-bash-4.1# curl 'localhost:9200/_cat/indices/.kibana*?v'
health status index pri rep docs.count docs.deleted store.size pri.store.size
red open .kibana 1 0
Unfortunately you have a single node with no replica, so unless you have a backup of the Kibana index, you have likely lost it.
You have nearly 1800 shards on a single node. That is not good at all and is causing you problems with cluster stability and all those unassigned shards. You need to look at reducing that shard count to at least a third of the current size.
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