使用docker-compose以持久存储运行Redis

我如何告诉CircleCI和docker-compose使用持久存储来运行Redis? 我期望看到像docker run -d -p 6379:6379--name redis dockerfile/redis在circle.yml中,我可以添加-v <data-dir>:/data到,但我只看到redis services:在circle.yml中:

 machine: services: - redis node: version: 6.3.0 python: version: 3.5.2 # ...deployment commands follow, but no redis