docker-compose.sentinel-e2e.yml

# Sentinel topology for the Sentinel drift E2E (valkey-io/valkey#2158).
#
# Deliberately NOT part of docker-compose.test.yml: the default test run must not
# pay this startup cost. Brought up and torn down by
# apps/api/test/sentinel-topology.e2e-spec.ts, which only runs when
# RUN_SENTINEL_TESTS=true. See `pnpm test:sentinel-topology`.
#
# The point of this file is to validate the FIELD NAMES the parser reads against a
# real Sentinel reply. Hand-built fixtures cannot do that: if upstream spells a
# field differently, the parser returns an empty list and the detector goes quiet
# with no error.
services:
  sentinel-primary:
    image: valkey/valkey:8-alpine
    container_name: betterdb-sentinel-primary
    command: valkey-server --port 6379 --appendonly no
    ports:
      - '6420:6379'
    healthcheck:
      test: ['CMD', 'valkey-cli', '-p', '6379', 'ping']
      interval: 2s
      timeout: 3s
      retries: 15

  # A replica so SENTINEL REPLICAS returns a populated entry — that reply is where
  # master-host / master-port live, the fields the stale-pointer check reads.
  sentinel-replica:
    image: valkey/valkey:8-alpine
    container_name: betterdb-sentinel-replica
    command: valkey-server --port 6379 --appendonly no --replicaof sentinel-primary 6379
    ports:
      - '6421:6379'
    depends_on:
      sentinel-primary:
        condition: service_healthy
    healthcheck:
      test: ['CMD', 'valkey-cli', '-p', '6379', 'ping']
      interval: 2s
      timeout: 3s
      retries: 15

  sentinel:
    image: valkey/valkey:8-alpine
    container_name: betterdb-sentinel
    # Written at start-up rather than mounted: Sentinel REWRITES its config file,
    # so a read-only mount makes it fail on the first discovery.
    command:
      - sh
      - -c
      - |
        cat > /tmp/sentinel.conf <<EOF
        port 26379
        sentinel monitor mymaster sentinel-primary 6379 1
        sentinel down-after-milliseconds mymaster 2000
        sentinel resolve-hostnames yes
        sentinel announce-hostnames yes
        EOF
        exec valkey-sentinel /tmp/sentinel.conf
    ports:
      - '26420:26379'
    depends_on:
      sentinel-primary:
        condition: service_healthy
      sentinel-replica:
        condition: service_healthy
    healthcheck:
      test: ['CMD', 'valkey-cli', '-p', '26379', 'ping']
      interval: 2s
      timeout: 3s
      retries: 15