OpenSearch/docs/reference/indices/add-alias.asciidoc

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[[indices-add-alias]]
=== Add index alias API
++++
<titleabbrev>Add index alias</titleabbrev>
++++
Creates or updates an index alias.
include::{es-repo-dir}/glossary.asciidoc[tag=index-alias-desc]
[source,console]
----
PUT /my-index-000001/_alias/alias1
----
// TEST[setup:my_index]
[[add-alias-api-request]]
==== {api-request-title}
`PUT /<index>/_alias/<alias>`
`POST /<index>/_alias/<alias>`
`PUT /<index>/_aliases/<alias>`
`POST /<index>/_aliases/<alias>`
[[add-alias-api-path-params]]
==== {api-path-parms-title}
`<index>`::
(Required, string)
Comma-separated list or wildcard expression of index names
to add to the alias.
+
To add all indices in the cluster to the alias,
use a value of `_all`.
+
NOTE: You cannot add <<data-streams,data streams>> to an index alias.
`<alias>`::
(Required, string)
Name of the index alias to create or update.
[[add-alias-api-query-params]]
==== {api-query-parms-title}
include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=timeoutparms]
[[add-alias-api-request-body]]
==== {api-request-body-title}
`filter`::
(Required, query object)
include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=index-alias-filter]
include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=index-routing]
[[add-alias-api-example]]
==== {api-examples-title}
[[alias-adding]]
===== Add a time-based alias
The following request creates an alias, `2030`,
for the `logs_20302801` index.
[source,console]
--------------------------------------------------
PUT /logs_20302801/_alias/2030
--------------------------------------------------
// TEST[s/^/PUT logs_20302801\n/]
[[add-alias-api-user-ex]]
===== Add a user-based alias
First, create an index, `users`,
with a mapping for the `user_id` field:
[source,console]
--------------------------------------------------
PUT /users
{
"mappings" : {
"properties" : {
"user_id" : {"type" : "integer"}
}
}
}
--------------------------------------------------
Then add the index alias for a specific user, `user_12`:
[source,console]
--------------------------------------------------
PUT /users/_alias/user_12
{
"routing" : "12",
"filter" : {
"term" : {
"user_id" : 12
}
}
}
--------------------------------------------------
// TEST[continued]
[[alias-index-creation]]
===== Add an alias during index creation
You can use the <<create-index-aliases,create index API>>
to add an index alias during index creation.
[source,console]
--------------------------------------------------
PUT /logs_20302801
{
"mappings": {
"properties": {
"year": { "type": "integer" }
}
},
"aliases": {
"current_day": {},
"2030": {
"filter": {
"term": { "year": 2030 }
}
}
}
}
--------------------------------------------------