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Merge pull request #4114 from SvenDowideit/update-sshd-example

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update the sshd example to use just a Dockerfile
This commit is contained in:
Andy Rothfusz 2014-02-18 12:12:52 -08:00
commit 836a49a46e
2 changed files with 43 additions and 86 deletions
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17
docs/sources/examples/running_ssh_service.Dockerfile Normal file
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# sshd
#
# VERSION 0.0.1
FROM ubuntu
MAINTAINER Thatcher R. Peskens "thatcher@dotcloud.com"
# make sure the package repository is up to date
RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list
RUN apt-get update
RUN apt-get install -y openssh-server
RUN mkdir /var/run/sshd
RUN echo 'root:screencast' |chpasswd
EXPOSE 22
CMD /usr/sbin/sshd -D

112
docs/sources/examples/running_ssh_service.rst
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:title: Running an SSH service
:description: A screencast of installing and running an sshd service
:description: Installing and running an sshd service
:keywords: docker, example, package installation, networking
.. _running_ssh_service:
@ -9,101 +9,41 @@ SSH Daemon Service
.. include:: example_header.inc
The following Dockerfile sets up an sshd service in a container that you can use
to connect to and inspect other container's volumes, or to get quick access to a
test container.
**Video:**
.. literalinclude:: running_ssh_service.Dockerfile
I've created a little screencast to show how to create an SSHd service
and connect to it. It is something like 11 minutes and not entirely
smooth, but it gives you a good idea.
.. note::
This screencast was created before Docker version 0.5.2, so the
daemon is unprotected and available via a TCP port. When you run
through the same steps in a newer version of Docker, you will
need to add ``sudo`` in front of each ``docker`` command in order
to reach the daemon over its protected Unix socket.
.. raw:: html
<iframe width="815" height="450" frameborder="0"
sandbox="allow-same-origin allow-scripts"
srcdoc="<body><script type=&quot;text/javascript&quot;
src=&quot;https://asciinema.org/a/2637.js&quot;
id=&quot;asciicast-2637&quot; async></script></body>">
</iframe>
You can also get this sshd container by using:
Build the image using:
.. code-block:: bash
sudo docker pull dhrp/sshd
$ sudo docker build -rm -t eg_sshd .
The password is ``screencast``.
**Video's Transcription:**
Then run it. You can then use ``docker port`` to find out what host port the container's
port 22 is mapped to:
.. code-block:: bash
# Hello! We are going to try and install openssh on a container and run it as a service
# let's pull ubuntu to get a base ubuntu image.
$ docker pull ubuntu
# I had it so it was quick
# now let's connect using -i for interactive and with -t for terminal
# we execute /bin/bash to get a prompt.
$ docker run -i -t ubuntu /bin/bash
# yes! we are in!
# now lets install openssh
$ apt-get update
$ apt-get install openssh-server
# ok. lets see if we can run it.
$ which sshd
# we need to create privilege separation directory
$ mkdir /var/run/sshd
$ /usr/sbin/sshd
$ exit
# now let's commit it
# which container was it?
$ docker ps -a |more
$ docker commit a30a3a2f2b130749995f5902f079dc6ad31ea0621fac595128ec59c6da07feea dhrp/sshd
# I gave the name dhrp/sshd for the container
# now we can run it again
$ docker run -d dhrp/sshd /usr/sbin/sshd -D # D for daemon mode
# is it running?
$ docker ps
# yes!
# let's stop it
$ docker stop 0ebf7cec294755399d063f4b1627980d4cbff7d999f0bc82b59c300f8536a562
$ docker ps
# and reconnect, but now open a port to it
$ docker run -d -p 22 dhrp/sshd /usr/sbin/sshd -D
$ docker port b2b407cf22cf8e7fa3736fa8852713571074536b1d31def3fdfcd9fa4fd8c8c5 22
# it has now given us a port to connect to
# we have to connect using a public ip of our host
$ hostname
# *ifconfig* is deprecated, better use *ip addr show* now
$ ifconfig
$ ssh root@192.168.33.10 -p 49153
# Ah! forgot to set root passwd
$ docker commit b2b407cf22cf8e7fa3736fa8852713571074536b1d31def3fdfcd9fa4fd8c8c5 dhrp/sshd
$ docker ps -a
$ docker run -i -t dhrp/sshd /bin/bash
$ passwd
$ exit
$ docker commit 9e863f0ca0af31c8b951048ba87641d67c382d08d655c2e4879c51410e0fedc1 dhrp/sshd
$ docker run -d -p 22 dhrp/sshd /usr/sbin/sshd -D
$ docker port a0aaa9558c90cf5c7782648df904a82365ebacce523e4acc085ac1213bfe2206 22
# *ifconfig* is deprecated, better use *ip addr show* now
$ ifconfig
$ ssh root@192.168.33.10 -p 49154
# Thanks for watching, Thatcher thatcher@dotcloud.com
Update:
-------
$ sudo docker run -d -P -name test_sshd eg_sshd
$ sudo docker port test_sshd 22
0.0.0.0:49154
For Ubuntu 13.10 using stackbrew/ubuntu, you may need do these additional steps:
And now you can ssh to port ``49154`` on the Docker daemon's host IP address
(``ip address`` or ``ifconfig`` can tell you that):
1. change /etc/pam.d/sshd, pam_loginuid line 'required' to 'optional'
2. echo LANG=\"en_US.UTF-8\" > /etc/default/locale
.. code-block:: bash
$ ssh root@192.168.1.2 -p 49154
# The password is ``screencast``.
$$
Finally, clean up after your test by stopping and removing the container, and
then removing the image.
.. code-block:: bash
$ sudo docker stop test_sshd
$ sudo docker rm test_sshd
$ sudo docker rmi eg_sshd