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ISSUE

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To improve vSphere controller(https://github.com/openshift/machine-api-operator/tree/master/pkg/controller/vsphere) events of updated machines around deduplication or limitation.

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Example

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oc get events -n openshift-machine-api

LAST SEEN TYPE REASON OBJECT MESSAGE 4m43s Normal Update machine/ocp4prod-2vb7z-infra-nqqs4 Updated Machine ocp4prod-2vb7z-infra-nqqs4 4m41s

Normal Update machine/ocp4prod-2vb7z-infra-nzfb2 Updated Machine ocp4prod-2vb7z-infra-nzfb2 4m47s Normal Update machine/ocp4prod-2vb7z-infra-s5kvz Updated Machine ocp4prod-2vb7z-infra-s5kvz 4m51s

Normal Update machine/ocp4prod-2vb7z-master-0 Updated Machine ocp4prod-2vb7z-master-0 4m50s Normal Update machine/ocp4prod-2vb7z-master-1 Updated Machine ocp4prod-2vb7z-master-1 4m49s

Normal Update machine/ocp4prod-2vb7z-master-2 Updated Machine ocp4prod-2vb7z-master-2 4m48s Normal Update machine/ocp4prod-2vb7z-worker-29gq9 Updated Machine ocp4prod-2vb7z-worker-29gq9 4m46s

Normal Update machine/ocp4prod-2vb7z-worker-5d46r Updated Machine ocp4prod-2vb7z-worker-5d46r 4m42s Normal Update machine/ocp4prod-2vb7z-worker-8tfqr Updated Machine ocp4prod-2vb7z-worker-8tfqr 4m42s

Normal Update machine/ocp4prod-2vb7z-worker-f4zzz Updated Machine ocp4prod-2vb7z-worker-f4zzz 4m45s Normal Update machine/ocp4prod-2vb7z-worker-kq572 Updated Machine ocp4prod-2vb7z-worker-kq572 4m44s

Normal Update machine/ocp4prod-2vb7z-worker-rlmw8 Updated Machine ocp4prod-2vb7z-worker-rlmw8 4m48s Normal Update machine/ocp4prod-2vb7z-worker-xhccr Updated Machine ocp4prod-2vb7z-worker-xhccr 4m44s

Normal Update machine/ocp4prod-2vb7z-worker-xx6vt Updated Machine ocp4prod-2vb7z-worker-xx6vt

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Related

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Similar to BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1975460

Discussion: https://coreos.slack.com/archives/CBZHF4DHC/p1627546957269300 

Similar fix in cluster-api-provider-ovirt controller: https://github.com/openshift/cluster-api-provider-ovirt/pull/49