Working on a Rhel for Edge VM on libvirt, the hostname automatically acquired was of the form of an ip address:

[root@192 ~]# hostname
192.168.122.252

That causes issues with certificates and starting up pods (like service-ca).

MicroShift Version: 4.12.0_0.nightly_2022_12_16_075715_20221222150314_eb0488fd

Highly reproduceable

1.hostname set-hostname $your-ip
2. systemctl start microshift
3. oc get pods -A

For example, service-ca logs:

F1223 11:44:14.803531       1 cmd.go:138] unable to load configmap based request-header-client-ca-file: Get "https://10.43.0.1:443/api/v1/namespaces/kube-system/configmaps/extension-apiserver-authentication": x509: certificate is valid for 10.42.0.2, 192.168.122.252, not 10.43.0.1
goroutine 1 [running]:
k8s.io/klog/v2.stacks(0x1)

All working normally