feat(k8s): add Kubernetes Helm chart for emailks service
- Create Helm chart structure with Chart.yaml and values.yaml - Add deployment template with container configuration and environment variables - Implement service template for gRPC port exposure - Add service account template with security configuration - Include horizontal pod autoscaler template for scaling capabilities - Add helper templates for naming and label management - Configure SMTP settings as configurable parameters in values.yaml - Set up resource limits and requests for container performance - Implement liveness and readiness probes for health checks - Add support for existing secrets and custom configurations
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zhenyi
@@ -0,0 +1,38 @@
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{{- define "emailks.name" -}}
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{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
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{{- end }}
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{{- define "emailks.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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{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
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{{- end }}
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{{- end }}
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{{- define "emailks.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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{{- define "emailks.labels" -}}
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helm.sh/chart: {{ include "emailks.chart" . }}
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{{ include "emailks.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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{{- define "emailks.selectorLabels" -}}
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app.kubernetes.io/name: {{ include "emailks.name" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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{{- end }}
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{{- define "emailks.serviceAccountName" -}}
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{{- if .Values.serviceAccount.create }}
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{{- default (include "emailks.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 }}
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@@ -0,0 +1,109 @@
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: {{ include "emailks.fullname" . }}
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labels:
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{{- include "emailks.labels" . | nindent 4 }}
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spec:
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replicas: {{ .Values.replicaCount }}
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selector:
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matchLabels:
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{{- include "emailks.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 "emailks.selectorLabels" . | nindent 8 }}
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{{- with .Values.podLabels }}
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{{- toYaml . | nindent 8 }}
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{{- end }}
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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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serviceAccountName: {{ include "emailks.serviceAccountName" . }}
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securityContext:
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{{- toYaml .Values.podSecurityContext | nindent 8 }}
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containers:
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- name: {{ .Chart.Name }}
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securityContext:
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{{- toYaml .Values.securityContext | nindent 12 }}
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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: grpc
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containerPort: 50051
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protocol: TCP
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env:
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- name: APP_SMTP_HOST
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value: {{ required "smtp.host is required" .Values.smtp.host | quote }}
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- name: APP_SMTP_PORT
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value: {{ .Values.smtp.port | quote }}
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- name: APP_SMTP_TLS
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value: {{ .Values.smtp.tls | quote }}
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{{- with .Values.smtp.username }}
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- name: APP_SMTP_USERNAME
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value: {{ . | quote }}
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{{- end }}
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{{- if .Values.existingSecret.name }}
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- name: APP_SMTP_PASSWORD
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valueFrom:
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secretKeyRef:
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name: {{ .Values.existingSecret.name }}
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key: {{ .Values.existingSecret.passwordKey }}
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{{- else if .Values.smtp.password }}
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- name: APP_SMTP_PASSWORD
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value: {{ .Values.smtp.password | quote }}
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{{- end }}
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- name: APP_SMTP_FROM_EMAIL
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value: {{ .Values.smtp.fromEmail | quote }}
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{{- with .Values.smtp.fromName }}
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- name: APP_SMTP_FROM_NAME
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value: {{ . | quote }}
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{{- end }}
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{{- with .Values.smtp.replyTo }}
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- name: APP_SMTP_REPLY_TO
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value: {{ . | quote }}
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{{- end }}
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- name: APP_SMTP_TIMEOUT_SECS
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value: {{ .Values.smtp.timeoutSecs | quote }}
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{{- with .Values.smtp.heloName }}
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- name: APP_SMTP_HELO_NAME
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value: {{ . | quote }}
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{{- end }}
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- name: APP_SMTP_ALLOW_REQUEST_FROM
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value: {{ .Values.smtp.allowRequestFrom | quote }}
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- name: APP_SMTP_QUEUE_CAPACITY
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value: {{ .Values.queue.capacity | quote }}
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- name: APP_SMTP_LISTEN_ADDR
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value: {{ .Values.listenAddr | quote }}
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- name: RUST_LOG
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value: {{ .Values.logLevel | quote }}
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livenessProbe:
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tcpSocket:
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port: grpc
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initialDelaySeconds: 5
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periodSeconds: 10
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readinessProbe:
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tcpSocket:
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port: grpc
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initialDelaySeconds: 3
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periodSeconds: 5
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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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 }}
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@@ -0,0 +1,24 @@
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{{- if .Values.autoscaling.enabled }}
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apiVersion: autoscaling/v2
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kind: HorizontalPodAutoscaler
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metadata:
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name: {{ include "emailks.fullname" . }}
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labels:
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{{- include "emailks.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 "emailks.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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target:
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type: Utilization
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averageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
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{{- end }}
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{{- end }}
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@@ -0,0 +1,15 @@
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apiVersion: v1
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kind: Service
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metadata:
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name: {{ include "emailks.fullname" . }}
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labels:
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{{- include "emailks.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: {{ .Values.service.targetPort }}
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protocol: TCP
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name: grpc
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selector:
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{{- include "emailks.selectorLabels" . | nindent 4 }}
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@@ -0,0 +1,13 @@
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{{- if .Values.serviceAccount.create -}}
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: {{ include "emailks.serviceAccountName" . }}
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labels:
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{{- include "emailks.labels" . | nindent 4 }}
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{{- with .Values.serviceAccount.annotations }}
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annotations:
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{{- toYaml . | nindent 4 }}
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{{- end }}
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automountServiceAccountToken: false
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{{- end }}
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