systemd/man/nss-mymachines.xml

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<!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>