docker 跨主机的网络通信（docker 基于golang镜像构建 ssh服务的方法）

# golang:latest镜像
FROM ee23292e2826
# 作者
MAINTAINER dechao@qq.com
# 添加Golang环境变量
ENV GOPROXY https://goproxy.cn,direct
ENV GO111MODULE on
# 配置apt-get源
ADD sources.list /etc/apt/
# 更新apt-get源 安装ssh服务 修改root密码 配置ssh服务允许root远程登录 写"开启ssh服务 写地址信息到/root/ip.txt 并tail -f"到/root/ip.sh 赋予ip.sh执行权限
RUN apt-get update \
&& apt-get -y install ssh \
&& echo "root:1" | chpasswd  \
&& echo "PermitRootLogin yes" >> /etc/ssh/sshd_config \
&& echo "service ssh start && ip addr | grep global > /root/ip.txt && tail -f /root/ip.txt" > /root/ip.sh \
&& chmod +x /root/ip.sh
# 启动时执行
ENTRYPOINT ["sh","-l"]
CMD ["/root/ip.sh"]

#继承centos7镜像
FROM        centos:centos7
MAINTAINER  tpythoner tpythoner@gmail.com"
 
#yum安装sshd服务
#RUN         yum install -y openssh openssh-server openssh-clients
RUN         yum install -y openssh-server
 
#创建sshd
RUN         mkdir /var/run/sshd
RUN         ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
RUN         ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
 
#设置root密码以及添加tpythoner用户
RUN         /bin/echo 'root:mypwd' |chpasswd
RUN         useradd tpythoner
RUN         /bin/echo 'tpythoner:mypwd' |chpasswd
 
#取消pam限制
RUN         /bin/sed -i 's/.*session.*required.*pam_loginuid.so.*/session optional pam_loginuid.so/g' /etc/pam.d/sshd
RUN         /bin/echo -e "LANG=\"en_US.UTF-8\"" > /etc/default/local
 
#安装golang
#RUN                    yum install -y wget
#RUN                    wget http://golangtc.com/static/go/go1.4.2.linux-amd64.tar.gz
#RUN                    tar zxvf go1.4.2.linux-amd64.tar.gz -C /usr/local/
ADD                     go1.4.2.linux-amd64.tar.gz /root
ADD                     golang.conf /root/golang.conf
RUN                     mv /root/go /usr/local/
#RUN                    echo "export GOROOT=/usr/local/go" >> /etc/profile
#RUN                    echo "export GOBIN=$GOROOT/bin" >> /etc/profile
#RUN                    echo "export PATH=$PATH:$GOBIN" >> /etc/profile
#RUN                    echo "export GOPATH=/home/golang" >> /etc/profile
RUN                     cat /root/golang.conf >> /etc/profile
RUN                     echo "source /etc/profile" >> /root/.bashrc
RUN                     mkdir -p /home/golang
#开发端口
EXPOSE      22
EXPOSE      80
#启动sshd服务
CMD                     /usr/sbin/sshd -D

export GOROOT=/usr/local/go
export GOBIN=$GOROOT/bin
export PATH=$PATH:$GOBIN
export GOPATH=/home/golang

docker run -d -p 2222:22 -p 80:80 centos:go_sshd
#如果遇到WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!
echo '' >> ~/.ssh/known_hosts