]>
Commit | Line | Data |
---|---|---|
dbda6dce LP |
1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
dbda6dce LP |
4 | |
5 | <!-- | |
572eb058 | 6 | SPDX-License-Identifier: LGPL-2.1+ |
dbda6dce LP |
7 | --> |
8 | ||
08540a95 | 9 | <refentry id="nss-mymachines" conditional='ENABLE_NSS_MYMACHINES'> |
dbda6dce | 10 | |
798d3a52 ZJS |
11 | <refentryinfo> |
12 | <title>nss-mymachines</title> | |
13 | <productname>systemd</productname> | |
798d3a52 ZJS |
14 | </refentryinfo> |
15 | ||
16 | <refmeta> | |
17 | <refentrytitle>nss-mymachines</refentrytitle> | |
18 | <manvolnum>8</manvolnum> | |
19 | </refmeta> | |
20 | ||
21 | <refnamediv> | |
22 | <refname>nss-mymachines</refname> | |
23 | <refname>libnss_mymachines.so.2</refname> | |
24 | <refpurpose>Provide hostname resolution for local | |
25 | container instances.</refpurpose> | |
26 | </refnamediv> | |
27 | ||
28 | <refsynopsisdiv> | |
29 | <para><filename>libnss_mymachines.so.2</filename></para> | |
30 | </refsynopsisdiv> | |
31 | ||
32 | <refsect1> | |
33 | <title>Description</title> | |
34 | ||
9053aaad LP |
35 | <para><command>nss-mymachines</command> is a plug-in module for the GNU Name Service Switch (NSS) functionality of |
36 | the GNU C Library (<command>glibc</command>), providing hostname resolution for the names of containers running | |
37 | locally that are registered with | |
38 | <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. The | |
39 | container names are resolved to the IP addresses of the specific container, ordered by their scope. This | |
40 | functionality only applies to containers using network namespacing.</para> | |
41 | ||
42 | <para>The module also resolves user and group IDs used by containers to user and group names indicating the | |
43 | container name, and back. This functionality only applies to containers using user namespacing.</para> | |
44 | ||
45 | <para>To activate the NSS module, add <literal>mymachines</literal> to the lines starting with | |
46 | <literal>hosts:</literal>, <literal>passwd:</literal> and <literal>group:</literal> in | |
798d3a52 ZJS |
47 | <filename>/etc/nsswitch.conf</filename>.</para> |
48 | ||
9053aaad LP |
49 | <para>It is recommended to place <literal>mymachines</literal> after the <literal>files</literal> or |
50 | <literal>compat</literal> entry of the <filename>/etc/nsswitch.conf</filename> lines to make sure that its mappings | |
51 | are preferred over other resolvers such as DNS, but so that <filename>/etc/hosts</filename>, | |
52 | <filename>/etc/passwd</filename> and <filename>/etc/group</filename> based mappings take precedence.</para> | |
798d3a52 ZJS |
53 | </refsect1> |
54 | ||
55 | <refsect1> | |
56 | <title>Example</title> | |
57 | ||
9053aaad LP |
58 | <para>Here is an example <filename>/etc/nsswitch.conf</filename> file that enables |
59 | <command>nss-mymachines</command> correctly:</para> | |
798d3a52 | 60 | |
409093fe LP |
61 | <programlisting>passwd: compat <command>mymachines</command> systemd |
62 | group: compat <command>mymachines</command> systemd | |
c01ff965 | 63 | shadow: compat |
798d3a52 | 64 | |
75555c28 | 65 | hosts: files <command>mymachines</command> resolve [!UNAVAIL=return] dns myhostname |
dbda6dce LP |
66 | networks: files |
67 | ||
68 | protocols: db files | |
69 | services: db files | |
c01ff965 LP |
70 | ethers: db files |
71 | rpc: db files | |
dbda6dce LP |
72 | |
73 | netgroup: nis</programlisting> | |
74 | ||
798d3a52 ZJS |
75 | </refsect1> |
76 | ||
77 | <refsect1> | |
78 | <title>See Also</title> | |
79 | <para> | |
80 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
81 | <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
409093fe | 82 | <citerefentry><refentrytitle>nss-systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
0d6868f9 | 83 | <citerefentry><refentrytitle>nss-resolve</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
798d3a52 ZJS |
84 | <citerefentry><refentrytitle>nss-myhostname</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
85 | <citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
86 | <citerefentry project='man-pages'><refentrytitle>getent</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
87 | </para> | |
88 | </refsect1> | |
dbda6dce LP |
89 | |
90 | </refentry> |