elasticsearch修改mapping

es不支持直接修改mapping，可以用reindex功能重建索引

1. 新建备用索引

服务器上根据新的mapping文件新建索引

curl -XPUT "http://192.168.2.1:9200/new_index?pretty" -H 'Content-Type:application/json' -d @mapping_new.json

2. 拷贝数据到新的索引中

可用postman，也可以直接用命令

postman
POST http://192.168.2.1:9200_reindex
{
  "source": {
    "index": "old_index"
  },
  "dest": {
    "index": "new_index"
  }
}

//命令方式
curl -XPOST "http://192.168.2.1:9200/_reindex" -H 'Content-Type:application/json' -d '{"source":{"index": "old_index"},"dest": {"index": "new_index"}}'

3. 删除并新建原始索引

curl -XDELETE "http://192.168.2.1:9200/old_index"
curl -XPUT "http://192.168.2.1:9200/new_index?pretty" -H 'Content-Type:application/json' -d @mapping_new.json

4. 还原原始索引数据

curl -XPOST "http://192.168.2.1:9200/_reindex" -H 'Content-Type:application/json' -d '{"source":{"index": "new_index"},"dest": {"index": "old_index"}}'