Merge pull request #278 from CodeForPhilly/k8s-helm

K8s/Helm support
CodeForPhilly · May 28, 2021 · d85f026 · d85f026
2 parents 2bebab0 + bd9e56c
commit d85f026
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diff --git a/.holo/branches/helm-chart/_paws-data-pipeline.toml b/.holo/branches/helm-chart/_paws-data-pipeline.toml
@@ -0,0 +1,3 @@
+[holomapping]
+root = "src/helm-chart"
+files = "**"
diff --git a/.holo/config.toml b/.holo/config.toml
@@ -0,0 +1,2 @@
+[holospace]
+name = "paws-data-pipeline"
diff --git a/src/client/default.conf.template b/src/client/default.conf.template
@@ -1,6 +1,6 @@
 upstream backend {
     #server paws-compose-server:5000;
-    server ${PAWS_API_HOST}:5000;
+    server server:5000;
 }
 
 server {

diff --git a/src/docker-compose.yml b/src/docker-compose.yml
@@ -34,7 +34,7 @@ services:
       - server
     environment:
       - CHOKIDAR_USEPOLLING=true
-      - PAWS_API_HOST=paws-compose-server
+      - PAWS_API_HOST=server    # paws-compose-server
     stdin_open: true
 
 

diff --git a/src/helm-chart/.helmignore b/src/helm-chart/.helmignore
@@ -0,0 +1,23 @@
+# 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/
diff --git a/src/helm-chart/Chart.yaml b/src/helm-chart/Chart.yaml
@@ -0,0 +1,23 @@
+apiVersion: v2
+name: paws-datapipeline
+description: A Helm chart for Kubernetes
+
+# 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.
+appVersion: 0.8.0
diff --git a/src/helm-chart/templates/NOTES.txt b/src/helm-chart/templates/NOTES.txt
@@ -0,0 +1,22 @@
+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ . }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "helm-chart.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "helm-chart.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "helm-chart.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(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}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}
diff --git a/src/helm-chart/templates/_helpers.tpl b/src/helm-chart/templates/_helpers.tpl
@@ -0,0 +1,62 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "helm-chart.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 "helm-chart.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 "helm-chart.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "helm-chart.labels" -}}
+helm.sh/chart: {{ include "helm-chart.chart" . }}
+{{ include "helm-chart.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "helm-chart.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "helm-chart.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "helm-chart.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "helm-chart.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
diff --git a/src/helm-chart/templates/deployment.yaml b/src/helm-chart/templates/deployment.yaml
@@ -0,0 +1,104 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "helm-chart.fullname" . }}
+  labels:
+    {{- include "helm-chart.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "helm-chart.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "helm-chart.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.hostAliases }}
+      hostAliases:
+        {{ toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "helm-chart.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        {{- with .Values.db }}
+        - name: {{ $.Chart.Name }}-db
+          image: "{{ .image.repository }}:{{ .image.tag | default $.Chart.AppVersion }}"
+          imagePullPolicy: {{ .image.pullPolicy }}
+          env:
+            - name: POSTGRES_DB
+              value: paws
+          envFrom:
+            - secretRef:
+                name: db-pass
+          ports:
+            - name: postgresql
+              containerPort: 5432
+              protocol: TCP
+          # volumeMounts:
+          #   - name: {{ $.Release.Name }}-db
+          #     mountPath: /var/lib/postgresql/data
+          #     subPath: postgresql-data
+        {{- end }}
+        {{- with .Values.server }}
+        - name: {{ $.Chart.Name }}-server
+          image: "{{ .image.repository }}:{{ .image.tag | default $.Chart.AppVersion }}"
+          imagePullPolicy: {{ .image.pullPolicy }}
+          envFrom:
+            - secretRef:
+                name: api-server-pws
+            - secretRef:
+                name: db-pass
+          ports:
+            - containerPort: 5000
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /api/user/test
+              port: 5000
+          readinessProbe:
+            httpGet:
+              path: /api/user/test
+              port: 5000
+        {{- end }}
+
+        {{- with .Values.client }}
+        - name: {{ $.Chart.Name }}-client
+          image: "{{ .image.repository }}:{{ .image.tag | default $.Chart.AppVersion }}"
+          imagePullPolicy: {{ .image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 80
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+        {{- end }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
diff --git a/src/helm-chart/templates/hpa.yaml b/src/helm-chart/templates/hpa.yaml
@@ -0,0 +1,28 @@
+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "helm-chart.fullname" . }}
+  labels:
+    {{- include "helm-chart.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "helm-chart.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        targetAverageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+{{- end }}
diff --git a/src/helm-chart/templates/ingress.yaml b/src/helm-chart/templates/ingress.yaml
@@ -0,0 +1,41 @@
+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "helm-chart.fullname" . -}}
+{{- $svcPort := .Values.service.port -}}
+{{- if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1beta1
+{{- else -}}
+apiVersion: extensions/v1beta1
+{{- end }}
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "helm-chart.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  {{- if .Values.ingress.tls }}
+  tls:
+    {{- range .Values.ingress.tls }}
+    - hosts:
+        {{- range .hosts }}
+        - {{ . | quote }}
+        {{- end }}
+      secretName: {{ .secretName }}
+    {{- end }}
+  {{- end }}
+  rules:
+    {{- range .Values.ingress.hosts }}
+    - host: {{ .host | quote }}
+      http:
+        paths:
+          {{- range .paths }}
+          - path: {{ . }}
+            backend:
+              serviceName: {{ $fullName }}
+              servicePort: {{ $svcPort }}
+          {{- end }}
+    {{- end }}
+  {{- end }}
diff --git a/src/helm-chart/templates/service.yaml b/src/helm-chart/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "helm-chart.fullname" . }}
+  labels:
+    {{- include "helm-chart.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "helm-chart.selectorLabels" . | nindent 4 }}
diff --git a/src/helm-chart/templates/serviceaccount.yaml b/src/helm-chart/templates/serviceaccount.yaml
@@ -0,0 +1,12 @@
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "helm-chart.serviceAccountName" . }}
+  labels:
+    {{- include "helm-chart.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}
diff --git a/src/helm-chart/templates/tests/test-connection.yaml b/src/helm-chart/templates/tests/test-connection.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: "{{ include "helm-chart.fullname" . }}-test-connection"
+  labels:
+    {{- include "helm-chart.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test
+spec:
+  containers:
+    - name: wget
+      image: busybox
+      command: ['wget']
+      args: ['{{ include "helm-chart.fullname" . }}:{{ .Values.service.port }}']
+  restartPolicy: Never