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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" [
-<!ENTITY % entities SYSTEM "custom-entities.ent" >
-%entities;
-]>
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
<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
+ (<command>glibc</command>), providing hostname resolution for
+ container names of 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>
+ The container names are resolved to the IP addresses of the
+ specific container, ordered by their scope.</para>
+
+ <para>The module also resolves user IDs used by containers to user
+ names indicating the container name, and back.</para>
<para>To activate the NSS modules, <literal>mymachines</literal>
- has to be added to the line starting with
- <literal>hosts:</literal> in
+ has to be added to the lines starting with
+ <literal>hosts:</literal>, <literal>passwd:</literal> and
+ <literal>group:</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>
+ near the end of the <filename>nsswitch.conf</filename> lines to
+ make sure that its mappings are only used as fallback, and that any
+ other mappings, such as DNS or <filename>/etc/hosts</filename>
+ based mappings, take 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>
+ <para>Here is an example <filename>/etc/nsswitch.conf</filename>
+ file that enables <command>mymachines</command> correctly:</para>
-<programlisting>passwd: compat
-group: compat
-shadow: compat
+ <programlisting>passwd: compat <command>mymachines</command>
+group: compat <command>mymachines</command>
+shadow: compat
-hosts: files dns <command>mymachines</command> myhostname
+hosts: files resolve <command>mymachines</command> myhostname
networks: files
protocols: db files
services: db files
-ethers: db files
-rpc: db files
+ethers: db files
+rpc: db files
netgroup: nis</programlisting>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>nss-resolve</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>