Fina lslides for 20231025

Author: nicholasdille

100_monitoring/prometheus/alerting.md

@@ -0,0 +1,3 @@
+## Alerting
+
+XXX Prometheus recording rules [](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/#recording-rules)

100_monitoring/prometheus/cluster_scraping.drawio.svg

@@ -6,7 +6,7 @@ Supports many datasources including Prometheus
 
 Supports datasource-specific query languages
 
-Prometheus community offers pre-created dashcoards [](https://github.com/kubernetes-monitoring/kubernetes-mixin)
+Prometheus community offers pre-created dashboards [](https://github.com/kubernetes-monitoring/kubernetes-mixin)
 
 ### Demo
 

100_monitoring/prometheus/grafana.md

@@ -76,10 +76,6 @@ sum by (instance) (rate(node_cpu_seconds_total{mode="idle"}[5m]))
 
 ## PromQL: Fun with kube-state-metrics
 
-kube-state-metrics creates additional metrics from cluster state information
-
-Queries:
-
 ```plaintext
 # Error reasons for pods
 count by (reason) (kube_pod_status_reason)
@@ -112,10 +108,36 @@ Filter out sleeping POD container:
 container_memory_usage_bytes{namespace="ingress-nginx",container!="",container!="POD"}
 ```
 
+This also removes the kumulative pod metrics
+
 ### `kube_pod_labels` is empty
 
 `kube-state-metrics` does not aggregate labels anymore [#1501](https://github.com/kubernetes/kube-state-metrics/issues/1501)
 
 Set `--metric-labels-allowlist=pods=[*]` in arguments
 
 Or `metricLabelsAllowlist` in Helm chart [](https://github.com/prometheus-community/helm-charts/blob/main/charts/kube-state-metrics/values.yaml#L184)
+
+---
+
+## PromQL: Joining metrics
+
+Metrics can be joined...
+
+...to add labels from another metric
+
+Joined metrics must have at least one common label
+
+### Example
+
+Node metrics only reference the instance and do not contain the nodename
+
+`node_uname_info` helps to get the nodename
+
+```plaintext
+node_memory_Active_bytes * on(instance) group_left(nodename) node_uname_info
+```
+
+Use label `instance` to join metrics
+
+Use all labels from left metrics (`group_left`) and add label `nodename`

100_monitoring/prometheus/prometheus.drawio.svg

@@ -563,15 +563,15 @@ plugins: []
 ## Configure grafana datasources
 ## ref: http://docs.grafana.org/administration/provisioning/#datasources
 ##
-datasources: {}
-#  datasources.yaml:
-#    apiVersion: 1
-#    datasources:
-#    - name: Prometheus
-#      type: prometheus
-#      url: http://prometheus-prometheus-server
-#      access: proxy
-#      isDefault: true
+datasources:
+  datasources.yaml:
+    apiVersion: 1
+    datasources:
+    - name: Prometheus
+      type: prometheus
+      url: http://prometheus-operated.kube-system:9090
+      access: proxy
+      isDefault: true
 #    - name: CloudWatch
 #      type: cloudwatch
 #      access: proxy

100_monitoring/prometheus/promql.md

@@ -106,6 +106,7 @@
 2023-11-23 / 2023-11-30 / 2023-11-07: Workshops [GitLab Ops](https://heise-academy.de/schulungen/einfuehrung-in-gitlab) (1 day) and [GitLab CI](https://heise-academy.de/schulungen/cicd-gitlab) (2 days)
 </span>
 </textarea></section>
+<section data-markdown="100_monitoring/prometheus/promql.md" data-separator="^---$" data-separator-vertical="^--$"></section>
 
 </div>
 </div>