feat: add edu_master k8s manifests for k0s migration

edu_master/k8s/session-keeper.yaml

@@ -0,0 +1,52 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: session-keeper
+  namespace: edu-master
+  labels:
+    app: edu-master-session-keeper
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: edu-master-session-keeper
+  template:
+    metadata:
+      labels:
+        app: edu-master-session-keeper
+    spec:
+      initContainers:
+        - name: wait-redis
+          image: redis:alpine
+          command:
+            - /bin/sh
+            - -ec
+            - |
+              i=0
+              until redis-cli -h redis ping | grep -q PONG; do
+                i=$((i+1))
+                [ "$i" -ge 300 ] && echo "TIMEOUT: redis not ready" && exit 1
+                sleep 2
+              done
+              echo "redis is ready"
+      containers:
+        - name: session-keeper
+          image: gcr.forust.xyz/forust/session-keeper:latest
+          imagePullPolicy: Always
+          envFrom:
+            - secretRef:
+                name: edu-master-secrets
+          resources:
+            requests:
+              cpu: 25m
+              memory: 96Mi
+            limits:
+              cpu: 250m
+              memory: 256Mi
+          readinessProbe:
+            exec:
+              command: ["/bin/sh", "-ec", "redis-cli -h redis EXISTS EDU_PHPSESSID | grep -q 1"]
+            initialDelaySeconds: 15
+            periodSeconds: 30
+            timeoutSeconds: 5
+            failureThreshold: 10