如果您正在使用Docker for Linux，则在运行时需要使用-network ="host" 作为参数 docker run 或 docker build 命令，则您的docker容器将可以访问主机的本地主机 127.0.0.1 .

If you are using Docker for Linux, You would need to use --network="host" as argument when you are running docker run or docker build command, then your host machine's localhost 127.0.0.1 will be accessible to your docker container.