264 lines
6.9 KiB
Plaintext
264 lines
6.9 KiB
Plaintext
[[indices-templates-v1]]
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=== Put index template API
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++++
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<titleabbrev>Put index template</titleabbrev>
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++++
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This documentation is about legacy index templates, which are deprecated and will be replaced by
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composable templates. For information about composable templates, see <<indices-templates>>.
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[NOTE]
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====
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In {es} 7.8 composable templates were introduced. When a composable template matches a given index
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it always takes precedence over a legacy template. If no composable template matches, a legacy
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template may still match and be applied.
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====
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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-desc]]
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==== {api-description-title}
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Use the PUT index template API
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to create or update an index template.
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// tag::index-template-def[]
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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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// end::index-template-def[]
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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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[[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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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=aliases]
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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 <<indices-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" : "kimchy" }
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},
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"routing" : "kimchy"
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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" : ["*"],
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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" : ["te*"],
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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 `te*`, `_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" : ["*"],
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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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--------------------------------------------------
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