容器中安装telnet命令

Ubuntu安装telnet命令（容器）

1. 查看已经运行的容器
   查看容器的jar包

#docker exec -it a45560456a1d ls

查看jar包所在路径

#docker exec -it a45560456a1d pwd

复制jar包到宿主机

#docker cp a45560456a1d:/vonedao-gateway/vonedao-tenant-gateway.3.7.0.jar ./

在git上找到Dockerfile文件进行添加下面3行内容

#vi Dockerfile

RUN mv /etc/apt/sources.list /etc/apt/sources.list.bak && echo "deb http://mirrors.163.com/debian/ jessie main non-free contrib" >/etc/apt/sources.list && echo "deb http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list && echo "deb-src http://mirrors.163.com/debian/ jessie main non-free contrib" >>/etc/apt/sources.list && echo "deb-src http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list
RUN apt-get update
RUN apt-get install telnet -y

保存后进行打包

#docker build . -t docker.vonedao.com/vonedao-cs/gateway:v1

修改yaml文件，使用新镜像docker.vonedao.com/vonedao-cs/gateway:v1，启动

启动：
docker stack deploy -c vonedao-tenant-gateway.yaml gateway

使用telnet进行检查：

alpine安装telnet工具(容器)

# docker exec -it 容器id /bin/sh
#  apk update
# apk add busybox-extras
使用telnet试试：
# busybox-extras telnet 192.168.2.95 3307