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

assets/prometheus/rules/kubelet.rules.yaml

@@ -0,0 +1,49 @@
+groups:
+- name: ./kubelet.rules
+  rules:
+  - alert: K8SNodeNotReady
+    expr: kube_node_status_condition{condition="Ready",status="true"} == 0
+    for: 1h
+    labels:
+      severity: warning
+    annotations:
+      description: The Kubelet on {{ $labels.node }} has not checked in with the API,
+        or has set itself to NotReady, for more than an hour
+      summary: Node status is NotReady
+  - alert: K8SManyNodesNotReady
+    expr: count(kube_node_status_condition{condition="Ready",status="true"} == 0)
+      > 1 and (count(kube_node_status_condition{condition="Ready",status="true"} ==
+      0) / count(kube_node_status_condition{condition="Ready",status="true"})) > 0.2
+    for: 1m
+    labels:
+      severity: critical
+    annotations:
+      description: '{{ $value }} Kubernetes nodes (more than 10% are in the NotReady
+        state).'
+      summary: Many Kubernetes nodes are Not Ready
+  - alert: K8SKubeletDown
+    expr: count(up{job="kubelet"} == 0) / count(up{job="kubelet"}) > 0.03
+    for: 1h
+    labels:
+      severity: warning
+    annotations:
+      description: Prometheus failed to scrape {{ $value }}% of kubelets.
+      summary: Many Kubelets cannot be scraped
+  - alert: K8SKubeletDown
+    expr: absent(up{job="kubelet"} == 1) or count(up{job="kubelet"} == 0) / count(up{job="kubelet"})
+      > 0.1
+    for: 1h
+    labels:
+      severity: critical
+    annotations:
+      description: Prometheus failed to scrape {{ $value }}% of kubelets, or all Kubelets
+        have disappeared from service discovery.
+      summary: Many Kubelets cannot be scraped
+  - alert: K8SKubeletTooManyPods
+    expr: kubelet_running_pod_count > 100
+    labels:
+      severity: warning
+    annotations:
+      description: Kubelet {{$labels.instance}} is running {{$value}} pods, close
+        to the limit of 110
+      summary: Kubelet is close to pod limit