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

assets/prometheus/rules/kube-apiserver.rules.yaml

@@ -0,0 +1,22 @@
+groups:
+- name: ./kube-apiserver.rules
+  rules:
+  - alert: K8SApiserverDown
+    expr: absent(up{job="apiserver"} == 1)
+    for: 5m
+    labels:
+      severity: critical
+    annotations:
+      description: Prometheus failed to scrape API server(s), or all API servers have
+        disappeared from service discovery.
+      summary: API server unreachable
+  - alert: K8SApiServerLatency
+    expr: histogram_quantile(0.99, sum(apiserver_request_latencies_bucket{subresource!="log",verb!~"^(?:CONNECT|WATCHLIST|WATCH|PROXY)$"})
+      WITHOUT (instance, resource)) / 1e+06 > 1
+    for: 10m
+    labels:
+      severity: warning
+    annotations:
+      description: 99th percentile Latency for {{ $labels.verb }} requests to the
+        kube-apiserver is higher than 1s.
+      summary: Kubernetes apiserver latency is high