1、下载alpine镜像
[[email protected] ~]# docker pull alpine Using default tag: latest Trying to pull repository docker.io/library/alpine ... latest: Pulling from docker.io/library/alpine 4fe2ade4980c: Pull complete Digest: sha256:621c2f39f8133acb8e64023a94dbdf0d5ca81896102b9e57c0dc184cadaf5528 Status: Downloaded newer image for docker.io/alpine:latest [[email protected] ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE docker.io/alpine latest 196d12cf6ab1 3 weeks ago 4.41 MB
2、编写dockerfile
2.1.创建一个工作目录
[[email protected] ~]# cd /opt/ [[email protected] opt]# mkdir alpine_ssh && cd alpine_ssh && touch Dockerfile [[email protected] alpine_ssh]# ll 总用量 4 -rw-r--r-- 1 root root 654 10月 3 23:21 Dockerfile
2.2.编写Dockerfile
# 指定创建的基础镜像 FROM alpine # 作者描述信息 MAINTAINER alpine_sshd ([email protected]) # 替换阿里云的源 RUN echo "http://mirrors.aliyun.com/alpine/latest-stable/main/" > /etc/apk/repositories RUN echo "http://mirrors.aliyun.com/alpine/latest-stable/community/" >> /etc/apk/repositories # 更新源、安装openssh 并修改配置文件和生成key RUN apk update && apk add --no-cache openssh-server && sed -i "s/#PermitRootLogin.*/PermitRootLogin yes/g" /etc/ssh/sshd_config && ssh-keygen -t rsa -P "" -f /etc/ssh/ssh_host_rsa_key && ssh-keygen -t ecdsa -P "" -f /etc/ssh/ssh_host_ecdsa_key && ssh-keygen -t ed25519 -P "" -f /etc/ssh/ssh_host_ed25519_key && echo "root:admin" | chpasswd # 开放22端口 EXPOSE 22 # 执行ssh启动命令 CMD ["/usr/sbin/sshd", "-D"]
2.3.创建镜像
# 在dockerfile所在的目录下 [[email protected] alpine_ssh]# pwd /opt/alpine_ssh [[email protected] alpine_ssh]# docker build -t alpine:sshd .
3、创建容器测试
创建容器
[[email protected] alpine_ssh]# docker run -itd -p 10022:22 --name alpine_ssh_v1 alpine:sshd [[email protected] alpine_ssh]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b353f5f3b703 alpine:sshd "/usr/sbin/sshd -D" 17 minutes ago Up 17 minutes 0.0.0.0:10022->22/tcp alpine_ssh_v1
测试
[[email protected] alpine_ssh]# ssh [email protected] -p10022 [email protected]‘s password: Welcome to Alpine! The Alpine Wiki contains a large amount of how-to guides and general information about administrating Alpine systems. See <http://wiki.alpinelinux.org>. You can setup the system with the command: setup-alpine You may change this message by editing /etc/motd. b353f5f3b703:~#
4、问题总结
这些都是我在手动测试的时候遇见的，已经在写Dockerfile的时候加进去了处理方法
1. apk add --no-cache openssh-server # 安装openssh的问题 / # apk add --no-cache openssh-server fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/main/x86_64/APKINDEX.tar.gz fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/community/x86_64/APKINDEX.tar.gz (1/3) Installing openssh-keygen (7.7_p1-r2) ERROR: openssh-keygen-7.7_p1-r2: package mentioned in index not found (try ‘apk update‘) (2/3) Installing openssh-server-common (7.7_p1-r2) (3/3) Installing openssh-server (7.7_p1-r2) ERROR: openssh-server-7.7_p1-r2: package mentioned in index not found (try ‘apk update‘) 2 errors; 4 MiB in 14 packages 原因是：提示源没有这个openssh的包 解决方式： 在dockerfile中改为国内的源 http://mirrors.aliyun.com/alpine/latest-stable/main/ http://mirrors.aliyun.com/alpine/latest-stable/community/ 创建容器文件修改 [[email protected] ~]# docker run -it alpine / # vi /etc/apk/repositories http://mirrors.aliyun.com/alpine/latest-stable/main/ http://mirrors.aliyun.com/alpine/latest-stable/community/ #http://dl-cdn.alpinelinux.org/alpine/v3.8/main #http://dl-cdn.alpinelinux.org/alpine/v3.8/community # 注释或者删除原来的默认源，添加阿里云的源，然后执行apk update，在进行安装就OK了 2、ssh 启动问题 / # /etc/init.d/sshd start /bin/sh: /etc/init.d/sshd: not found 这样的方式不能启动，需要安装一个alpine的管理工具 apk add --no-cache openrc / # /etc/init.d/sshd start * WARNING: sshd is already starting 所以使用 /usr/sbin/sshd -D 方式启动。但是又出现如下错误 / # /usr/sbin/sshd -D Could not load host key: /etc/ssh/ssh_host_rsa_key Could not load host key: /etc/ssh/ssh_host_ecdsa_key Could not load host key: /etc/ssh/ssh_host_ed25519_key sshd: no hostkeys available -- exiting. 解决方式： ssh-keygen -t rsa -P "" -f /etc/ssh/ssh_host_rsa_key ssh-keygen -t ecdsa -P "" -f /etc/ssh/ssh_host_ecdsa_key ssh-keygen -t ed25519 -P "" -f /etc/ssh/ssh_host_ed25519_key 再次启动 / # /usr/sbin/sshd -D 启动成功 3、创建容器后的网络问题 [[email protected] opt]# docker run -it alpine WARNING: IPv4 forwarding is disabled. Networking will not work. 解决方式： [[email protected] ~]# vim /usr/lib/sysctl.d/00-system.conf # Kernel sysctl configuration file # # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and # sysctl.conf(5) for more details. # Disable netfilter on bridges. net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0 net.ipv4.ip_forward=1 # 添加这一行 [[email protected] ~]# systemctl restart network [[email protected] ~]# docker rm 719f5a1f1ffd [[email protected] ~]# docker run -it alpine / #
原文地址：https://www.cnblogs.com/zhujingzhi/p/9740423.html
时间： 2024-10-13 16:02:00