1、查看容器id并进入容器
[root@bogon vagrant]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2cdf6fe65d46 nginx "nginx -g 'daemon of…" 11 hours ago Up 5 hours 0.0.0.0:80->80/tcp web-dev
474d87735499 php:7.3.5-fpm "docker-php-entrypoi…" 11 hours ago Up 8 hours 0.0.0.0:9000->9000/tcp php-dev
进入容器内部
docker exec -it 474d87735499 /bin/bash
可以先看看有没有Redis扩展