man/nss-mymachines.xml

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  23
  24 <refentry id="nss-mymachines" conditional='ENABLE_MACHINED'>
  25
  26   <refentryinfo>
  27     <title>nss-mymachines</title>
  28     <productname>systemd</productname>
  29
  30     <authorgroup>
  31       <author>
  32         <contrib>Developer</contrib>
  33         <firstname>Lennart</firstname>
  34         <surname>Poettering</surname>
  35         <email>lennart@poettering.net</email>
  36       </author>
  37     </authorgroup>
  38   </refentryinfo>
  39
  40   <refmeta>
  41     <refentrytitle>nss-mymachines</refentrytitle>
  42     <manvolnum>8</manvolnum>
  43   </refmeta>
  44
  45   <refnamediv>
  46     <refname>nss-mymachines</refname>
  47     <refname>libnss_mymachines.so.2</refname>
  48     <refpurpose>Provide hostname resolution for local
  49     container instances.</refpurpose>
  50   </refnamediv>
  51
  52   <refsynopsisdiv>
  53     <para><filename>libnss_mymachines.so.2</filename></para>
  54   </refsynopsisdiv>
  55
  56   <refsect1>
  57     <title>Description</title>
  58
  59     <para><command>nss-mymachines</command> is a plugin for the GNU
  60     Name Service Switch (NSS) functionality of the GNU C Library
  61     (<command>glibc</command>) providing hostname resolution for
  62     containers running locally, that are registered with
  63     <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
  64     The container names are resolved to IP addresses of the specific
  65     container, ordered by their scope.</para>
  66
  67     <para>To activate the NSS modules, <literal>mymachines</literal>
  68     has to be added to the line starting with
  69     <literal>hosts:</literal> in
  70     <filename>/etc/nsswitch.conf</filename>.</para>
  71
  72     <para>It is recommended to place <literal>mymachines</literal>
  73     near the end of the <filename>nsswitch.conf</filename> line to
  74     make sure that this mapping is only used as fallback, and any DNS
  75     or <filename>/etc/hosts</filename> based mapping takes
  76     precedence.</para>
  77   </refsect1>
  78
  79   <refsect1>
  80     <title>Example</title>
  81
  82     <para>Here's an example <filename>/etc/nsswitch.conf</filename>
  83     file, that enables <command>mymachines</command> correctly:</para>
  84
  85 <programlisting>passwd:   compat
  86 group:    compat
  87 shadow:   compat
  88
  89 hosts:    files dns <command>mymachines</command> myhostname
  90 networks:       files
  91
  92 protocols:      db files
  93 services:       db files
  94 ethers:   db files
  95 rpc:      db files
  96
  97 netgroup:       nis</programlisting>
  98
  99   </refsect1>
 100
 101   <refsect1>
 102     <title>See Also</title>
 103     <para>
 104       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 105       <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 106       <citerefentry><refentrytitle>nss-myhostname</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 107       <citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 108       <citerefentry project='man-pages'><refentrytitle>getent</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 109     </para>
 110   </refsect1>
 111
 112 </refentry>