ElasticSearch设置和索引重建

我的索引需求如下：

1. 需要索引的字段有很多个，远远大于默认的1000个
2. 需要动态创建字段索引，dynamic默认为true
3. 禁止字符串自动转换，关闭时间和数字转换

创建索引

PUT myindex
{
    "settings": {
        "number_of_shards": 5,
        "number_of_replicas": 2,
        "index.mapping.total_fields.limit":200000,
        "index.max_result_window":100000
    }
}

curl -XPUT http://localhost:9200/myindex/_settings -d '{"index.mapping.total_fields.limit":200000,"index.max_result_window":5000000}'

关闭时间和数字自动转换，时间字符串仍然保存为字符串

PUT myindex
{
  "mappings": {
    "date_detection": false,
    "numeric_detection": false
  }
}

curl -XPUT http://localhost:9200/myindex/test/_mapping -d '{"date_detection": false,"numeric_detection": false}'

修改索引字段

ES不能修改字段类型是个很蛋疼的事情，只能重新新建一个索引

1. 业务代码操作的时候使用索引别名myindex_business

POST /_aliases
{
 "actions": [
   {
     "add": {
       "index": "myindex",
       "alias": "myindex_business"
     }
   }
 ]
}

curl -XPOST http://localhost:9200/_aliases -d '{"actions":[{"add":{"index":"myindex","alias":"myindex_business"}},{"add":{"index":"myindex2","alias":"myindex_business2"}}]}'

2. 先创建另外一个索引2：myindex2
3. 根据索引1的mapping修改好字段类型，提前建好索引2的mapping
4. 执行_reindex，将索引1的数据全部迁移到索引2中

POST _reindex
{
"source":{"index":"myindex"},
"dest":{"index":"myindex2"}
}

4. 删除索引1的别名，给索引2创建别名myindex_business

POST /_aliases
{
 "actions": [
   {
     "add": {
       "index": "myindex2",
       "alias": "myindex_business"
     }
   }
 ]
}

5. 删除索引1

  curl -XDELETE -u elastic:changeme http://localhost:9200/myindex