*: bump Prometheus to v2.0.0-rc.1

assets/prometheus/rules/alertmanager.rules.yaml

@@ -0,0 +1,33 @@
+groups:
+- name: ./alertmanager.rules
+  rules:
+  - alert: AlertmanagerConfigInconsistent
+    expr: count_values("config_hash", alertmanager_config_hash) BY (service) / ON(service)
+      GROUP_LEFT() label_replace(prometheus_operator_alertmanager_spec_replicas, "service",
+      "alertmanager-$1", "alertmanager", "(.*)") != 1
+    for: 5m
+    labels:
+      severity: critical
+    annotations:
+      description: The configuration of the instances of the Alertmanager cluster
+        `{{$labels.service}}` are out of sync.
+      summary: Alertmanager configurations are inconsistent
+  - alert: AlertmanagerDownOrMissing
+    expr: label_replace(prometheus_operator_alertmanager_spec_replicas, "job", "alertmanager-$1",
+      "alertmanager", "(.*)") / ON(job) GROUP_RIGHT() sum(up) BY (job) != 1
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      description: An unexpected number of Alertmanagers are scraped or Alertmanagers
+        disappeared from discovery.
+      summary: Alertmanager down or not discovered
+  - alert: FailedReload
+    expr: alertmanager_config_last_reload_successful == 0
+    for: 10m
+    labels:
+      severity: warning
+    annotations:
+      description: Reloading Alertmanager's configuration has failed for {{ $labels.namespace
+        }}/{{ $labels.pod}}.
+      summary: Alertmanager configuration reload has failed