Stackdriver: Exposing stackdriver backend api

pkg/models/datasource.go

@@ -22,6 +22,7 @@ const (
 	DS_MSSQL         = "mssql"
 	DS_ACCESS_DIRECT = "direct"
 	DS_ACCESS_PROXY  = "proxy"
+	DS_STACKDRIVER   = "stackdriver"
 )
 
 var (
@@ -59,22 +60,23 @@ type DataSource struct {
 }
 
 var knownDatasourcePlugins = map[string]bool{
-	DS_ES:                                 true,
-	DS_GRAPHITE:                           true,
-	DS_INFLUXDB:                           true,
-	DS_INFLUXDB_08:                        true,
-	DS_KAIROSDB:                           true,
-	DS_CLOUDWATCH:                         true,
-	DS_PROMETHEUS:                         true,
-	DS_OPENTSDB:                           true,
-	DS_POSTGRES:                           true,
-	DS_MYSQL:                              true,
-	DS_MSSQL:                              true,
-	"opennms":                             true,
-	"abhisant-druid-datasource":           true,
-	"dalmatinerdb-datasource":             true,
-	"gnocci":                              true,
-	"zabbix":                              true,
+	DS_ES:                       true,
+	DS_GRAPHITE:                 true,
+	DS_INFLUXDB:                 true,
+	DS_INFLUXDB_08:              true,
+	DS_KAIROSDB:                 true,
+	DS_CLOUDWATCH:               true,
+	DS_PROMETHEUS:               true,
+	DS_OPENTSDB:                 true,
+	DS_POSTGRES:                 true,
+	DS_MYSQL:                    true,
+	DS_MSSQL:                    true,
+	DS_STACKDRIVER:              true,
+	"opennms":                   true,
+	"abhisant-druid-datasource": true,
+	"dalmatinerdb-datasource":   true,
+	"gnocci":                    true,
+	"zabbix":                    true,
 	"alexanderzobnin-zabbix-datasource":   true,
 	"newrelic-app":                        true,
 	"grafana-datadog-datasource":          true,