, an error log flood related to kube-dns service is seen in /var/log/messages.
Execute the below command on the appliance: “kubectl delete svc kube-dns -n kube-system”.
None