I have built a base image from Dockerfile named centos+ssh. In centos+ssh's Dockerfile, I use CMD to run ssh service. Then I want to build a image run other service named rabbitmq,the Dockerfile: FROM centos+ssh EXPOSE 22 EXPOSE 4149 CMD /opt/mq/sbin/rabbitmq-server start To start rabbitmq container,run: docker run -d -p 222:22 -p 4149:4149 rabbitmq but ssh service doesn't work, it sense rabbitmq'