chore(prometheus): scrape mysql metrics with params

Author: EamonZhang

addons/prometheus/2/chart/prometheus/templates/_scrape_config.tpl

@@ -132,6 +132,10 @@ relabel_configs:
   - source_labels: [__meta_kubernetes_pod_node_name]
     action: replace
     target_label: node
+  - source_labels: [__meta_kubernetes_service_label_app_kubernetes_io_name]
+      separator: ; 
+      regex: mysql
+      action: drop
 {{- end -}}
 
 {{- define "addons.kubernetes-service-endpoints-slow" -}}
@@ -175,6 +179,10 @@ relabel_configs:
   - source_labels: [__meta_kubernetes_pod_node_name]
     action: replace
     target_label: node
+  - source_labels: [__meta_kubernetes_service_label_app_kubernetes_io_name]
+      separator: ; 
+      regex: mysql
+      action: drop
 {{- end -}}
 
 {{- define "addons.kubernetes-pods" -}}
@@ -228,6 +236,10 @@ relabel_configs:
   - source_labels: [__meta_kubernetes_pod_node_name]
     action: replace
     target_label: node
+  - source_labels: [__meta_kubernetes_service_label_app_kubernetes_io_name]
+    separator: ; 
+    regex: mysql
+    action: drop
 {{- end -}}
 
 {{- define "addons.kubernetes-pods-slow" -}}
@@ -280,4 +292,65 @@ relabel_configs:
   - source_labels: [__meta_kubernetes_pod_node_name]
     action: replace
     target_label: node
+  - source_labels: [__meta_kubernetes_service_label_app_kubernetes_io_name]
+    separator: ; 
+    regex: mysql
+    action: drop
+{{- end -}}
+
+{{- define "addons.mysql-metrics" -}}
+honor_labels: true
+kubernetes_sd_configs:
+  - role: endpoints
+    namespaces:
+      own_namespace: true
+      names: 
+      - {{ include "common.names.namespace" .context }}
+params:
+  collect[]:
+  - informationSchema.processlist
+  - performanceSchema.replication_group_members
+  - performanceSchema.replication_group_member_stats
+  - performanceSchema.replication_applier_status_by_worker
+
+relabel_configs:
+  - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape]
+    action: keep
+    regex: true
+  - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape_slow]
+    action: drop
+    regex: true
+  - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme]
+    action: replace
+    target_label: __scheme__
+    regex: (https?)
+  - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path]
+    action: replace
+    target_label: __metrics_path__
+    regex: (.+)
+  - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
+    action: replace
+    target_label: __address__
+    regex: (.+?)(?::\d+)?;(\d+)
+    replacement: $1:$2
+  - action: labelmap
+    regex: __meta_kubernetes_service_annotation_prometheus_io_param_(.+)
+    replacement: __param_$1
+  - action: labelmap
+    regex: __meta_kubernetes_service_label_(.+)
+  - action: labelmap
+    regex: __meta_kubernetes_pod_label_(.+)
+  - source_labels: [__meta_kubernetes_namespace]
+    action: replace
+    target_label: namespace
+  - source_labels: [__meta_kubernetes_service_name]
+    action: replace
+    target_label: service
+  - source_labels: [__meta_kubernetes_pod_node_name]
+    action: replace
+    target_label: node
+  - source_labels: [__meta_kubernetes_service_label_app_kubernetes_io_name]
+    separator: ; 
+    regex: mysql
+    action: keep
 {{- end -}}

addons/prometheus/2/chart/prometheus/values.yaml

@@ -649,6 +649,8 @@ server:
         {{- include "addons.kubernetes-pods"  (dict "context" $) | nindent 4 }}
       - job_name: kubernetes-pods-slow
         {{- include "addons.kubernetes-pods-slow"  (dict "context" $) | nindent 4 }}
+      - job_name: mysql-metrics
+        {{- include "addons.mysql-metrics"  (dict "context" $) | nindent 4 }}
     {{- end }}  
     
     {{ $scheme := .Values.drycc.scheme }}