fix(grafana): Use proper service for loki

The loki-read and loki-read-headless services are for internal loki
processing while the loki-gateway service is for use by external
services like Grafana. This service provides better load balancing and
caching management.

Author: ssoriche

platform/kube-prometheus/base/grafana-dashboardDatasources.yaml

@@ -37,7 +37,7 @@ stringData:
                 "name": "loki",
                 "orgId": 1,
                 "type": "loki",
-                "url": "http://loki-read.loki.svc:3100",
+                "url": "http://loki-gateway.loki.svc:80",
                 "version": 1
             }
         ]

platform/kube-prometheus/base/grafana-deployment.yaml

@@ -20,7 +20,7 @@ spec:
       annotations:
         checksum/grafana-config: d97a8b005f73b8edda242ba217f30f34
         checksum/grafana-dashboardproviders: 40d6c3ef390b61afadf89d3ec567fbb1
-        checksum/grafana-datasources: 841d7ef91de5b82cb05b2422f0f28fc0
+        checksum/grafana-datasources: bc4bdde79038a4e903b64d051ac613fd
       labels:
         app.kubernetes.io/component: grafana
         app.kubernetes.io/name: grafana

platform/kube-prometheus/settings.jsonnet

@@ -86,7 +86,7 @@ local kp =
             type: 'loki',
             access: 'proxy',
             orgId: 1,
-            url: 'http://loki-read.loki.svc:3100',
+            url: 'http://loki-gateway.loki.svc:80',
             version: 1,
             editable: false,
           },