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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>

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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allow_no_indices

(Optional, boolean) If true, the request does not return an error if a wildcard expression or _all value retrieves only missing or closed indices.

This parameter also applies to index aliases that point to a missing or closed index.

expand_wildcards

(Optional, string) Controls what kind of indices that wildcard expressions can expand to. Valid values are:

all: Expand to open and closed indices.
open: Expand only to open indices.
closed: Expand only to closed indices.
none: Wildcard expressions are not accepted.

Defaults to all.

ignore_unavailable

(Optional, boolean) If true, missing or closed indices are not included in the response. 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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