[DOCS] Add get index alias API docs (#46046)

This commit is contained in:
James Rodewig 2019-08-29 09:44:58 -04:00
parent bb49124690
commit 322d95f2f6
5 changed files with 194 additions and 119 deletions

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@ -34,6 +34,7 @@ index settings, aliases, mappings, and index templates.
[float]
[[alias-management]]
=== Alias management:
* <<indices-get-alias>>
* <<indices-alias-exists>>
* <<indices-aliases>>
@ -93,6 +94,8 @@ include::indices/get-field-mapping.asciidoc[]
include::indices/types-exists.asciidoc[]
include::indices/get-alias.asciidoc[]
include::indices/alias-exists.asciidoc[]
include::indices/aliases.asciidoc[]

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@ -37,8 +37,7 @@ HEAD /_alias/alias1
`<alias>`::
(Required, string)
Comma-separated list or wildcard expression of index alias names
used to limit the request.
include::{docdir}/rest-api/common-parms.asciidoc[tag=index-alias]
include::{docdir}/rest-api/common-parms.asciidoc[tag=index]

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@ -458,120 +458,3 @@ DELETE /logs_20162801/_alias/current_day
--------------------------------------------------
// CONSOLE
// TEST[continued]
[float]
[[alias-retrieving]]
==== Retrieving existing aliases
The get index alias API allows to filter by
alias name and index name. This api redirects to the master and fetches
the requested index aliases, if available. This api only serialises the
found index aliases.
Possible options:
[horizontal]
`index`::
The index name to get aliases for. Partial names are
supported via wildcards, also multiple index names can be specified
separated with a comma. Also the alias name for an index can be used.
`alias`::
The name of alias to return in the response. Like the index
option, this option supports wildcards and the option the specify
multiple alias names separated by a comma.
`ignore_unavailable`::
What to do if an specified index name doesn't
exist. If set to `true` then those indices are ignored.
The rest endpoint is: `/{index}/_alias/{alias}`.
[float]
===== Examples:
All aliases for the index `logs_20162801`:
[source,js]
--------------------------------------------------
GET /logs_20162801/_alias/*
--------------------------------------------------
// CONSOLE
// TEST[continued]
Response:
[source,js]
--------------------------------------------------
{
"logs_20162801" : {
"aliases" : {
"2016" : {
"filter" : {
"term" : {
"year" : 2016
}
}
}
}
}
}
--------------------------------------------------
// TESTRESPONSE
All aliases with the name 2016 in any index:
[source,js]
--------------------------------------------------
GET /_alias/2016
--------------------------------------------------
// CONSOLE
// TEST[continued]
Response:
[source,js]
--------------------------------------------------
{
"logs_20162801" : {
"aliases" : {
"2016" : {
"filter" : {
"term" : {
"year" : 2016
}
}
}
}
}
}
--------------------------------------------------
// TESTRESPONSE
All aliases that start with 20 in any index:
[source,js]
--------------------------------------------------
GET /_alias/20*
--------------------------------------------------
// CONSOLE
// TEST[continued]
Response:
[source,js]
--------------------------------------------------
{
"logs_20162801" : {
"aliases" : {
"2016" : {
"filter" : {
"term" : {
"year" : 2016
}
}
}
}
}
}
--------------------------------------------------
// TESTRESPONSE

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@ -0,0 +1,185 @@
[[indices-get-alias]]
=== Get index alias API
++++
<titleabbrev>Get index alias</titleabbrev>
++++
Returns information about one or more index aliases.
include::alias-exists.asciidoc[tag=index-alias-def]
[source,js]
----
GET /twitter/_alias/alias1
----
// CONSOLE
// TEST[setup:twitter]
// TEST[s/^/PUT twitter\/_alias\/alias1\n/]
[[get-alias-api-request]]
==== {api-request-title}
`GET /_alias`
`GET /_alias/<alias>`
`GET /<index>/_alias/<alias>`
[[get-alias-api-path-params]]
==== {api-path-parms-title}
`<alias>`::
(Optional, string)
include::{docdir}/rest-api/common-parms.asciidoc[tag=index-alias]
+
To retrieve information for all index aliases,
use a value of `_all` or `*`.
include::{docdir}/rest-api/common-parms.asciidoc[tag=index]
[[get-alias-api-query-params]]
==== {api-query-parms-title}
include::{docdir}/rest-api/common-parms.asciidoc[tag=allow-no-indices]
include::{docdir}/rest-api/common-parms.asciidoc[tag=expand-wildcards]
+
Defaults to `all`.
include::{docdir}/rest-api/common-parms.asciidoc[tag=index-ignore-unavailable]
include::{docdir}/rest-api/common-parms.asciidoc[tag=local]
[[get-alias-api-example]]
==== {api-examples-title}
[[get-alias-api-all-ex]]
===== Get all aliases for an index
You can add index aliases during index creation
using a <<indices-create-index,create index API>> request.
The following create index API request creates the `logs_20302801` index
with two aliases:
* `current_day`
* `2030`, which only returns documents
in the `logs_20302801` index
with a `year` field value of `2030`
[source,js]
--------------------------------------------------
PUT /logs_20302801
{
"aliases" : {
"current_day" : {},
"2030" : {
"filter" : {
"term" : {"year" : 2030 }
}
}
}
}
--------------------------------------------------
// CONSOLE
The following get index alias API request returns all aliases
for the index `logs_20302801`:
[source,js]
--------------------------------------------------
GET /logs_20302801/_alias/*
--------------------------------------------------
// CONSOLE
// TEST[continued]
The API returns the following response:
[source,js]
--------------------------------------------------
{
"logs_20302801" : {
"aliases" : {
"current_day" : {
},
"2030" : {
"filter" : {
"term" : {
"year" : 2030
}
}
}
}
}
}
--------------------------------------------------
// TESTRESPONSE
[[get-alias-api-named-ex]]
===== Get a specific alias
The following index alias API request returns the `2030` alias:
[source,js]
--------------------------------------------------
GET /_alias/2030
--------------------------------------------------
// CONSOLE
// TEST[continued]
The API returns the following response:
[source,js]
--------------------------------------------------
{
"logs_20302801" : {
"aliases" : {
"2030" : {
"filter" : {
"term" : {
"year" : 2030
}
}
}
}
}
}
--------------------------------------------------
// TESTRESPONSE
[[get-alias-api-wildcard-ex]]
===== Get aliases based on a wildcard
The following index alias API request returns any alias that begin with `20`:
[source,js]
--------------------------------------------------
GET /_alias/20*
--------------------------------------------------
// CONSOLE
// TEST[continued]
The API returns the following response:
[source,js]
--------------------------------------------------
{
"logs_20302801" : {
"aliases" : {
"2030" : {
"filter" : {
"term" : {
"year" : 2030
}
}
}
}
}
}
--------------------------------------------------
// TESTRESPONSE

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@ -1,4 +1,9 @@
tag::index-alias[]
Comma-separated list or wildcard expression of index alias names
used to limit the request.
end::index-alias[]
tag::allow-no-indices[]
`allow_no_indices`::
(Optional, boolean) If `true`, the request returns an error if a wildcard