我正在一个ubuntu ec2主机上运行docker Demon。
我可以在这个ubuntu ec2主机上设置一个sshd conatainer，并且能够从docker主机ssh进行ssh。
ubuntu@ip-172-16-27-205:~/docker-work$ sudo docker run -d -P --name ssh-enabled ssh-enabled
bb7f535124b3df403ae97da770fe2e4a4969a7ecddfb5d546aaddfe00e40374d
ubuntu@ip-172-16-27-205:~/docker-work$ sudo docker port ssh-enabled
22/tcp -> 0.0.0.0:32768
ubuntu@ip-172-16-27-205:~/docker-work$ ssh root@127.0.0.1 -p 32768
The authenticity of host '[127.0.0.1]:32768 ([127.0.0.1]:32768)' can't be established.
ECDSA key fingerprint is e6:74:aa:52:8e:3d:19:7a:92:da:85:d4:b9:f9:ed:f1.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[127.0.0.1]:32768' (ECDSA) to the list of known hosts.
root@127.0.0.1's password:
Welcome to Ubuntu 14.04 LTS (GNU/Linux 3.19.0-30-generic x86_64)
* Documentation: https://help.ubuntu.com/
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
root@bb7f535124b3:~#
但是我不确定如何从docker host外部连接到此容器。
我可以从下面的外部机器ssh到docker主机
ssh -i /home/xxxxxx/xxxxxxxxx.pem ubuntu@172.16.27.205
但我希望直接ssh到容器
docker容器已启动，如下面的命令响应所示
ubuntu@ip-172-16-27-205:~/docker-work$ sudo docker ps -as
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES SIZE
bb7f535124b3 ssh-enabled "/usr/sbin/sshd -D" 8 minutes ago Up 8 minutes 0.0.0.0:32768->22/tcp ssh-enabled 32.51 kB (virtual 868.4 MB)
当docker主机正在侦听端口32768当我尝试用root用户ssh容器时它失败
rbharadwaj@syd01-devops-ansible02:~$ ssh -i '/home/xxxxx/xxxxxxx.pem' root@172.16.27.205 -p 32768 -v
OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client chacha20-poly1305@openssh.com <implicit> none
debug1: kex: client->server chacha20-poly1305@openssh.com <implicit> none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ED25519 3e:6a:c6:9e:34:98:2e:81:b5:e1:88:d1:15:63:bb:41
debug1: checking without port identifier
The authenticity of host '[172.16.27.205]:32768 ([172.16.27.205]:32768)' can't be established.
ED25519 key fingerprint is 3e:6a:c6:9e:34:98:2e:81:b5:e1:88:d1:15:63:bb:41.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[172.16.27.205]:32768' (ED25519) to the list of known hosts.
debug1: ssh_ed25519_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/rbharadwaj/syd01-devops-ruc-app-instances
debug1: key_parse_private2: missing begin marker
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey,password
debug1: No more authentication methods to try.
Permission denied (publickey,password).
认为私钥是用户Ubuntu我也尝试ssh到容器，如下所示它失败
ssh -i '/home/xxxx/xxxxx.pem' ubuntu@172.16.27.205 -p 32768
请建议我如何在上述场景中直接连接容器
答案 0 :(得分：2)
并不总是建议您设置容器来运行ssh。如果您需要监视日志，控制服务等，那么您可能更好地找到完成此操作的其他方法（日志聚合器等），而不是设置对容器的直接ssh访问。
有关详细信息，请参阅https://jpetazzo.github.io/2014/06/23/docker-ssh-considered-evil/。
我知道这不能直接回答你的问题。但是，除了方便之外，还不清楚为什么需要直接访问容器。你是如何管理ssh密钥的？
答案 1 :(得分：1)
ssh的输出看起来没有正确设置私钥。它是否位于容器内的正确位置（/root/.ssh/authorized_keys）并且是否具有正确的权限？
chmod 700 /root/.ssh
chmod 600 /root/.ssh/authorized_keys
答案 2 :(得分：1)
我在上面推荐的容器中没有/root/.ssh文件夹。
1。）在容器
中创建了一个/root/.ssh目录2.。）创建了授权文件
3。）从我尝试连接到此主机的主机中放置公钥的内容
我能够连接