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themightychristhemightychris
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feat(k8s): add helm chart
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‎helm-chart/Chart.yaml‎

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apiVersion: v2
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name: chime
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description: A Helm chart for Kubernetes
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# A chart can be either an 'application' or a 'library' chart.
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#
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# Application charts are a collection of templates that can be packaged into versioned archives
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# to be deployed.
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#
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# Library charts provide useful utilities or functions for the chart developer. They're included as
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# a dependency of application charts to inject those utilities and functions into the rendering
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# pipeline. Library charts do not define any templates and therefore cannot be deployed.
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type: application
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# This is the chart version. This version number should be incremented each time you make changes
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# to the chart and its templates, including the app version.
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# Versions are expected to follow Semantic Versioning (https://semver.org/)
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version: 0.1.0
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# This is the version number of the application being deployed. This version number should be
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# incremented each time you make changes to the application. Versions are not expected to
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# follow Semantic Versioning. They should reflect the version the application is using.
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appVersion: 1.0.0

‎helm-chart/templates/_helpers.tpl‎

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

‎helm-chart/templates/deployment.yaml‎

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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: {{ include "chime.fullname" . }}
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labels:
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{{- include "chime.labels" . | nindent 4 }}
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spec:
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{{- if not .Values.autoscaling.enabled }}
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replicas: {{ .Values.replicaCount }}
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{{- end }}
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selector:
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matchLabels:
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{{- include "chime.selectorLabels" . | nindent 6 }}
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template:
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metadata:
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{{- with .Values.podAnnotations }}
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annotations:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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labels:
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{{- include "chime.selectorLabels" . | nindent 8 }}
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spec:
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{{- with .Values.imagePullSecrets }}
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imagePullSecrets:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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containers:
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- name: {{ .Chart.Name }}
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image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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ports:
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- name: http
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containerPort: 8000
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protocol: TCP
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volumeMounts:
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- name: google-api-creds
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mountPath: "/mnt/google-api-creds"
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readOnly: true
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livenessProbe:
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httpGet:
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path: /
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port: http
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readinessProbe:
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httpGet:
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path: /
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port: http
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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volumes:
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- name: google-api-creds
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secret:
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secretName: google-api-creds-json
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{{- with .Values.nodeSelector }}
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nodeSelector:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.affinity }}
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affinity:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.tolerations }}
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tolerations:
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{{- toYaml . | nindent 8 }}
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{{- end }}

‎helm-chart/templates/hpa.yaml‎

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{{- if .Values.autoscaling.enabled }}
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apiVersion: autoscaling/v2beta1
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kind: HorizontalPodAutoscaler
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metadata:
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name: {{ include "chime.fullname" . }}
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labels:
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{{- include "chime.labels" . | nindent 4 }}
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spec:
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scaleTargetRef:
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apiVersion: apps/v1
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kind: Deployment
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name: {{ include "chime.fullname" . }}
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minReplicas: {{ .Values.autoscaling.minReplicas }}
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maxReplicas: {{ .Values.autoscaling.maxReplicas }}
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metrics:
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{{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
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- type: Resource
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resource:
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name: cpu
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targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
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{{- end }}
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{{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
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- type: Resource
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resource:
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name: memory
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targetAverageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
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{{- end }}
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{{- end }}

‎helm-chart/templates/ingress.yaml‎

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{{- if .Values.ingress.enabled -}}
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{{- $fullName := include "chime.fullname" . -}}
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{{- $svcPort := .Values.service.port -}}
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{{- if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
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apiVersion: networking.k8s.io/v1beta1
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{{- else -}}
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apiVersion: extensions/v1beta1
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{{- end }}
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kind: Ingress
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metadata:
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name: {{ $fullName }}
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labels:
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{{- include "chime.labels" . | nindent 4 }}
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{{- with .Values.ingress.annotations }}
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annotations:
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{{- toYaml . | nindent 4 }}
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{{- end }}
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spec:
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{{- if .Values.ingress.tls }}
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tls:
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{{- range .Values.ingress.tls }}
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- hosts:
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{{- range .hosts }}
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- {{ . | quote }}
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{{- end }}
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secretName: {{ .secretName }}
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{{- end }}
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{{- end }}
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rules:
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{{- range .Values.ingress.hosts }}
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- host: {{ .host | quote }}
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http:
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paths:
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{{- range .paths }}
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- path: {{ . }}
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backend:
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serviceName: {{ $fullName }}
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servicePort: {{ $svcPort }}
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{{- end }}
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{{- end }}
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{{- end }}

‎helm-chart/templates/service.yaml‎

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apiVersion: v1
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kind: Service
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metadata:
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name: {{ include "chime.fullname" . }}
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labels:
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{{- include "chime.labels" . | nindent 4 }}
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spec:
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type: {{ .Values.service.type }}
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ports:
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- port: {{ .Values.service.port }}
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targetPort: http
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protocol: TCP
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name: http
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selector:
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{{- include "chime.selectorLabels" . | nindent 4 }}

‎helm-chart/values.yaml‎

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# Default values for chime.
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# This is a YAML-formatted file.
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# Declare variables to be passed into your templates.
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replicaCount: 1
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image:
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repository: docker.pkg.github.com/codeforphilly/chime/penn-chime
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pullPolicy: IfNotPresent
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# Overrides the image tag whose default is the chart appVersion.
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tag: latest
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imagePullSecrets:
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- name: regcred
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nameOverride: ""
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fullnameOverride: ""
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podAnnotations: {}
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service:
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type: ClusterIP
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port: 80
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ingress:
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enabled: true
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annotations:
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kubernetes.io/ingress.class: nginx
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nginx.ingress.kubernetes.io/proxy-body-size: "0"
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nginx.ingress.kubernetes.io/configuration-snippet: |
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# Inject Google Tag Manager:
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proxy_set_header Accept-Encoding ""; # upstream compression must be disabled
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sub_filter '</head>' '<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({"gtm.start": new Date().getTime(),event:"gtm.js"});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!="dataLayer"?"&l="+l:"";j.async=true;j.src="https://www.googletagmanager.com/gtm.js?id="+i+dl;f.parentNode.insertBefore(j,f); })(window,document,"script","dataLayer","GTM-KBZ6ZKX");</script></head>';
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sub_filter '</body>' '<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-KBZ6ZKX" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript></body>';
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hosts:
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- host: penn-chime.phl.io
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paths: [ '/' ]
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tls:
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- secretName: penn-chime-tls
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hosts:
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- penn-chime.phl.io
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resources: {}
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# We usually recommend not to specify default resources and to leave this as a conscious
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# choice for the user. This also increases chances charts run on environments with little
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# resources, such as Minikube. If you do want to specify resources, uncomment the following
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# lines, adjust them as necessary, and remove the curly braces after 'resources:'.
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# limits:
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# cpu: 100m
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# memory: 128Mi
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# requests:
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# cpu: 100m
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# memory: 128Mi
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autoscaling:
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enabled: false
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minReplicas: 1
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maxReplicas: 100
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targetCPUUtilizationPercentage: 80
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# targetMemoryUtilizationPercentage: 80
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nodeSelector: {}
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tolerations: []
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affinity: {}

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