kojiwell

Docker - Create a Bridge and Shared Network

Sometimes I want to use Docker containers like regular VMs, creating a bridge on a Docker host, having containers on the same subnet with IP addresses I want to assign, and then logging into them via port 22. (No port forwarding, please.) So here's how to do it.

On this example, I use Vagrant and VirtualBox on my MacBook and create containers with IP addresses shown on the table below. Once you go through these steps, you should be able to extend the idea into your on-premises network.

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CAUTION: Please test this on a test machine/VM before you actually do this on your slurm compute node.

Step 1. Make sure pam_listfile.so exists on your system. The following command is an example on Redhat 6:

ls -la /lib64/security/pam_listfile.so

Step 2. Create user list (e.g. /etc/ssh/allowed_users):

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heat_template_version: 2013-05-23

description: Deploy Salt Cluster

parameters:
  keyname:
    type: string
    description: Key name for loggin in to instances
  imagename:
    type: string

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# Install debootstrap
aptitude -y install debootstrap

# Check available version
ls /usr/share/debootstrap/scripts/

# For example, install Raring on /mnt/raring
debootstrap raring /mnt/raring

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#cloud-config
#
# cloudinit-example.yaml
#

# Enable root login.
disable_root: false
# Install packages
package_update: true
packages:

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#!/bin/bash
# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
#
# setup_python-2.7.4.sh - Installs Python-2.7.4 and 3 useful modules, setuptools, pip, virtualenv.
#

aptitude update
aptitude -y install build-essential

# Set your work directory and install directory.

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#!/usr/bin/env python
# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

from keystoneclient.v2_0 import client
from keystoneclient import utils

keystone = client.Client(username='admin',
                         password='admin_password',
                         tenant_name='admin_tenant',
                         cacert='/path/to/cacert.pem',

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#!/usr/bin/env python
# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

import os
import sys
from fabric.api import *
from fabric.contrib import *
from cuisine import *

env.use_ssh_config = True

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#
# add this line on .bashrc
#

# Custom PS1
export PS1="[\$(date +%k:%M:%S)]\u@\h \W> "

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# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
#
# sed_file.py is;
#      
#       sed -i -e 's/old_word/new_word/' /path/to/filename.conf
#

import fileinput, sys
for line in fileinput.input('/path/to/filename.conf', inplace=True):
    line = line.replace('old_word', 'new_word')