# fc-redis — SignalR backplane for cross-product event bus
#
# Lands per Q-SO-1 resolution (2026-05-11 PM): SignalR backplane in Phase A,
# not Phase C as originally drafted. Operator directive: "Redis can be
# deployed just fine as it's another FlowerCore technology we'll want to
# manage."
#
# Phase A scope (this file):
#   - Single Redis 7.x Alpine pod
#   - 1Gi Longhorn RWO PVC for AOF persistence
#   - ClusterIP Service at `redis.fc-redis.svc.cluster.local:6379`
#   - No AUTH (in-cluster only; not exposed externally)
#   - No IngressRoute (backplane is server-to-server only)
#
# Consumers (Phase A IMPL across FC services):
#   - FlowerCore.Signage.Web (OpsConsoleHub)
#   - FlowerCore.Scoreboard.Web (ScoreboardHub)
#   - FlowerCore.SignalControl.Web
#   - FlowerCore.DMS.Web
#   - Any other product joining the cross-product event bus
#
# Each consumer adds:
#   services.AddSignalR()
#           .AddStackExchangeRedis(
#               "redis.fc-redis.svc.cluster.local:6379",
#               opts => opts.Configuration.ChannelPrefix =
#                   StackExchange.Redis.RedisChannel.Literal("fc-opsconsole"));
#
# Phase B / C follow-ons (out of scope here):
#   - Redis Sentinel for HA (3-node)
#   - AUTH password from 1Password Connect (rotate via /rotate-password)
#   - redis_exporter sidecar for Prometheus scrape
#   - Network policies restricting which namespaces can dial 6379
#
# Design: docs/signage/operations-console-phase-2-design.md §3.5
# Decision: Q-SO-1 (RESOLVED 2026-05-11 PM)
# Memory: feedback_blooming_ui_pattern_no_iframes
---
apiVersion: v1
kind: Namespace
metadata:
  name: fc-redis
  labels:
    app.kubernetes.io/part-of: flowercore
    app.kubernetes.io/managed-by: argocd
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: fc-redis-data
  namespace: fc-redis
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: longhorn
  resources:
    requests:
      storage: 1Gi
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: fc-redis-config
  namespace: fc-redis
data:
  redis.conf: |
    # Phase A — minimal config; no AUTH, no replication.
    bind 0.0.0.0
    protected-mode no
    port 6379
    tcp-backlog 511
    timeout 0
    tcp-keepalive 300

    # Persistence: AOF (fsync every second is the standard SignalR-backplane
    # durability sweet spot — the backplane only needs to survive Redis
    # restarts, not absolute zero loss).
    appendonly yes
    appendfsync everysec
    auto-aof-rewrite-percentage 100
    auto-aof-rewrite-min-size 64mb

    # Reasonable defaults — let Redis pick most things.
    maxmemory-policy allkeys-lru
    maxmemory 256mb

    # Logging
    loglevel notice
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: fc-redis
  namespace: fc-redis
  labels:
    app: fc-redis
spec:
  replicas: 1
  strategy:
    type: Recreate           # RWO PVC; do not do rolling update
  selector:
    matchLabels:
      app: fc-redis
  template:
    metadata:
      labels:
        app: fc-redis
    spec:
      securityContext:
        runAsNonRoot: true
        runAsUser: 999       # redis:7-alpine default uid
        runAsGroup: 999
        fsGroup: 999
      containers:
        - name: redis
          image: redis:7-alpine
          imagePullPolicy: IfNotPresent
          command: ["redis-server", "/etc/redis/redis.conf"]
          ports:
            - name: redis
              containerPort: 6379
          resources:
            requests:
              cpu: "50m"
              memory: "128Mi"
            limits:
              cpu: "500m"
              memory: "384Mi"
          volumeMounts:
            - name: data
              mountPath: /data
            - name: config
              mountPath: /etc/redis
              readOnly: true
          livenessProbe:
            tcpSocket:
              port: 6379
            initialDelaySeconds: 5
            periodSeconds: 10
          readinessProbe:
            exec:
              command: ["redis-cli", "ping"]
            initialDelaySeconds: 2
            periodSeconds: 5
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop: [ALL]
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: fc-redis-data
        - name: config
          configMap:
            name: fc-redis-config
---
apiVersion: v1
kind: Service
metadata:
  name: redis
  namespace: fc-redis
spec:
  type: ClusterIP
  selector:
    app: fc-redis
  ports:
    - name: redis
      port: 6379
      targetPort: 6379
      protocol: TCP