es 迁移数据, 重建索引

原索引

PUT my_index

{

"mappings": {

"_doc": {

"properties": {

"create_date": {

"type": "date",

"format": "yyyy-MM-dd ||yyyy/MM/dd"

}

}

}

}

}

　　二、创建新索引

PUT my_index2

{

"mappings": {

"_doc": {

"properties": {

"create_date": {

"type": "text"

}

}

}

}

}

　　三、同步数据

POST _reindex

{

"source": {

"index": "my_index"

},

"dest": {

"index": "my_index2"

}

}

　　四、删除原索引

DELETE my_index

　　五、设置别名

POST /_aliases

{

"actions": [

{"add": {"index": "my_index2", "alias": "my_index"}}

]

}

#######

POST _reindex

{

"source": {

"index": "t1"

},

"dest": {

"index": "t2",

"version_type": "external"

},

"script": {

"source":"def w = ctx._source.remove('weight');ctx._source.weight=w;",

"lang": "painless"

}

}