fix(matrix-stack): shorten HelmRelease reconcile interval to 1m

Live-tested Issue #38's rotation: after merging the automated rotation
PR, coturn restarted quickly (Kustomization-level, 1m interval), but
synapse-main lagged behind since it depends on this separate HelmRelease
with its own 5m interval - a real (self-healing, but avoidable) window
where coturn had the new TURN secret and Synapse still had the old one,
which would reject each other's credentials/relayed media. Matching the
interval to production-apps's 1m tightens that window without needing
any new automation.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/production/coturn-secret.yaml

@@ -4,19 +4,28 @@ metadata:
     name: coturn-secret
     namespace: matrix
 stringData:
-    TURN_SECRET: ENC[AES256_GCM,data:SILIqMB+fmAMFITAL7lG1hOgICec6BJf1mOcK0gdmnCHWYqRuJv7jgjfGylG25xzQKi+zE7Qual9PnkZG2KiOA==,iv:+GZqLGusE4Q0x2jEEtFxj06rryyQmQhXdkTy4eE8ZHw=,tag:OpSZkinPTAi1ZKWyo8OX3A==,type:str]
+    TURN_SECRET: ENC[AES256_GCM,data:gab4MSNlRANQz/T/Xn0Z45tkUvQ3Uxn5u0MyYfhZTan49P865UbX4rYPf/KmKsekdwFdOGBzvCgcwxhddVbZ1w==,iv:INbz5UUxgA6xdsPBp5W9Mwe+kd9dhHh2Rx5l3yeNRIQ=,tag:dgk/iFjvst7Wul9Lai2QEQ==,type:str]
 sops:
     age:
-        - recipient: age14l0hwfqylwpemz5y2ghh2yxk0phszlnj3qlejhue0fw0kz3tmfgqdsjzdh
-          enc: |
+        - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAyRk1mK3NWc1l4T0JCOFpF
-            S0RuQ3ViZmo3QTNVL2JvZ0hzMy91R2l0TEhzCk01a1VGdk1sdVg4aWswTzRibXI4
-            ZlJtNFF5MjBONEZOaWVpeU5taHl2bkEKLS0tIGxpUHY3NUFLWFBaWm1QSlZiVFkx
-            MEJleHFnd3oyT3VPL2dsYkpMUlRkOWMKcKUIgsQ/ff49pGGXMnYwJmwqPVC7woAR
-            IEzvhcNX97xx746SnrxZe5t2YadsYMkYIl0nvqBPJhSlvqMNafpQbQ==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBQMncxOEhRZC9jcHpjT3dW
+            Q1RNaW5pc00zVnJhWHRnZHd3TGhURWNZU2dJCk85bXJkbTEyd1ZybjhDT05pL2c3
+            ZU9EUSt1eDlSQWJyVGtsak1oS3FSR2sKLS0tIEFUdXVHL0V1ZW5VMVVBZEJaYUIw
+            U1BrYlJyQVZkZFhBdmdwbDMyK3lTQkkKEaSy1o+IICf2uaT6olapRJa/duXxjOBg
+            OqRS9axnJ71XxEnHjLTsCbkI5b+8Fux08qKaH9sMsJrWOiSHDdTXXQ==
             -----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]
+          recipient: age14l0hwfqylwpemz5y2ghh2yxk0phszlnj3qlejhue0fw0kz3tmfgqdsjzdh
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAwQk82eGdWRmdRNFJQR0xF
+            SWhNRUtNWThZNFM0aXU3V0N4UkhtTy9NTFdnCi9pa3dsVXRja1dTL1pZTnoxQ0JT
+            UUIxekZnVGUvdFgyblFiS0JLMjU3L2cKLS0tIE1IRTJ0M3kvMFZPWVVDYjJlVkk0
+            eGJQOTVUc1NsNE5GdmJtODlmdHp3c2cKHTP6YRMTdYE/iBuSZs/Tjt4TwKCxHEIu
+            f3jTblKIqWwRHKCgOIkC16QDbpMBlNLH3JknJEdIjkB2HIrXrw1MNA==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age1x4jjwc8nuttwr8us924pvdc6dll5npkc6c8f4zf2hx5d2qu75dtqx0fm0d
     encrypted_regex: ^(data|stringData)$
+    lastmodified: "2026-07-28T19:26:57Z"
+    mac: ENC[AES256_GCM,data:zU3i1WGY1X4igBYzfC1WAWdtMQZWGBSacaJpXnUVt6+BCfucqaH807IRWpWbTR0+xuLteaqcdXuVuAlStqs/VV586Q4cD2FfWDeBq/O09HEwTrfekTjAyyu7zCFyZ2ja+kB4DQ83NoscCiNwNmfTZF+6RzMqx7yphPxK5go1r7c=,iv:6FIYWsNvz78zJscbxyDgy1u6ur20MnOMkMcsA4329OI=,tag:uSDpAWEixGcVmtOloMoKuw==,type:str]
     version: 3.12.2

apps/production/coturn.yaml

@@ -65,6 +65,17 @@ metadata:
   namespace: matrix
 spec:
   replicas: 1
+  # hostNetwork pods bind directly to the node's ports (3478/5349) - on this single-node
+  # cluster, RollingUpdate's default "bring up the new pod before removing the old one"
+  # can never schedule (port conflict). Recreate kills the old pod first.
+  # Note: switching to Recreate on an existing Deployment that already had the
+  # RollingUpdate defaults recorded required a one-time manual
+  # `kubectl patch --type=merge -p '{"spec":{"strategy":{"rollingUpdate":null,"type":"Recreate"}}}'`
+  # (2026-07-28) - a YAML `rollingUpdate: null` in this file is dropped before reaching the
+  # API server (client-side omits null keys) rather than sent as an explicit field deletion,
+  # so it can't clear an already-set field on its own.
+  strategy:
+    type: Recreate
   selector:
     matchLabels:
       app: coturn
@@ -74,6 +85,10 @@ spec:
         app: coturn
       annotations:
         prometheus.io/scrape: "false"
+        # Bumped on every TURN_SECRET rotation (Issue #38) to force a new pod, since
+        # Kubernetes doesn't restart running pods when a referenced Secret's content
+        # changes and the initContainer that reads it only runs once at pod start.
+        rotated-at: "2026-07-28T19:26:57Z"
     spec:
       hostNetwork: true
       dnsPolicy: ClusterFirstWithHostNet

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

@@ -58,15 +58,6 @@ data:
             room_list_publication_rules:
               - user_id: "*"
                 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

@@ -4,7 +4,11 @@ metadata:
   name: matrix-stack
   namespace: matrix
 spec:
-  interval: 5m
+  # Shortened from 5m to match production-apps Kustomization's 1m interval - narrows the
+  # window between coturn (Kustomization-only, no Helm indirection) and synapse-main
+  # (behind this HelmRelease) picking up a rotated TURN secret after Issue #38's
+  # automated-rotation PR gets merged. Self-heals either way, just faster now.
+  interval: 1m
   chart:
     spec:
       chart: matrix-stack
@@ -25,7 +29,10 @@ spec:
     - kind: Secret
       name: ess-mas-values-secret
       valuesKey: values.yaml
-      
+    - kind: Secret
+      name: synapse-turn-secret
+      valuesKey: values.yaml
+
   values:
     # Top-Level: serverName – das ist dein Matrix-Homeserver-Name
     serverName: axion1337.chat

apps/production/kustomization.yaml

@@ -1,8 +1,10 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
-# Patch: Fügt einen Checksum der element-values.yaml zur HelmRelease hinzu
-# Damit wird Flux die HelmRelease neu-synced wenn sich die ConfigMap ändert
+# Patch: Fügt Checksums der element-values.yaml und des turn_shared_secret zur
+# HelmRelease hinzu. Damit wird Flux die HelmRelease neu-synced (und synapse-main neu
+# gestartet), wenn sich die jeweilige ConfigMap/Secret ändert - siehe Issue #38's
+# Rotations-Mechanismus, der turn-secret-checksum bei jeder Rotation bumpt.
 patches:
   - target:
       kind: HelmRelease
@@ -12,6 +14,9 @@ patches:
       - op: add
         path: /metadata/annotations/element-config-checksum
         value: "401f8a87d0ef5d91d2e5032d4aede42c"
+      - op: add
+        path: /metadata/annotations/turn-secret-checksum
+        value: "d220c0e4ff8f7106328c8827d47e8734"
 
 resources:
   - matrix-postgres-auth.yaml
@@ -26,6 +31,7 @@ resources:
   # TURN Server für WebRTC
   - coturn-secret.yaml
   - coturn.yaml
+  - synapse-turn-secret.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
@@ -33,4 +39,7 @@ resources:
   - networkpolicy.yaml
   # Backup zur Hetzner Storage Box (Issues #6 + #15)
   - synapse-backup-secret.yaml
-  - synapse-backup.yaml
+  - synapse-backup.yaml
+  # Automatisierte TURN-Secret-Rotation (Issue #38)
+  - turn-secret-rotation-secret.yaml
+  - turn-secret-rotation.yaml

apps/production/synapse-turn-secret.yaml

@@ -0,0 +1,31 @@
+apiVersion: v1
+kind: Secret
+metadata:
+    name: synapse-turn-secret
+    namespace: matrix
+stringData:
+    values.yaml: ENC[AES256_GCM,data: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,iv:bPK1+PViBg046N3q2Eb1ZOJOYv7X/HgpCEU/MLp7o6k=,tag:/2Kyv7aB4baOL+3KdAeQ9w==,type:str]
+sops:
+    age:
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBuK2xIT3M0cGtVOHdKYklF
+            OHl1VHFRTkVSaHVQNUUyRlhZUjRWM3JUN0hBCnpUS2YzdG1mSjlRaEVvTHdKVkR4
+            L1hrR05IRUdqdGp2aU95aWxRRXdsQWcKLS0tICtLbnFsK3Zza053VXFWdVErRy92
+            WUUzZTBIRzUyWnp5a1ZScUVqb0NyencKvnFyJCR6j1/aH4gJvFmLPNlk5XpC08wF
+            mTmL981uGfz4NULc+O3sDkonJ827glpefgWPgPW2HmKT88d4A9vyJw==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age14l0hwfqylwpemz5y2ghh2yxk0phszlnj3qlejhue0fw0kz3tmfgqdsjzdh
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBVY0NXa1B5c2RzbzRReU1h
+            RHBSbk9aK3d6VjRWZ1hzL3FDZFZJZGFqTVQ0Ck9ib0p3bkR6cU8yc0VFNjEzSFFi
+            T3dWY1luQW1VZ1NjZFNoZFFLSCsvelkKLS0tIHIxV0d6TWhpSEc3d3c0L1VvOWxk
+            eDhTM2pDbTNXZXlWRVYxR2tPQU5iLzgKrLLLSBU/g5ebeRNi7hWYbcuJ/2JOfiUn
+            0DBnzMVJPBfqq/u8THiRYaMajx3k4D9+FN7qc5nBgTd85iGBo+OowA==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age1x4jjwc8nuttwr8us924pvdc6dll5npkc6c8f4zf2hx5d2qu75dtqx0fm0d
+    encrypted_regex: ^(data|stringData)$
+    lastmodified: "2026-07-28T19:26:57Z"
+    mac: ENC[AES256_GCM,data:UfD+QJel9FygoKPM02KdOLvP1id/21ghQ0uWAQJxEs/w+B2vVkpe/dXSJ7QnI0e528ns1HW81GAxkxyAupsUDq8/pBdEQgItwDs5DIgHvH+sTPAtj2Kyq2wMOeEt+XDGLRdOlAwbcKDS/LyfeZ5b9QnAbY2w/tTinTkzEvbudT8=,iv:WmmwjAmZmM0W8dvqBcv9XYZkYtan3lg0Sb8ypVuGoJk=,tag:3yzZhSFtbSbLUXSdDWGAtw==,type:str]
+    version: 3.13.3

apps/production/turn-secret-rotation-secret.yaml

@@ -0,0 +1,23 @@
+apiVersion: v1
+kind: Secret
+metadata:
+    name: turn-secret-rotation-credentials
+    namespace: matrix
+stringData:
+    age-key.txt: ENC[AES256_GCM,data:4LAs9LLFo38UMHXCo4lun9RHxGnDyp7GWlaNdIqqkSL9lNv7+ILdlc03CxFVobCYxK65xMOn1xdEty+887JBMlawST04am/5MkAnUivKwXCw8OHmbZhCwKHFqSYH/NsgVNf+btZKIIny8XPVQAPj/vQIi+Ity+BQyPkEZ1WUcsqjDoaK9IFhQTePJtHgWivhOY2WpUt/TP7vTfub4TOrgVpzNd9LIpBkwq+zhpVXKwnYUWOuLMXlPe08kazy,iv:9A24HbTl24slj+qTCfyI01+dGqRFVPDUA0wp2kSUHpc=,tag:iQxU0dWD4Noo1m0HXhV6vQ==,type:str]
+    gitea-token: ENC[AES256_GCM,data:cmZ1GCrqRYLtLn+cRVZCrO7UcCIavlQLJPt2PRMtBbgLdhDVTElUKA==,iv:9v29GXHRtDlrL3PoRCdOqYpBepZrX04+6UjoywRZX0E=,tag:ZvYXBOm9qgB1XA5lkV4LsQ==,type:str]
+sops:
+    age:
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA5S3BtTHNLVGVVM2ZpTlZS
+            Y3pGMS9CSkNsdUpPbWtkSTRHK0p6U2lwdEJnClVWdXp4SllyM1hvbTZyTU40SDc2
+            QlVtMDduZWpaVENiYnhMNlFXd01QblEKLS0tIGNzTGRZcmoyaFltUHRDSHBPZE1N
+            OCszUkl1VjQ5V3F2cVI4dXJFcER5YXcK+2Eh1JNLuMiCnpQ3cL/I7XTykkIZ3tqp
+            O3c9UwYs1FAZWlMgElTBTqsmut1ShduIYfDFRKGeS0UxPEM4U+tIGw==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age14l0hwfqylwpemz5y2ghh2yxk0phszlnj3qlejhue0fw0kz3tmfgqdsjzdh
+    encrypted_regex: ^(data|stringData)$
+    lastmodified: "2026-07-28T19:21:28Z"
+    mac: ENC[AES256_GCM,data:vx6Bs/L0NXKUvvQdu6aYtuur/CYPkIBZzvFLqTyd08Errw0dGMrg73oHQ/imxpe42HgnO2mGwxNdEx2jYYbtc3RBWHE/yPH5m8y/XLoSL3fauzbkGsDwMSWzKiZXyIuGh7SxuB+CFY9qqFMK+dap1Ofno7a1/Gr1qibVDqscwxw=,iv:9AUQQuTCja09OohzVw73URMHE8xCW7iLLtBg7GSDcPA=,tag:g1ibnBIGqokvs2IEVOYq6Q==,type:str]
+    version: 3.13.3

apps/production/turn-secret-rotation.yaml

@@ -0,0 +1,70 @@
+# Automated TURN shared-secret rotation (Issue #38). Generates a new secret, re-encrypts
+# apps/production/coturn-secret.yaml and synapse-turn-secret.yaml using a dedicated,
+# narrowly-scoped age key (see turn-secret-rotation-secret.yaml - it can only decrypt these
+# two files, not the repo's master sops-age key), bumps the checksum/rotated-at annotations
+# so a merge restarts both consumers automatically, and opens a Pull Request rather than
+# pushing straight to main - a human reviews and merges it.
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: turn-secret-rotation
+  namespace: matrix
+spec:
+  schedule: "0 4 1 * *"
+  concurrencyPolicy: Forbid
+  successfulJobsHistoryLimit: 3
+  failedJobsHistoryLimit: 3
+  jobTemplate:
+    spec:
+      backoffLimit: 1
+      template:
+        metadata:
+          labels:
+            app.kubernetes.io/name: turn-secret-rotation
+            app.kubernetes.io/component: rotation
+        spec:
+          restartPolicy: OnFailure
+          # Public-internet reachability to the Gitea host has been flaky (see Issue #41);
+          # both servers share a private Hetzner network. hostAliases (unlike the node-level
+          # /etc/hosts fix used for image pulls) is actually honored by in-pod processes.
+          hostAliases:
+            - ip: "10.0.0.3"
+              hostnames:
+                - "rohana.axion1337.de"
+          containers:
+            - name: rotate
+              image: rohana.axion1337.de/sorb/axion-secret-rotation:v1
+              env:
+                - name: GITEA_HOST
+                  value: "rohana.axion1337.de"
+                - name: GITEA_REPO
+                  value: "sorb/axion1337.chat-gitops"
+                - name: GITEA_TOKEN
+                  valueFrom:
+                    secretKeyRef:
+                      name: turn-secret-rotation-credentials
+                      key: gitea-token
+                - name: SOPS_AGE_KEY_FILE
+                  value: /secrets/age/age-key.txt
+                - name: GIT_AUTHOR_NAME
+                  value: "turn-secret-rotation"
+                - name: GIT_AUTHOR_EMAIL
+                  value: "turn-secret-rotation@axion1337.chat"
+              volumeMounts:
+                - name: age-key
+                  mountPath: /secrets/age
+                  readOnly: true
+              resources:
+                requests:
+                  cpu: 50m
+                  memory: 64Mi
+                limits:
+                  memory: 128Mi
+          volumes:
+            - name: age-key
+              secret:
+                secretName: turn-secret-rotation-credentials
+                items:
+                  - key: age-key.txt
+                    path: age-key.txt
+                    mode: 0400