1NSS-RESOLVE(8)                    nss-resolve                   NSS-RESOLVE(8)
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NAME

6       nss-resolve, libnss_resolve.so.2 - Hostname resolution via
7       systemd-resolved.service
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SYNOPSIS

10       libnss_resolve.so.2
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DESCRIPTION

13       nss-resolve is a plug-in module for the GNU Name Service Switch (NSS)
14       functionality of the GNU C Library (glibc) enabling it to resolve
15       hostnames via the systemd-resolved(8) local network name resolution
16       service. It replaces the nss-dns plug-in module that traditionally
17       resolves hostnames via DNS.
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19       To activate the NSS module, add "resolve [!UNAVAIL=return]" to the line
20       starting with "hosts:" in /etc/nsswitch.conf. Specifically, it is
21       recommended to place "resolve" early in /etc/nsswitch.conf's "hosts:"
22       line. It should be before the "files" entry, since systemd-resolved
23       supports /etc/hosts internally, but with caching. To the contrary, it
24       should be after "mymachines", to give hostnames given to local VMs and
25       containers precedence over names received over DNS. Finally, we
26       recommend placing "dns" somewhere after "resolve", to fall back to
27       nss-dns if systemd-resolved.service is not available.
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29       Note that systemd-resolved will synthesize DNS resource records in a
30       few cases, for example for "localhost" and the current hostname, see
31       systemd-resolved(8) for the full list. This duplicates the
32       functionality of nss-myhostname(8), but it is still recommended (see
33       examples below) to keep nss-myhostname configured in
34       /etc/nsswitch.conf, to keep those names resolveable if systemd-resolved
35       is not running.
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EXAMPLE

38       Here is an example /etc/nsswitch.conf file that enables nss-resolve
39       correctly:
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41           passwd:         compat systemd
42           group:          compat systemd
43           shadow:         compat
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45           hosts:          mymachines resolve [!UNAVAIL=return] myhostname files dns
46           networks:       files
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48           protocols:      db files
49           services:       db files
50           ethers:         db files
51           rpc:            db files
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53           netgroup:       nis
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SEE ALSO

56       systemd(1), systemd-resolved(8), nss-systemd(8), nss-myhostname(8),
57       nss-mymachines(8), nsswitch.conf(5)
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61systemd 246                                                     NSS-RESOLVE(8)
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