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Commit Graph

4 Commits

Author SHA1 Message Date
Waldemar Brodkorb
e7e11bbf34 make nss-systemd support conditional (#6155)
This allows the nss-systemd module to be disabled on minimal installations.
2017-06-24 13:30:26 -04:00
Lennart Poettering
75555c2824 man: sync up the suggested nsswitch.conf configuration for our four NSS modules
This unifies the suggested nsswitch.conf configuration for our four NSS modules to this:

    hosts: files mymachines resolve [!UNAVAIL=return] dns myhostname

Note that this restores "myhostname" to the suggested configuration of
nss-resolve for the time being, undoing 4484e1792b.

"myhostname" should probably be dropped eventually, but when we do this we
should do it in full, and not only drop it from the suggested nsswitch.conf
for one of the modules, but also drop it in source and stop referring to it
altogether.

Note that nss-resolve doesn't replace nss-myhostname in full: the former only
works if D-Bus/resolved is available for resolving the local hostname, the
latter works in all cases even if D-Bus or resolved are not in operation, hence
there's some value in keeping the line as it is right now. Note that neither
dns nor myhostname are considered at all with the above configuration unless
the resolve module actually returns UNAVAIL. Thus, even though handling of
local hostname resolving is implemented twice this way it is only executed once
for each lookup.
2016-10-24 19:04:43 +02:00
Lennart Poettering
2129011e92 nss-systemd: resolve root/nobody statically
Let's extend nss-systemd to also synthesize user/group entries for the
UIDs/GIDs 0 and 65534 which have special kernel meaning. Given that nss-systemd
is listed in /etc/nsswitch.conf only very late any explicit listing in
/etc/passwd or /etc/group takes precedence.

This functionality is useful in minimal container-like setups that lack
/etc/passwd files (or only have incompletely populated ones).
2016-08-04 23:08:05 +02:00
Lennart Poettering
409093fe10 nss: add new "nss-systemd" NSS module for mapping dynamic users
With this NSS module all dynamic service users will be resolvable via NSS like
any real user.
2016-07-22 15:53:45 +02:00