Converter: Add support for parsing error & warning from prometheus results (#48721)

pkg/util/converter/prom.go

@@ -19,6 +19,9 @@ func logf(format string, a ...interface{}) {
 func ReadPrometheusStyleResult(iter *jsoniter.Iterator) *backend.DataResponse {
 	var rsp *backend.DataResponse
 	status := "unknown"
+	errorType := ""
+	err := ""
+	warnings := []data.Notice{}
 
 	for l1Field := iter.ReadObject(); l1Field != ""; l1Field = iter.ReadObject() {
 		switch l1Field {
@@ -28,22 +31,58 @@ func ReadPrometheusStyleResult(iter *jsoniter.Iterator) *backend.DataResponse {
 		case "data":
 			rsp = readPrometheusData(iter)
 
-		// case "error":
+		case "error":
-		// case "errorType":
+			err = iter.ReadString()
-		// case "warnings":
+
+		case "errorType":
+			errorType = iter.ReadString()
+
+		case "warnings":
+			warnings = readWarnings(iter)
+
 		default:
 			v := iter.Read()
 			logf("[ROOT] TODO, support key: %s / %v\n", l1Field, v)
 		}
 	}
 
-	if status != "success" {
+	if status == "error" {
-		logf("ERROR: %s\n", status)
+		return &backend.DataResponse{
+			Error: fmt.Errorf("%s: %s", errorType, err),
+		}
+	}
+
+	if len(warnings) > 0 {
+		for _, frame := range rsp.Frames {
+			if frame.Meta == nil {
+				frame.Meta = &data.FrameMeta{}
+			}
+			frame.Meta.Notices = warnings
+		}
 	}
 
 	return rsp
 }
 
+func readWarnings(iter *jsoniter.Iterator) []data.Notice {
+	warnings := []data.Notice{}
+	if iter.WhatIsNext() != jsoniter.ArrayValue {
+		return warnings
+	}
+
+	for iter.ReadArray() {
+		if iter.WhatIsNext() == jsoniter.StringValue {
+			notice := data.Notice{
+				Severity: data.NoticeSeverityWarning,
+				Text:     iter.ReadString(),
+			}
+			warnings = append(warnings, notice)
+		}
+	}
+
+	return warnings
+}
+
 func readPrometheusData(iter *jsoniter.Iterator) *backend.DataResponse {
 	t := iter.WhatIsNext()
 	if t == jsoniter.ArrayValue {

pkg/util/converter/prom_test.go

@@ -20,6 +20,8 @@ func TestReadPromFrames(t *testing.T) {
 		"prom-matrix-with-nans",
 		"prom-vector",
 		"prom-series",
+		"prom-warnings",
+		"prom-error",
 		"prom-exemplars",
 		"loki-streams-a",
 		"loki-streams-b",
@@ -59,6 +61,11 @@ func TestReadPromFrames(t *testing.T) {
 				require.NoError(t, err)
 			}
 
+			// skip checking golden file for error response. it's not currently supported
+			if name == "prom-error" {
+				return
+			}
+
 			fpath = path.Join("testdata", name+"-golden.txt")
 			err = experimental.CheckGoldenDataResponse(fpath, rsp, true)
 			assert.NoError(t, err)

pkg/util/converter/testdata/prom-error-frame.json

@@ -0,0 +1,3 @@
+{
+  "error": "bad_data: invalid parameter \"start\": cannot parse \"\" to a valid timestamp"
+}

pkg/util/converter/testdata/prom-error-golden.txt

@@ -0,0 +1,3 @@
+
+ERROR: bad_data: invalid parameter "start": cannot parse "" to a valid timestamp====== TEST DATA RESPONSE (arrow base64) ======
+ERROR=bad_data: invalid parameter "start": cannot parse "" to a valid timestamp

pkg/util/converter/testdata/prom-error.json

@@ -0,0 +1,5 @@
+{
+   "status": "error",
+   "errorType": "bad_data",
+   "error": "invalid parameter \"start\": cannot parse \"\" to a valid timestamp"
+}

pkg/util/converter/testdata/prom-warnings-frame.json

@@ -0,0 +1,263 @@
+{
+  "frames": [
+    {
+      "schema": {
+        "meta": {
+          "type": "timeseries-many",
+          "notices": [
+            {
+              "severity": "warning",
+              "text": "warning 1"
+            },
+            {
+              "severity": "warning",
+              "text": "warning 2"
+            }
+          ]
+        },
+        "fields": [
+          {
+            "name": "Time",
+            "type": "time",
+            "typeInfo": {
+              "frame": "time.Time"
+            }
+          },
+          {
+            "name": "up",
+            "type": "number",
+            "typeInfo": {
+              "frame": "float64"
+            },
+            "labels": {
+              "instance": "localhost:9090",
+              "job": "prometheus"
+            }
+          }
+        ]
+      },
+      "data": {
+        "values": [
+          [
+            1435781451781
+          ],
+          [
+            1
+          ]
+        ]
+      }
+    },
+    {
+      "schema": {
+        "meta": {
+          "type": "timeseries-many",
+          "notices": [
+            {
+              "severity": "warning",
+              "text": "warning 1"
+            },
+            {
+              "severity": "warning",
+              "text": "warning 2"
+            }
+          ]
+        },
+        "fields": [
+          {
+            "name": "Time",
+            "type": "time",
+            "typeInfo": {
+              "frame": "time.Time"
+            }
+          },
+          {
+            "name": "up",
+            "type": "number",
+            "typeInfo": {
+              "frame": "float64"
+            },
+            "labels": {
+              "instance": "localhost:9100",
+              "job": "node"
+            }
+          }
+        ]
+      },
+      "data": {
+        "values": [
+          [
+            1435781451781
+          ],
+          [
+            0
+          ]
+        ]
+      }
+    },
+    {
+      "schema": {
+        "meta": {
+          "type": "timeseries-many",
+          "notices": [
+            {
+              "severity": "warning",
+              "text": "warning 1"
+            },
+            {
+              "severity": "warning",
+              "text": "warning 2"
+            }
+          ]
+        },
+        "fields": [
+          {
+            "name": "Time",
+            "type": "time",
+            "typeInfo": {
+              "frame": "time.Time"
+            }
+          },
+          {
+            "name": "Value",
+            "type": "number",
+            "typeInfo": {
+              "frame": "float64"
+            },
+            "labels": {
+              "level": "error",
+              "location": "moon"
+            }
+          }
+        ]
+      },
+      "data": {
+        "values": [
+          [
+            1645029699000
+          ],
+          [
+            null
+          ]
+        ],
+        "entities": [
+          null,
+          {
+            "Inf": [
+              0
+            ]
+          }
+        ]
+      }
+    },
+    {
+      "schema": {
+        "meta": {
+          "type": "timeseries-many",
+          "notices": [
+            {
+              "severity": "warning",
+              "text": "warning 1"
+            },
+            {
+              "severity": "warning",
+              "text": "warning 2"
+            }
+          ]
+        },
+        "fields": [
+          {
+            "name": "Time",
+            "type": "time",
+            "typeInfo": {
+              "frame": "time.Time"
+            }
+          },
+          {
+            "name": "Value",
+            "type": "number",
+            "typeInfo": {
+              "frame": "float64"
+            },
+            "labels": {
+              "level": "info",
+              "location": "moon"
+            }
+          }
+        ]
+      },
+      "data": {
+        "values": [
+          [
+            1645029699000
+          ],
+          [
+            null
+          ]
+        ],
+        "entities": [
+          null,
+          {
+            "NegInf": [
+              0
+            ]
+          }
+        ]
+      }
+    },
+    {
+      "schema": {
+        "meta": {
+          "type": "timeseries-many",
+          "notices": [
+            {
+              "severity": "warning",
+              "text": "warning 1"
+            },
+            {
+              "severity": "warning",
+              "text": "warning 2"
+            }
+          ]
+        },
+        "fields": [
+          {
+            "name": "Time",
+            "type": "time",
+            "typeInfo": {
+              "frame": "time.Time"
+            }
+          },
+          {
+            "name": "Value",
+            "type": "number",
+            "typeInfo": {
+              "frame": "float64"
+            },
+            "labels": {
+              "level": "debug",
+              "location": "moon"
+            }
+          }
+        ]
+      },
+      "data": {
+        "values": [
+          [
+            1645029699000
+          ],
+          [
+            null
+          ]
+        ],
+        "entities": [
+          null,
+          {
+            "NaN": [
+              0
+            ]
+          }
+        ]
+      }
+    }
+  ]
+}

pkg/util/converter/testdata/prom-warnings-golden.txt

@@ -0,0 +1,132 @@
+🌟 This was machine generated.  Do not edit. 🌟
+
+Frame[0] {
+    "type": "timeseries-many",
+    "notices": [
+        {
+            "severity": "warning",
+            "text": "warning 1"
+        },
+        {
+            "severity": "warning",
+            "text": "warning 2"
+        }
+    ]
+}
+Name: 
+Dimensions: 2 Fields by 1 Rows
++-----------------------------------+-------------------------------------------------+
+| Name: Time                        | Name: up                                        |
+| Labels:                           | Labels: instance=localhost:9090, job=prometheus |
+| Type: []time.Time                 | Type: []float64                                 |
++-----------------------------------+-------------------------------------------------+
+| 2015-07-01 20:10:51.781 +0000 UTC | 1                                               |
++-----------------------------------+-------------------------------------------------+
+
+
+
+Frame[1] {
+    "type": "timeseries-many",
+    "notices": [
+        {
+            "severity": "warning",
+            "text": "warning 1"
+        },
+        {
+            "severity": "warning",
+            "text": "warning 2"
+        }
+    ]
+}
+Name: 
+Dimensions: 2 Fields by 1 Rows
++-----------------------------------+-------------------------------------------+
+| Name: Time                        | Name: up                                  |
+| Labels:                           | Labels: instance=localhost:9100, job=node |
+| Type: []time.Time                 | Type: []float64                           |
++-----------------------------------+-------------------------------------------+
+| 2015-07-01 20:10:51.781 +0000 UTC | 0                                         |
++-----------------------------------+-------------------------------------------+
+
+
+
+Frame[2] {
+    "type": "timeseries-many",
+    "notices": [
+        {
+            "severity": "warning",
+            "text": "warning 1"
+        },
+        {
+            "severity": "warning",
+            "text": "warning 2"
+        }
+    ]
+}
+Name: 
+Dimensions: 2 Fields by 1 Rows
++-------------------------------+------------------------------------+
+| Name: Time                    | Name: Value                        |
+| Labels:                       | Labels: level=error, location=moon |
+| Type: []time.Time             | Type: []float64                    |
++-------------------------------+------------------------------------+
+| 2022-02-16 16:41:39 +0000 UTC | +Inf                               |
++-------------------------------+------------------------------------+
+
+
+
+Frame[3] {
+    "type": "timeseries-many",
+    "notices": [
+        {
+            "severity": "warning",
+            "text": "warning 1"
+        },
+        {
+            "severity": "warning",
+            "text": "warning 2"
+        }
+    ]
+}
+Name: 
+Dimensions: 2 Fields by 1 Rows
++-------------------------------+-----------------------------------+
+| Name: Time                    | Name: Value                       |
+| Labels:                       | Labels: level=info, location=moon |
+| Type: []time.Time             | Type: []float64                   |
++-------------------------------+-----------------------------------+
+| 2022-02-16 16:41:39 +0000 UTC | -Inf                              |
++-------------------------------+-----------------------------------+
+
+
+
+Frame[4] {
+    "type": "timeseries-many",
+    "notices": [
+        {
+            "severity": "warning",
+            "text": "warning 1"
+        },
+        {
+            "severity": "warning",
+            "text": "warning 2"
+        }
+    ]
+}
+Name: 
+Dimensions: 2 Fields by 1 Rows
++-------------------------------+------------------------------------+
+| Name: Time                    | Name: Value                        |
+| Labels:                       | Labels: level=debug, location=moon |
+| Type: []time.Time             | Type: []float64                    |
++-------------------------------+------------------------------------+
+| 2022-02-16 16:41:39 +0000 UTC | NaN                                |
++-------------------------------+------------------------------------+
+
+
+====== TEST DATA RESPONSE (arrow base64) ======
+FRAME=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pkg/util/converter/testdata/prom-warnings.json

@@ -0,0 +1,37 @@
+{
+    "status" : "success",
+    "data" : {
+       "resultType" : "vector",
+       "result" : [
+          {
+             "metric" : {
+                "__name__" : "up",
+                "job" : "prometheus",
+                "instance" : "localhost:9090"
+             },
+             "value": [ 1435781451.781, "1" ]
+          },
+          {
+             "metric" : {
+                "__name__" : "up",
+                "job" : "node",
+                "instance" : "localhost:9100"
+             },
+             "value" : [ 1435781451.781, "0" ]
+          },
+          {
+            "metric": { "level": "error", "location": "moon"},
+            "value": [1645029699, "+Inf"]
+          },
+          {
+            "metric": { "level": "info", "location": "moon" },
+            "value": [1645029699, "-Inf"]
+          },
+          {
+            "metric": { "level": "debug", "location": "moon" },
+            "value": [1645029699, "NaN"]
+          }
+       ]
+    },
+    "warnings" : ["warning 1", "warning 2"]
+ }