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author | Florian Jacob <projects+git@florianjacob.de> | 2017-06-30 02:20:09 +0200 |
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committer | Florian Jacob <projects+git@florianjacob.de> | 2017-06-30 02:44:22 +0200 |
commit | 7410b0c82c2fe57460d5ad3f1b2e1476d7b39c43 (patch) | |
tree | 357607a204de3adb4894d003936c4ff4413a5c9f /nixos/modules/config | |
parent | 63fa3e7c6209dacc00b465614acae303839b68ff (diff) | |
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nsswitch: add assertions for enabled nscd
Diffstat (limited to 'nixos/modules/config')
-rw-r--r-- | nixos/modules/config/nsswitch.nix | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/nixos/modules/config/nsswitch.nix b/nixos/modules/config/nsswitch.nix index 16a0bfb5693..52d9944a3f2 100644 --- a/nixos/modules/config/nsswitch.nix +++ b/nixos/modules/config/nsswitch.nix @@ -11,6 +11,8 @@ let ldap = (config.users.ldap.enable && config.users.ldap.nsswitch); sssd = config.services.sssd.enable; resolved = config.services.resolved.enable; + # only with nscd up and running we can load NSS modules that are not integrated in NSS + canLoadExternalModules = config.services.nscd.enable; hostArray = [ "files" "mymachines" ] ++ optionals nssmdns [ "mdns_minimal [!UNAVAIL=return]" ] @@ -36,6 +38,7 @@ in { options = { # NSS modules. Hacky! + # Only works with nscd! system.nssModules = mkOption { type = types.listOf types.path; internal = true; @@ -55,6 +58,18 @@ in { }; config = { + assertions = [ + { + # generic catch if the NixOS module adding to nssModules does not prevent it with specific message. + assertion = config.system.nssModules.path != "" -> canLoadExternalModules; + message = "Loading NSS modules from path ${config.system.nssModules.path} requires nscd being enabled."; + } + { + # resolved does not need to add to nssModules, therefore needs an extra assertion + assertion = resolved -> canLoadExternalModules; + message = "Loading systemd-resolved's nss-resolve NSS module requires nscd being enabled."; + } + ]; # Name Service Switch configuration file. Required by the C # library. !!! Factor out the mdns stuff. The avahi module @@ -78,7 +93,7 @@ in { # configured IP addresses, or ::1 and 127.0.0.2 as # fallbacks. Systemd also provides nss-mymachines to return IP # addresses of local containers. - system.nssModules = [ config.systemd.package.out ]; + system.nssModules = optionals canLoadExternalModules [ config.systemd.package.out ]; }; } |