Support unauthenticated dbs

integration-test/datasets/tweets.sh

@@ -1,7 +1,14 @@
 # Sat Apr 25 16:19:01 +0000 2015
 # Mon Jan 02 15:04:05 -0700 2006
 # "RubyDate"
+set -x
+ARGS=()
+if [ "${ALLOW_EMPTY_PASSWORD}" != "yes" ]; then
+    ARGS+=(
+        --username "${MONGODB_ROOT_USER}"
+        --password "${MONGODB_ROOT_PASSWORD}"
+    )
+fi
 mongorestore \
-    --username "${MONGODB_ROOT_USER}" \
-    --password "${MONGODB_ROOT_PASSWORD}" \
+    "${ARGS[@]}" \
     /mnt/host/grafana-mongodb-community-plugin/integration-test/datasets/download/tweets/dump/

integration-test/datasources.yaml

@@ -8,4 +8,9 @@ datasources:
   secureJsonData:
     username: root
     password: rootPassword
+- name: mongodb-no-auth
+  type: meln5674-mongodb-community
+  access: proxy
+  jsonData:
+    url: mongodb://mongodb-no-auth:27017
 

integration-test/queries/tweets/timeseries-no-auth.json

@@ -0,0 +1 @@
+{"queries":[{"refId":"A","database":"twitter","collection":"tweets","timestampField":"created_at","labelFields":["user"],"valueFields":["retweet_count"],"valueFieldTypes":["float64"],"aggregation":"[{\"$project\":{\"created_at\":1, \"retweet_count\": 1, \"user\": \"$user.url\" }}, { \"$match\" : { \"retweet_count\" : { \"$gt\": 1000 } } } ]","autoTimeBound":false,"autoTimeSort":true,"queryType":"Timeseries","timestampFormat":"Mon Jan 02 15:04:05 -0700 2006","key":"Q-dcb1733c-b2cd-4a45-bc7b-00e76984d22b-0","datasource":{"uid":"GLlI6wg4z","type":"meln5674-mongodb-community"},"datasourceId":2,"intervalMs":900000,"maxDataPoints":681}],"range":{"from":"2015-04-25T15:15:52.000Z","to":"2015-05-03T09:01:56.000Z","raw":{"from":"2015-04-25T15:15:52.000Z","to":"2015-05-03T09:01:56.000Z"}},"from":"1429974952000","to":"1430643716000"}

integration-test/queries/weather/table-no-auth.json

@@ -0,0 +1 @@
+{"queries":[{"refId":"A","database":"test","collection":"weather","timestampField":"timestamp","labelFields":["sensorID"],"valueFields":["timestamp","sensorID","temperature"],"valueFieldTypes":["time","int32","int32"],"aggregation":"[{\"$project\":{\"timestamp\":1,\"sensorID\":\"$metadata.sensorId\",\"temperature\":\"$temp\",\"_id\":0}}]","autoTimeBound":true,"autoTimeSort":true,"queryType":"Table","key":"Q-020c94fc-9c76-4def-a5fd-3c5377238e56-0","datasource":{"uid":"GLlI6wg4z","type":"meln5674-mongodb-community"},"datasourceId":2,"intervalMs":120000,"maxDataPoints":681}],"range":{"from":"2021-05-18T20:00:00.000Z","to":"2021-05-19T20:00:00.000Z","raw":{"from":"2021-05-18T20:00:00.000Z","to":"2021-05-19T20:00:00.000Z"}},"from":"1621368000000","to":"1621454400000"}

integration-test/queries/weather/timeseries-no-auth.json

@@ -0,0 +1 @@
+{"queries":[{"database":"test","collection":"weather","timestampField":"timestamp","labelFields":["sensorID"],"valueFields":["temperature","foo"],"valueFieldTypes":["int32","int64"],"aggregation":"[{ \"$project\": { \"timestamp\": 1, \"sensorID\": \"$metadata.sensorId\", \"temperature\": \"$temp\", \"foo\": { \"$literal\" : 1621296000000 } }}]","refId":"A","key":"Q-1658634116513-0.7764272519013262-0","maxDataPoints":681,"liveStreaming":false,"showingGraph":true,"showingTable":true,"datasourceId":2,"intervalMs":300000,"orgId":1}],"range":{"from":"2021-05-18T00:00:00.000Z","to":"2021-05-19T20:00:00.000Z","raw":{"from":"2021-05-18T00:00:00.000Z","to":"2021-05-19T20:00:00.000Z"}},"from":"1621296000000","to":"1621454400000"}

integration-test/run.sh

@@ -93,6 +93,10 @@ MONGODB_ARGS=(
 
 helm upgrade --install --wait mongodb bitnami/mongodb "${MONGODB_ARGS[@]}"
 
+MONGODB_ARGS+=( --set auth.enabled=false )
+
+helm upgrade --install --wait mongodb-no-auth bitnami/mongodb "${MONGODB_ARGS[@]}"
+
 GRAFANA_ARGS=(
     --set datasources.secretName=datasources
     --set admin.password=adminPassword
@@ -148,6 +152,7 @@ spec:
         args:
         - |
             curl -v -f -u admin:adminPassword http://grafana:3000/api/datasources/1/health
+            curl -v -f -u admin:adminPassword http://grafana:3000/api/datasources/2/health
             for query in weather/timeseries weather/table tweets/timeseries; do
                 curl 'http://grafana:3000/api/ds/query' \
                   -v -f \

pkg/plugin/plugin.go

@@ -220,28 +220,32 @@ func connect(ctx context.Context, pCtx backend.PluginContext) (client *mongo.Cli
 	if err != nil {
 		return nil, "", nil, err
 	}
+	opts := mongoOpts.Client()
+
 	mongoURL, err := url.Parse(data.URL)
 	if err != nil {
 		return nil, "Invalid URL: ", err, nil
 	}
 
+	opts = opts.ApplyURI(mongoURL.String())
 	username, hasUsername := pCtx.DataSourceInstanceSettings.DecryptedSecureJSONData["username"]
 	password, hasPassword := pCtx.DataSourceInstanceSettings.DecryptedSecureJSONData["password"]
 
-	if hasUsername {
-		if hasPassword {
+	if hasUsername && username != "" {
+		if hasPassword && password != "" {
 			mongoURL.User = url.UserPassword(username, password)
 		} else {
 			mongoURL.User = url.User(username)
 		}
-	}
 
-	credential := options.Credential{
-		Username: username,
-		Password: password,
+		credential := options.Credential{
+			Username: username,
+			Password: password,
+		}
+		opts = opts.SetAuth(credential)
 	}
 
-	mongoClient, err := mongo.Connect(ctx, mongoOpts.Client().ApplyURI(mongoURL.String()).SetAuth(credential))
+	mongoClient, err := mongo.Connect(ctx, opts)
 	if err != nil {
 		return nil, "Error while connecting to MongoDB: ", err, nil
 	}