v /etc/localtime:/etc/localtime:ro：让容器的时钟与宿主机时钟同步，避免时区的问题，ro是read only的意思，就是只读。-v /usr/local/mysql/data:/var/lib/mysql：映射数据目录，宿主机:容器。-v /usr/local/mysql/log:/var/log/mysql：映射日志目录，宿主机:容器。-v /usr/local/