https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/4/html-single/operations_guide/index#removing-a-ceph-monitor-using-ansible_ops this section contains a howto to remove mons manually without a call to ceph mon ok-to-stop this is dangerous. Users must call ok-to-stop before removing this MON. Otherwise the cluster might end up in an error state
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