Added HAproxy exporter

Change-Id: I99124d11639505c76bafcfe9be622135382e3f09

charts/haproxy-exporter/Chart.yaml

@@ -0,0 +1,11 @@
+---
+apiVersion: v1
+name: haproxy-exporter
+version: 0.3.1
+description: HAProxy exporter for Prometheus
+home: https://github.com/vexxhost/helm-charts
+maintainers:
+- name: Mohammed Naser
+  email: mnaser@vexxhost.com
+  url: https://github.com/mnaser
+appVersion: v0.10.0

charts/haproxy-exporter/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "haproxy-exporter.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "haproxy-exporter.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Generate basic labels
+*/}}
+{{- define "haproxy-exporter.labels" }}
+app.kubernetes.io/name: {{ include "haproxy-exporter.fullname" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+app.kubernetes.io/component: metrics
+app.kubernetes.io/part-of: haproxy
+{{- if .Values.commonLabels }}
+{{ toYaml .Values.commonLabels }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "haproxy-exporter.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

charts/haproxy-exporter/templates/daemonset.yaml

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+---
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  namespace: {{ .Release.Namespace }}
+  name: {{ include "haproxy-exporter.fullname" . }}
+  labels:
+{{ include "haproxy-exporter.labels" $ | indent 4 }}
+spec:
+  selector:
+    matchLabels:
+{{ include "haproxy-exporter.labels" $ | indent 6 }}
+  template:
+    metadata:
+      labels:
+{{ include "haproxy-exporter.labels" $ | indent 8 }}
+    spec:
+      containers:
+      - name: haproxy-exporter
+        image: prom/haproxy-exporter:v0.10.0
+        args:
+        - --haproxy.scrape-uri=unix:/var/run/haproxy.stat
+        resources:
+          limits:
+            cpu: 500m
+            memory: 180Mi
+          requests:
+            cpu: 250m
+            memory: 180Mi
+        volumeMounts:
+        - name: haproxy-socket
+          mountPath: /var/run/haproxy.stat
+        ports:
+        - name: metrics
+          containerPort: 9101
+    {{- with $.Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with $.Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+      volumes:
+        - name: haproxy-socket
+          hostPath:
+            path: /var/run/haproxy.stat

charts/haproxy-exporter/templates/prometheusrule.yaml

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+---
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  namespace: {{ .Release.Namespace }}
+  name: {{ include "haproxy-exporter.fullname" . }}
+  labels:
+{{ include "haproxy-exporter.labels" $ | indent 4 }}
+spec:
+  groups:
+  - name: haproxy
+    rules:
+    - alert: HaproxyDown
+      expr: |
+        absent(haproxy_up == 1)
+      for: 1m
+      labels:
+        severity: critical
+
+    - alert: HaproxyBackendDown
+      for: 1m
+      expr: |
+        haproxy_backend_up != 1
+      labels:
+        severity: P2
+
+    - alert: HaproxyBackendDegraded
+      expr: |
+        avg(haproxy_server_up) by (instance, backend, server) != 1
+      for: 1m
+      labels:
+        severity: P3

charts/haproxy-exporter/templates/service.yaml

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+---
+apiVersion: v1
+kind: Service
+metadata:
+  namespace: {{ .Release.Namespace }}
+  name: {{ include "haproxy-exporter.fullname" . }}
+  labels:
+{{ include "haproxy-exporter.labels" $ | indent 4 }}
+spec:
+  clusterIP: None
+  ports:
+  - name: metrics
+    port: 9101
+    targetPort: metrics
+  selector:
+{{ include "haproxy-exporter.labels" $ | indent 4 }}

charts/haproxy-exporter/templates/servicemonitor.yaml

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+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  namespace: {{ .Release.Namespace }}
+  name: {{ include "haproxy-exporter.fullname" . }}
+  labels:
+{{ include "haproxy-exporter.labels" $ | indent 4 }}
+spec:
+  endpoints:
+  - interval: 30s
+    port: metrics
+    relabelings:
+    - action: replace
+      regex: (.*)
+      replacement: ${1}:9101
+      sourceLabels:
+      - __meta_kubernetes_pod_node_name
+      targetLabel: instance
+  jobLabel: jobLabel
+  selector:
+    matchLabels:
+{{ include "haproxy-exporter.labels" $ | indent 6 }}

charts/haproxy-exporter/values.yaml

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+---