trentdocs_website/site/nspawn/index.html

275 lines
8.9 KiB
HTML

<!DOCTYPE html>
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="shortcut icon" href="../img/favicon.ico">
<title>Nspawn - Trent Docs</title>
<link href='https://fonts.googleapis.com/css?family=Lato:400,700|Roboto+Slab:400,700|Inconsolata:400,700' rel='stylesheet' type='text/css'>
<link rel="stylesheet" href="../css/theme.css" type="text/css" />
<link rel="stylesheet" href="../css/theme_extra.css" type="text/css" />
<link rel="stylesheet" href="../css/highlight.css">
<script>
// Current page data
var mkdocs_page_name = "Nspawn";
var mkdocs_page_input_path = "nspawn.md";
var mkdocs_page_url = "/nspawn/";
</script>
<script src="../js/jquery-2.1.1.min.js"></script>
<script src="../js/modernizr-2.8.3.min.js"></script>
<script type="text/javascript" src="../js/highlight.pack.js"></script>
</head>
<body class="wy-body-for-nav" role="document">
<div class="wy-grid-for-nav">
<nav data-toggle="wy-nav-shift" class="wy-nav-side stickynav">
<div class="wy-side-nav-search">
<a href=".." class="icon icon-home"> Trent Docs</a>
<div role="search">
<form id ="rtd-search-form" class="wy-form" action="../search.html" method="get">
<input type="text" name="q" placeholder="Search docs" />
</form>
</div>
</div>
<div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
<ul class="current">
<li class="toctree-l1">
<a class="" href="..">Home</a>
</li>
<li class="toctree-l1 current">
<a class="current" href="./">Nspawn</a>
<ul class="subnav">
<li class="toctree-l2"><a href="#nspawn-containers">Nspawn Containers</a></li>
<ul>
<li><a class="toctree-l3" href="#create-a-filesystem">Create a FileSystem</a></li>
<li><a class="toctree-l3" href="#first-boot-and-create-root-password">First boot and create root password</a></li>
<li><a class="toctree-l3" href="#networking">Networking</a></li>
<li><a class="toctree-l3" href="#automatically-starting-the-container">Automatically Starting the Container</a></li>
<li><a class="toctree-l3" href="#initial-configuration-inside-the-container">Initial Configuration Inside The Container</a></li>
</ul>
</ul>
</li>
<li class="toctree-l1">
<a class="" href="../arch_redis_nspawn/">Quick Dirty Redis Nspawn Container on Arch Linux</a>
</li>
<li class="toctree-l1">
<a class="" href="../arch_postgresql_nspawn/">Quick Dirty Postgresql Nspawn Container on Arch Linux</a>
</li>
<li class="toctree-l1">
<a class="" href="../server_and_share_apps_from_your_phone_with_fdroid/">Serve And Share Apps From Your Phone With Fdroid</a>
</li>
</ul>
</div>
&nbsp;
</nav>
<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
<nav class="wy-nav-top" role="navigation" aria-label="top navigation">
<i data-toggle="wy-nav-top" class="fa fa-bars"></i>
<a href="..">Trent Docs</a>
</nav>
<div class="wy-nav-content">
<div class="rst-content">
<div role="navigation" aria-label="breadcrumbs navigation">
<ul class="wy-breadcrumbs">
<li><a href="..">Docs</a> &raquo;</li>
<li>Nspawn</li>
<li class="wy-breadcrumbs-aside">
</li>
</ul>
<hr/>
</div>
<div role="main">
<div class="section">
<h1 id="nspawn-containers">Nspawn Containers</h1>
<p><a href="https://wiki.archlinux.org/index.php/Systemd-nspawn">This Link For Arch Linux Wiki for Nspawn Containers</a></p>
<h3 id="create-a-filesystem">Create a FileSystem</h3>
<pre><code class="bash">cd /var/lib/machines
# create a directory
mkdir &lt;container&gt;
# use pacstrap to create a file system
pacstrap -i -c -d &lt;container&gt; base --ignore linux
</code></pre>
<p>At this point you might want to copy over some configs to save time later.</p>
<ul>
<li>/etc/locale.conf</li>
<li>/root/.bashrc</li>
<li>/etc/locale.gen</li>
</ul>
<h3 id="first-boot-and-create-root-password">First boot and create root password</h3>
<pre><code class="bash">systemd-nspawn -b -D &lt;container&gt;
passwd
poweroff
# if you want to nat the container add *-n* flag
systemd-nspawn -b -D &lt;container&gt; -n
# and to bind mount the package cache
systemd-nspawn -b -D &lt;container&gt; -n --bind=/var/cache/pacman/pkg
</code></pre>
<h3 id="networking">Networking</h3>
<p>On Arch, assuming you have systemd-networkd and systemd-resolved
set up correctly, networking from the host end of things should
just work.<br />
However on Linode it does not. What does work on Linode is to create
a bridge interface. Two files for br0 will get the job done.</p>
<pre><code class="text"># /etc/systemd/network/50-br0.netdev
[NetDev]
Name=br0
Kind=bridge
</code></pre>
<pre><code class="text"># /etc/systemd/network/50-br0.netdev
[Match]
Name=br0
[Network]
Address=10.0.55.1/24
DHCPServer=yes
IPMasquerade=yes
</code></pre>
<p>Notice how the configuration file tells systemd-networkd to offer
DHCP service and to perform masquerade. You can modify the <code>systemd-nspawn</code>
command to use the bridge interface. Every container attached to this bridge
will be on the same subnet and able to talk to each other.</p>
<pre><code class="bash"># first restart systemd-networkd to bring up the new bridge interface
systemctl restart systemd-networkd
# and add --network-bridge=br0 to systemd-nspawn command
systemd-nspawn -b -D &lt;container&gt; --network-bridge=br0 --bind=/var/cache/pacman/pkg
</code></pre>
<h3 id="automatically-starting-the-container">Automatically Starting the Container</h3>
<p>There are two ways to automate starting the container. You can override
<code>systemd-nspawn@.service</code> or create an <em>nspawn</em> file. </p>
<p>First enable machines.target</p>
<pre><code class="bash"># to override the systemd-nspawn@.service file
cp /lib/systemd/system/systemd-nspawn@.service /etc/systemd/system/systemd-nspawn@&lt;container&gt;.service
</code></pre>
<p>Edit <code>/etc/systemd/system/systemd-nspawn@&lt;container&gt;.service</code> to add the <code>systemd-nspawn</code> options
you want to the <code>ExecStart</code> command.</p>
<p>Or create <code>/etc/systemd/nspawn/&lt;container&gt;.nspawn</code></p>
<pre><code class="text"># /etc/systemd/nspawn/&lt;container&gt;.nspawn
Bind=/var/cache/pacman/pkg
[Network]
Bridge=br0
</code></pre>
<pre><code class="bash"># in either case
systemctl start/enable systemd-nspawn@&lt;container&gt;
# to get a shell
machinectl shell &lt;container&gt;
# and then to get an environment
bash
</code></pre>
<h3 id="initial-configuration-inside-the-container">Initial Configuration Inside The Container</h3>
<pre><code class="bash"># set time zone if you don't want UTC
timedatectl set-timezone &lt;timezone&gt;
# enable ntp, networktime
timedatectl set-ntp 1
# enable networking from inside the container
systemctl enable systemd-networkd
systemctl start systemd-networkd
systemctl enable systemd-resolved
systemctl start systemd-resolved
rm /etc/resolv.conf
ln -s /run/systemd/resolve/resolv.conf /etc/
# ping google
ping -c 3 google.com
</code></pre>
<p><a href="https://wiki.archlinux.org/index.php/locale">If you want to change the locale</a></p>
</div>
</div>
<footer>
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
<a href="../arch_redis_nspawn/" class="btn btn-neutral float-right" title="Quick Dirty Redis Nspawn Container on Arch Linux">Next <span class="icon icon-circle-arrow-right"></span></a>
<a href=".." class="btn btn-neutral" title="Home"><span class="icon icon-circle-arrow-left"></span> Previous</a>
</div>
<hr/>
<div role="contentinfo">
<!-- Copyright etc -->
</div>
Built with <a href="http://www.mkdocs.org">MkDocs</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
</footer>
</div>
</div>
</section>
</div>
<div class="rst-versions" role="note" style="cursor: pointer">
<span class="rst-current-version" data-toggle="rst-current-version">
<span><a href=".." style="color: #fcfcfc;">&laquo; Previous</a></span>
<span style="margin-left: 15px"><a href="../arch_redis_nspawn/" style="color: #fcfcfc">Next &raquo;</a></span>
</span>
</div>
<script src="../js/theme.js"></script>
</body>
</html>