# Deployment + Service — Authelia (namespace: sso)
#
# Authelia is the authentication frontend: it handles username/password entry
# and redirects back to KeyCape with an authorization code. KeyCape then
# invokes the privacyIDEA adapter to perform the MFA step.
#
# Prerequisites (apply in order):
#   1. pvc.yaml          — authelia-data PVC
#   2. configmap.yaml    — authelia-config ConfigMap
#   3. create-secrets.sh — authelia-secrets (JWT, session, storage, LDAP, OIDC keys)
#   4. This file
#   5. ingress.yaml
#
# Sensitive values are passed as *_FILE env vars pointing to Secret-mounted files.
# See configmap.yaml for the full list of injected secrets.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: authelia
  namespace: sso
  labels:
    app.kubernetes.io/name: authelia
    app.kubernetes.io/part-of: net-kingdom-sso-mfa
    net-kingdom/component: sso
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: authelia
  strategy:
    type: Recreate   # single replica; SQLite cannot be accessed concurrently
  template:
    metadata:
      labels:
        app.kubernetes.io/name: authelia
        app.kubernetes.io/part-of: net-kingdom-sso-mfa
        net-kingdom/component: sso
    spec:
      securityContext:
        runAsNonRoot: true
        runAsUser: 8000    # authelia default user
        fsGroup: 8000

      containers:
        - name: authelia
          # Pin to a specific 4.x release. Check https://hub.docker.com/r/authelia/authelia
          image: authelia/authelia:4.38
          imagePullPolicy: IfNotPresent

          ports:
            - name: http
              containerPort: 9091
              protocol: TCP

          # ── Secret file paths — Authelia reads *_FILE env vars ──────────
          env:
            - name: AUTHELIA_JWT_SECRET_FILE
              value: /run/secrets/authelia/jwt_secret
            - name: AUTHELIA_SESSION_SECRET_FILE
              value: /run/secrets/authelia/session_secret
            - name: AUTHELIA_STORAGE_ENCRYPTION_KEY_FILE
              value: /run/secrets/authelia/storage_encryption_key
            - name: AUTHELIA_AUTHENTICATION_BACKEND_LDAP_PASSWORD_FILE
              value: /run/secrets/authelia/ldap_password
            - name: AUTHELIA_IDENTITY_PROVIDERS_OIDC_HMAC_SECRET_FILE
              value: /run/secrets/authelia/oidc_hmac_secret
            - name: AUTHELIA_IDENTITY_PROVIDERS_OIDC_ISSUER_PRIVATE_KEY_FILE
              value: /run/secrets/authelia/oidc_issuer_private_key

          volumeMounts:
            # Config from ConfigMap
            - name: config
              mountPath: /config/configuration.yml
              subPath: configuration.yml
              readOnly: true
            # Secrets as files
            - name: secrets
              mountPath: /run/secrets/authelia
              readOnly: true
            # Writable data (SQLite DB + notification log)
            - name: data
              mountPath: /var/authelia/data

          startupProbe:
            httpGet:
              path: /api/health
              port: 9091
            initialDelaySeconds: 5
            periodSeconds: 5
            failureThreshold: 18   # 18 × 5s = 90s for initial LDAP connection
          livenessProbe:
            httpGet:
              path: /api/health
              port: 9091
            initialDelaySeconds: 0
            periodSeconds: 15
            failureThreshold: 3
          readinessProbe:
            httpGet:
              path: /api/health
              port: 9091
            initialDelaySeconds: 0
            periodSeconds: 10
            failureThreshold: 3

          resources:
            requests:
              cpu: "50m"
              memory: "128Mi"
            limits:
              cpu: "500m"
              memory: "256Mi"

      volumes:
        - name: config
          configMap:
            name: authelia-config
        - name: secrets
          secret:
            secretName: authelia-secrets
        - name: data
          persistentVolumeClaim:
            claimName: authelia-data

---
# Service — ClusterIP; Traefik and KeyCape reach Authelia via port 9091.
apiVersion: v1
kind: Service
metadata:
  name: authelia
  namespace: sso
  labels:
    app.kubernetes.io/name: authelia
    app.kubernetes.io/part-of: net-kingdom-sso-mfa
    net-kingdom/component: sso
spec:
  type: ClusterIP
  selector:
    app.kubernetes.io/name: authelia
  ports:
    - name: http
      port: 9091
      targetPort: 9091
      protocol: TCP