feature: support metrics for multi value fields (#88818)

x-pack/plugin/rollup/qa/rest/src/yamlRestTest/resources/rest-api-spec/test/rollup/10_basic.yml

@@ -44,6 +44,12 @@ setup:
                         type: keyword
                       values:
                         type: integer
+                      multi-counter:
+                        type: long
+                        time_series_metric: counter
+                      multi-gauge:
+                        type: integer
+                        time_series_metric: gauge
                       network:
                         properties:
                           tx:
@@ -58,21 +64,21 @@ setup:
         index: test
         body:
           - '{"index": {}}'
-          - '{"@timestamp": "2021-04-28T18:50:04.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.1", "network": {"tx": 2001818691, "rx": 802133794}, "created_at": "2021-04-28T19:34:00.000Z", "running": false, "number_of_containers": 2, "tags": ["backend", "prod"], "values": [2, 3, 6]}}}'
+          - '{"@timestamp": "2021-04-28T18:50:04.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.1", "multi-counter" : [10, 11, 12], "multi-gauge": [100, 200, 150], "network": {"tx": 2001818691, "rx": 802133794}, "created_at": "2021-04-28T19:34:00.000Z", "running": false, "number_of_containers": 2, "tags": ["backend", "prod"], "values": [2, 3, 6]}}}'
           - '{"index": {}}'
-          - '{"@timestamp": "2021-04-28T18:50:24.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.26", "network": {"tx": 2005177954, "rx": 801479970}, "created_at": "2021-04-28T19:35:00.000Z", "running": true, "number_of_containers": 2, "tags": ["backend", "prod", "us-west1"], "values": [1, 1, 3]}}}'
+          - '{"@timestamp": "2021-04-28T18:50:24.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.26", "multi-counter" : [21, 22, 23], "multi-gauge": [90, 91, 95], "network": {"tx": 2005177954, "rx": 801479970}, "created_at": "2021-04-28T19:35:00.000Z", "running": true, "number_of_containers": 2, "tags": ["backend", "prod", "us-west1"], "values": [1, 1, 3]}}}'
           - '{"index": {}}'
-          - '{"@timestamp": "2021-04-28T20:50:44.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.41", "network": {"tx": 2006223737, "rx": 802337279}, "created_at": "2021-04-28T19:36:00.000Z", "running": true, "number_of_containers": 2, "tags": ["backend", "prod", "us-west2"], "values": [4, 1, 2]}}}'
+          - '{"@timestamp": "2021-04-28T20:50:44.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.41", "multi-counter" : [1, 5, 10], "multi-gauge": [103, 110, 109], "network": {"tx": 2006223737, "rx": 802337279}, "created_at": "2021-04-28T19:36:00.000Z", "running": true, "number_of_containers": 2, "tags": ["backend", "prod", "us-west2"], "values": [4, 1, 2]}}}'
           - '{"index": {}}'
-          - '{"@timestamp": "2021-04-28T20:51:04.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.22", "network": {"tx": 2012916202, "rx": 803685721}, "created_at": "2021-04-28T19:37:00.000Z", "running": true, "number_of_containers": 2, "tags": ["backend", "prod"], "values": [2, 3, 1]}}}'
+          - '{"@timestamp": "2021-04-28T20:51:04.467Z", "metricset": "pod", "k8s": {"pod": {"name": "cat", "uid":"947e4ced-1786-4e53-9e0c-5c447e959507", "ip": "10.10.55.22", "multi-counter" : [101, 102, 105], "multi-gauge": [100, 100, 100], "network": {"tx": 2012916202, "rx": 803685721}, "created_at": "2021-04-28T19:37:00.000Z", "running": true, "number_of_containers": 2, "tags": ["backend", "prod"], "values": [2, 3, 1]}}}'
           - '{"index": {}}'
-          - '{"@timestamp": "2021-04-28T18:50:03.142Z", "metricset": "pod", "k8s": {"pod": {"name": "dog", "uid":"df3145b3-0563-4d3b-a0f7-897eb2876ea9", "ip": "10.10.55.33", "network": {"tx": 1434521831, "rx": 530575198}, "created_at": "2021-04-28T19:42:00.000Z", "running": false, "number_of_containers": 1, "tags": ["backend", "test"], "values": [2, 3, 4]}}}'
+          - '{"@timestamp": "2021-04-28T18:50:03.142Z", "metricset": "pod", "k8s": {"pod": {"name": "dog", "uid":"df3145b3-0563-4d3b-a0f7-897eb2876ea9", "ip": "10.10.55.33", "multi-counter" : [7, 11, 44], "multi-gauge": [100, 100, 102], "network": {"tx": 1434521831, "rx": 530575198}, "created_at": "2021-04-28T19:42:00.000Z", "running": false, "number_of_containers": 1, "tags": ["backend", "test"], "values": [2, 3, 4]}}}'
           - '{"index": {}}'
-          - '{"@timestamp": "2021-04-28T18:50:23.142Z", "metricset": "pod", "k8s": {"pod": {"name": "dog", "uid":"df3145b3-0563-4d3b-a0f7-897eb2876ea9", "ip": "10.10.55.56", "network": {"tx": 1434577921, "rx": 530600088}, "created_at": "2021-04-28T19:43:00.000Z", "running": false, "number_of_containers": 1, "tags": ["backend", "test", "us-west2"], "values": [2, 1, 1]}}}'
+          - '{"@timestamp": "2021-04-28T18:50:23.142Z", "metricset": "pod", "k8s": {"pod": {"name": "dog", "uid":"df3145b3-0563-4d3b-a0f7-897eb2876ea9", "ip": "10.10.55.56", "multi-counter" : [0, 0, 1], "multi-gauge": [101, 102, 102], "network": {"tx": 1434577921, "rx": 530600088}, "created_at": "2021-04-28T19:43:00.000Z", "running": false, "number_of_containers": 1, "tags": ["backend", "test", "us-west2"], "values": [2, 1, 1]}}}'
           - '{"index": {}}'
-          - '{"@timestamp": "2021-04-28T19:50:53.142Z", "metricset": "pod", "k8s": {"pod": {"name": "dog", "uid":"df3145b3-0563-4d3b-a0f7-897eb2876ea9", "ip": "10.10.55.37", "network": {"tx": 1434587694, "rx": 530604797}, "created_at": "2021-04-28T19:44:00.000Z", "running": true, "number_of_containers": 1, "tags": ["backend", "test", "us-west1"], "values": [4, 5, 2]}}}'
+          - '{"@timestamp": "2021-04-28T19:50:53.142Z", "metricset": "pod", "k8s": {"pod": {"name": "dog", "uid":"df3145b3-0563-4d3b-a0f7-897eb2876ea9", "ip": "10.10.55.37", "multi-counter" : [1000, 1001, 1002], "multi-gauge": [99, 100, 110], "network": {"tx": 1434587694, "rx": 530604797}, "created_at": "2021-04-28T19:44:00.000Z", "running": true, "number_of_containers": 1, "tags": ["backend", "test", "us-west1"], "values": [4, 5, 2]}}}'
           - '{"index": {}}'
-          - '{"@timestamp": "2021-04-28T19:51:03.142Z", "metricset": "pod", "k8s": {"pod": {"name": "dog", "uid":"df3145b3-0563-4d3b-a0f7-897eb2876ea9", "ip": "10.10.55.120", "network": {"tx": 1434595272, "rx": 530605511}, "created_at": "2021-04-28T19:45:00.000Z", "running": true, "number_of_containers": 1, "tags": ["backend", "test", "us-west1"], "values": [3, 2, 1]}}}'
+          - '{"@timestamp": "2021-04-28T19:51:03.142Z", "metricset": "pod", "k8s": {"pod": {"name": "dog", "uid":"df3145b3-0563-4d3b-a0f7-897eb2876ea9", "ip": "10.10.55.120", "multi-counter" : [76, 77, 78], "multi-gauge": [95, 98, 100], "network": {"tx": 1434595272, "rx": 530605511}, "created_at": "2021-04-28T19:45:00.000Z", "running": true, "number_of_containers": 1, "tags": ["backend", "test", "us-west1"], "values": [3, 2, 1]}}}'
 
   - do:
       indices.put_settings:
@@ -106,6 +112,11 @@ setup:
   - match:  { hits.hits.0._source.k8s\.pod\.uid: 947e4ced-1786-4e53-9e0c-5c447e959507 }
   - match:  { hits.hits.0._source.metricset: pod }
   - match:  { hits.hits.0._source.@timestamp: 2021-04-28T18:00:00.000Z }
+  - match:  { hits.hits.0._source.k8s\.pod\.multi-counter: 21 }
+  - match:  { hits.hits.0._source.k8s\.pod\.multi-gauge.min: 90 }
+  - match:  { hits.hits.0._source.k8s\.pod\.multi-gauge.max: 200 }
+  - match:  { hits.hits.0._source.k8s\.pod\.multi-gauge.sum: 726 }
+  - match:  { hits.hits.0._source.k8s\.pod\.multi-gauge.value_count: 6 }
   - match:  { hits.hits.0._source.k8s\.pod\.network\.tx.min: 2001818691 }
   - match:  { hits.hits.0._source.k8s\.pod\.network\.tx.max: 2005177954 }
   - match:  { hits.hits.0._source.k8s\.pod\.network\.tx.value_count: 2 }

x-pack/plugin/rollup/src/main/java/org/elasticsearch/xpack/rollup/v2/RollupShardIndexer.java

@@ -396,15 +396,15 @@ class RollupShardIndexer {
         }
 
         public void collect(final String field, int docValueCount, final Function<Integer, Object[]> fieldValues) {
-            final Object[] value = fieldValues.apply(docValueCount);
+            final Object[] values = fieldValues.apply(docValueCount);
             if (metricFieldProducers.containsKey(field)) {
                 // TODO: missing support for array metrics
-                collectMetric(field, value[0]);
+                collectMetric(field, values);
             } else if (labelFieldProducers.containsKey(field)) {
-                if (value.length == 1) {
-                    collectLabel(field, value[0]);
+                if (values.length == 1) {
+                    collectLabel(field, values[0]);
                 } else {
-                    collectLabel(field, value);
+                    collectLabel(field, values);
                 }
             } else {
                 throw new IllegalArgumentException(
@@ -423,13 +423,15 @@ class RollupShardIndexer {
             labelFieldProducers.get(field).collect(value);
         }
 
-        private void collectMetric(final String field, final Object value) {
-            if (value instanceof Number number) {
-                metricFieldProducers.get(field).collect(number);
-            } else {
-                throw new IllegalArgumentException(
-                    "Expected numeric value for field '" + field + "' but got non numeric value: '" + value + "'"
-                );
+        private void collectMetric(final String field, final Object[] values) {
+            for (var value : values) {
+                if (value instanceof Number number) {
+                    metricFieldProducers.get(field).collect(number);
+                } else {
+                    throw new IllegalArgumentException(
+                        "Expected numeric value for field '" + field + "' but got non numeric value: '" + value + "'"
+                    );
+                }
             }
         }