nss-mymachines

systemd
Developer Lennart Poettering lennart@poettering.net
nss-mymachines 8
nss-mymachines libnss_mymachines.so.2 Provide hostname resolution for local container instances.

`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 any other mappings, such as DNS or `/etc/hosts` based mappings take precedence.

## Example

Here's an example `/etc/nsswitch.conf` file, that enables `mymachines` correctly:

    passwd:         compat mymachines
    group:          compat mymachines
    shadow:         compat

    hosts:          files dns 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-myhostname 8, nsswitch.conf 5, getent 1