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Index alias exists API

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Index alias exists API

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Checks if an index alias exists.

An index alias is a secondary name used to refer to one or more existing indices.

Most Elasticsearch APIs accept an index alias in place of an index name.

HEAD /_alias/alias1

Request

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HEAD /_alias/<alias>

HEAD /<index>/_alias/<alias>

Prerequisites

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If the Elasticsearch security features are enabled, you must have the view_index_metadata or manage index privilege for the index alias. If you specify an index, you must also have view_index_metadata or manage index privilege for the index.

Path parameters

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<alias>: (Required, string) Comma-separated list or wildcard expression of index alias names used to limit the request.
<index>: (Optional, string) Comma-separated list or wildcard expression of index names used to limit the request.

Query parameters

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expand_wildcards

(Optional, string) Controls what kind of indices that wildcard expressions can expand to. Multiple values are accepted when separated by a comma, as in open,hidden. Valid values are:

all: Expand to open and closed indices, including hidden indices.
open: Expand only to open indices.
closed: Expand only to closed indices.
hidden: Expansion of wildcards will include hidden indices. Must be combined with open, closed, or both.
none: Wildcard expressions are not accepted.

Defaults to all.

ignore_unavailable

(Optional, Boolean) If false, the request returns an error if it targets a missing or closed index. Defaults to false.

local

(Optional, Boolean) If true, the request retrieves information from the local node only. Defaults to false, which means information is retrieved from the master node.

Response codes

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200: Indicates all specified index aliases exist.
404: Indicates one or more specified index aliases do not exist.

Examples

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HEAD /_alias/2030
HEAD /_alias/20*
HEAD /logs_20302801/_alias/*

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