获取集群健康信息
GET /_cluster/health
集群设置
GET /_cluster/settings
GET */_settings
查看日志有多少UNASSIGNED
GET _cat/shards | grep UNASSIGNED
设置集群分片数，默认1000
PUT /_cluster/settings
{
  "transient": {
    "cluster": {
      "max_shards_per_node":10000
    }
}
}
刷新所有索引
POST /_refresh
设置ES索引允许读和删数据，允许增和改数据，此属性为true时，ES索引只允许读和删数据，不允许增和改数据
 PUT _settings
    {
    "index": {
    "blocks": {
    "read_only_allow_delete": "false"
    }
    }
    }
设置所有索引副本为o
PUT _settings
{
      "number_of_replicas" : 0
}
重新解锁分片  解决由于副本丢失等造成的yellow状态 副本分片 UNASSIGNED
PUT _cluster/settings
{
"transient": {
"cluster.routing.allocation.enable": "all"  
}
}