Kibana server is not ready

[tharunkumar (tharun)]

Hi i am using kibana 7.12.0. i am facing this issue frequently.can please help me with a solution
[ FATAL Error: Unable to complete saved object migrations for the [.kibana] index. Please check the health of your Elasticsearch cluster and try again. Error: [cluster_block_exception]: index [.kibana_7.12.0_001] blocked by: [TOO_MANY_REQUESTS/12/disk usage exceeded flood-stage watermark, index has read-only-allow-delete block]; ]

[lusynda]

One of your data node has exceed its size campacity.
Default to elastic i thinks the flood gate is 95%
You can fix this by ussing the api to change the flood gate to higher %.

PUT /_cluster/settings
{
  "persistent" : {
    "cluster.routing.allocation.disk.watermark.flood_stage" : "96%" 
  }
}