Add a helm chart

Adding a helm chart with some basic stuff, like minigun instances
deployments

.gitignore

@@ -5,6 +5,6 @@
 vendor
 
 # Ignore binary and release tarballs
-minigun
+./minigun
 *.tgz
 output/*

chart/minigun/.helmignore

@@ -0,0 +1,25 @@
+# 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/
+# Local files not needed in state
+examples

chart/minigun/Chart.yaml

@@ -0,0 +1,24 @@
+apiVersion: v2
+name: minigun
+description: A Helm chart for Minigun
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "0.6.0"

chart/minigun/examples/two-miniguns.yaml

@@ -0,0 +1,43 @@
+# Values example
+benchmarkDeployments:
+  # Defaults for all benchmark instances
+  defaults:
+    resources:
+      limits:
+        cpu: 4
+        memory: 1Gi
+
+    serviceMonitor:
+      enabled: true
+
+  # Define benchmark instances
+  instances:
+
+    test-google:    # unique name of the benchmark, will be used for k8s resource names
+      enabled: true # toggle to enable override via deeper merge
+      spec:         # the rest the of spec, same as in the `default` section above
+        replicas: 3
+        args:
+          fire-duration: 0 # infinite
+          fire-rate: 10    # per instance
+          send-method: GET
+          send-mode: http
+          send-timeout: 3s
+          workers: 16
+          disable-keep-alive: true
+          fire-target: https://www.google.com/
+
+    test-local-ip:  # unique name of the benchmark, will be used for k8s resource names
+      enabled: true # toggle to enable override via deeper merge
+      spec:         # the rest the of spec, same as in the `default` section above
+        args:
+          fire-duration: 0 # infinite
+          fire-rate: 10    # per instance
+          send-method: GET
+          send-mode: http
+          send-timeout: 1s
+          workers: 8
+          disable-keep-alive: true
+          fire-target: http://10.10.10.10/
+          http-header: "Host: my-site.cluster.local"
+

chart/minigun/templates/NOTES.txt

@@ -0,0 +1 @@
+Congratulations! You've deployed Minigun as {{ .Release.Name }} in {{ .Release.Namespace }} namespace.

chart/minigun/templates/_helpers.tpl

@@ -0,0 +1,49 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "minigun.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 "minigun.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 "minigun.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "minigun.labels" -}}
+helm.sh/chart: {{ include "minigun.chart" . }}
+{{ include "minigun.selectorLabels" . }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "minigun.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "minigun.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+

chart/minigun/templates/deployment.yaml

@@ -0,0 +1,89 @@
+{{- $defaults := .Values.benchmarkDeployments.defaults }}
+{{- $app :=  include "minigun.fullname" . }}
+{{- $labels := include "minigun.labels" . }}
+{{- $selectorLabels := include "minigun.selectorLabels" . }}
+{{- $saName := .Values.benchmarkDeployments.serviceAccount.name }}
+{{- range $name, $values := .Values.benchmarkDeployments.instances }}
+{{- if $values.enabled }}
+{{- $spec := deepCopy $defaults | merge $values.spec }}
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ $app }}-{{ $name }}
+  labels:
+    {{- $labels | nindent 4 }}
+    benchmark: {{ $name }}
+spec:
+  replicas: {{ $spec.replicas }}
+  selector:
+    matchLabels:
+      {{- $selectorLabels | nindent 6 }}
+      benchmark: {{ $name }}
+  template:
+    metadata:
+      {{- with $spec.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- $labels | nindent 8 }}
+        {{- with $spec.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+        benchmark: {{ $name }}
+    spec:
+     {{- with $spec.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ $saName }}
+      securityContext:
+        {{- toYaml $spec.podSecurityContext | nindent 8 }}
+      containers:
+        - name: minigun
+          args:
+            - --name={{ $name }}
+            {{- range $k, $v := $spec.args }}
+            {{- if eq $k "http-header" }}
+            - --{{ $k }}='{{ $v }}'
+            {{- else }}
+            - --{{ $k }}={{ $v }}
+            {{- end }}
+            {{- end }}
+          securityContext:
+            {{- toYaml $spec.securityContext | nindent 12 }}
+          image: "{{ $spec.image.repository }}:{{ $spec.image.tag }}"
+          imagePullPolicy: {{ $spec.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: {{ $spec.service.port }}
+              protocol: TCP
+          livenessProbe:
+            {{- toYaml $spec.livenessProbe | nindent 12 }}
+          readinessProbe:
+            {{- toYaml $spec.readinessProbe | nindent 12 }}
+          resources:
+            {{- toYaml $spec.resources | nindent 12 }}
+          {{- with $spec.volumeMounts }}
+          volumeMounts:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+      {{- with $spec.volumes }}
+      volumes:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with $spec.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with $spec.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with $spec.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+{{- end }}
+{{- end }}

chart/minigun/templates/service.yaml

@@ -0,0 +1,27 @@
+{{- $defaults := .Values.benchmarkDeployments.defaults }}
+{{- $app :=  include "minigun.fullname" . }}
+{{- $labels := include "minigun.labels" . }}
+{{- $selectorLabels := include "minigun.selectorLabels" . }}
+{{- range $name, $values := .Values.benchmarkDeployments.instances }}
+{{- if $values.enabled }}
+{{- $spec := deepCopy $defaults | merge $values.spec }}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ $app }}-{{ $name }}
+  labels:
+    {{- $labels | nindent 4 }}
+    benchmark: {{ $name }}
+spec:
+  type: {{ $spec.service.type }}
+  ports:
+    - port: {{ $spec.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    {{- $selectorLabels | nindent 4 }}
+    benchmark: {{ $name }}
+{{- end }}
+{{- end }}

chart/minigun/templates/serviceaccount.yaml

@@ -0,0 +1,13 @@
+{{- if and .Values.benchmarkDeployments.serviceAccount.create (ne .Values.benchmarkDeployments.serviceAccount.name "default")}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ .Values.benchmarkDeployments.serviceAccount.name }}
+  labels:
+    {{- include "minigun.labels" . | nindent 4 }}
+  {{- with .Values.benchmarkDeployments.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+automountServiceAccountToken: {{ .Values.benchmarkDeployments.serviceAccount.automount }}
+{{- end }}

chart/minigun/templates/servicemonitor.yaml

@@ -0,0 +1,37 @@
+{{- $defaults := .Values.benchmarkDeployments.defaults }}
+{{- $app :=  include "minigun.fullname" . }}
+{{- $labels := include "minigun.labels" . }}
+{{- $selectorLabels := include "minigun.selectorLabels" . }}
+{{- range $name, $values := .Values.benchmarkDeployments.instances }}
+{{- if $values.enabled }}
+{{- $spec := deepCopy $defaults | merge $values.spec }}
+{{- if $spec.serviceMonitor.enabled }}
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ $app }}-{{ $name }}
+  labels:
+    {{- $labels | nindent 4 }}
+    benchmark: {{ $name }}
+spec:
+  endpoints:
+  - interval: {{ $spec.serviceMonitor.interval }}
+    metricRelabelings:
+    - action: keep
+      regex: "^minigun_.*"
+      sourceLabels:
+      - __name__
+    path: /metrics
+    port: http
+    relabelings:
+    scheme: http
+    scrapeTimeout: {{ $spec.serviceMonitor.scrapeTimeout }}
+  jobLabel: app.kubernetes.io/instance
+  selector:
+    matchLabels:
+      {{- $selectorLabels | nindent 6 }}
+      benchmark: {{ $name }}
+{{- end }}
+{{- end }}
+{{- end }}