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Merge pull request #278 from CodeForPhilly/k8s-helm
K8s/Helm support
2 parents 2bebab0 + bd9e56c commit d85f026

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‎.holo/branches/helm-chart/_paws-data-pipeline.toml‎

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[holomapping]
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root = "src/helm-chart"
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files = "**"

‎.holo/config.toml‎

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[holospace]
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name = "paws-data-pipeline"

‎src/client/default.conf.template‎

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upstream backend {
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#server paws-compose-server:5000;
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server ${PAWS_API_HOST}:5000;
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server server:5000;
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}
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server {

‎src/docker-compose.yml‎

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- server
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environment:
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- CHOKIDAR_USEPOLLING=true
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- PAWS_API_HOST=paws-compose-server
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- PAWS_API_HOST=server # paws-compose-server
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stdin_open: true
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‎src/helm-chart/.helmignore‎

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

‎src/helm-chart/Chart.yaml‎

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apiVersion: v2
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name: paws-datapipeline
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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: 0.8.0

‎src/helm-chart/templates/NOTES.txt‎

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1. Get the application URL by running these commands:
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{{- if .Values.ingress.enabled }}
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{{- range $host := .Values.ingress.hosts }}
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{{- range .paths }}
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http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ . }}
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{{- end }}
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{{- end }}
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{{- else if contains "NodePort" .Values.service.type }}
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export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "helm-chart.fullname" . }})
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export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
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echo http://$NODE_IP:$NODE_PORT
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{{- else if contains "LoadBalancer" .Values.service.type }}
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NOTE: It may take a few minutes for the LoadBalancer IP to be available.
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You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "helm-chart.fullname" . }}'
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export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "helm-chart.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
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echo http://$SERVICE_IP:{{ .Values.service.port }}
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{{- else if contains "ClusterIP" .Values.service.type }}
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export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "helm-chart.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
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export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
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echo "Visit http://127.0.0.1:8080 to use your application"
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kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
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{{- end }}

‎src/helm-chart/templates/_helpers.tpl‎

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{{/*
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Expand the name of the chart.
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*/}}
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{{- define "helm-chart.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 "helm-chart.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 "helm-chart.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 "helm-chart.labels" -}}
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helm.sh/chart: {{ include "helm-chart.chart" . }}
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{{ include "helm-chart.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 "helm-chart.selectorLabels" -}}
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app.kubernetes.io/name: {{ include "helm-chart.name" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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{{- end }}
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{{/*
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Create the name of the service account to use
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*/}}
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{{- define "helm-chart.serviceAccountName" -}}
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{{- if .Values.serviceAccount.create }}
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{{- default (include "helm-chart.fullname" .) .Values.serviceAccount.name }}
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{{- else }}
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{{- default "default" .Values.serviceAccount.name }}
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{{- end }}
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{{- end }}

‎src/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 "helm-chart.fullname" . }}
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labels:
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{{- include "helm-chart.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 "helm-chart.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 "helm-chart.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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{{- with .Values.hostAliases }}
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hostAliases:
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{{ toYaml . | nindent 8 }}
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{{- end }}
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serviceAccountName: {{ include "helm-chart.serviceAccountName" . }}
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securityContext:
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{{- toYaml .Values.podSecurityContext | nindent 8 }}
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containers:
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{{- with .Values.db }}
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- name: {{ $.Chart.Name }}-db
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image: "{{ .image.repository }}:{{ .image.tag | default $.Chart.AppVersion }}"
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imagePullPolicy: {{ .image.pullPolicy }}
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env:
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- name: POSTGRES_DB
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value: paws
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envFrom:
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- secretRef:
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name: db-pass
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ports:
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- name: postgresql
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containerPort: 5432
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protocol: TCP
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# volumeMounts:
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# - name: {{ $.Release.Name }}-db
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# mountPath: /var/lib/postgresql/data
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# subPath: postgresql-data
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{{- end }}
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{{- with .Values.server }}
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- name: {{ $.Chart.Name }}-server
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image: "{{ .image.repository }}:{{ .image.tag | default $.Chart.AppVersion }}"
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imagePullPolicy: {{ .image.pullPolicy }}
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envFrom:
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- secretRef:
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name: api-server-pws
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- secretRef:
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name: db-pass
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ports:
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- containerPort: 5000
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protocol: TCP
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livenessProbe:
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httpGet:
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path: /api/user/test
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port: 5000
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readinessProbe:
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httpGet:
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path: /api/user/test
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port: 5000
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{{- end }}
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{{- with .Values.client }}
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- name: {{ $.Chart.Name }}-client
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image: "{{ .image.repository }}:{{ .image.tag | default $.Chart.AppVersion }}"
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imagePullPolicy: {{ .image.pullPolicy }}
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ports:
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- name: http
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containerPort: 80
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protocol: TCP
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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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{{- end }}
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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 }}

‎src/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 "helm-chart.fullname" . }}
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labels:
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{{- include "helm-chart.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 "helm-chart.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 }}

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