用于重新索引的ElasticSearch无痛脚本 [英] ElasticSearch painless script for reindexing

问题描述

我们正尝试使用下面的简单脚本在Elasticsearch中重新索引我们的数据。

We are trying to use following painless script to reindex our data in elasticsearch.

POST _reindex
{
  "source": {
    "index": "metricbeat-*"
  },
  "dest": {
    "index": "metricbeat"
  },
  "script": {
    "lang": "painless",
    "inline": "ctx._index = 'metricbeat-' + (ctx._index.substring('metricbeat-'.length(), ctx._index.length())) + '-1'"
  }
}

参考以下网址：
https://www.elastic.co/guide/zh-CN/elasticsearch/reference/current/docs-reindex.html#_reindex_daily_indices

此脚本可以完美运行并创建我们所有索引的另一个副本。
exa：如果我的原始索引为
metricbeat-2016.05.30
运行此脚本后，它将创建metricbeat-2016.05.30-1，它是原始索引的精确副本，即（metricbeat-2016.05 .30）

This script works perfect and creates another copy of our all indices. exa: if I have origin index as metricbeat-2016.05.30 after running this script it creates metricbeat-2016.05.30-1 which is exact copy of original index i.e (metricbeat-2016.05.30)

现在我想做以下两件事：

Now I want to do following 2 things:

1]删除原始索引，即metricbeat- 2016.05.30

2]重命名重新索引的索引或原始索引的副本，即（metricbeat-2016.05.30-1）回到metricbeat-2016.05.30，即原始索引。

1] Delete original index i.e metricbeat-2016.05.30
2] Rename reindexed index or copy of original index i.e (metricbeat-2016.05.30-1) back to metricbeat-2016.05.30 i.e original index.

我们该怎么做？
我们可以修改上面的脚本吗？

How can we do this ? can we modify above painless script ?

预先感谢！

推荐答案

我这样做的方法是像从Elasticsearch引用中的示例中那样重新索引，但是没有附加 -1，而是在索引前加上了 temp-：

The way I did it was to reindex like in the example from Elasticsearch reference, but instead of appending a "-1" I prepended the index with "temp-":

POST _reindex
{
  "source": {
    "index": "metricbeat-*"
  },
  "dest": {
    "index": "metricbeat"
  },
  "script": {
    "lang": "painless",
    "source": "ctx._index = 'temp-' + ctx._index"
  }
}

这样可以更轻松地删除带有 metricbeat- *模式的原始索引：

This makes it easier to delete the original indices with the pattern "metricbeat-*":

DELETE metricbeat-*

然后我再次重新索引以获取原始名称：

I then reindexed again to get the original name:

POST _reindex
{
  "source": {
    "index": "temp-metricbeat-*"
  },
  "dest": {
    "index": "metricbeat"
  },
  "script": {
    "lang": "painless",
    "source": "ctx._index = ctx._index.substring(5)"
  }
}

作为附带说明，Elasticsearch参考中的示例不必要地复杂：

As a side note, the example in the Elasticsearch reference is unnecessarily complex:

ctx._index = 'metricbeat-' + (ctx._index.substring('metricbeat-'.length(), ctx._index.length())) + '-1'

您得到的结果与代码相同：

You get the same result with the code:

ctx._index = ctx._index + '-1'

这篇关于用于重新索引的ElasticSearch无痛脚本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！