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)

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