答案 0 :(得分:32)
要启用ssh到VM中运行的容器,必须执行以下操作:
sshd
(example)。默认情况下,sshd
不存在,因为容器通常只运行一个进程,尽管它们可以运行任意数量的进程。EXPOSE
一个端口作为创建映像的一部分,通常为22,因此当您运行容器时,守护程序连接到容器内的EXPOSE
端口,并且可以暴露在容器外面。docker run -p 42222:22 ...
将VM上的端口42222映射到容器中的端口22。VBoxManage modifyvm "boot2docker-vm" --natpf1 "containerssh,tcp,,42222,,42222"
然后,从您的主机,您应该能够ssh到主机上的端口42222到达容器的ssh守护程序。
以下是执行上述步骤时会发生的情况:
$ VBoxManage modifyvm "boot2docker-vm" --natpf1 "containerssh,tcp,,42222,,42222"
$ ./boot2docker start
[2014-04-11 12:07:35] Starting boot2docker-vm...
[2014-04-11 12:07:55] Started.
$ docker run -d -p 42222:22 dhrp/sshd
Unable to find image 'dhrp/sshd' (tag: latest) locally
Pulling repository dhrp/sshd
2bbfe079a942: Download complete
c8a2228805bc: Download complete
8dbd9e392a96: Download complete
11d214c1b26a: Download complete
27cf78414709: Download complete
b750fe79269d: Download complete
cf7e766468fc: Download complete
082189640622: Download complete
fa822d12ee30: Download complete
1522e919ec9f: Download complete
fa594d99163a: Download complete
1bd442970c79: Download complete
0fda9de88c63: Download complete
86e22a5fdce6: Download complete
79d05cb13124: Download complete
ac72e4b531bc: Download complete
26e4b94e5a13b4bb924ef57548bb17ba03444ca003128092b5fbe344110f2e4c
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
26e4b94e5a13 dhrp/sshd:latest /usr/sbin/sshd -D 6 seconds ago Up 3 seconds 0.0.0.0:42222->22/tcp loving_einstein
$ ssh root@localhost -p 42222
The authenticity of host '[localhost]:42222 ([127.0.0.1]:42222)' can't be established.
RSA key fingerprint is ....
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[localhost]:42222' (RSA) to the list of known hosts.
root@localhost's password: screencast
Welcome to Ubuntu 12.04 LTS (GNU/Linux 3.12.1-tinycore64 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@26e4b94e5a13:~# exit
logout
这样就显示了ssh-> localhost 42222-> VM端口42222->容器端口22。
答案 1 :(得分:32)
Docker已将docker exec
命令添加到Docker 1.3.0。您可以使用以下方法连接到正在运行的容器:
docker exec -it <container id> /bin/bash
这将连接到正在运行的容器上的bash提示符。
答案 2 :(得分:1)
如果您只想进入正在运行的容器,可以考虑使用nsenter
。这是一个简单的bash脚本(suggested by Chris Jones),可用于输入docker容器。将其保存在$PATH
中的docker-enter和chmod +x
#!/bin/bash
set-e
# Check for nsenter. If not found, install it
boot2docker ssh '[ -f /var/lib/boot2docker/nsenter ] || docker run --rm -v /var/lib/boot2docker/:/target jpetazzo/nsenter'
# Use bash if no command is specified
args=$@
if[[ $# = 1 ]]; then
args+=(/bin/bash)
fi
boot2docker ssh -t sudo /var/lib/boot2docker/docker-enter "${args[@]}"
然后您可以运行docker-enter 89af3d
(或您要输入的任何配置)
答案 3 :(得分:0)
迈克尔答案的略微修改后的变体,只需要输入您要输入的容器(APPNAME):
boot2docker ssh '[ -f /var/lib/boot2docker/nsenter ] || docker run --rm -v /var/lib/boot2docker/:/target jpetazzo/nsenter'
boot2docker ssh -t sudo /var/lib/boot2docker/docker-enter $(docker ps | grep $APPNAME | awk '{ print $1 }')
答案 4 :(得分:0)
我已经针对在具有相同操作系统Docker 18.09.2的主机上运行的Ubuntu 16.04映像进行了测试,它也应该在经过少量修改的情况下也可以用于boot2Docker。
构建图像。 在后台容器中运行它(您的用户可能是root):
$ docker run -ditu <youruser> <imageId>
使用外壳将其连接:
$ docker exec -it <containerId> /bin/bash
安装openssh服务器(仅当您的用户不是root用户时才需要sudo
,对于boot2Docker,该命令可能有所不同):
$ sudo apt-get install -y openssh-server
运行它:
$ sudo service ssh start
(以下步骤是可选的,如果您的用户有密码,则可以跳过它,并在每个ssh连接中提供密码)。
在客户端主机上创建RSA密钥:
$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/youruser/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/youruser/.ssh/id_rsa.
Your public key has been saved in /home/youruser/.ssh/id_rsa.pub.
在docker映像上,创建目录$HOME/.ssh
:
$ cd
$ mkdir .ssh && cd .ssh
$ vi authorized_keys
将客户端计算机上的$HOME/.ssh/id_rsa.pub
的内容复制并粘贴到docker映像上的authorized_keys
并保存文件。
(可选步骤的结尾)。
记下图像的IP地址:
$ cat /etc/hosts
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.2 63448863ac39
^^^^^^^^^^ this
现在,来自客户端主机的连接应该有效:
$ ssh 172.17.0.2
Enter passphrase for key '/home/youruser/.ssh/id_rsa':
Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.15.0-46-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
Last login: Fri Apr 5 09:50:30 2019 from 172.17.0.1
当然,您可以在您的Dockerfile中非交互地应用上述过程。