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cfae69717a
PRs #73062 and #73043 repurposed the `alias` anchor for a new guide for index and data stream aliases. Previously, this anchor was used for our field alias documentation. Repurposing the anchor has caused continuity errors for users selecting different versions of the ES docs. It could also cause confusion for users with a `/current/` link to the `alias` page. This updates the anchor for the alias guide and adds a redirect page to disambiguate the `alias` anchor. It also fixes a bread crumb issue for redirects following the 'Modifying your Data' redirect page. Closes #77034.
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7 KiB
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266 lines
No EOL
7 KiB
Text
[[indices-templates-v1]]
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=== Create or update index template API
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++++
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<titleabbrev>Create or update index template (legacy)</titleabbrev>
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++++
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IMPORTANT: This documentation is about legacy index templates,
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which are deprecated and will be replaced by the composable templates introduced in {es} 7.8.
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For information about composable templates, see <<index-templates>>.
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Creates or updates an index template.
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[source,console]
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--------------------------------------------------
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PUT _template/template_1
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{
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"index_patterns": ["te*", "bar*"],
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"settings": {
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"number_of_shards": 1
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},
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"mappings": {
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"_source": {
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"enabled": false
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},
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"properties": {
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"host_name": {
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"type": "keyword"
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},
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"created_at": {
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"type": "date",
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"format": "EEE MMM dd HH:mm:ss Z yyyy"
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}
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}
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}
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}
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--------------------------------------------------
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// TESTSETUP
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//////////////////////////
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[source,console]
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--------------------------------------------------
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DELETE _template/template_*
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--------------------------------------------------
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// TEARDOWN
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//////////////////////////
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[[put-index-template-v1-api-request]]
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==== {api-request-title}
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`PUT /_template/<index-template>`
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[[put-index-template-v1-api-prereqs]]
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==== {api-prereq-title}
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* If the {es} {security-features} are enabled, you must have the
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`manage_index_templates` or `manage` <<privileges-list-cluster,cluster
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privilege>> to use this API.
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[[put-index-template-v1-api-desc]]
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==== {api-description-title}
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Index templates define <<index-modules-settings,settings>> and <<mapping,mappings>>
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that you can automatically apply when creating new indices.
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{es} applies templates to new indices
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based on an index pattern that matches the index name.
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NOTE: Composable templates always take precedence over legacy templates.
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If no composable template matches a new index,
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matching legacy templates are applied according to their order.
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Index templates are only applied during index creation.
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Changes to index templates do not affect existing indices.
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Settings and mappings specified in <<indices-create-index, create index>> API requests
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override any settings or mappings specified in an index template.
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===== Comments in index templates
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You can use C-style /* */ block comments in index templates.
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You can include comments anywhere in the request body,
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except before the opening curly bracket.
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[[getting-v1]]
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===== Getting templates
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See <<indices-get-template-v1>>.
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[[put-index-template-v1-api-path-params]]
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==== {api-path-parms-title}
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`<index-template>`::
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(Required, string)
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Name of the index template to create.
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[[put-index-template-v1-api-query-params]]
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==== {api-query-parms-title}
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`create`::
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(Optional, Boolean)
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If `true`, this request cannot replace or update existing index templates.
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Defaults to `false`.
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`order`::
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(Optional,integer)
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Order in which {es} applies this template
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if index matches multiple templates.
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+
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Templates with lower `order` values are merged first.
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Templates with higher `order` values are merged later,
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overriding templates with lower values.
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=master-timeout]
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[role="child_attributes"]
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[[put-index-template-v1-api-request-body]]
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==== {api-request-body-title}
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`index_patterns`::
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(Required, array of strings)
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Array of wildcard expressions
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used to match the names of indices during creation.
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`aliases`::
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(Optional, object of objects) Aliases for the index.
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+
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include::{es-repo-dir}/indices/create-index.asciidoc[tag=aliases-props]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=mappings]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=settings]
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`version`::
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(Optional, integer)
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Version number used to manage index templates externally.
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This number is not automatically generated by {es}.
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[[put-index-template-v1-api-example]]
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==== {api-examples-title}
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===== Index template with index aliases
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You can include <<aliases,index aliases>> in an index template.
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[source,console]
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--------------------------------------------------
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PUT _template/template_1
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{
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"index_patterns" : ["te*"],
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"settings" : {
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"number_of_shards" : 1
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},
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"aliases" : {
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"alias1" : {},
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"alias2" : {
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"filter" : {
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"term" : {"user.id" : "kimchy" }
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},
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"routing" : "shard-1"
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},
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"{index}-alias" : {} <1>
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}
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}
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--------------------------------------------------
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<1> the `{index}` placeholder in the alias name will be replaced with the
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actual index name that the template gets applied to, during index creation.
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[[multiple-templates-v1]]
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===== Indices matching multiple templates
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Multiple index templates can potentially match an index, in this case,
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both the settings and mappings are merged into the final configuration
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of the index. The order of the merging can be controlled using the
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`order` parameter, with lower order being applied first, and higher
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orders overriding them. For example:
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[source,console]
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--------------------------------------------------
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PUT /_template/template_1
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{
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"index_patterns" : ["te*"],
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"order" : 0,
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"settings" : {
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"number_of_shards" : 1
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},
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"mappings" : {
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"_source" : { "enabled" : false }
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}
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}
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PUT /_template/template_2
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{
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"index_patterns" : ["tes*"],
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"order" : 1,
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"settings" : {
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"number_of_shards" : 1
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},
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"mappings" : {
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"_source" : { "enabled" : true }
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}
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}
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--------------------------------------------------
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The above will disable storing the `_source`, but
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for indices that start with `tes*`, `_source` will still be enabled.
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Note, for mappings, the merging is "deep", meaning that specific
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object/property based mappings can easily be added/overridden on higher
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order templates, with lower order templates providing the basis.
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NOTE: Multiple matching templates with the same order value will
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result in a non-deterministic merging order.
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[[versioning-templates-v1]]
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===== Template versioning
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You can use the `version` parameter
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to add an optional version number to an index template.
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External systems can use these version numbers
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to simplify template management.
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The `version` parameter is completely optional
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and not automatically generated by {es}.
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To unset a `version`,
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replace the template without specifying one.
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[source,console]
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--------------------------------------------------
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PUT /_template/template_1
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{
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"index_patterns" : ["my-index-*"],
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"order" : 0,
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"settings" : {
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"number_of_shards" : 1
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},
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"version": 123
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}
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--------------------------------------------------
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To check the `version`,
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you can use the <<indices-get-template, get index template>> API
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with the <<common-options-response-filtering, `filter_path`>> query parameter
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to return only the version number:
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[source,console]
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--------------------------------------------------
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GET /_template/template_1?filter_path=*.version
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--------------------------------------------------
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// TEST[continued]
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The API returns the following response:
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[source,console-result]
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--------------------------------------------------
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{
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"template_1" : {
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"version" : 123
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}
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}
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-------------------------------------------------- |