Do not assume default datasource in Grafana panels

Author: Rulox

grafana/dashboard.json

@@ -57,6 +57,7 @@
     "links": [],
     "panels": [
         {
+            "datasource": "${DS_PROMETHEUS}",
             "collapsed": false,
             "gridPos": {
                 "h": 1,
@@ -70,6 +71,7 @@
             "type": "row"
         },
         {
+            "datasource": "${DS_PROMETHEUS}",
             "cacheTimeout": null,
             "colorBackground": true,
             "colorPostfix": false,
@@ -164,6 +166,7 @@
             "valueName": "current"
         },
         {
+            "datasource": "${DS_PROMETHEUS}",
             "collapsed": false,
             "gridPos": {
                 "h": 1,
@@ -177,6 +180,7 @@
             "type": "row"
         },
         {
+            "datasource": "${DS_PROMETHEUS}",
             "aliasColors": {},
             "bars": false,
             "dashLength": 10,
@@ -277,6 +281,7 @@
             }
         },
         {
+            "datasource": "${DS_PROMETHEUS}",
             "aliasColors": {},
             "bars": false,
             "dashLength": 10,
@@ -387,6 +392,7 @@
             }
         },
         {
+            "datasource": "${DS_PROMETHEUS}",
             "aliasColors": {},
             "bars": false,
             "dashLength": 10,
@@ -539,4 +545,4 @@
     "title": "NGINX",
     "uid": "MsjffzSZz",
     "version": 1
-}
+}