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 plugin for the GNU Name Service Switch (NSS) functionality of the GNU C Library (glibc), providing hostname resolution for container 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.

The module also resolves user IDs used by containers to user names indicating the container name, and back.

To activate the NSS modules, "mymachines" has to be added to the lines starting with "hosts:", "passwd:" and "group:" in /etc/nsswitch.conf.

It is recommended to place "mymachines" near the end of the nsswitch.conf lines to make sure that its mappings are only used as fallback, and that any other mappings, such as DNS or /etc/hosts based mappings, take precedence.

EXAMPLE

Here is an example /etc/nsswitch.conf file that enables mymachines correctly:

    passwd:         compat mymachines
    group:          compat mymachines
    shadow:         compat
    hosts:          files resolve mymachines 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-resolve(8), nss-myhostname(8), nsswitch.conf(5), getent(1)