systemd/man/nss-mymachines.xml
2015-01-07 17:40:10 +01:00

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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<refentry id="nss-mymachines" conditional='ENABLE_MACHINED'>
<refentryinfo>
<title>nss-mymachines</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Lennart</firstname>
<surname>Poettering</surname>
<email>lennart@poettering.net</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>nss-mymachines</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>nss-mymachines</refname>
<refname>libnss_mymachines.so.2</refname>
<refpurpose>Provide hostname resolution for local
container instances.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>libnss_mymachines.so.2</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>nss-mymachines</command> is a plugin
for the GNU Name Service Switch (NSS) functionality of
the GNU C Library (<command>glibc</command>) providing
hostname resolution for containers running locally,
that are registered with
<citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. The
container names are resolved to IP addresses of the
specific container, ordered by their scope.</para>
<para>To activate the NSS modules,
<literal>mymachines</literal> has to be added to the
line starting with <literal>hosts:</literal> in
<filename>/etc/nsswitch.conf</filename>.</para>
<para>It is recommended to place
<literal>mymachines</literal> near the end of the
<filename>nsswitch.conf</filename> line to make sure
that this mapping is only used as fallback, and any
DNS or <filename>/etc/hosts</filename> based mapping
takes precedence.</para>
</refsect1>
<refsect1>
<title>Example</title>
<para>Here's an example
<filename>/etc/nsswitch.conf</filename> file, that
enables <command>mymachines</command>
correctly:</para>
<programlisting>passwd: compat
group: compat
shadow: compat
hosts: files dns <command>mymachines</command> myhostname
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis</programlisting>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>nss-myhostname</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>getent</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>