Scrape Loki metrics

Change-Id: I2cd9c872882cd760fc2ff10028b7e03a31f8fba5
diff --git a/charts/prometheus/prometheus.yaml b/charts/prometheus/prometheus.yaml
index df785d3..66ae8d8 100644
--- a/charts/prometheus/prometheus.yaml
+++ b/charts/prometheus/prometheus.yaml
@@ -1149,6 +1149,10 @@
       static_configs:
         - targets:
           - localhost:9090
+    - job_name: loki
+      static_configs:
+        - targets:
+          - #@ "loki-{}.{}.svc.cluster.local:3100".format(data.values.namespace, data.values.namespace)
 
       # A scrape configuration for running Prometheus on a Kubernetes cluster.
       # This uses separate scrape configs for cluster components (i.e. API server, node)