feat(monitoring-proxy): added monitoring-proxy helm chart

charts/monitoring-proxy/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/monitoring-proxy/Chart.yaml

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+apiVersion: v2
+name: monitoring-proxy
+description: Expose control-plane and kube-proxy metrics for monitoring, with auth when required
+type: application
+version: 0.1.0

charts/monitoring-proxy/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "monitoring-proxy.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 "monitoring-proxy.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 }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "monitoring-proxy.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "monitoring-proxy.labels" -}}
+helm.sh/chart: {{ include "monitoring-proxy.chart" . }}
+{{ include "monitoring-proxy.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "monitoring-proxy.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "monitoring-proxy.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "monitoring-proxy.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "monitoring-proxy.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

charts/monitoring-proxy/templates/configmap.yaml

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+{{- if .Values.controlPlane.enabled }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "monitoring-proxy.fullname" . }}-haproxy
+data:
+  haproxy.cfg: |
+    defaults
+      mode tcp
+
+    frontend kube-controller-manager
+      bind ${POD_IP}:{{ .Values.kubeControllerManager.port }}
+      default_backend kube-controller-manager
+    backend kube-controller-manager
+      server kube-controller-manager 127.0.0.1:{{ .Values.kubeControllerManager.port }}
+
+    frontend kube-scheduler
+      bind ${POD_IP}:{{ .Values.kubeScheduler.port }}
+      default_backend kube-scheduler
+    backend kube-scheduler
+      server kube-scheduler 127.0.0.1:{{ .Values.kubeScheduler.port }}
+{{- end }}

charts/monitoring-proxy/templates/cp-daemonset.yaml

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+{{- if .Values.controlPlane.enabled }}
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: {{ include "monitoring-proxy.fullname" . }}
+  labels:
+    {{- include "monitoring-proxy.labels" . | nindent 4 }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "monitoring-proxy.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "monitoring-proxy.labels" . | nindent 8 }}
+        {{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+    spec:
+      serviceAccountName: {{ include "monitoring-proxy.serviceAccountName" . }}
+      hostNetwork: true
+      volumes:
+        - name: config-haproxy
+          configMap:
+            name: {{ include "monitoring-proxy.fullname" . }}-haproxy
+      nodeSelector:
+        {{- toYaml .Values.controlPlane.nodeSelector | nindent 8 }}
+      tolerations:
+        {{- toYaml .Values.controlPlane.tolerations | nindent 8 }}
+      containers:
+        - name: haproxy
+          image: {{ .Values.haproxy.image.repository }}:{{ .Values.haproxy.image.tag }}
+          volumeMounts:
+            - name: config-haproxy
+              mountPath: /usr/local/etc/haproxy
+              readOnly: true
+          env:
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  apiVersion: v1
+                  fieldPath: status.podIP
+          resources:
+            {{- toYaml .Values.haproxy.resources | nindent 12 }}
+          ports:
+            - containerPort: {{ .Values.kubeControllerManager.port }}
+              name: kube-c-m
+            - containerPort: {{ .Values.kubeScheduler.port }}
+              name: kube-scheduler
+          securityContext:
+            allowPrivilegeEscalation: false
+        - name: kube-rbac-proxy
+          image: {{ .Values.kubeRbacProxy.image.repository }}:{{ .Values.kubeRbacProxy.image.tag }}
+          args:
+            {{- if .Values.etcd.https }}
+            - "--secure-listen-address=$(POD_IP):{{ .Values.etcd.port }}"
+            {{- else }}
+            - "--insecure-listen-address=$(POD_IP):{{ .Values.etcd.port }}"
+            {{- end }}
+            - "--upstream={{ .Values.etcd.upstreamScheme }}://127.0.0.1:{{ .Values.etcd.port }}/"
+            - "--auth-header-fields-enabled"
+            - "--allow-paths=/metrics"
+          env:
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  apiVersion: v1
+                  fieldPath: status.podIP
+          resources:
+            {{- toYaml .Values.kubeRbacProxy.resources | nindent 12 }}
+          ports:
+            - containerPort: {{ .Values.etcd.port }}
+              name: etcd
+          securityContext:
+            allowPrivilegeEscalation: false
+{{- end }}

charts/monitoring-proxy/templates/daemonset.yaml

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+{{- if .Values.kubeProxy.enabled }}
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: {{ include "monitoring-proxy.fullname" . }}-kube-proxy
+  labels:
+    {{- include "monitoring-proxy.labels" . | nindent 4 }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "monitoring-proxy.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "monitoring-proxy.labels" . | nindent 8 }}
+        {{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+    spec:
+      serviceAccountName: {{ include "monitoring-proxy.serviceAccountName" . }}
+      hostNetwork: true
+      tolerations:
+        {{- toYaml .Values.kubeProxy.tolerations | nindent 8 }}
+      containers:
+        - name: kube-rbac-proxy
+          image: {{ .Values.kubeRbacProxy.image.repository }}:{{ .Values.kubeRbacProxy.image.tag }}
+          args:
+            {{- if .Values.kubeProxy.https }}
+            - "--secure-listen-address=$(POD_IP):{{ .Values.kubeProxy.port }}"
+            {{- else }}
+            - "--insecure-listen-address=$(POD_IP):{{ .Values.kubeProxy.port }}"
+            {{- end }}
+            - "--upstream={{ .Values.kubeProxy.upstreamScheme }}://127.0.0.1:{{ .Values.kubeProxy.port }}/"
+            - "--auth-header-fields-enabled"
+            - "--allow-paths=/metrics"
+          env:
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  apiVersion: v1
+                  fieldPath: status.podIP
+          resources:
+            {{- toYaml .Values.kubeRbacProxy.resources | nindent 12 }}
+          ports:
+            - containerPort: {{ .Values.kubeProxy.port }}
+              name: kube-proxy
+          securityContext:
+            allowPrivilegeEscalation: false
+{{- end }}

charts/monitoring-proxy/templates/rbac.yaml

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+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "monitoring-proxy.fullname" . }}
+rules:
+- apiGroups: ["authentication.k8s.io"]
+  resources:
+  - tokenreviews
+  verbs: ["create"]
+- apiGroups: ["authorization.k8s.io"]
+  resources:
+  - subjectaccessreviews
+  verbs: ["create"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "monitoring-proxy.fullname" . }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ include "monitoring-proxy.fullname" . }}
+subjects:
+- kind: ServiceAccount
+  name: {{ include "monitoring-proxy.serviceAccountName" . }}
+  namespace: {{ .Release.Namespace }}

charts/monitoring-proxy/templates/serviceaccount.yaml

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+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "monitoring-proxy.serviceAccountName" . }}
+  labels:
+    {{- include "monitoring-proxy.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+automountServiceAccountToken: {{ .Values.serviceAccount.automount }}
+{{- end }}

charts/monitoring-proxy/values.yaml

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+nameOverride: ""
+fullnameOverride: ""
+
+serviceAccount:
+  create: true
+  automount: true
+  annotations: {}
+  name: ""
+
+podAnnotations: {}
+podLabels: {}
+
+haproxy:
+  image:
+    repository: haproxy
+    tag: "2.9.6"
+  resources:
+    requests:
+      cpu: 1m
+      memory: 100Mi
+    limits:
+      cpu: 200m
+      memory: 256Mi
+
+kubeRbacProxy:
+  image:
+    repository: quay.io/brancz/kube-rbac-proxy
+    tag: "v0.16.0"
+  resources:
+    requests:
+      cpu: 1m
+      memory: 10Mi
+    limits:
+      cpu: 200m
+      memory: 256Mi
+
+controlPlane:
+  enabled: true
+  nodeSelector:
+    node-role.kubernetes.io/control-plane: ""
+  tolerations:
+    - key: node-role.kubernetes.io/control-plane
+      operator: Exists
+      effect: NoSchedule
+    - key: node-role.kubernetes.io/master
+      operator: Exists
+      effect: NoSchedule
+
+etcd:
+  port: 2381
+  https: false
+  upstreamScheme: http
+kubeControllerManager:
+  port: 10257
+kubeScheduler:
+  port: 10259
+
+kubeProxy:
+  enabled: true
+  port: 10249
+  https: false
+  upstreamScheme: http
+  tolerations:
+    - effect: NoSchedule
+      operator: Exists
+    - key: CriticalAddonsOnly
+      operator: Exists
+    - effect: NoExecute
+      operator: Exists