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Simulate pipeline
Introduced 1.0
Use the simulate ingest pipeline API operation to run or test the pipeline.
Path and HTTP methods
The following requests simulate the latest ingest pipeline created:
GET _ingest/pipeline/_simulate
POST _ingest/pipeline/_simulate
The following requests simulate a single pipeline based on the pipeline ID:
GET _ingest/pipeline/<pipeline-id>/_simulate
POST _ingest/pipeline/<pipeline-id>/_simulate
Request body fields
The following table lists the request body fields used to run a pipeline.
Field | Required | Type | Description |
---|---|---|---|
docs | Required | Array | The documents to be used to test the pipeline. |
pipeline | Optional | Object | The pipeline to be simulated. If the pipeline identifier is not included, then the response simulates the latest pipeline created. |
The docs
field can include subfields listed in the following table.
Field | Required | Type | Description |
---|---|---|---|
source | Required | Object | The document’s JSON body. |
id | Optional | String | A unique document identifier. The identifier cannot be used elsewhere in the index. |
index | Optional | String | The index where the document’s transformed data appears. |
Query parameters
The following table lists the query parameters for running a pipeline.
Parameter | Type | Description |
---|---|---|
verbose | Boolean | Verbose mode. Display data output for each processor in the executed pipeline. |
Example: Specify a pipeline in the path
POST /_ingest/pipeline/my-pipeline/_simulate
{
"docs": [
{
"_index": "my-index",
"_id": "1",
"_source": {
"grad_year": 2024,
"graduated": false,
"name": "John Doe"
}
},
{
"_index": "my-index",
"_id": "2",
"_source": {
"grad_year": 2025,
"graduated": false,
"name": "Jane Doe"
}
}
]
}
The request returns the following response:
{
"docs": [
{
"doc": {
"_index": "my-index",
"_id": "1",
"_source": {
"name": "JOHN DOE",
"grad_year": 2023,
"graduated": true
},
"_ingest": {
"timestamp": "2023-06-20T23:19:54.635306588Z"
}
}
},
{
"doc": {
"_index": "my-index",
"_id": "2",
"_source": {
"name": "JANE DOE",
"grad_year": 2023,
"graduated": true
},
"_ingest": {
"timestamp": "2023-06-20T23:19:54.635746046Z"
}
}
}
]
}
Example: Verbose mode
When the previous request is run with the verbose
parameter set to true
, the response shows the sequence of transformations for each document. For example, for the document with the ID 1
, the response contains the results of applying each processor in the pipeline in sequence:
{
"docs": [
{
"processor_results": [
{
"processor_type": "set",
"status": "success",
"description": "Sets the graduation year to 2023",
"doc": {
"_index": "my-index",
"_id": "1",
"_source": {
"name": "John Doe",
"grad_year": 2023,
"graduated": false
},
"_ingest": {
"pipeline": "my-pipeline",
"timestamp": "2023-06-20T23:23:26.656564631Z"
}
}
},
{
"processor_type": "set",
"status": "success",
"description": "Sets 'graduated' to true",
"doc": {
"_index": "my-index",
"_id": "1",
"_source": {
"name": "John Doe",
"grad_year": 2023,
"graduated": true
},
"_ingest": {
"pipeline": "my-pipeline",
"timestamp": "2023-06-20T23:23:26.656564631Z"
}
}
},
{
"processor_type": "uppercase",
"status": "success",
"doc": {
"_index": "my-index",
"_id": "1",
"_source": {
"name": "JOHN DOE",
"grad_year": 2023,
"graduated": true
},
"_ingest": {
"pipeline": "my-pipeline",
"timestamp": "2023-06-20T23:23:26.656564631Z"
}
}
}
]
}
]
}
Example: Specify a pipeline in the request body
Alternatively, you can specify a pipeline directly in the request body without first creating a pipeline:
POST /_ingest/pipeline/_simulate
{
"pipeline" :
{
"description": "Splits text on white space characters",
"processors": [
{
"csv" : {
"field" : "name",
"separator": ",",
"target_fields": ["last_name", "first_name"],
"trim": true
}
},
{
"uppercase": {
"field": "last_name"
}
}
]
},
"docs": [
{
"_index": "second-index",
"_id": "1",
"_source": {
"name": "Doe,John"
}
},
{
"_index": "second-index",
"_id": "2",
"_source": {
"name": "Doe, Jane"
}
}
]
}
Response
The request returns the following response:
{
"docs": [
{
"doc": {
"_index": "second-index",
"_id": "1",
"_source": {
"name": "Doe,John",
"last_name": "DOE",
"first_name": "John"
},
"_ingest": {
"timestamp": "2023-08-24T19:20:44.816219673Z"
}
}
},
{
"doc": {
"_index": "second-index",
"_id": "2",
"_source": {
"name": "Doe, Jane",
"last_name": "DOE",
"first_name": "Jane"
},
"_ingest": {
"timestamp": "2023-08-24T19:20:44.816492381Z"
}
}
}
]
}