kube-prometheus: Migrate kube-prometheus alerts to jsonnet

jsonnet/kube-prometheus/alerts/node.libsonnet

@@ -0,0 +1,39 @@
+{
+  prometheusAlerts+:: {
+    groups+: [
+      {
+        name: 'kube-prometheus-node-alerting.rules',
+        rules: [
+          {
+            alert: 'NodeDiskRunningFull',
+            annotations: {
+              description: 'device {{$labels.device}} on node {{$labels.instance}} is running full within the next 24 hours (mounted at {{$labels.mountpoint}})',
+              summary: 'Node disk is running full within 24 hours',
+            },
+            expr: |||
+              predict_linear(node_filesystem_free{%(nodeExporterSelector)s}[6h], 3600 * 24) < 0
+            ||| % $._config,
+            'for': '30m',
+            labels: {
+              severity: 'warning',
+            },
+          },
+          {
+            alert: 'NodeDiskRunningFull',
+            annotations: {
+              description: 'device {{$labels.device}} on node {{$labels.instance}} is running full within the next 2 hours (mounted at {{$labels.mountpoint}})',
+              summary: 'Node disk is running full within 2 hours',
+            },
+            expr: |||
+              predict_linear(node_filesystem_free{%(nodeExporterSelector)s}[30m], 3600 * 2) < 0
+            ||| % $._config,
+            'for': '10m',
+            labels: {
+              severity: 'critical',
+            },
+          },
+        ],
+      },
+    ],
+  },
+}