Backport: Add pipeline name to ingest metadata (#51050)

Backport: #50467

This commit adds the name of the current pipeline to ingest metadata.
This pipeline name is accessible under the following key: '_ingest.pipeline'.

Example usage in pipeline:
PUT /_ingest/pipeline/2
{
    "processors": [
        {
            "set": {
                "field": "pipeline_name",
                "value": "{{_ingest.pipeline}}"
            }
        }
    ]
}

Closes #42106

docs/reference/ingest/apis/simulate-pipeline.asciidoc

@@ -355,7 +355,8 @@ The API returns the following response:
                      "foo": "bar"
                   },
                   "_ingest": {
-                     "timestamp": "2017-05-04T22:46:09.674Z"
+                     "timestamp": "2017-05-04T22:46:09.674Z",
+                     "pipeline": "_simulate_pipeline"
                   }
                }
             },
@@ -370,7 +371,8 @@ The API returns the following response:
                      "foo": "bar"
                   },
                   "_ingest": {
-                     "timestamp": "2017-05-04T22:46:09.675Z"
+                     "timestamp": "2017-05-04T22:46:09.675Z",
+                     "pipeline": "_simulate_pipeline"
                   }
                }
             }
@@ -388,7 +390,8 @@ The API returns the following response:
                      "foo": "rab"
                   },
                   "_ingest": {
-                     "timestamp": "2017-05-04T22:46:09.676Z"
+                     "timestamp": "2017-05-04T22:46:09.676Z",
+                     "pipeline": "_simulate_pipeline"
                   }
                }
             },
@@ -403,7 +406,8 @@ The API returns the following response:
                      "foo": "rab"
                   },
                   "_ingest": {
-                     "timestamp": "2017-05-04T22:46:09.677Z"
+                     "timestamp": "2017-05-04T22:46:09.677Z",
+                     "pipeline": "_simulate_pipeline"
                   }
                }
             }

docs/reference/ingest/processors/pipeline.asciidoc

@@ -21,6 +21,8 @@ include::common-options.asciidoc[]
 --------------------------------------------------
 // NOTCONSOLE
 
+The name of the current pipeline can be accessed from the `_ingest.pipeline` ingest metadata key.
+
 An example of using this processor for nesting pipelines would be:
 
 Define an inner pipeline:

modules/ingest-common/src/test/resources/rest-api-spec/test/ingest/210_pipeline_processor.yml

@@ -202,3 +202,81 @@ teardown:
           }
   - match: { error.root_cause.0.type: "illegal_state_exception" }
   - match: { error.root_cause.0.reason: "Pipeline processor configured for non-existent pipeline [legal-department]" }
+
+---
+"Test _ingest.pipeline metadata":
+  - do:
+      ingest.put_pipeline:
+        id: "pipeline1"
+        body:  >
+          {
+            "processors" : [
+              {
+                "append" : {
+                  "field": "pipelines",
+                  "value": "{{_ingest.pipeline}}"
+                }
+              },
+              {
+                "pipeline" : {
+                  "name": "another_pipeline"
+                }
+              }
+            ]
+          }
+  - match: { acknowledged: true }
+
+  - do:
+      ingest.put_pipeline:
+        id: "another_pipeline"
+        body:  >
+          {
+            "processors" : [
+              {
+                "append" : {
+                  "field": "pipelines",
+                  "value": "{{_ingest.pipeline}}"
+                }
+              },
+              {
+                "pipeline" : {
+                  "name": "another_pipeline2"
+                }
+              }
+            ]
+          }
+  - match: { acknowledged: true }
+
+  - do:
+      ingest.put_pipeline:
+        id: "another_pipeline2"
+        body:  >
+          {
+            "processors" : [
+              {
+                "append" : {
+                  "field": "pipelines",
+                  "value": "{{_ingest.pipeline}}"
+                }
+              }
+            ]
+          }
+  - match: { acknowledged: true }
+
+  - do:
+      index:
+        index: test
+        id: 1
+        pipeline: "pipeline1"
+        body: >
+          {
+          }
+
+  - do:
+      get:
+        index: test
+        id: 1
+  - length: { _source.pipelines: 3 }
+  - match: { _source.pipelines.0: "pipeline1" }
+  - match: { _source.pipelines.1: "another_pipeline" }
+  - match: { _source.pipelines.2: "another_pipeline2" }

modules/ingest-common/src/test/resources/rest-api-spec/test/ingest/90_simulate.yml

@@ -291,26 +291,30 @@ teardown:
   - length: { docs.0.processor_results.0.doc._source: 2 }
   - match: { docs.0.processor_results.0.doc._source.foo.bar.0.item: "HELLO" }
   - match: { docs.0.processor_results.0.doc._source.field2.value: "_value" }
-  - length: { docs.0.processor_results.0.doc._ingest: 1 }
+  - length: { docs.0.processor_results.0.doc._ingest: 2 }
   - is_true: docs.0.processor_results.0.doc._ingest.timestamp
+  - is_true: docs.0.processor_results.0.doc._ingest.pipeline
   - length: { docs.0.processor_results.1.doc._source: 3 }
   - match: { docs.0.processor_results.1.doc._source.foo.bar.0.item: "HELLO" }
   - match: { docs.0.processor_results.1.doc._source.field2.value: "_value" }
   - match: { docs.0.processor_results.1.doc._source.field3: "third_val" }
-  - length: { docs.0.processor_results.1.doc._ingest: 1 }
+  - length: { docs.0.processor_results.1.doc._ingest: 2 }
   - is_true: docs.0.processor_results.1.doc._ingest.timestamp
+  - is_true: docs.0.processor_results.1.doc._ingest.pipeline
   - length: { docs.0.processor_results.2.doc._source: 3 }
   - match: { docs.0.processor_results.2.doc._source.foo.bar.0.item: "HELLO" }
   - match: { docs.0.processor_results.2.doc._source.field2.value: "_VALUE" }
   - match: { docs.0.processor_results.2.doc._source.field3: "third_val" }
-  - length: { docs.0.processor_results.2.doc._ingest: 1 }
+  - length: { docs.0.processor_results.2.doc._ingest: 2 }
   - is_true: docs.0.processor_results.2.doc._ingest.timestamp
+  - is_true: docs.0.processor_results.2.doc._ingest.pipeline
   - length: { docs.0.processor_results.3.doc._source: 3 }
   - match: { docs.0.processor_results.3.doc._source.foo.bar.0.item: "hello" }
   - match: { docs.0.processor_results.3.doc._source.field2.value: "_VALUE" }
   - match: { docs.0.processor_results.3.doc._source.field3: "third_val" }
-  - length: { docs.0.processor_results.3.doc._ingest: 1 }
+  - length: { docs.0.processor_results.3.doc._ingest: 2 }
   - is_true: docs.0.processor_results.3.doc._ingest.timestamp
+  - is_true: docs.0.processor_results.3.doc._ingest.pipeline
 
 ---
 "Test simulate with exception thrown":
@@ -404,12 +408,14 @@ teardown:
   - match: { docs.1.processor_results.0.doc._index: "index" }
   - match: { docs.1.processor_results.0.doc._source.foo: 5 }
   - match: { docs.1.processor_results.0.doc._source.bar: "hello" }
-  - length: { docs.1.processor_results.0.doc._ingest: 1 }
+  - length: { docs.1.processor_results.0.doc._ingest: 2 }
   - is_true: docs.1.processor_results.0.doc._ingest.timestamp
+  - is_true: docs.1.processor_results.0.doc._ingest.pipeline
   - match: { docs.1.processor_results.1.doc._source.foo: 5 }
   - match: { docs.1.processor_results.1.doc._source.bar: "HELLO" }
-  - length: { docs.1.processor_results.1.doc._ingest: 1 }
+  - length: { docs.1.processor_results.1.doc._ingest: 2 }
   - is_true: docs.1.processor_results.1.doc._ingest.timestamp
+  - is_true: docs.1.processor_results.1.doc._ingest.pipeline
 
 ---
 "Test verbose simulate with on_failure":

server/src/main/java/org/elasticsearch/ingest/IngestDocument.java

@@ -648,8 +648,14 @@ private static Object deepCopy(Object value) {
      */
     public void executePipeline(Pipeline pipeline, BiConsumer<IngestDocument, Exception> handler) {
         if (executedPipelines.add(pipeline.getId())) {
+            Object previousPipeline = ingestMetadata.put("pipeline", pipeline.getId());
             pipeline.execute(this, (result, e) -> {
                 executedPipelines.remove(pipeline.getId());
+                if (previousPipeline != null) {
+                    ingestMetadata.put("pipeline", previousPipeline);
+                } else {
+                    ingestMetadata.remove("pipeline");
+                }
                 handler.accept(result, e);
             });
         } else {

server/src/main/java/org/elasticsearch/ingest/PipelineProcessor.java

@@ -31,7 +31,7 @@ public class PipelineProcessor extends AbstractProcessor {
     private final TemplateScript.Factory pipelineTemplate;
     private final IngestService ingestService;
 
-    private PipelineProcessor(String tag, TemplateScript.Factory pipelineTemplate, IngestService ingestService) {
+    PipelineProcessor(String tag, TemplateScript.Factory pipelineTemplate, IngestService ingestService) {
         super(tag);
         this.pipelineTemplate = pipelineTemplate;
         this.ingestService = ingestService;

server/src/test/java/org/elasticsearch/action/ingest/SimulateExecutionServiceTests.java

@@ -91,23 +91,17 @@ public void testExecuteVerboseItem() throws Exception {
         assertThat(actualItemResponse, instanceOf(SimulateDocumentVerboseResult.class));
         SimulateDocumentVerboseResult simulateDocumentVerboseResult = (SimulateDocumentVerboseResult) actualItemResponse;
         assertThat(simulateDocumentVerboseResult.getProcessorResults().size(), equalTo(2));
-        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getProcessorTag(), equalTo("test-id"));
-        IngestDocument firstProcessorIngestDocument = simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument();
-        assertThat(firstProcessorIngestDocument, not(sameInstance(this.ingestDocument)));
-        assertIngestDocument(firstProcessorIngestDocument, this.ingestDocument);
-        assertThat(firstProcessorIngestDocument.getSourceAndMetadata(), not(sameInstance(this.ingestDocument.getSourceAndMetadata())));
 
+        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getProcessorTag(), equalTo("test-id"));
+        assertVerboseResult(simulateDocumentVerboseResult.getProcessorResults().get(0), pipeline.getId(), ingestDocument);
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getFailure(), nullValue());
+
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(1).getProcessorTag(), equalTo("test-id"));
-        IngestDocument secondProcessorIngestDocument = simulateDocumentVerboseResult.getProcessorResults().get(1).getIngestDocument();
-        assertThat(secondProcessorIngestDocument, not(sameInstance(this.ingestDocument)));
-        assertIngestDocument(secondProcessorIngestDocument, this.ingestDocument);
-        assertThat(secondProcessorIngestDocument.getSourceAndMetadata(), not(sameInstance(this.ingestDocument.getSourceAndMetadata())));
-        assertThat(secondProcessorIngestDocument.getSourceAndMetadata(),
-            not(sameInstance(firstProcessorIngestDocument.getSourceAndMetadata())));
+        assertVerboseResult(simulateDocumentVerboseResult.getProcessorResults().get(1), pipeline.getId(), ingestDocument);
+        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(1).getIngestDocument().getSourceAndMetadata(),
+            not(sameInstance(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument().getSourceAndMetadata())));
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(1).getFailure(), nullValue());
     }
-
     public void testExecuteItem() throws Exception {
         TestProcessor processor = new TestProcessor("processor_0", "mock", ingestDocument -> {});
         Pipeline pipeline = new Pipeline("_id", "_description", version, new CompoundProcessor(processor, processor));
@@ -147,10 +141,7 @@ public void testExecuteVerboseItemExceptionWithoutOnFailure() throws Exception {
         assertThat(simulateDocumentVerboseResult.getProcessorResults().size(), equalTo(2));
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getProcessorTag(), equalTo("processor_0"));
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getFailure(), nullValue());
-        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument(), not(sameInstance(ingestDocument)));
-        assertIngestDocument(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument(), ingestDocument);
-        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument().getSourceAndMetadata(),
-                not(sameInstance(ingestDocument.getSourceAndMetadata())));
+        assertVerboseResult(simulateDocumentVerboseResult.getProcessorResults().get(0), pipeline.getId(), ingestDocument);
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(1).getProcessorTag(), equalTo("processor_1"));
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(1).getIngestDocument(), nullValue());
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(1).getFailure(), instanceOf(RuntimeException.class));
@@ -191,14 +182,12 @@ public void testExecuteVerboseItemWithOnFailure() throws Exception {
         metadata.put(CompoundProcessor.ON_FAILURE_PROCESSOR_TYPE_FIELD, "mock");
         metadata.put(CompoundProcessor.ON_FAILURE_PROCESSOR_TAG_FIELD, "processor_0");
         metadata.put(CompoundProcessor.ON_FAILURE_MESSAGE_FIELD, "processor failed");
-        assertIngestDocument(simulateDocumentVerboseResult.getProcessorResults().get(1).getIngestDocument(),
-                ingestDocumentWithOnFailureMetadata);
-
+        assertVerboseResult(simulateDocumentVerboseResult.getProcessorResults().get(1), pipeline.getId(),
+            ingestDocumentWithOnFailureMetadata);
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(1).getFailure(), nullValue());
 
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(2).getProcessorTag(), equalTo("processor_2"));
-        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(2).getIngestDocument(), not(sameInstance(ingestDocument)));
-        assertIngestDocument(simulateDocumentVerboseResult.getProcessorResults().get(2).getIngestDocument(), ingestDocument);
+        assertVerboseResult(simulateDocumentVerboseResult.getProcessorResults().get(2), pipeline.getId(), ingestDocument);
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(2).getFailure(), nullValue());
     }
 
@@ -221,10 +210,7 @@ public void testExecuteVerboseItemExceptionWithIgnoreFailure() throws Exception
         assertThat(simulateDocumentVerboseResult.getProcessorResults().size(), equalTo(1));
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getProcessorTag(), equalTo("processor_0"));
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getFailure(), sameInstance(exception));
-        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument(), not(sameInstance(ingestDocument)));
-        assertIngestDocument(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument(), ingestDocument);
-        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument().getSourceAndMetadata(),
-                not(sameInstance(ingestDocument.getSourceAndMetadata())));
+        assertVerboseResult(simulateDocumentVerboseResult.getProcessorResults().get(0), pipeline.getId(), ingestDocument);
     }
 
     public void testExecuteVerboseItemWithoutExceptionAndWithIgnoreFailure() throws Exception {
@@ -245,10 +231,7 @@ public void testExecuteVerboseItemWithoutExceptionAndWithIgnoreFailure() throws
         assertThat(simulateDocumentVerboseResult.getProcessorResults().size(), equalTo(1));
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getProcessorTag(), equalTo("processor_0"));
         assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getFailure(), nullValue());
-        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument(), not(sameInstance(ingestDocument)));
-        assertIngestDocument(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument(), ingestDocument);
-        assertThat(simulateDocumentVerboseResult.getProcessorResults().get(0).getIngestDocument().getSourceAndMetadata(),
-                not(sameInstance(ingestDocument.getSourceAndMetadata())));
+        assertVerboseResult(simulateDocumentVerboseResult.getProcessorResults().get(0), pipeline.getId(), ingestDocument);
     }
 
     public void testExecuteItemWithFailure() throws Exception {
@@ -392,4 +375,19 @@ public String getType() {
         }
     }
 
+    private static void assertVerboseResult(SimulateProcessorResult result,
+                                            String expectedPipelineId,
+                                            IngestDocument expectedIngestDocument) {
+        IngestDocument simulateVerboseIngestDocument = result.getIngestDocument();
+        // Remove and compare pipeline key. It is always in the verbose result,
+        // since that is a snapshot of how the ingest doc looks during pipeline execution, but not in the final ingestDocument.
+        // The key gets added and removed during pipeline execution.
+        String actualPipelineId = (String) simulateVerboseIngestDocument.getIngestMetadata().remove("pipeline");
+        assertThat(actualPipelineId, equalTo(expectedPipelineId));
+
+        assertThat(simulateVerboseIngestDocument, not(sameInstance(expectedIngestDocument)));
+        assertIngestDocument(simulateVerboseIngestDocument, expectedIngestDocument);
+        assertThat(simulateVerboseIngestDocument.getSourceAndMetadata(), not(sameInstance(expectedIngestDocument.getSourceAndMetadata())));
+    }
+
 }

server/src/test/java/org/elasticsearch/ingest/CompoundProcessorTests.java

@@ -285,11 +285,12 @@ public void testBreakOnFailure() throws Exception {
     public void testFailureProcessorIsInvokedOnFailure() {
         TestProcessor onFailureProcessor = new TestProcessor(null, "on_failure", ingestDocument -> {
             Map<String, Object> ingestMetadata = ingestDocument.getIngestMetadata();
-            assertThat(ingestMetadata.entrySet(), hasSize(4));
+            assertThat(ingestMetadata.entrySet(), hasSize(5));
             assertThat(ingestMetadata.get(CompoundProcessor.ON_FAILURE_MESSAGE_FIELD), equalTo("failure!"));
             assertThat(ingestMetadata.get(CompoundProcessor.ON_FAILURE_PROCESSOR_TYPE_FIELD), equalTo("test-processor"));
             assertThat(ingestMetadata.get(CompoundProcessor.ON_FAILURE_PROCESSOR_TAG_FIELD), nullValue());
             assertThat(ingestMetadata.get(CompoundProcessor.ON_FAILURE_PIPELINE_FIELD), equalTo("2"));
+            assertThat(ingestMetadata.get("pipeline"), equalTo("1"));
         });
 
         Pipeline pipeline2 = new Pipeline("2", null, null, new CompoundProcessor(new TestProcessor(new RuntimeException("failure!"))));