[FEAT] Prometheus Adapter reload (#2195)

* [FEAT] Prometheus Adapter reload

Signed-off-by: rita.canavarro <ritinhamcm@gmail.com>

* [FEAT] Prometheus Adapter reload

Signed-off-by: rita.canavarro <ritinhamcm@gmail.com>

---------

Signed-off-by: rita.canavarro <ritinhamcm@gmail.com>

jsonnet/kube-prometheus/components/prometheus-adapter.libsonnet

@@ -300,7 +300,12 @@ function(params) {
           },
         },
         template: {
-          metadata: { labels: pa._config.commonLabels },
+          metadata: {
+            annotations: {
+              'checksum.config/md5': std.md5(std.manifestYamlDoc(pa._config.config)),
+            },
+            labels: pa._config.commonLabels,
+          },
           spec: {
             containers: [c],
             serviceAccountName: $.serviceAccount.metadata.name,

manifests/prometheusAdapter-deployment.yaml

@@ -21,6 +21,8 @@ spec:
       maxUnavailable: 1
   template:
     metadata:
+      annotations:
+        checksum.config/md5: 3b1ebf7df0232d1675896f67b66373db
       labels:
         app.kubernetes.io/component: metrics-adapter
         app.kubernetes.io/name: prometheus-adapter