What is the Elasticsearch-py equivalent to alias a

问题:

I am trying to implement multiples indices approach using elasticsearch-dsl. There are basically two steps:

1. Create aliases:

PUT /tweets_1/_alias/tweets_search 
PUT /tweets_1/_alias/tweets_index 

2. Change alias when necessary:

POST /_aliases
{
  "actions": [
    { "add":    { "index": "tweets_2", "alias": "tweets_search" }}, 
    { "remove": { "index": "tweets_1", "alias": "tweets_index"  }}, 
    { "add":    { "index": "tweets_2", "alias": "tweets_index"  }}  
  ]
}

I could only implement the step 1 using elasticsearch-py (not the dsl):

from elasticsearch.client import IndicesClient
IndicesClient(client).("tweets_1", "tweets_search")
IndicesClient(client).("tweets_1", "tweets_index")

I have no clue how to do that for step 2. So, what would be the equivalent in elasticsearch-dsl (or at least in elasticsearch-py)?

回答1:

To implement that you need to use elasticsearch-py:

from elasticsearch import Elasticsearch
es = Elasticsearch()

# use es.indices instead of instantiating IndicesClient
es.indices.put_alias(index='tweets_1', name='tweets_search')
es.indices.put_alias(index='tweets_1', name='tweets_index')

es.indices.update_aliases({
  "actions": [
    { "add":    { "index": "tweets_2", "alias": "tweets_search" }}, 
    { "remove": { "index": "tweets_1", "alias": "tweets_index"  }}, 
    { "add":    { "index": "tweets_2", "alias": "tweets_index"  }}  
  ]
})

回答2:

index_list_for_realias = [...]
aliases_list_to_realias = [...]

for i in index_list_for_realias:
    print(i)
    for j in aliases_list_to_realias:
        es.indices.put_alias(index=i, name="logstash5-uni-" + j, body={
                "filter": {
                    "term": {
                        "uni": j
                    }
                }
            }
        )