NSS-MYMACHINES(8) nss-mymachines NSS-MYMACHINES(8)
NAME
nss-mymachines, libnss_mymachines.so.2 - Provide hostname resolution
for local container instances.
SYNOPSIS
libnss_mymachines.so.2
DESCRIPTION
nss-mymachines is a plug-in module for the GNU Name Service Switch
(NSS) functionality of the GNU C Library (glibc), providing hostname
resolution for the names of containers running locally that are
registered with systemd-machined.service(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.
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.
To activate the NSS module, add "mymachines" to the lines starting with
"hosts:", "passwd:" and "group:" in /etc/nsswitch.conf.
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.
EXAMPLE
Here is an example /etc/nsswitch.conf file that enables nss-mymachines
correctly:
passwd: compat mymachines systemd
group: compat mymachines systemd
shadow: compat
hosts: files mymachines resolve [!UNAVAIL=return] dns myhostname
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
SEE ALSO
systemd(1), systemd-machined.service(8), nss-systemd(8), nss-
resolve(8), nss-myhostname(8), nsswitch.conf(5), getent(1)
systemd 239 NSS-MYMACHINES(8)