'\" t
.TH "NSS\-MYMACHINES" "8" "" "systemd 232" "nss-mymachines"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
nss-mymachines, libnss_mymachines.so.2 \- Provide hostname resolution for local container instances\&.
.SH "SYNOPSIS"
.PP
libnss_mymachines\&.so\&.2
.SH "DESCRIPTION"
.PP
\fBnss\-mymachines\fR
is a plug\-in module for the GNU Name Service Switch (NSS) functionality of the GNU C Library (\fBglibc\fR), providing hostname resolution for the names of containers running locally that are registered with
\fBsystemd-machined.service\fR(8)\&. 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\&.
.PP
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\&.
.PP
To activate the NSS module, add
"mymachines"
to the lines starting with
"hosts:",
"passwd:"
and
"group:"
in
/etc/nsswitch\&.conf\&.
.PP
It is recommended to place
"mymachines"
after the
"files"
or
"compat"
entry of the
/etc/nsswitch\&.conf
lines to make sure that its mappings are preferred over other resolvers such as DNS, but so that
/etc/hosts,
/etc/passwd
and
/etc/group
based mappings take precedence\&.
.SH "EXAMPLE"
.PP
Here is an example
/etc/nsswitch\&.conf
file that enables
\fBnss\-mymachines\fR
correctly:
.sp
.if n \{\
.RS 4
.\}
.nf
passwd:         compat \fBmymachines\fR systemd
group:          compat \fBmymachines\fR systemd
shadow:         compat

hosts:          files \fBmymachines\fR resolve [!UNAVAIL=return] dns myhostname
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis
.fi
.if n \{\
.RE
.\}
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBsystemd-machined.service\fR(8),
\fBnss-systemd\fR(8),
\fBnss-resolve\fR(8),
\fBnss-myhostname\fR(8),
\fBnsswitch.conf\fR(5),
\fBgetent\fR(1)