During live OVN migration, network operator show the error message: Not applying unsafe configuration change: invalid configuration: [cannot change default network type when not doing migration]. Use 'oc edit network.operator.openshift.io cluster' to undo the change.   

Always

1. Create 4.15 nightly SDN ROSA cluster
2. oc delete validatingwebhookconfigurations.admissionregistration.k8s.io/sre-techpreviewnoupgrade-validation
3. oc edit featuregate cluster to enable featuregates 
4. Wait for all node rebooting and back to normal
5. oc patch Network.config.openshift.io cluster --type='merge' --patch '{"metadata":{"annotations":{"network.openshift.io/network-type-migration":""}},"spec":{"networkType":"OVNKubernetes"}}'

[weliang@weliang ~]$ oc delete validatingwebhookconfigurations.admissionregistration.k8s.io/sre-techpreviewnoupgrade-validation[weliang@weliang ~]$ oc edit featuregate cluster[weliang@weliang ~]$ oc patch Network.config.openshift.io cluster --type='merge' --patch '{"metadata":{"annotations":{"network.openshift.io/network-type-migration":""}},"spec":{"networkType":"OVNKubernetes"}}'network.config.openshift.io/cluster patched[weliang@weliang ~]$ [weliang@weliang ~]$ oc get co networkNAME      VERSION                              AVAILABLE   PROGRESSING   DEGRADED   SINCE   MESSAGEnetwork   4.15.0-0.nightly-2023-12-18-220750   True        False         True       105m    Not applying unsafe configuration change: invalid configuration: [cannot change default network type when not doing migration]. Use 'oc edit network.operator.openshift.io cluster' to undo the change.[weliang@weliang ~]$ oc describe Network.config.openshift.io clusterName:         clusterNamespace:    Labels:       <none>Annotations:  network.openshift.io/network-type-migration: API Version:  config.openshift.io/v1Kind:         NetworkMetadata:  Creation Timestamp:  2023-12-20T15:13:39Z  Generation:          3  Resource Version:    119899  UID:                 6a621b88-ac4f-4918-a7f6-98dba7df222cSpec:  Cluster Network:    Cidr:         10.128.0.0/14    Host Prefix:  23  External IP:    Policy:  Network Type:  OVNKubernetes  Service Network:    172.30.0.0/16Status:  Cluster Network:    Cidr:               10.128.0.0/14    Host Prefix:        23  Cluster Network MTU:  8951  Network Type:         OpenShiftSDN  Service Network:    172.30.0.0/16Events:  <none>[weliang@weliang ~]$ oc describe Network.operator.openshift.io clusterName:         clusterNamespace:    Labels:       <none>Annotations:  <none>API Version:  operator.openshift.io/v1Kind:         NetworkMetadata:  Creation Timestamp:  2023-12-20T15:15:37Z  Generation:          275  Resource Version:    120026  UID:                 278bd491-ac88-4038-887f-d1defc450740Spec:  Cluster Network:    Cidr:         10.128.0.0/14    Host Prefix:  23  Default Network:    Openshift SDN Config:      Enable Unidling:          true      Mode:                     NetworkPolicy      Mtu:                      8951      Vxlan Port:               4789    Type:                       OVNKubernetes  Deploy Kube Proxy:            false  Disable Multi Network:        false  Disable Network Diagnostics:  false  Kube Proxy Config:    Bind Address:      0.0.0.0  Log Level:           Normal  Management State:    Managed  Observed Config:     <nil>  Operator Log Level:  Normal  Service Network:    172.30.0.0/16  Unsupported Config Overrides:  <nil>  Use Multi Network Policy:      falseStatus:  Conditions:    Last Transition Time:  2023-12-20T15:15:37Z    Status:                False    Type:                  ManagementStateDegraded    Last Transition Time:  2023-12-20T16:58:58Z    Message:               Not applying unsafe configuration change: invalid configuration: [cannot change default network type when not doing migration]. Use 'oc edit network.operator.openshift.io cluster' to undo the change.    Reason:                InvalidOperatorConfig    Status:                True    Type:                  Degraded    Last Transition Time:  2023-12-20T15:15:37Z    Status:                True    Type:                  Upgradeable    Last Transition Time:  2023-12-20T16:52:11Z    Status:                False    Type:                  Progressing    Last Transition Time:  2023-12-20T15:15:45Z    Status:                True    Type:                  Available  Ready Replicas:          0  Version:                 4.15.0-0.nightly-2023-12-18-220750Events:                    <none>[weliang@weliang ~]$ oc get clusterversionNAME      VERSION                              AVAILABLE   PROGRESSING   SINCE   STATUSversion   4.15.0-0.nightly-2023-12-18-220750   True        False         84m     Error while reconciling 4.15.0-0.nightly-2023-12-18-220750: the cluster operator network is degraded[weliang@weliang ~]$ 

    

Migration success

Get same error message from ROSA and GCP cluster.