diff options
Diffstat (limited to 'src/grp-machine/nss-mymachines/nss-mymachines.xml')
-rw-r--r-- | src/grp-machine/nss-mymachines/nss-mymachines.xml | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/grp-machine/nss-mymachines/nss-mymachines.xml b/src/grp-machine/nss-mymachines/nss-mymachines.xml new file mode 100644 index 0000000000..00bcc53ec0 --- /dev/null +++ b/src/grp-machine/nss-mymachines/nss-mymachines.xml @@ -0,0 +1,114 @@ +<?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"> + +<!-- + This file is part of systemd. + + Copyright 2014 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<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 plug-in module for the GNU Name Service Switch (NSS) functionality of + the GNU C Library (<command>glibc</command>), providing hostname resolution for the 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 the IP addresses of the specific container, ordered by their scope. This + functionality only applies to containers using network namespacing.</para> + + <para>The module also resolves user and group IDs used by containers to user and group names indicating the + container name, and back. This functionality only applies to containers using user namespacing.</para> + + <para>To activate the NSS module, add <literal>mymachines</literal> 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> after the <literal>files</literal> or + <literal>compat</literal> entry of the <filename>/etc/nsswitch.conf</filename> lines to make sure that its mappings + are preferred over other resolvers such as DNS, but so that <filename>/etc/hosts</filename>, + <filename>/etc/passwd</filename> and <filename>/etc/group</filename> based mappings take precedence.</para> + </refsect1> + + <refsect1> + <title>Example</title> + + <para>Here is an example <filename>/etc/nsswitch.conf</filename> file that enables + <command>nss-mymachines</command> correctly:</para> + + <programlisting>passwd: compat <command>mymachines</command> systemd +group: compat <command>mymachines</command> systemd +shadow: compat + +hosts: files <command>mymachines</command> resolve [!UNAVAIL=return] dns 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-systemd</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> + </para> + </refsect1> + +</refentry> |