Add downsampling_method to the data stream lifecycle (#5594)

* Fix data stream lifecycle type, to correctly handle downsampling.

* Add sampling method to data stream lifecycle

* Run make contrib

---------

Co-authored-by: Quentin Pradet <[email protected]>

Author: gmarouli

output/openapi/elasticsearch-openapi.json

@@ -21,6 +21,7 @@ import { ByteSize } from '@_types/common'
 import { long } from '@_types/Numeric'
 import { Duration } from '@_types/Time'
 import { DownsamplingRound } from '@indices/_types/DownsamplingRound'
+import { SamplingMethod } from './Downsample'
 
 /**
  * Data stream lifecycle denotes that a data stream is managed by the data stream lifecycle and contains the configuration.
@@ -36,6 +37,11 @@ export class DataStreamLifecycle {
    * The list of downsampling rounds to execute as part of this downsampling configuration
    */
   downsampling?: DownsamplingRound[]
+  /**
+   * The method used to downsample the data. There are two options `aggregate` and `last_value`. It requires
+   * `downsampling` to be defined. Defaults to `aggregate`.
+   */
+  downsampling_method?: SamplingMethod
   /**
    * If defined, it turns data stream lifecycle on/off (`true`/`false`) for this data stream. A data stream lifecycle
    * that's disabled (enabled: `false`) will have no effect on the data stream.

output/openapi/elasticsearch-serverless-openapi.json

@@ -30,7 +30,7 @@ export class DownsampleConfig {
   sampling_method?: SamplingMethod
 }
 
-enum SamplingMethod {
+export enum SamplingMethod {
   aggregate,
   last_value
 }

output/schema/schema.json

@@ -20,6 +20,7 @@
 import { RequestBase } from '@_types/Base'
 import { DataStreamNames, ExpandWildcards } from '@_types/common'
 import { Duration } from '@_types/Time'
+import { SamplingMethod } from '@indices/_types/Downsample'
 import { DownsamplingRound } from '@indices/_types/DownsamplingRound'
 
 /**
@@ -71,7 +72,7 @@ export interface Request extends RequestBase {
   }
   /*
    * This is DataStreamLifecycle from @indices/_types/DataStreamLifecycle.ts,
-   * but kept as a properties body to avoid a breaking change
+   * but kept as separate properties to avoid a breaking change
    */
   body: {
     /**
@@ -84,6 +85,11 @@ export interface Request extends RequestBase {
      * The downsampling configuration to execute for the managed backing index after rollover.
      */
     downsampling?: DownsamplingRound[]
+    /**
+     * The method used to downsample the data. There are two options `aggregate` and `last_value`. It requires
+     * `downsampling` to be defined. Defaults to `aggregate`.
+     */
+    downsampling_method?: SamplingMethod
     /**
      * If defined, it turns data stream lifecycle on/off (`true`/`false`) for this data stream. A data stream lifecycle
      * that's disabled (enabled: `false`) will have no effect on the data stream.