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Add template simulation API for simulating template composition (#56842)
This adds an API for simulating template composition with or without an index template.
It looks like:
```
POST /_index_template/_simulate/my-template
```
To simulate a template named `my-template` that already exists, or, to simulate a template that does
not already exist:
```
POST /_index_template/_simulate
{
"index_patterns": ["my-index"]
"composed_of": ["ct1", "ct2"],
}
```
This is related to #55686, which adds an API to simulate composition based on an index name (hence
the `_simulate_index` vs `_simulate`).
This commit also adds reference documentation for both simulation APIs.
Relates to #53101
Resolves #56390
Resolves #56255- Loading branch information
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51 changes: 51 additions & 0 deletions
51
rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_template.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| { | ||
| "indices.simulate_template":{ | ||
| "documentation":{ | ||
| "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html", | ||
| "description": "Simulate resolving the given template name or body" | ||
| }, | ||
| "stability":"stable", | ||
| "url":{ | ||
| "paths":[ | ||
| { | ||
| "path":"/_index_template/_simulate", | ||
| "methods":[ | ||
| "POST" | ||
| ] | ||
| }, | ||
| { | ||
| "path":"/_index_template/_simulate/{name}", | ||
| "methods":[ | ||
| "POST" | ||
| ], | ||
| "parts":{ | ||
| "name":{ | ||
| "type":"string", | ||
| "description":"The name of the index template" | ||
| } | ||
| } | ||
| } | ||
| ] | ||
| }, | ||
| "params":{ | ||
| "create":{ | ||
| "type":"boolean", | ||
| "description":"Whether the index template we optionally defined in the body should only be dry-run added if new or can also replace an existing one", | ||
| "default":false | ||
| }, | ||
| "cause":{ | ||
| "type":"string", | ||
| "description":"User defined reason for dry-run creating the new template for simulation purposes", | ||
| "default":false | ||
| }, | ||
| "master_timeout":{ | ||
| "type":"time", | ||
| "description":"Specify timeout for connection to master" | ||
| } | ||
| }, | ||
| "body":{ | ||
| "description":"New index template definition to be simulated, if no index template name is specified", | ||
| "required":false | ||
| } | ||
| } | ||
| } |
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rest-api-spec/src/main/resources/rest-api-spec/test/indices.simulate_template/10_basic.yml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| --- | ||
| "Simulate template without a template in the body": | ||
| - skip: | ||
| version: " - 7.99.99" | ||
| reason: "not yet backported" | ||
| features: ["default_shards"] | ||
|
|
||
| - do: | ||
| indices.put_index_template: | ||
| name: my-template | ||
| body: | ||
| index_patterns: other | ||
| template: | ||
| settings: | ||
| number_of_shards: 1 | ||
| number_of_replicas: 0 | ||
| mappings: | ||
| properties: | ||
| field: | ||
| type: keyword | ||
|
|
||
| - do: | ||
| indices.simulate_template: | ||
| name: my-template | ||
|
|
||
| - match: {template.settings.index.number_of_shards: "1"} | ||
| - match: {template.settings.index.number_of_replicas: "0"} | ||
| - match: {template.mappings.properties.field.type: "keyword"} | ||
| - match: {overlapping: []} | ||
|
|
||
| --- | ||
| "Simulate index template specifying a new template": | ||
| - skip: | ||
| version: " - 7.99.99" | ||
| reason: "not yet backported" | ||
| features: ["default_shards"] | ||
|
|
||
| - do: | ||
| indices.put_index_template: | ||
| name: existing_test | ||
| body: | ||
| index_patterns: te* | ||
| priority: 10 | ||
| template: | ||
| settings: | ||
| number_of_shards: 1 | ||
| number_of_replicas: 0 | ||
| mappings: | ||
| properties: | ||
| field: | ||
| type: keyword | ||
|
|
||
| - do: | ||
| cluster.put_component_template: | ||
| name: ct | ||
| body: | ||
| template: | ||
| settings: | ||
| index.number_of_replicas: 2 | ||
| mappings: | ||
| properties: | ||
| ct_field: | ||
| type: keyword | ||
|
|
||
| - do: | ||
| indices.simulate_template: | ||
| body: | ||
| index_patterns: te* | ||
| priority: 15 | ||
| template: | ||
| settings: | ||
| index.blocks.write: true | ||
| aliases: | ||
| test_alias: {} | ||
| composed_of: ["ct"] | ||
|
|
||
| - match: {template.settings.index.blocks.write: "true"} | ||
| - match: {template.settings.index.number_of_replicas: "2"} | ||
| - match: {template.mappings.properties.ct_field.type: "keyword"} | ||
| - match: {overlapping.0.name: existing_test} | ||
| - match: {overlapping.0.index_patterns: ["te*"]} | ||
| - length: {template.aliases: 1} | ||
| - is_true: template.aliases.test_alias | ||
|
|
||
| --- | ||
| "Simulate template matches overlapping V1 and V2 templates": | ||
| - skip: | ||
| version: " - 7.99.99" | ||
| reason: "not yet backported" | ||
| features: ["allowed_warnings", "default_shards"] | ||
|
|
||
| - do: | ||
| indices.put_template: | ||
| name: v1_template | ||
| body: | ||
| index_patterns: [t*, t1*] | ||
| settings: | ||
| number_of_shards: 5 | ||
|
|
||
| - do: | ||
| allowed_warnings: | ||
| - "index template [v2_template] has index patterns [te*] matching patterns from existing older templates [v1_template] with patterns | ||
| (v1_template => [t*, t1*]); this template [v2_template] will take precedence during new index creation" | ||
| indices.put_index_template: | ||
| name: v2_template | ||
| body: | ||
| index_patterns: te* | ||
| priority: 10 | ||
| template: | ||
| settings: | ||
| number_of_shards: 10 | ||
| number_of_replicas: 2 | ||
| mappings: | ||
| properties: | ||
| field: | ||
| type: text | ||
|
|
||
| - do: | ||
| allowed_warnings: | ||
| - "index template [winning_v2_template] has index patterns [te*] matching patterns from existing older templates [v1_template] with patterns | ||
| (v1_template => [t*, t1*]); this template [winning_v2_template] will take precedence during new index creation" | ||
| indices.put_index_template: | ||
| name: winning_v2_template | ||
| body: | ||
| index_patterns: te* | ||
| priority: 20 | ||
| template: | ||
| settings: | ||
| number_of_shards: 1 | ||
| number_of_replicas: 0 | ||
| mappings: | ||
| properties: | ||
| field: | ||
| type: keyword | ||
|
|
||
| - do: | ||
| indices.simulate_template: | ||
| name: winning_v2_template | ||
|
|
||
| - match: {template.settings.index.number_of_shards: "1"} | ||
| - match: {template.settings.index.number_of_replicas: "0"} | ||
| - match: {template.mappings.properties.field.type: "keyword"} | ||
| - match: {overlapping.0.name: v1_template} | ||
| - match: {overlapping.0.index_patterns: ["t*", "t1*"]} | ||
| - match: {overlapping.1.name: v2_template} | ||
| - match: {overlapping.1.index_patterns: ["te*"]} |
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