Installing SHC members and making them into a cluster is part of the documented procedures so it must be possible.  You have to have a cluster before selecting a captain. You can start an existing SHC in any order.  The cluster will choose its own captain. When creating a new cluster, use the init-shcluster-config command rather than add shcluster-member.  Note that the add shcluster-member command has different parameters for adding a new SH to the cluster vs adding an SH that is be re-added. ... View more