Elasticsearch health status 显示为 yellow 解决方法

查看 health

curl -XGET "http://localhost:9200/_cluster/health?pretty=true"

返回：

{
  "cluster_name" : "elasticsearch",
  "status" : "yellow",
  "timed_out" : false,
  "number_of_nodes" : 1,
  "number_of_data_nodes" : 1,
  "active_primary_shards" : 6,
  "active_shards" : 6,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 2,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 75.0
}

查看索引状态

curl -XGET "http://localhost:9200/_cat/indices?v"

返回：

设置所有副本（rep）个数为 0

curl -XPUT "http://localhost:9200/_settings" -H 'Content-Type: application/json' -d'
{
    "index" : {
        "number_of_replicas" : 0
    }
}'

再次查看索引状态：显示为green。

设置单个副本个数为 0

curl -XPUT "http://localhost:9200/my_index/_settings" -H 'Content-Type: application/json' -d'
{ 
    "index" : { 
        "number_of_replicas" : 1 
    } 
}'