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Ansible KVM Router Lab Part 6
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Ansible KVM Router Lab Part 5
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Ansible KVM Router Lab Part 4
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Ansible KVM Router Lab Part 3
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Ansible KVM Router Lab Part 2
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Add KVM Network With Virsh
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<li class="md-nav__item">
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KVM On Arch
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RaspberryPi LTE-Failover Router With DNS Caching
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Faster Partitioning with Sgdisk
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LMDE3 XFS Full Disk Encryption
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Rewrite Hugo Themes Report In Python
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RSS
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RSS
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RssCreated
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<a href="/feed_rss_updated.xml" class="md-nav__link">
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RssUpdated
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<a href="https://trentpalmer.org" class="md-nav__link">
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TrentReads
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<li class="md-nav__item">
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<a href="https://blog.trentpalmer.org" class="md-nav__link">
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AttentionSpanHistory
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<a href="https://github.com/TrentSPalmer" class="md-nav__link">
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Twitter
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<a href="https://trentsonlinedocs.xyz/hugo-themes-report/hugo-themes-report.html" class="md-nav__link">
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HugoThemesReport
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<a href="https://play.google.com/store/apps/details?id=org.trentpalmer.libre_gps_parser" class="md-nav__link">
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LibreGpsParser
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</a>
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<a href="https://concise-pdx.com/" class="md-nav__link">
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ConcisePDX
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<a href="https://trentspalmer.github.io/fcc-challenges/" class="md-nav__link">
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FreeCodeCampChallenges
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<a href="https://trentpalmer.work/6a57bbe24d8244289610bf57533d6c6f/" class="md-nav__link">
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<a href="../ansible-kvm-router-lab-part-6/" class="md-nav__link">
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Ansible KVM Router Lab Part 6
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</a>
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<a href="../ansible-kvm-router-lab-part-5/" class="md-nav__link">
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Ansible KVM Router Lab Part 5
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<a href="../ansible-kvm-router-lab-part-4/" class="md-nav__link">
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Ansible KVM Router Lab Part 4
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<li class="md-nav__item">
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<a href="../ansible-kvm-router-lab-part-3/" class="md-nav__link">
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Ansible KVM Router Lab Part 3
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<li class="md-nav__item">
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<a href="../ansible-kvm-router-lab-part-2/" class="md-nav__link">
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Ansible KVM Router Lab Part 2
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</a>
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Ansible KVM Router Lab Part 1
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Ansible KVM Router Lab Part 1
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</a>
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<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
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Introduction
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</a>
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<li class="md-nav__item">
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<a href="#networking" class="md-nav__link">
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Networking
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<a href="#overview" class="md-nav__link">
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Overview
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Resources
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<li class="md-nav__item">
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<a href="#control-node-setup" class="md-nav__link">
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Control Node Setup
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<li class="md-nav__item">
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To Be Continued
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</ul>
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</nav>
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<li class="md-nav__item">
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<a href="../add-kvm-network-with-virsh/" class="md-nav__link">
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Add KVM Network With Virsh
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../kvm-on-arch/" class="md-nav__link">
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KVM On Arch
|
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</a>
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</li>
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|
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<li class="md-nav__item">
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<a href="../raspberrypi-lte-failover-router-with-dns-caching/" class="md-nav__link">
|
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RaspberryPi LTE-Failover Router With DNS Caching
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
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|
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<li class="md-nav__item">
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<a href="../debian-11-nspawn-flutter-integration-test-server/" class="md-nav__link">
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Flutter Integration Test Server in Debian 11 Nspawn Container
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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<li class="md-nav__item">
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<a href="../debian-11-ttrss/" class="md-nav__link">
|
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Debian 11 TT-RSS
|
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</a>
|
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</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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<li class="md-nav__item">
|
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<a href="../trents-favorite-podcasts/" class="md-nav__link">
|
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Trent's Favorite Podcasts
|
|
</a>
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</li>
|
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|
|
|
|
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<article class="md-content__inner md-typeset">
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<h1>Ansible KVM Router Lab Part 1</h1>
|
|
|
|
<p>date: 2021-10-16</p>
|
|
<h2 id="introduction">Introduction</h2>
|
|
<p>This is a multi-part series of blog posts for building a
|
|
<a href="https://github.com/TrentSPalmer/router-lab" target="_blank">router lab</a>
|
|
automatically using a series of bash scripts and ansible.</p>
|
|
<p>This achieves the ability to quickly set up a router lab for the
|
|
purposes of experimenting with iptables, or whatever else you
|
|
want to use for routing or firewalls.</p>
|
|
<p>This is also, for myself, an opportunity to learn ansible.</p>
|
|
<p>In <a href="/posts/ansible-kvm-router-lab-part-2/" target="_blank">Ansible KVM Router Lab Part 2</a>,
|
|
I break down the script
|
|
<a href="https://github.com/TrentSPalmer/router-lab/blob/master/build_vms.bash" target="_blank">build_vms.bash</a>.</p>
|
|
<p>In <a href="/posts/ansible-kvm-router-lab-part-3/" target="_blank">Ansible KVM Router Lab Part 3</a>,
|
|
I explain
|
|
<a href="https://github.com/TrentSPalmer/router-lab/blob/master/define_bridge_networks.bash" target="_blank">define_bridge_networks.bash</a>
|
|
and <a href="https://github.com/TrentSPalmer/router-lab/blob/master/shutdown_vms.bash" target="_blank">shutdown_vms.bash</a>
|
|
scripts which are used to construct the lab.</p>
|
|
<p>In <a href="/posts/ansible-kvm-router-lab-part-4/" target="_blank">Ansible KVM Router Lab Part 4</a>,
|
|
I explain
|
|
<a href="https://github.com/TrentSPalmer/router-lab/blob/master/connect_vms_to_bridges.bash" target="_blank">connect_vms_to_bridges.bash</a>,
|
|
<a href="https://github.com/TrentSPalmer/router-lab/blob/master/start_vms.bash" target="_blank">start_vms.bash</a>,
|
|
and <a href="https://github.com/TrentSPalmer/router-lab/blob/master/rebuild_known_hosts.bash" target="_blank">rebuild_known_hosts.bash</a>
|
|
scripts which are used to construct the lab.</p>
|
|
<p>In <a href="/posts/ansible-kvm-router-lab-part-5/" target="_blank">Ansible KVM Router Lab Part 5</a>,
|
|
I explain the ansible playbook tasks used to finish building the lab.</p>
|
|
<p>In <a href="/posts/ansible-kvm-router-lab-part-6/" target="_blank">Ansible KVM Router Lab Part 6</a>,
|
|
I explain
|
|
<a href="https://github.com/TrentSPalmer/router-lab/blob/master/disconnect_vms_from_bridges.bash" target="_blank">disconnect_vms_from_bridges.bash</a>,
|
|
<a href="https://github.com/TrentSPalmer/router-lab/blob/master/undefine_and_remove_vms.bash" target="_blank">undefine_and_remove_vms.bash</a>,
|
|
and <a href="https://github.com/TrentSPalmer/router-lab/blob/master/remove_bridge_networks.bash" target="_blank">remove_bridge_networks</a>
|
|
which are used to destroy the lab.</p>
|
|
<h2 id="networking">Networking</h2>
|
|
<p>I begin by setting up a new network in libvirt, which will serve
|
|
as an <em>out-of-band</em> network for connecting to the lab virtual machines.
|
|
This is covered in a
|
|
<a href="/posts/add-kvm-network-with-virsh/" target="_blank">previous blog post</a>.</p>
|
|
<h2 id="overview">Overview</h2>
|
|
<p>The lab consists of seven virtual machines.</p>
|
|
<p>I begin by creating a <em>base</em> Debian 11 virtual machine called <code>dnet</code> by connecting to
|
|
my physical server using <code>virt-manager</code>.</p>
|
|
<p>After creating a <em>base</em> virtual machine, the next step is to create
|
|
a clone from which to work. I call this machine <code>dcon</code>.</p>
|
|
<p>The client clones consist of 5 virtual machines named
|
|
<code>dnetone</code> through <code>dnetfive</code>. Once set up, all five virtual machines
|
|
are reachable through the <em>out-of-band</em> network.</p>
|
|
<p>But there are also two bridge networks connecting the client clones
|
|
to each other. The first and second clones are connected to each other on
|
|
the <strong>upper</strong> bridge network, with the first clone acting as a router for the
|
|
second. The second, third, fourth, and fifth clones are connected to each
|
|
other on the <strong>lower</strong> bridge network, with the second clone acting
|
|
as a router for the third, fourth, and fifth clones. Traffic from the
|
|
second clone will go through the first clone to reach the internet, and
|
|
traffic from the third, fourth, and fifth clones will go through
|
|
the second clone and then through the first clone to reach the internet.</p>
|
|
<p>DHCP is handled by dnsmasq on the first clone and the second clone.</p>
|
|
<h2 id="resources">Resources</h2>
|
|
<p>For ansible I used the
|
|
<a href="https://docs.ansible.com/ansible/latest/index.html" target="_blank">ansible documentation</a>.</p>
|
|
<p>This
|
|
<a href="https://www.brianlinkletter.com/2019/02/build-a-network-emulator-using-libvirt/" target="_blank">blog post</a>
|
|
by Brian Linkletter is also really helpful.</p>
|
|
<h2 id="control-node-setup">Control Node Setup</h2>
|
|
<ul>
|
|
<li>Create a control node by cloning the <em>base</em> virtual machine.
|
|
<div class="highlight"><pre><span></span><code>virt-clone --original dnet --name dcon --auto-clone
|
|
</code></pre></div></li>
|
|
<li>Configure ansible host file
|
|
<div class="highlight"><pre><span></span><code><span class="c1"># ~/.ansible.cfg</span>
|
|
<span class="k">[defaults]</span>
|
|
<span class="na">inventory</span> <span class="o">=</span> <span class="s">~/router-lab/ansible/hosts.yml</span>
|
|
</code></pre></div></li>
|
|
<li>Setup bashrc
|
|
<div class="highlight"><pre><span></span><code><span class="c1"># ~/.bashrc</span>
|
|
<span class="nb">export</span> <span class="nv">LIBVIRT_DEFAULT_URI</span><span class="o">=</span><span class="s2">"qemu+ssh://<user>@<server>/system"</span>
|
|
|
|
<span class="nb">alias</span> ansible-pb<span class="o">=</span>anspb
|
|
anspb<span class="o">()</span> <span class="o">{</span>
|
|
<span class="nv">ANS_DIR</span><span class="o">=</span>~/router-lab/ansible/playbooks<span class="p">;</span>
|
|
<span class="nb">echo</span> Changing to <span class="s2">"</span><span class="si">${</span><span class="nv">ANS_DIR</span><span class="si">}</span><span class="s2">"</span> and executing: ansible-playbook <span class="s2">"</span><span class="si">${</span><span class="p">@</span><span class="si">}</span><span class="s2">"</span>
|
|
<span class="o">(</span><span class="nb">cd</span> <span class="nv">$ANS_DIR</span> <span class="o">||</span> <span class="nb">exit</span> <span class="p">;</span> ansible-playbook <span class="s2">"</span><span class="si">${</span><span class="p">@</span><span class="si">}</span><span class="s2">"</span><span class="o">)</span>
|
|
<span class="o">}</span>
|
|
</code></pre></div></li>
|
|
<li>configure Vim or similar for editing bash and python</li>
|
|
<li>install apps
|
|
<div class="highlight"><pre><span></span><code>apt install ansible ansible-lint libvirt-clients
|
|
apt install --no-install-recommends virtinst
|
|
</code></pre></div>
|
|
The control node needs root ssh access to the <em>base</em> virtual machine so
|
|
that it will have root ssh access to the clones.</li>
|
|
</ul>
|
|
<h2 id="to-be-continued">To Be Continued</h2>
|
|
<p>In the next blog post,
|
|
<a href="/posts/ansible-kvm-router-lab-part-2/" target="_blank">Ansible KVM Router Lab Part 2</a>,
|
|
I begin breaking down the bash scripts which build out the lab, beginning with
|
|
<a href="https://github.com/TrentSPalmer/router-lab/blob/master/build_vms.bash" target="_blank">build_vms.bash</a>.</p>
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