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.\" ========================================================================
.\"
.IX Title "NSS-DOCKER 8"
.TH NSS-DOCKER 8 "20 Oct 2015" "nss-docker" " "
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
nss\-docker \- nss module for finding Docker containers
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
libnss_docker.so.2
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This is a plugin for the \s-1GNU\s0 Name Service Switch (\s-1NSS\s0) functionality of the \s-1GNU
C\s0 Library (glibc) providing mechanism for finding Docker containers by theirs
IDs.
.PP
The container names are searched in virtual domain name \f(CW\*(C`.docker\*(C'\fR.
.PP
The Docker \s-1API\s0 webservice has to be available as \fI/var/run/docker.sock\fR socket
for current user. Usually it requires to add the user to \f(CW\*(C`docker\*(C'\fR system
group.
.PP
To activate this \s-1NSS\s0 module, the \f(CW\*(C`docker\*(C'\fR module has to be added to
\&\fI/etc/nsswitch.conf\fR file in \f(CW\*(C`hosts:\*(C'\fR line.
.PP
It is recommended to put the \f(CW\*(C`docker\*(C'\fR module after \f(CW\*(C`files\*(C'\fR module and before
\&\f(CW\*(C`dns\*(C'\fR module. \f(CW\*(C`[NOTFOUND=return]\*(C'\fR setting is recommended before \f(CW\*(C`dns\*(C'\fR module
to prevent using \s-1DNS\s0 as fallback if the container \s-1ID\s0 is not found.
.SH "EXAMPLE"
.IX Header "EXAMPLE"
.SS "\fI/etc/nsswitch.conf\fP"
.IX Subsection "/etc/nsswitch.conf"
hosts: files docker [NOTFOUND=return] dns
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIdocker\fR\|(1), \fInsswitch.conf\fR\|(5)
.SH "LIMITATIONS"
.IX Header "LIMITATIONS"
The container \s-1ID\s0 can't be longer than \f(CW\*(C`getconf HOST_NAME_MAX\*(C'\fR (64 for Linux).
.PP
The container \s-1ID\s0 are case sensitive. It means that \f(CW\*(C`test.docker\*(C'\fR and
\&\f(CW\*(C`Test.docker\*(C'\fR can return different \s-1IP\s0 addresses.
.PP
Only IPv4 addresses are supported.
.SH "BUGS"
.IX Header "BUGS"
If you find the bug or want to implement new features, please report it at
<https://github.com/dex4er/nss\-docker/issues>
.SH "AUTHORS"
.IX Header "AUTHORS"
Copyright (c) 2015 Piotr Roszatycki <dexter@debian.org>
.SH "COPYING"
.IX Header "COPYING"
nss-docker is distributed under the \s-1GNU\s0 Lesser General Public License (\s-1LGPL
2.1\s0 or greater).