Reindex multiple indices from remote with the same name

Elastic Stack Elasticsearch
1

I'd like to use Reindex API with remote and create indices with the same name as sources.
I tried:

POST _reindex
{
  "source": {
    "remote": {
      "host": "http://myremote:9200"
    },
    "index": "source-*"
  },
  "dest": {
    "index": "source"
  },
  "script": {
    "lang": "painless",
    "source": "ctx._index = 'source-' + (ctx._index.substring('source-'.length(), ctx._index.length()))"
  }
}

But it didn't work, just source index was created.
Is there any way to reindex multiple indices with the same index name as original?

1 Like
2

The above clearly says to move all the documents from multiple indices matching the wild card criteria to a single index. You will have to reindex selectively with one index at a time. Please refer to the following link for reindexing multiple indices.
https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-reindex.html#_reindexing_many_indices

3

Thank you for your reply.

According to https://www.elastic.co/guide/en/elasticsearch/reference/5.6/docs-reindex.html#_reindex_daily_indices, if we can change the name of indices, my script will completely work. Why can't we adopt that method?

4

Hmm, I am not sure about the usage of ctx variable over indices that belong to a remote cluster. I would be interested in knowing the details about it as well.

However, as a workaround you can take help of the bash script to achieve your objective.

1 Like
5

Your script looks helpful for me :slight_smile:

BTW, I digged into the related parts of Es code base.

Maybe unless the name of new index computed by script is different from the original one, a destination won't be changed.
Anyway, thank you for reply, @mjunaidmuzammil

2 Likes
6

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