fix(edu): deploy reviewed application release with Redis authentication

edu_master/README.md

@@ -0,0 +1,14 @@
+# EDU deployment ownership
+
+Application source and release builds: `forust/edu-master`.
+The homelab pipeline deploys `edu_master/k8s` and preserves explicit image digests.
+The application copies in this directory are legacy and are not build inputs.
+Do not publish EDU `prod` images from homelab or resolve releases from moving tags.
+
+For an EDU release, validate both images, select their digests in the keeper and
+checker manifests, and run the existing homelab validation/apply/verification
+helpers against this service. Keep the existing Secret and Redis PVC.
+Coordinate Redis authentication changes with both clients and all init/probes;
+keep a pre-rollout Redis backup and both previous compatible image references.
+The current HTTP checker does not depend on Playwright; check other consumers
+before removing the separate browser service.

edu_master/k8s/alerts.yaml

@@ -50,7 +50,36 @@ spec:
             severity: critical
           annotations:
             summary: "Webinar checker failing consecutively"
-            description: 'edu-master/webinar-checker: {{ $value }} consecutive webinar check failures (timeout / playwright error / page error). Check pod logs (Loki: {namespace="edu-master", container="webinar-checker"}).'
+            description: 'edu-master/webinar-checker: {{ $value }} consecutive webinar check failures (timeout / http error / page error). Check pod logs (Loki: {namespace="edu-master", container="webinar-checker"}).'
+
+        - alert: WebinarCheckerNeverStarted
+          expr: |
+            (time() - edu_process_start > 120)
+              and (webinar_check_last_run_timestamp_seconds == 0)
+          for: 2m
+          labels:
+            severity: critical
+          annotations:
+            summary: "Webinar checker job has not started"
+            description: "The process exposes metrics but its webinar job has never started."
+
+        - alert: WebinarDeliveryPending
+          expr: edu_delivery_pending > 0
+          for: 5m
+          labels:
+            severity: warning
+          annotations:
+            summary: "Webinar notifications await delivery"
+            description: "Telegram delivery has pending recipients. Check delivery failures and retry status."
+
+        - alert: EduRedisUnavailable
+          expr: edu_redis_connected == 0
+          for: 2m
+          labels:
+            severity: critical
+          annotations:
+            summary: "EDU checker cannot reach Redis"
+            description: "Redis health checks are failing; checker commands and delivery may be unavailable."
 
         # Metrics endpoint not scraped for 10m: pod down, metrics server dead, or ServiceMonitor broken.
         - alert: WebinarCheckerScrapeDown
@@ -74,7 +103,7 @@ spec:
             summary: "EDU_PHPSESSID missing"
             description: "edu-master: EDU_PHPSESSID absent from redis for 10m. Webinar/diari/schedule checks are all skipped. Check session-keeper logs and EDU credentials."
 
-        # Hard deps: checker and playwright deployments unavailable.
+        # Hard deps: checker deployment unavailable.
         - alert: WebinarCheckerDeploymentDown
           expr: |
             kube_deployment_status_replicas_unavailable{deployment="webinar-checker", namespace="edu-master"} > 0
@@ -84,13 +113,3 @@ spec:
           annotations:
             summary: "Webinar checker deployment unavailable"
             description: "edu-master/webinar-checker deployment has {{ $value }} unavailable replica(s) for 10m."
-
-        - alert: PlaywrightServiceDown
-          expr: |
-            kube_deployment_status_replicas_unavailable{deployment="playwright-service", namespace="edu-master"} > 0
-          for: 10m
-          labels:
-            severity: critical
-          annotations:
-            summary: "Playwright service unavailable"
-            description: "edu-master/playwright-service deployment has {{ $value }} unavailable replica(s) for 10m. All webinar/diari/schedule checks fail without it."

edu_master/k8s/redis-networkpolicy.yaml

@@ -0,0 +1,22 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: redis-clients-only
+  namespace: edu-master
+spec:
+  podSelector:
+    matchLabels:
+      app: edu-master-redis
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - podSelector:
+            matchLabels:
+              app: edu-master-session-keeper
+        - podSelector:
+            matchLabels:
+              app: edu-master-webinar-checker
+      ports:
+        - protocol: TCP
+          port: 6379

edu_master/k8s/redis.yaml

@@ -20,6 +20,27 @@ spec:
         - name: redis
           image: redis:8.10.2-alpine
           imagePullPolicy: IfNotPresent
+          env:
+            - name: REDIS_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: edu-master-secrets
+                  key: REDIS_PASSWORD
+            - name: REDISCLI_AUTH
+              valueFrom:
+                secretKeyRef:
+                  name: edu-master-secrets
+                  key: REDIS_PASSWORD
+          command:
+            - /bin/sh
+            - -ec
+            - |
+              case "$REDIS_PASSWORD" in *[!0-9a-fA-F]*|'') echo 'REDIS_PASSWORD must be 64 hex characters' >&2; exit 1;; esac
+              [ "${#REDIS_PASSWORD}" -eq 64 ] || { echo 'REDIS_PASSWORD must be 64 hex characters' >&2; exit 1; }
+              umask 077
+              printf 'requirepass "%s"\n' "$REDIS_PASSWORD" > /tmp/redis-auth.conf
+              chown redis:redis /tmp/redis-auth.conf
+              exec docker-entrypoint.sh redis-server /tmp/redis-auth.conf
           ports:
             - containerPort: 6379
           volumeMounts:

edu_master/k8s/session-keeper.yaml

@@ -16,12 +16,20 @@ spec:
     type: Recreate
   template:
     metadata:
+      annotations:
+        edu.forust.xyz/source-commit: "90829d6c8080b9928f9da23587678e640939e10a"
       labels:
         app: edu-master-session-keeper
     spec:
       initContainers:
         - name: wait-redis
           image: redis:8.10.2-alpine
+          env:
+            - name: REDISCLI_AUTH
+              valueFrom:
+                secretKeyRef:
+                  name: edu-master-secrets
+                  key: REDIS_PASSWORD
           command:
             - /bin/sh
             - -ec
@@ -35,10 +43,16 @@ spec:
               echo "redis is ready"
       containers:
         - name: session-keeper
-          image: gcr.forust.xyz/forust/session-keeper:prod
+          image: gcr.forust.xyz/forust/session-keeper@sha256:49285e87cc5bc4cf4ffe190813d87927916c2df8a206daac0aeb7d227c636450
           envFrom:
             - secretRef:
                 name: edu-master-secrets
+          env:
+            - name: REDISCLI_AUTH
+              valueFrom:
+                secretKeyRef:
+                  name: edu-master-secrets
+                  key: REDIS_PASSWORD
           resources:
             requests:
               cpu: 25m

edu_master/k8s/webinar-checker.yaml

@@ -16,14 +16,22 @@ spec:
     type: Recreate
   template:
     metadata:
+      annotations:
+        edu.forust.xyz/source-commit: "90829d6c8080b9928f9da23587678e640939e10a"
       labels:
         app: edu-master-webinar-checker
     spec:
       # Enforces dependency order like compose depends_on:
-      # redis healthy -> session-keeper healthy (EXISTS EDU_PHPSESSID) -> playwright started
+      # redis healthy -> session-keeper healthy (EXISTS EDU_PHPSESSID)
       initContainers:
         - name: wait-deps
           image: redis:8.10.2-alpine
+          env:
+            - name: REDISCLI_AUTH
+              valueFrom:
+                secretKeyRef:
+                  name: edu-master-secrets
+                  key: REDIS_PASSWORD
           command:
             - /bin/sh
             - -ec
@@ -41,15 +49,9 @@ spec:
                 sleep 2
               done
               echo "PHPSESSID ok"
-              until nc -z playwright-service 3000; do
-                i=$((i+1))
-                [ "$i" -ge 300 ] && echo "TIMEOUT: playwright-service not reachable" && exit 1
-                sleep 2
-              done
-              echo "playwright ok"
       containers:
         - name: webinar-checker
-          image: gcr.forust.xyz/forust/webinar-checker:prod
+          image: gcr.forust.xyz/forust/webinar-checker@sha256:66c146f7b43cb9f0dc31ba9aa36d217e01df42ddafba5971b79c12ec215b2c01
           ports:
             - name: metrics
               containerPort: 8000
@@ -62,6 +64,14 @@ spec:
             timeoutSeconds: 3
             failureThreshold: 12
             initialDelaySeconds: 10
+          livenessProbe:
+            httpGet:
+              path: /live
+              port: metrics
+            initialDelaySeconds: 60
+            periodSeconds: 15
+            timeoutSeconds: 3
+            failureThreshold: 4
           envFrom:
             - secretRef:
                 name: edu-master-secrets