Merge pull request #728 from simonpasquier/udpate-prometheus-2.22

jsonnet/kube-prometheus: update Prometheus dependency to v2.22.0

README.md

@@ -657,7 +657,7 @@ In case you want to monitor all namespaces in a cluster, you can add the followi
 [embedmd]:# (examples/all-namespaces.jsonnet)
 ```jsonnet
 local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') +
-  (import 'kube-prometheus/kube-prometheus-all-namespaces.libsonnet') + {
+           (import 'kube-prometheus/kube-prometheus-all-namespaces.libsonnet') + {
   _config+:: {
     namespace: 'monitoring',
 
@@ -704,7 +704,7 @@ To do that, one can import the following mixin
 [embedmd]:# (examples/strip-limits.jsonnet)
 ```jsonnet
 local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') +
-  (import 'kube-prometheus/kube-prometheus-strip-limits.libsonnet') + {
+           (import 'kube-prometheus/kube-prometheus-strip-limits.libsonnet') + {
   _config+:: {
     namespace: 'monitoring',
   },

examples/all-namespaces.jsonnet

 local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') +
-  (import 'kube-prometheus/kube-prometheus-all-namespaces.libsonnet') + {
+           (import 'kube-prometheus/kube-prometheus-all-namespaces.libsonnet') + {
   _config+:: {
     namespace: 'monitoring',
 

examples/strip-limits.jsonnet

 local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') +
-  (import 'kube-prometheus/kube-prometheus-strip-limits.libsonnet') + {
+           (import 'kube-prometheus/kube-prometheus-strip-limits.libsonnet') + {
   _config+:: {
     namespace: 'monitoring',
   },

jsonnet/kube-prometheus/jsonnetfile.json

@@ -90,7 +90,7 @@
           "subdir": "documentation/prometheus-mixin"
         }
       },
-      "version": "release-2.20",
+      "version": "release-2.22",
       "name": "prometheus"
     }
   ],

jsonnetfile.lock.json

@@ -129,8 +129,8 @@
           "subdir": "documentation/prometheus-mixin"
         }
       },
-      "version": "983ebb4a513302315a8117932ab832815f85e3d2",
-      "sum": "TBq4SL7YsPInARbJqwz25JaBvvAegcnRCsuz3K9niWc=",
+      "version": "0a7fdd3b76960808c3a91d92267c3d815c1bc354",
+      "sum": "CGxvaHkP7z/gnsLB/8Imvt/AnW+9nJUnTcL+fvIAZUs=",
       "name": "prometheus"
     },
     {

manifests/prometheus-rules.yaml

@@ -1906,6 +1906,15 @@ spec:
       for: 15m
       labels:
         severity: warning
+    - alert: PrometheusTargetLimitHit
+      annotations:
+        description: Prometheus {{$labels.namespace}}/{{$labels.pod}} has dropped {{ printf "%.0f" $value }} targets because the number of targets exceeded the configured target_limit.
+        summary: Prometheus has dropped targets because some scrape configs have exceeded the targets limit.
+      expr: |
+        increase(prometheus_target_scrape_pool_exceeded_target_limit_total{job="prometheus-k8s",namespace="monitoring"}[5m]) > 0
+      for: 15m
+      labels:
+        severity: warning
   - name: alertmanager.rules
     rules:
     - alert: AlertmanagerConfigInconsistent