Empty topology key for CircularReplication

[cangyin]

Warning  FailedCreate  7m47s (x18 over 18m)  statefulset-controller  create Pod chi-ch-ms1-cluster-0-0-0 in StatefulSet chi-ch-ms1-cluster-0-0 failed error: Pod "chi-ch-ms1-cluster-0-0-0" is invalid: [spec.affinity.podAffinity.requiredDuringSchedulingIgnoredDuringExecution[0].topologyKey: Required value: can not be empty ...

Here the TopologyKey field is not assigned:

clickhouse-operator/pkg/model/chi/normalizer.go

Lines 763 to 784 in df26023

	case deployment.PodDistributionCircularReplication:
	// PodDistribution is known
	// PodDistributionCircularReplication is a shortcut to simplify complex set of other distributions
	// All shortcuts have to be expanded
	if podDistribution.Scope == "" {
	podDistribution.Scope = deployment.PodDistributionScopeCluster
	}
	// TODO need to support multi-cluster
	cluster := n.ctx.chi.Spec.Configuration.Clusters[0]
	// Expand shortcut
	return []api.ChiPodDistribution{
	{
	Type: deployment.PodDistributionShardAntiAffinity,
	Scope: podDistribution.Scope,
	},
	{
	Type: deployment.PodDistributionReplicaAntiAffinity,
	Scope: podDistribution.Scope,
	},