full_stack.ctst

// Full-stack application: API + PostgreSQL + Redis + background worker.
// Demonstrates IMPORT, FROM, CONNECT, env, variable interpolation,
// secrets, volumes, and healthcheck.
// Run with: ctst run examples/full_stack.ctst

IMPORT "templates/postgres.ctst" AS pg
IMPORT "templates/redis.ctst" AS redis_tmpl

COMPONENT api {
    image    = "file:///opt/images/myapp-api"
    port     = 8080
    memory   = "256MiB"
    cpu      = "1024"
    env      = {
        RUST_LOG     = "${env.RUST_LOG}"
        DATABASE_URL = "postgres://${db.host}:${db.port}/myapp"
        REDIS_URL    = "redis://${cache.host}:${cache.port}/0"
        JWT_SECRET   = "${secret.jwt_key}"
    }
    command  = ["./api-server", "--bind", "0.0.0.0:8080"]
    readonly = true
    restart  = "on-failure"
    healthcheck = {
        command      = ["curl", "-f", "http://localhost:8080/healthz"]
        interval     = "10s"
        timeout      = "3s"
        retries      = 5
        start_period = "15s"
    }
}

COMPONENT db FROM pg {
    memory = "1GiB"
    volume = "/data/myapp-pg:/var/lib/postgresql/data"
    env    = {
        POSTGRES_DB       = "myapp"
        POSTGRES_USER     = "myapp_user"
        POSTGRES_PASSWORD = "${secret.db_password}"
    }
}

COMPONENT cache FROM redis_tmpl {
    memory  = "256MiB"
    command = ["redis-server", "--maxmemory", "200mb", "--maxmemory-policy", "allkeys-lru"]
}

COMPONENT worker {
    image    = "file:///opt/images/myapp-worker"
    memory   = "128MiB"
    cpu      = "512"
    env      = {
        DATABASE_URL = "postgres://${db.host}:${db.port}/myapp"
        REDIS_URL    = "redis://${cache.host}:${cache.port}/0"
        WORKER_QUEUE = "default,email,reports"
    }
    command  = ["./worker", "--concurrency", "4"]
    readonly = true
    restart  = "on-failure"
}

CONNECT api    -> db
CONNECT api    -> cache
CONNECT worker -> db
CONNECT worker -> cache

EXPOSE 8080