docker-compose.yml

# ─────────────────────────────────────────────────────────────────────────────
# docker-compose.k8s.yml  —  VoidCache: build + Kubernetes deploy
#
# DUAL PURPOSE:
#   1. Local dev:   docker compose -f docker-compose.k8s.yml up --build
#   2. K8s deploy:  kompose convert -f docker-compose.k8s.yml -o k8s/base/
#                   kubectl apply -k k8s/overlays/dev
#
# QUICK START (minikube):
#   minikube start
#   eval $(minikube docker-env)                  # build directly into minikube
#   docker compose -f docker-compose.k8s.yml build
#   kompose convert -f docker-compose.k8s.yml -o k8s/base/
#   kubectl apply -k k8s/overlays/dev
#   kubectl port-forward svc/vcache 6379:6379 -n voidcache
#
# QUICK START (kind):
#   kind create cluster --name voidcache
#   docker compose -f docker-compose.k8s.yml build
#   kind load docker-image voidcache:latest --name voidcache
#   kubectl apply -k k8s/overlays/dev
#
# QUICK START (EKS/GKE/AKS):
#   docker compose -f docker-compose.k8s.yml build
#   docker tag voidcache:latest ghcr.io/YOUR_ORG/voidcache:latest
#   docker push ghcr.io/YOUR_ORG/voidcache:latest
#   # edit k8s/overlays/prod/kustomization.yaml → set your registry
#   kubectl apply -k k8s/overlays/prod
# ─────────────────────────────────────────────────────────────────────────────

name: voidcache

# ── Reusable node config ──────────────────────────────────────────────────────
x-vcache-node: &vcache-node
  image: ${REGISTRY:-voidcache}:${TAG:-latest}
  build:
    context: .
    dockerfile: Dockerfile
    # kompose uses this name for the k8s image field
  restart: unless-stopped
  environment:
    VC_CLUSTER:    "yes"
    VC_MAXMEMORY:  ${VC_MAXMEMORY:-512m}
    VC_THREADS:    ${VC_THREADS:-4}
    VC_NO_WAL:     ${VC_NO_WAL:-0}
  env_file:
    - .env.secret                  # VC_PASSWORD — never commit to git
  labels:
    kompose.image-pull-policy:  "IfNotPresent"
    kompose.controller.type:    "statefulset"
    kompose.service.type:       "ClusterIP"
    kompose.volume.size:        "10Gi"
    app.kubernetes.io/name:     "voidcache"
    app.kubernetes.io/part-of:  "voidcache-cluster"

services:

  # ── Cache node 0 ────────────────────────────────────────────────────────────
  vcache-0:
    <<: *vcache-node
    hostname: vcache-0
    environment:
      VC_CLUSTER:       "yes"
      VC_MAXMEMORY:     ${VC_MAXMEMORY:-512m}
      VC_THREADS:       ${VC_THREADS:-4}
      VC_NO_WAL:        ${VC_NO_WAL:-0}
      # In k8s, StatefulSet pods get stable DNS:
      #   <pod>.<headless-svc>.<namespace>.svc.cluster.local
      VC_ANNOUNCE_ADDR: "vcache-0.vcache-headless.voidcache.svc.cluster.local"
      VC_ANNOUNCE_PORT: "6379"
    ports:
      - target: 6379
        published: 6381           # host port for local docker-compose access
    volumes:
      - vcache-0-data:/vcache/data
      - type: bind
        source: ./docker/config/vcache.acl
        target: /vcache/config/vcache.acl
        read_only: true
    healthcheck:
      test: ["CMD", "vcli", "-h", "127.0.0.1", "-p", "6379", "--no-color", "PING"]
      interval: 10s
      timeout:  3s
      retries:  5
      start_period: 5s
    labels:
      kompose.image-pull-policy: "IfNotPresent"
      kompose.controller.type:   "statefulset"
      kompose.service.type:      "ClusterIP"
      kompose.volume.size:       "10Gi"
      app.kubernetes.io/name:    "voidcache"
      app.kubernetes.io/component: "cache"

  # ── Cache node 1 ────────────────────────────────────────────────────────────
  vcache-1:
    <<: *vcache-node
    hostname: vcache-1
    environment:
      VC_CLUSTER:       "yes"
      VC_MAXMEMORY:     ${VC_MAXMEMORY:-512m}
      VC_THREADS:       ${VC_THREADS:-4}
      VC_NO_WAL:        ${VC_NO_WAL:-0}
      VC_ANNOUNCE_ADDR: "vcache-1.vcache-headless.voidcache.svc.cluster.local"
      VC_ANNOUNCE_PORT: "6379"
    ports:
      - target: 6379
        published: 6382
    volumes:
      - vcache-1-data:/vcache/data
      - type: bind
        source: ./docker/config/vcache.acl
        target: /vcache/config/vcache.acl
        read_only: true
    healthcheck:
      test: ["CMD", "vcli", "-h", "127.0.0.1", "-p", "6379", "--no-color", "PING"]
      interval: 10s
      timeout:  3s
      retries:  5
      start_period: 5s
    labels:
      kompose.image-pull-policy: "IfNotPresent"
      kompose.controller.type:   "statefulset"
      kompose.service.type:      "ClusterIP"
      kompose.volume.size:       "10Gi"
      app.kubernetes.io/name:    "voidcache"
      app.kubernetes.io/component: "cache"

  # ── Cache node 2 ────────────────────────────────────────────────────────────
  vcache-2:
    <<: *vcache-node
    hostname: vcache-2
    environment:
      VC_CLUSTER:       "yes"
      VC_MAXMEMORY:     ${VC_MAXMEMORY:-512m}
      VC_THREADS:       ${VC_THREADS:-4}
      VC_NO_WAL:        ${VC_NO_WAL:-0}
      VC_ANNOUNCE_ADDR: "vcache-2.vcache-headless.voidcache.svc.cluster.local"
      VC_ANNOUNCE_PORT: "6379"
    ports:
      - target: 6379
        published: 6383
    volumes:
      - vcache-2-data:/vcache/data
      - type: bind
        source: ./docker/config/vcache.acl
        target: /vcache/config/vcache.acl
        read_only: true
    healthcheck:
      test: ["CMD", "vcli", "-h", "127.0.0.1", "-p", "6379", "--no-color", "PING"]
      interval: 10s
      timeout:  3s
      retries:  5
      start_period: 5s
    labels:
      kompose.image-pull-policy: "IfNotPresent"
      kompose.controller.type:   "statefulset"
      kompose.service.type:      "ClusterIP"
      kompose.volume.size:       "10Gi"
      app.kubernetes.io/name:    "voidcache"
      app.kubernetes.io/component: "cache"

  # ── HAProxy load balancer ────────────────────────────────────────────────────
  haproxy:
    image: haproxy:2.9-alpine
    restart: unless-stopped
    depends_on:
      vcache-0: { condition: service_healthy }
      vcache-1: { condition: service_healthy }
      vcache-2: { condition: service_healthy }
    ports:
      - target: 6379
        published: ${VC_PORT:-6379}   # main client endpoint
      - target: 8404
        published: 8404               # stats UI
    volumes:
      - type: bind
        source: ./docker/haproxy/haproxy.cfg
        target: /usr/local/etc/haproxy/haproxy.cfg
        read_only: true
    healthcheck:
      test: ["CMD", "haproxy", "-c", "-f", "/usr/local/etc/haproxy/haproxy.cfg"]
      interval: 10s
      timeout: 3s
      retries: 3
    labels:
      # Exposed as LoadBalancer in k8s; kompose creates a Service + optional Ingress
      kompose.service.type:    "LoadBalancer"
      kompose.service.expose:  "vcache.example.com"   # replace with your domain or remove
      kompose.image-pull-policy: "Always"
      app.kubernetes.io/name:      "voidcache"
      app.kubernetes.io/component: "proxy"

# ── Volumes ───────────────────────────────────────────────────────────────────
# In k8s these become PersistentVolumeClaims via volumeClaimTemplates
volumes:
  vcache-0-data:
  vcache-1-data:
  vcache-2-data: