elasticsearch alias

Index Alias API allows the use of a name as an index of aliases, all API automatically converts the alias name of the actual index. Aliases can be mapped to a plurality of indexes, index alias can not have the same name. Aliases can be used to make a unified query multiple indexes and index migration can also be used to achieve functional view

View all aliases
GET / _aliases

Look under an alias index
GET / _alias / alias_name

View aliases beginning with 2017 the index at
GET / _alias / 2017

View an index aliases
GET / index_name / _alias

Add and delete aliases

POST /_aliases
{
    "actions" : [
        { "remove" : { "index" : "test1", "alias" : "alias1" } },
        { "add" : { "index" : "test2", "alias" : "alias1" } }
    ]
}

The alias is associated with more than one index added just a few actions:

POST /_aliases
{
    "actions" : [
        { "add" : { "index" : "test1", "alias" : "alias1" } },
        { "add" : { "index" : "test2", "alias" : "alias1" } }
    ]
}

You can also use an array of

POST /_aliases
{
    "actions" : [
        { "add" : { "indices" : ["test1", "test2"], "alias" : "alias1" } }
    ]
}

You can also use wildcards *

POST /_aliases
{
    "actions" : [
        { "add" : { "index" : "test*", "alias" : "all_test_indices" } }
    ]
}

You can also use the alias achieve similar view function

PUT /test1
{
  "mappings": {
    "type1": {
      "properties": {
        "user" : {
          "type": "keyword"
        }
      }
    }
  }
}

Creating a user views equal kimchy

POST /_aliases
{
    "actions" : [
        {
            "add" : {
                 "index" : "test1",
                 "alias" : "alias2",
                 "filter" : { "term" : { "user" : "kimchy" } }
            }
        }
    ]
}

Add a single alias

PUT /{index}/_alias/{name}

examples:
PUT /logs_201305/_alias/2013

PUT /users/_alias/user_12
{
    "routing" : "12",
    "filter" : {
        "term" : {
            "user_id" : 12
        }
    }
}

You can also specify an alias when creating an index

PUT /logs_20162801
{
    "mappings" : {
        "type" : {
            "properties" : {
                "year" : {"type" : "integer"}
            }
        }
    },
    "aliases" : {
        "current_day" : {},
        "2016" : {
            "filter" : {
                "term" : {"year" : 2016 }
            }
        }
    }
}

To delete an alias
DELETE / {index} / _ Alias / {name}
index * | _all | glob pattern | NAME1, NAME2, ...
name * | _all | glob pattern | NAME1, NAME2, ...

DELETE /logs_20162801/_alias/current_day

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