stackdriver: better error handling and show query metadata

If the Stackdriver returns an error, show that error in the query
editor. Also, allow the user to see the raw querystring that was sent
to google (for troubleshooting).

pkg/tsdb/stackdriver/stackdriver.go

@@ -16,6 +16,7 @@ import (
 
 	"github.com/grafana/grafana/pkg/api/pluginproxy"
 	"github.com/grafana/grafana/pkg/components/null"
+	"github.com/grafana/grafana/pkg/components/simplejson"
 	"github.com/grafana/grafana/pkg/log"
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/plugins"
@@ -28,7 +29,8 @@ var slog log.Logger
 
 // StackdriverExecutor executes queries for the Stackdriver datasource
 type StackdriverExecutor struct {
-	HTTPClient *http.Client
+	httpClient *http.Client
+	dsInfo     *models.DataSource
 }
 
 // NewStackdriverExecutor initializes a http client
@@ -39,7 +41,8 @@ func NewStackdriverExecutor(dsInfo *models.DataSource) (tsdb.TsdbQueryEndpoint,
 	}
 
 	return &StackdriverExecutor{
-		HTTPClient: httpClient,
+		httpClient: httpClient,
+		dsInfo:     dsInfo,
 	}, nil
 }
 
@@ -62,44 +65,7 @@ func (e *StackdriverExecutor) Query(ctx context.Context, dsInfo *models.DataSour
 	}
 
 	for _, query := range queries {
-		req, err := e.createRequest(ctx, dsInfo)
-		if err != nil {
-			return nil, err
-		}
-
-		req.URL.RawQuery = query.Params.Encode()
-		slog.Info("tsdbQuery", "req.URL.RawQuery", req.URL.RawQuery)
-
-		httpClient, err := dsInfo.GetHttpClient()
-		if err != nil {
-			return nil, err
-		}
-
-		span, ctx := opentracing.StartSpanFromContext(ctx, "stackdriver query")
-		span.SetTag("target", query.Target)
-		span.SetTag("from", tsdbQuery.TimeRange.From)
-		span.SetTag("until", tsdbQuery.TimeRange.To)
-		span.SetTag("datasource_id", dsInfo.Id)
-		span.SetTag("org_id", dsInfo.OrgId)
-
-		defer span.Finish()
-
-		opentracing.GlobalTracer().Inject(
-			span.Context(),
-			opentracing.HTTPHeaders,
-			opentracing.HTTPHeadersCarrier(req.Header))
-
-		res, err := ctxhttp.Do(ctx, httpClient, req)
-		if err != nil {
-			return nil, err
-		}
-
-		data, err := e.unmarshalResponse(res)
-		if err != nil {
-			return nil, err
-		}
-
-		queryRes, err := e.parseResponse(data, query.RefID)
+		queryRes, err := e.executeQuery(ctx, query, tsdbQuery)
 		if err != nil {
 			return nil, err
 		}
@@ -153,6 +119,53 @@ func (e *StackdriverExecutor) parseQueries(tsdbQuery *tsdb.TsdbQuery) ([]*Stackd
 	return stackdriverQueries, nil
 }
 
+func (e *StackdriverExecutor) executeQuery(ctx context.Context, query *StackdriverQuery, tsdbQuery *tsdb.TsdbQuery) (*tsdb.QueryResult, error) {
+	queryResult := &tsdb.QueryResult{Meta: simplejson.New(), RefId: query.RefID}
+
+	req, err := e.createRequest(ctx, e.dsInfo)
+	if err != nil {
+		queryResult.Error = err
+		return queryResult, nil
+	}
+
+	req.URL.RawQuery = query.Params.Encode()
+	queryResult.Meta.Set("rawQuery", req.URL.RawQuery)
+
+	span, ctx := opentracing.StartSpanFromContext(ctx, "stackdriver query")
+	span.SetTag("target", query.Target)
+	span.SetTag("from", tsdbQuery.TimeRange.From)
+	span.SetTag("until", tsdbQuery.TimeRange.To)
+	span.SetTag("datasource_id", e.dsInfo.Id)
+	span.SetTag("org_id", e.dsInfo.OrgId)
+
+	defer span.Finish()
+
+	opentracing.GlobalTracer().Inject(
+		span.Context(),
+		opentracing.HTTPHeaders,
+		opentracing.HTTPHeadersCarrier(req.Header))
+
+	res, err := ctxhttp.Do(ctx, e.httpClient, req)
+	if err != nil {
+		queryResult.Error = err
+		return queryResult, nil
+	}
+
+	data, err := e.unmarshalResponse(res)
+	if err != nil {
+		queryResult.Error = err
+		return queryResult, nil
+	}
+
+	err = e.parseResponse(queryResult, data)
+	if err != nil {
+		queryResult.Error = err
+		return queryResult, nil
+	}
+
+	return queryResult, nil
+}
+
 func (e *StackdriverExecutor) unmarshalResponse(res *http.Response) (StackDriverResponse, error) {
 	body, err := ioutil.ReadAll(res.Body)
 	defer res.Body.Close()
@@ -161,24 +174,21 @@ func (e *StackdriverExecutor) unmarshalResponse(res *http.Response) (StackDriver
 	}
 
 	if res.StatusCode/100 != 2 {
-		slog.Info("Request failed", "status", res.Status, "body", string(body))
-		return StackDriverResponse{}, fmt.Errorf("Request failed status: %v", res.Status)
+		slog.Error("Request failed", "status", res.Status, "body", string(body))
+		return StackDriverResponse{}, fmt.Errorf(string(body))
 	}
 
 	var data StackDriverResponse
 	err = json.Unmarshal(body, &data)
 	if err != nil {
-		slog.Info("Failed to unmarshal Stackdriver response", "error", err, "status", res.Status, "body", string(body))
+		slog.Error("Failed to unmarshal Stackdriver response", "error", err, "status", res.Status, "body", string(body))
 		return StackDriverResponse{}, err
 	}
 
 	return data, nil
 }
 
-func (e *StackdriverExecutor) parseResponse(data StackDriverResponse, queryRefID string) (*tsdb.QueryResult, error) {
-	queryRes := tsdb.NewQueryResult()
-	queryRes.RefId = queryRefID
-
+func (e *StackdriverExecutor) parseResponse(queryRes *tsdb.QueryResult, data StackDriverResponse) error {
 	for _, series := range data.TimeSeries {
 		points := make([]tsdb.TimePoint, 0)
 		for _, point := range series.Points {
@@ -195,7 +205,7 @@ func (e *StackdriverExecutor) parseResponse(data StackDriverResponse, queryRefID
 		})
 	}
 
-	return queryRes, nil
+	return nil
 }
 
 func (e *StackdriverExecutor) createRequest(ctx context.Context, dsInfo *models.DataSource) (*http.Request, error) {
@@ -227,7 +237,7 @@ func (e *StackdriverExecutor) createRequest(ctx context.Context, dsInfo *models.
 
 	pluginproxy.ApplyRoute(ctx, req, proxyPass, stackdriverRoute, dsInfo)
 
-	return req, err
+	return req, nil
 }
 
 func fixIntervalFormat(target string) string {

pkg/tsdb/stackdriver/stackdriver_test.go

@@ -28,7 +28,7 @@ func TestStackdriver(t *testing.T) {
 					{
 						Model: simplejson.NewFromAny(map[string]interface{}{
 							"target":     "target",
-							"metricType": "time_series",
+							"metricType": "a/metric/type",
 						}),
 						RefId: "A",
 					},
@@ -44,52 +44,56 @@ func TestStackdriver(t *testing.T) {
 			So(queries[0].Params["interval.startTime"][0], ShouldEqual, "2018-03-15T13:00:00Z")
 			So(queries[0].Params["interval.endTime"][0], ShouldEqual, "2018-03-15T13:34:00Z")
 			So(queries[0].Params["aggregation.perSeriesAligner"][0], ShouldEqual, "ALIGN_NONE")
-			So(queries[0].Params["filter"][0], ShouldEqual, "time_series")
+			So(queries[0].Params["filter"][0], ShouldEqual, "a/metric/type")
 		})
 
-		Convey("Parse stackdriver response for data aggregated to one time series", func() {
-			var data StackDriverResponse
+		Convey("Parse stackdriver response in the time series format", func() {
+			Convey("when data from query aggregated to one time series", func() {
+				var data StackDriverResponse
 
-			jsonBody, err := ioutil.ReadFile("./test-data/1-series-response-agg-one-metric.json")
-			So(err, ShouldBeNil)
-			err = json.Unmarshal(jsonBody, &data)
-			So(err, ShouldBeNil)
-			So(len(data.TimeSeries), ShouldEqual, 1)
-
-			res, err := executor.parseResponse(data, "A")
-			So(err, ShouldBeNil)
-
-			So(len(res.Series), ShouldEqual, 1)
-			So(res.Series[0].Name, ShouldEqual, "serviceruntime.googleapis.com/api/request_count")
-			So(len(res.Series[0].Points), ShouldEqual, 3)
-
-			So(res.Series[0].Points[0][0].Float64, ShouldEqual, 1.0666666666667)
-			So(res.Series[0].Points[1][0].Float64, ShouldEqual, 1.05)
-			So(res.Series[0].Points[2][0].Float64, ShouldEqual, 0.05)
-		})
+				jsonBody, err := ioutil.ReadFile("./test-data/1-series-response-agg-one-metric.json")
+				So(err, ShouldBeNil)
+				err = json.Unmarshal(jsonBody, &data)
+				So(err, ShouldBeNil)
+				So(len(data.TimeSeries), ShouldEqual, 1)
 
-		Convey("Parse stackdriver response for data with no aggregation", func() {
-			var data StackDriverResponse
+				res := &tsdb.QueryResult{Meta: simplejson.New(), RefId: "A"}
+				err = executor.parseResponse(res, data)
+				So(err, ShouldBeNil)
 
-			jsonBody, err := ioutil.ReadFile("./test-data/2-series-response-no-agg.json")
-			So(err, ShouldBeNil)
-			err = json.Unmarshal(jsonBody, &data)
-			So(err, ShouldBeNil)
-			So(len(data.TimeSeries), ShouldEqual, 3)
-
-			res, err := executor.parseResponse(data, "A")
-			So(err, ShouldBeNil)
+				So(len(res.Series), ShouldEqual, 1)
+				So(res.Series[0].Name, ShouldEqual, "serviceruntime.googleapis.com/api/request_count")
+				So(len(res.Series[0].Points), ShouldEqual, 3)
 
-			Convey("Should add labels to metric name", func() {
-				So(len(res.Series), ShouldEqual, 3)
-				So(res.Series[0].Name, ShouldEqual, "compute.googleapis.com/instance/cpu/usage_time collector-asia-east-1")
-				So(res.Series[1].Name, ShouldEqual, "compute.googleapis.com/instance/cpu/usage_time collector-europe-west-1")
-				So(res.Series[2].Name, ShouldEqual, "compute.googleapis.com/instance/cpu/usage_time collector-us-east-1")
+				So(res.Series[0].Points[0][0].Float64, ShouldEqual, 1.0666666666667)
+				So(res.Series[0].Points[1][0].Float64, ShouldEqual, 1.05)
+				So(res.Series[0].Points[2][0].Float64, ShouldEqual, 0.05)
+			})
 
-				So(len(res.Series[0].Points), ShouldEqual, 3)
-				So(res.Series[0].Points[0][0].Float64, ShouldEqual, 9.7730520330369)
-				So(res.Series[0].Points[1][0].Float64, ShouldEqual, 9.7323568146676)
-				So(res.Series[0].Points[2][0].Float64, ShouldEqual, 9.8566497180145)
+			Convey("when data from query with no aggregation", func() {
+				var data StackDriverResponse
+
+				jsonBody, err := ioutil.ReadFile("./test-data/2-series-response-no-agg.json")
+				So(err, ShouldBeNil)
+				err = json.Unmarshal(jsonBody, &data)
+				So(err, ShouldBeNil)
+				So(len(data.TimeSeries), ShouldEqual, 3)
+
+				res := &tsdb.QueryResult{Meta: simplejson.New(), RefId: "A"}
+				err = executor.parseResponse(res, data)
+				So(err, ShouldBeNil)
+
+				Convey("Should add labels to metric name", func() {
+					So(len(res.Series), ShouldEqual, 3)
+					So(res.Series[0].Name, ShouldEqual, "compute.googleapis.com/instance/cpu/usage_time collector-asia-east-1")
+					So(res.Series[1].Name, ShouldEqual, "compute.googleapis.com/instance/cpu/usage_time collector-europe-west-1")
+					So(res.Series[2].Name, ShouldEqual, "compute.googleapis.com/instance/cpu/usage_time collector-us-east-1")
+
+					So(len(res.Series[0].Points), ShouldEqual, 3)
+					So(res.Series[0].Points[0][0].Float64, ShouldEqual, 9.7730520330369)
+					So(res.Series[0].Points[1][0].Float64, ShouldEqual, 9.7323568146676)
+					So(res.Series[0].Points[2][0].Float64, ShouldEqual, 9.8566497180145)
+				})
 			})
 		})
 	})

public/app/plugins/datasource/stackdriver/datasource.ts

@@ -20,26 +20,27 @@ export default class StackdriverDatasource {
 
     const result = [];
 
-    try {
-      const { data } = await this.backendSrv.datasourceRequest({
-        url: '/api/tsdb/query',
-        method: 'POST',
-        data: {
-          from: options.range.from.valueOf().toString(),
-          to: options.range.to.valueOf().toString(),
-          queries,
-        },
-      });
+    const { data } = await this.backendSrv.datasourceRequest({
+      url: '/api/tsdb/query',
+      method: 'POST',
+      data: {
+        from: options.range.from.valueOf().toString(),
+        to: options.range.to.valueOf().toString(),
+        queries,
+      },
+    });
 
-      if (data.results) {
-        Object['values'](data.results).forEach(queryRes => {
-          queryRes.series.forEach(series => {
-            result.push({ target: series.name, datapoints: series.points });
+    if (data.results) {
+      Object['values'](data.results).forEach(queryRes => {
+        queryRes.series.forEach(series => {
+          result.push({
+            target: series.name,
+            datapoints: series.points,
+            refId: queryRes.refId,
+            meta: queryRes.meta,
           });
         });
-      }
-    } catch (error) {
-      console.log(error);
+      });
     }
 
     return { data: result };

public/app/plugins/datasource/stackdriver/partials/query.editor.html

@@ -2,15 +2,49 @@
   <div class="gf-form-inline">
     <div class="gf-form">
       <span class="gf-form-label width-9">Project</span>
-      <input class="gf-form-input" disabled type="text" ng-model='ctrl.target.project.name' get-options="ctrl.getProjects()" css-class="min-width-12"
-      />
+      <input class="gf-form-input" disabled type="text" ng-model='ctrl.target.project.name' get-options="ctrl.getProjects()"
+        css-class="min-width-12" />
     </div>
   </div>
   <div class="gf-form-inline">
     <div class="gf-form">
       <span class="gf-form-label width-9">Metric Type</span>
-      <gf-form-dropdown model="ctrl.target.metricType" get-options="ctrl.getMetricTypes($query)" class="gf-form-input" disabled
-        type="text" allow-custom="true" lookup-text="true" css-class="min-width-12" on-change="ctrl.refresh()"></gf-form-dropdown>
+      <gf-form-dropdown model="ctrl.target.metricType" get-options="ctrl.getMetricTypes($query)" class="min-width-20"
+        disabled type="text" allow-custom="true" lookup-text="true" css-class="min-width-12" on-change="ctrl.refresh()"></gf-form-dropdown>
     </div>
+    <div class="gf-form gf-form--grow">
+      <div class="gf-form-label gf-form-label--grow"></div>
+    </div>
+  </div>
+  <div class="gf-form-inline">
+    <div class="gf-form">
+      <label class="gf-form-label query-keyword" ng-click="ctrl.showHelp = !ctrl.showHelp">
+        Show Help
+        <i class="fa fa-caret-down" ng-show="ctrl.showHelp"></i>
+        <i class="fa fa-caret-right" ng-hide="ctrl.showHelp"></i>
+      </label>
+    </div>
+    <div class="gf-form" ng-show="ctrl.lastQueryMeta">
+      <label class="gf-form-label query-keyword" ng-click="ctrl.showLastQuery = !ctrl.showLastQuery">
+        Raw Query
+        <i class="fa fa-caret-down" ng-show="ctrl.showLastQuery"></i>
+        <i class="fa fa-caret-right" ng-hide="ctrl.showLastQuery"></i>
+      </label>
+    </div>
+    <div class="gf-form gf-form--grow">
+      <div class="gf-form-label gf-form-label--grow"></div>
+    </div>
+  </div>
+
+  <div class="gf-form" ng-show="ctrl.showLastQuery">
+    <pre class="gf-form-pre">{{ctrl.lastQueryMeta.rawQueryString}}</pre>
+  </div>
+  <div class="gf-form" ng-show="ctrl.showHelp">
+    <pre class="gf-form-pre alert alert-info">
+Help text for aliasing
+    </pre>
   </div>
-</query-editor-row>
\ No newline at end of file
+  <div class="gf-form" ng-show="ctrl.lastQueryError">
+		<pre class="gf-form-pre alert alert-error">{{ctrl.lastQueryError}}</pre>
+	</div>
+</query-editor-row>

public/app/plugins/datasource/stackdriver/plugin.json

@@ -3,15 +3,23 @@
   "type": "datasource",
   "id": "stackdriver",
   "metrics": true,
-  "alerting": false,
+  "alerting": true,
   "annotations": false,
   "queryOptions": {
     "maxDataPoints": true,
     "cacheTimeout": true
   },
   "info": {
-    "description": "Data Source for Stackdriver",
-    "version": "1.0.0"
+    "description": "Google Stackdriver Datasource for Grafana",
+    "version": "1.0.0",
+    "logos": {
+      "small": "img/stackdriver_logo.png",
+      "large": "img/stackdriver_logo.png"
+    },
+    "author": {
+      "name": "Grafana Project",
+      "url": "https://grafana.com"
+    }
   },
   "routes": [
     {

public/app/plugins/datasource/stackdriver/query_ctrl.ts

@@ -2,6 +2,10 @@ import _ from 'lodash';
 import { QueryCtrl } from 'app/plugins/sdk';
 import appEvents from 'app/core/app_events';
 
+export interface QueryMeta {
+  rawQuery: string;
+  rawQueryString: string;
+}
 export class StackdriverQueryCtrl extends QueryCtrl {
   static templateUrl = 'partials/query.editor.html';
   target: {
@@ -10,21 +14,31 @@ export class StackdriverQueryCtrl extends QueryCtrl {
       name: string;
     };
     metricType: string;
+    refId: string;
   };
-  defaultDropdownValue = 'select';
+  defaultDropdownValue = 'Select metric';
 
   defaults = {
     project: {
       id: 'default',
       name: 'loading project...',
     },
-    metricType: this.defaultDropdownValue,
+    // metricType: this.defaultDropdownValue,
   };
 
+  showHelp: boolean;
+  showLastQuery: boolean;
+  lastQueryMeta: QueryMeta;
+  lastQueryError?: string;
+
   /** @ngInject */
   constructor($scope, $injector) {
     super($scope, $injector);
     _.defaultsDeep(this.target, this.defaults);
+
+    this.panelCtrl.events.on('data-received', this.onDataReceived.bind(this), $scope);
+    this.panelCtrl.events.on('data-error', this.onDataError.bind(this), $scope);
+
     this.getCurrentProject().then(this.getMetricTypes.bind(this));
   }
 
@@ -67,4 +81,34 @@ export class StackdriverQueryCtrl extends QueryCtrl {
       return [];
     }
   }
+
+  onDataReceived(dataList) {
+    this.lastQueryError = null;
+    this.lastQueryMeta = null;
+
+    const anySeriesFromQuery: any = _.find(dataList, { refId: this.target.refId });
+    if (anySeriesFromQuery) {
+      this.lastQueryMeta = anySeriesFromQuery.meta;
+      this.lastQueryMeta.rawQueryString = decodeURIComponent(this.lastQueryMeta.rawQuery);
+    }
+  }
+
+  onDataError(err) {
+    if (err.data && err.data.results) {
+      const queryRes = err.data.results[this.target.refId];
+      if (queryRes) {
+        this.lastQueryMeta = queryRes.meta;
+        this.lastQueryMeta.rawQueryString = decodeURIComponent(this.lastQueryMeta.rawQuery);
+
+        let jsonBody;
+        try {
+          jsonBody = JSON.parse(queryRes.error);
+        } catch {
+          this.lastQueryError = queryRes.error;
+        }
+
+        this.lastQueryError = jsonBody.error.message;
+      }
+    }
+  }
 }