Revert to ESS 26.4.0 - URL preview issues in 26.5.0

Add Authentik v2026.x with embedded PostgreSQL in new namespace. Includes HelmRelease with valuesFrom injection for encrypted credentials, cert-manager Certificate for auth.axion1337.chat, and Traefik IngressRoute. Authentik serves as OIDC provider for MAS; registration via invitation links only.

DNS A-record setup and Authentik UI configuration (OIDC provider creation) are manual post-deployment steps.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

apps/authentik/authentik-secret.yaml

@@ -0,0 +1,24 @@
+apiVersion: v1
+kind: Secret
+metadata:
+    name: authentik-credentials
+    namespace: authentik
+stringData:
+    secret_key: ENC[AES256_GCM,data:yIyQapbFtFM11LynFtkV3ffExhaDfN9QHeFbI1T0xkIhgsV+9sjg3qwMVmeBlAe7xZl8gsAM4kDj2Q6O91OdDg==,iv:+Cl8vOcxG9/mgRheaCO0bLWyCJXN+f1F2DD3oeHbPFY=,tag:711ytyKf6/tmXomBLoffGA==,type:str]
+    pg-password: ENC[AES256_GCM,data:3w8R9mRjMXMJDLjrC8QYaXFHsCU3yYZs2PcaFQNp3Z4=,iv:G/aXgoGz3vBOzZ5K3Y+DDJsqer4F5gvcMmtkzRx93CU=,tag:dXPs1pY/APvnMlxdvB1EkA==,type:str]
+    smtp-password: ENC[AES256_GCM,data:JpMgaQFPkBzOg5WjvpmhM0kPwvZkH+4tQjT17RJHjG14WjmWtfG9Bg==,iv:zjQRLIlrxKv5hbd4JZowNUEiibiCUMf79acZY0+dYAc=,tag:ORPafTPyOQJvVvHWQGmqhA==,type:str]
+sops:
+    age:
+        - recipient: age14l0hwfqylwpemz5y2ghh2yxk0phszlnj3qlejhue0fw0kz3tmfgqdsjzdh
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBRekJuZythYzliTFJ3RlhS
+            R2p6TG9NeFdabFlPRWtpNHJMYVVxTWZEcmlRClk0WUorSzdxNlcyWHYwWFBTMnlq
+            TlM4dENSSit2S3VGSzJCeTRTYU52dmcKLS0tIEF0WkV0M25OSEo1N0FEYXI5Q0Z6
+            QXVrY1NTeHZkeTlPRWNlVThzWno3T0kKC0KBoLT64GNqb8Ri9u69G7nqb1KftwwP
+            /24aVHrPxKi9d4ij9n3bvCYDF4rhtfexhrE4n7CfuKn2DcSiuTniuw==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2026-04-29T21:43:59Z"
+    mac: ENC[AES256_GCM,data:Y+dJppkaVZ5NOhlvwbbsF5+vDFqGUI1Ps8IcE4J7FIW4HIdMVf6RKM0EInvPUW1LaBlmelCitcE30w0As7ysNRhLY8yUDaKUvuU6mRejlNUIF8wAHzhciL2jTvAQsArHjybJatEig28+wM9VcY8JEa/d/CmuiB9Nq4WbIV+JXlA=,iv:UQj2rIVLNPjtYp3d/jRyNfJyyyUsZ3+NDCgpI4aztzc=,tag:cwiCzG/A+rfRFfLjXVt82w==,type:str]
+    encrypted_regex: ^(data|stringData)$
+    version: 3.12.2

apps/authentik/authentik.yaml

@@ -0,0 +1,87 @@
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: authentik
+  namespace: authentik
+spec:
+  interval: 1h
+  chart:
+    spec:
+      chart: authentik
+      version: "2026.2.2"
+      sourceRef:
+        kind: HelmRepository
+        name: goauthentik
+        namespace: flux-system
+  install:
+    remediation:
+      retries: 3
+  upgrade:
+    remediation:
+      retries: 3
+  valuesFrom:
+    - kind: Secret
+      name: authentik-credentials
+      valuesKey: secret_key
+      targetPath: authentik.secret_key
+    - kind: Secret
+      name: authentik-credentials
+      valuesKey: pg-password
+      targetPath: authentik.postgresql.password
+    - kind: Secret
+      name: authentik-credentials
+      valuesKey: pg-password
+      targetPath: postgresql.auth.password
+    - kind: Secret
+      name: authentik-credentials
+      valuesKey: smtp-password
+      targetPath: authentik.email.password
+  values:
+    global:
+      security:
+        allowInsecureImages: true
+
+    authentik:
+      log_level: info
+      error_reporting:
+        enabled: false
+      email:
+        host: smtp.ionos.de
+        port: 587
+        username: gamemaster@axion1337.chat
+        use_tls: true
+        from: "Authentik <gamemaster@axion1337.chat>"
+
+    server:
+      ingress:
+        enabled: false
+      resources:
+        requests:
+          cpu: 100m
+          memory: 512Mi
+        limits:
+          memory: 1Gi
+
+    worker:
+      resources:
+        requests:
+          cpu: 50m
+          memory: 512Mi
+        limits:
+          memory: 1Gi
+
+    postgresql:
+      enabled: true
+      auth:
+        username: authentik
+        database: authentik
+      primary:
+        persistence:
+          enabled: true
+          size: 8Gi
+        resources:
+          requests:
+            cpu: 50m
+            memory: 256Mi
+          limits:
+            memory: 512Mi

apps/authentik/certificate.yaml

@@ -0,0 +1,12 @@
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: auth-axion1337-chat-cert
+  namespace: authentik
+spec:
+  secretName: auth-axion1337-chat-tls
+  issuerRef:
+    name: letsencrypt-prod
+    kind: ClusterIssuer
+  dnsNames:
+    - auth.axion1337.chat

apps/authentik/helm-repo.yaml

@@ -0,0 +1,8 @@
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: goauthentik
+  namespace: flux-system
+spec:
+  interval: 1h
+  url: https://charts.goauthentik.io

apps/authentik/ingress.yaml

@@ -0,0 +1,16 @@
+apiVersion: traefik.io/v1alpha1
+kind: IngressRoute
+metadata:
+  name: authentik
+  namespace: authentik
+spec:
+  entryPoints:
+    - websecure
+  tls:
+    secretName: auth-axion1337-chat-tls
+  routes:
+    - match: Host(`auth.axion1337.chat`)
+      kind: Rule
+      services:
+        - name: authentik-server
+          port: 80

apps/authentik/kustomization.yaml

@@ -0,0 +1,9 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - namespace.yaml
+  - helm-repo.yaml
+  - authentik-secret.yaml
+  - certificate.yaml
+  - authentik.yaml
+  - ingress.yaml

apps/authentik/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: authentik

apps/production/coturn-secret.yaml

@@ -0,0 +1,22 @@
+apiVersion: v1
+kind: Secret
+metadata:
+    name: coturn-secret
+    namespace: matrix
+stringData:
+    TURN_SECRET: ENC[AES256_GCM,data:SILIqMB+fmAMFITAL7lG1hOgICec6BJf1mOcK0gdmnCHWYqRuJv7jgjfGylG25xzQKi+zE7Qual9PnkZG2KiOA==,iv:+GZqLGusE4Q0x2jEEtFxj06rryyQmQhXdkTy4eE8ZHw=,tag:OpSZkinPTAi1ZKWyo8OX3A==,type:str]
+sops:
+    age:
+        - recipient: age14l0hwfqylwpemz5y2ghh2yxk0phszlnj3qlejhue0fw0kz3tmfgqdsjzdh
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAyRk1mK3NWc1l4T0JCOFpF
+            S0RuQ3ViZmo3QTNVL2JvZ0hzMy91R2l0TEhzCk01a1VGdk1sdVg4aWswTzRibXI4
+            ZlJtNFF5MjBONEZOaWVpeU5taHl2bkEKLS0tIGxpUHY3NUFLWFBaWm1QSlZiVFkx
+            MEJleHFnd3oyT3VPL2dsYkpMUlRkOWMKcKUIgsQ/ff49pGGXMnYwJmwqPVC7woAR
+            IEzvhcNX97xx746SnrxZe5t2YadsYMkYIl0nvqBPJhSlvqMNafpQbQ==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2026-04-29T21:06:21Z"
+    mac: ENC[AES256_GCM,data:UhyR5m1HYWrZHwNLW5sg2PxbpaydWbP5cekghGlzSpQg7CYEcvZw3tJ/qB8zA19xZSM7tdSHOXdD+QytRq6qW59M1unqMaumA43B6JxQg1C1NdXAW0mkSc2WiNchvgpVii9P/TVlzSSIRwC3YGCQUsfa3SSfNzI4Z6fMuBnhYLE=,iv:4HYxbrYSRJLe1KcQ6q8bpee8/Lx1m3pPmisb/L2Mu64=,tag:l7n3u+Pg6533OzwtNUZvNw==,type:str]
+    encrypted_regex: ^(data|stringData)$
+    version: 3.12.2

apps/production/coturn.yaml

@@ -0,0 +1,162 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: coturn-config
+  namespace: matrix
+data:
+  turnserver.conf: |
+    # TURN Server configuration
+    realm=axion1337.chat
+
+    # Listen ports
+    listening-port=3478
+    listening-ip=0.0.0.0
+    alt-listening-port=5349
+    alt-listening-ip=0.0.0.0
+
+    # External IPs (for clients behind NAT)
+    relay-ip=49.13.132.245
+    external-ip=49.13.132.245
+
+    # Relay port range
+    min-bps=0
+    bps-capacity=0
+
+    # Authentication
+    use-auth-secret
+    static-auth-secret=$TURN_SECRET
+
+    # HTTPS/TLS
+    cert=/etc/coturn/tls/tls.crt
+    pkey=/etc/coturn/tls/tls.key
+
+    # Performance tuning
+    max-bps=0
+    bps-capacity=0
+    log-file=stdout
+
+    # Logging
+    verbose
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: coturn
+  namespace: matrix
+spec:
+  type: ClusterIP
+  ports:
+    - name: stun-udp
+      port: 3478
+      protocol: UDP
+    - name: stun-tcp
+      port: 3478
+      protocol: TCP
+    - name: turns-tcp
+      port: 5349
+      protocol: TCP
+  selector:
+    app: coturn
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: coturn
+  namespace: matrix
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: coturn
+  template:
+    metadata:
+      labels:
+        app: coturn
+      annotations:
+        prometheus.io/scrape: "false"
+    spec:
+      hostNetwork: true
+      dnsPolicy: ClusterFirstWithHostNet
+      initContainers:
+      - name: init-config
+        image: busybox:1.28
+        command:
+        - sh
+        - -c
+        - |
+          TURN_SECRET=$(cat /etc/coturn-secret/TURN_SECRET)
+          sed "s|\$TURN_SECRET|$TURN_SECRET|g" /etc/coturn-template/turnserver.conf > /etc/coturn/turnserver.conf
+          chmod 644 /etc/coturn/turnserver.conf
+        resources:
+          limits:
+            cpu: 100m
+            memory: 64Mi
+          requests:
+            cpu: 50m
+            memory: 32Mi
+        volumeMounts:
+        - name: config-template
+          mountPath: /etc/coturn-template
+        - name: config
+          mountPath: /etc/coturn
+        - name: secret
+          mountPath: /etc/coturn-secret
+          readOnly: true
+      containers:
+      - name: coturn
+        image: coturn/coturn:latest
+        imagePullPolicy: IfNotPresent
+        ports:
+        - name: stun-udp
+          containerPort: 3478
+          protocol: UDP
+        - name: stun-tcp
+          containerPort: 3478
+          protocol: TCP
+        - name: turns-tcp
+          containerPort: 5349
+          protocol: TCP
+        volumeMounts:
+        - name: config
+          mountPath: /etc/coturn
+        - name: tls
+          mountPath: /etc/coturn/tls
+          readOnly: true
+        resources:
+          limits:
+            cpu: 500m
+            memory: 256Mi
+          requests:
+            cpu: 100m
+            memory: 128Mi
+        livenessProbe:
+          exec:
+            command:
+            - /bin/sh
+            - -c
+            - "netstat -uln | grep 3478 || exit 1"
+          initialDelaySeconds: 30
+          periodSeconds: 10
+      volumes:
+      - name: config
+        emptyDir: {}
+      - name: config-template
+        configMap:
+          name: coturn-config
+      - name: secret
+        secret:
+          secretName: coturn-secret
+          defaultMode: 0400
+      - name: tls
+        secret:
+          secretName: turn-axion1337-chat-tls
+      affinity:
+        nodeAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+          - weight: 100
+            preference:
+              matchExpressions:
+              - key: kubernetes.io/hostname
+                operator: In
+                values:
+                - matrix

apps/production/custom-configs/element-values.yaml

@@ -14,7 +14,8 @@ data:
             "default_theme": "aXion1337 Dark",
             "show_labs_settings": true,
             "features": {
-              "feature_qr_code_login": true
+              "feature_qr_code_login": true,
+              "feature_new_room_list": false
             },
             "setting_defaults": {
               "custom_themes": [

apps/production/custom-configs/synapse-values.yaml

@@ -51,10 +51,22 @@ data:
         auto_join:
           config: |
             auto_join_rooms:
-              - "!NkFTshKWJMgdTqTbTh:axion1337.chat"
+              - "#onboarding:axion1337.chat"
             auto_join_rooms_for_guests: false
         room_publish:
           config: |
             room_list_publication_rules:
               - user_id: "*"
-                action: allow
+                action: allow
+        turn:
+          config: |
+            turn_uris:
+              - "turn:turn.axion1337.chat?transport=udp"
+              - "turn:turn.axion1337.chat?transport=tcp"
+              - "turns:turn.axion1337.chat?transport=tcp"
+            turn_shared_secret: "cab3c8408363515d9b4cdc3384a1f76ca17a973242fdfdc72b67ac4d86158527"
+            turn_user_lifetime: 86400000
+            turn_allow_guests: false
+        oembed:
+          config: |
+            oembed_enabled: true

apps/production/element-server-suite.yaml

@@ -43,6 +43,10 @@ spec:
       enabled: true
       ingress:
         host: matrix.axion1337.chat
+      additional:
+        oembed:
+          config: |
+            oembed_enabled: true
 
     # Matrix Authentication Service – braucht eine Subdomain
     matrixAuthenticationService:

apps/production/kustomization.yaml

@@ -3,12 +3,16 @@ kind: Kustomization
 resources:
   - matrix-postgres-auth.yaml
   - cert-issuer.yaml
+  - matrix-certificates.yaml
   # Neue Dateien:
   - custom-configs/synapse-values.yaml
   - custom-configs/element-values.yaml
   - custom-configs/mas-secret.yaml
   - element-web-docs-configmap.yaml
   - element-web-docs-server.yaml
+  # TURN Server für WebRTC
+  - coturn-secret.yaml
+  - coturn.yaml
   # HelmRelease (muss ganz unten stehen, damit die ConfigMaps vorher da sind!)
   - element-server-suite.yaml
   # Custom Apex Ingress für Element Web + Well-Known auf axion1337.chat

apps/production/matrix-certificates.yaml

@@ -62,3 +62,16 @@ spec:
     kind: ClusterIssuer
   dnsNames:
     - admin.axion1337.chat
+---
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: turn-axion1337-chat-cert
+  namespace: matrix
+spec:
+  secretName: turn-axion1337-chat-tls
+  issuerRef:
+    name: letsencrypt-prod
+    kind: ClusterIssuer
+  dnsNames:
+    - turn.axion1337.chat

clusters/matrix/flux-system/authentik-sync.yaml

@@ -0,0 +1,18 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: authentik-apps
+  namespace: flux-system
+spec:
+  interval: 1m
+  path: ./apps/authentik
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: flux-system
+  decryption:
+    provider: sops
+    secretRef:
+      name: sops-age
+  dependsOn:
+    - name: infra-apps

clusters/matrix/flux-system/kustomization.yaml

@@ -6,3 +6,4 @@ resources:
   - infra-sync.yaml
   - monitoring-sync.yaml
   - production-sync.yaml
+  - authentik-sync.yaml