HEAD /{index}/_alias/{name}
Api key auth

All methods and paths for this operation:

HEAD /_alias/{name}

HEAD /{index}/_alias/{name}

Check if one or more data stream or index aliases exist.

Path parameters

  • index string | array[string] Required

    Comma-separated list of data streams or indices used to limit the request. Supports wildcards (*). To target all data streams and indices, omit this parameter or use * or _all.

  • name string | array[string] Required

    Comma-separated list of aliases to check. Supports wildcards (*).

Query parameters

  • allow_no_indices boolean

    A setting that does two separate checks on the index expression. If false, the request returns an error (1) if any wildcard expression (including _all and *) resolves to zero matching indices or (2) if the complete set of resolved indices, aliases or data streams is empty after all expressions are evaluated. If true, index expressions that resolve to no indices are allowed and the request returns an empty result.

  • expand_wildcards string | array[string]

    Type of index that wildcard patterns can match. If the request can target data streams, this argument determines whether wildcard expressions match hidden data streams. Supports comma-separated values, such as open,hidden.

    Supported values include:

    • all: Match any data stream or index, including hidden ones.
    • open: Match open, non-hidden indices. Also matches any non-hidden data stream.
    • closed: Match closed, non-hidden indices. Also matches any non-hidden data stream. Data streams cannot be closed.
    • hidden: Match hidden data streams and hidden indices. Must be combined with open, closed, or both.
    • none: Wildcard expressions are not accepted.

    Values are all, open, closed, hidden, or none.

  • ignore_unavailable boolean

    If false, the request returns an error if it targets a concrete (non-wildcarded) index, alias, or data stream that is missing, closed, or otherwise unavailable. If true, unavailable concrete targets are silently ignored.

  • master_timeout string

    Period to wait for a connection to the master node. If no response is received before the timeout expires, the request fails and returns an error.

    External documentation

Responses

  • 200 application/json
HEAD /{index}/_alias/{name} 
HEAD _alias/my-alias

resp = client.indices.exists_alias(
    name="my-alias",
)
const response = await client.indices.existsAlias({
  name: "my-alias",
});
response = client.indices.exists_alias(
  name: "my-alias"
)
$resp = $client->indices()->existsAlias([
    "name" => "my-alias",
]);
curl --head -H "Authorization: ApiKey $ELASTIC_API_KEY" "$ELASTICSEARCH_URL/_alias/my-alias"
client.indices().existsAlias(e -> e
    .name("my-alias")
);