---
apiVersion: v1
kind: Namespace
metadata:
  name: mail
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: stalwart-data
  namespace: mail
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: hcloud-volumes-encrypted
  resources:
    requests:
      storage: 20Gi
---
# Secret managed via SealedSecrets
# See: stalwart-admin-credentials-sealed.yaml
---
apiVersion: v1
kind: Service
metadata:
  name: stalwart
  namespace: mail
spec:
  type: ClusterIP
  clusterIP: None
  selector:
    app: stalwart
  ports:
    - name: smtp
      port: 25
      targetPort: 25
      protocol: TCP
    - name: submission
      port: 587
      targetPort: 587
      protocol: TCP
    - name: submissions
      port: 465
      targetPort: 465
      protocol: TCP
    - name: imap
      port: 143
      targetPort: 143
      protocol: TCP
    - name: imaps
      port: 993
      targetPort: 993
      protocol: TCP
    - name: http
      port: 8080
      targetPort: 8080
      protocol: TCP
    - name: sieve
      port: 4190
      targetPort: 4190
      protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
  name: stalwart-smtp
  namespace: mail
spec:
  type: LoadBalancer
  selector:
    app: stalwart
  ports:
    - name: smtp
      port: 25
      targetPort: 25
      protocol: TCP
    - name: submission
      port: 587
      targetPort: 587
      protocol: TCP
    - name: submissions
      port: 465
      targetPort: 465
      protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
  name: stalwart-imap
  namespace: mail
spec:
  type: LoadBalancer
  selector:
    app: stalwart
  ports:
    - name: imap
      port: 143
      targetPort: 143
      protocol: TCP
    - name: imaps
      port: 993
      targetPort: 993
      protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
  name: stalwart-http
  namespace: mail
spec:
  type: ClusterIP
  selector:
    app: stalwart
  ports:
    - name: http
      port: 8080
      targetPort: 8080
      protocol: TCP
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: stalwart
  namespace: mail
spec:
  serviceName: stalwart
  replicas: 1
  selector:
    matchLabels:
      app: stalwart
  template:
    metadata:
      labels:
        app: stalwart
    spec:
      securityContext:
        fsGroup: 2000
        runAsUser: 2000
        runAsGroup: 2000
      initContainers:
      - name: fix-permissions
        image: busybox
        command: ["sh", "-c", "chown -R 2000:2000 /opt/stalwart && chmod -R 755 /opt/stalwart"]
        volumeMounts:
        - name: data
          mountPath: /opt/stalwart
      containers:
      - name: stalwart
        image: stalwartlabs/stalwart:latest
        ports:
        - containerPort: 25
          name: smtp
        - containerPort: 587
          name: submission
        - containerPort: 465
          name: submissions
        - containerPort: 143
          name: imap
        - containerPort: 993
          name: imaps
        - containerPort: 8080
          name: http
        - containerPort: 4190
          name: sieve
        volumeMounts:
        - name: data
          mountPath: /opt/stalwart
        - name: data
          mountPath: /etc/stalwart
          subPath: etc
        livenessProbe:
          httpGet:
            path: /healthz/live
            port: 8080
          initialDelaySeconds: 30
          periodSeconds: 10
          timeoutSeconds: 5
          failureThreshold: 3
        readinessProbe:
          httpGet:
            path: /healthz/ready
            port: 8080
          initialDelaySeconds: 10
          periodSeconds: 5
          timeoutSeconds: 3
          failureThreshold: 3
        resources:
          requests:
            memory: "512Mi"
            cpu: "250m"
          limits:
            memory: "2Gi"
            cpu: "2000m"
        securityContext:
          runAsNonRoot: true
          allowPrivilegeEscalation: false
          capabilities:
            drop: [ALL]
            add: [NET_BIND_SERVICE]
          seccompProfile:
            type: RuntimeDefault
      volumes:
      - name: data
        persistentVolumeClaim:
          claimName: stalwart-data
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: stalwart-web
  namespace: mail
  annotations:
    cert-manager.io/cluster-issuer: "letsencrypt-prod"
    traefik.ingress.kubernetes.io/router.entrypoints: websecure
spec:
  ingressClassName: traefik
  tls:
  - hosts:
    - mail.basicstack.de
    secretName: stalwart-tls
  rules:
  - host: mail.basicstack.de
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: stalwart-http
            port:
              number: 8080