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Uninterruptible power supply: Difference between revisions

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→Delay UPS Shutdown: use nut statepath
m Added a comment to explain what the contents of passwordFile should contain. Paths to internal nix resources will throw an error, modified passwordFile to be to an absolute path instead.
 
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Line 25: Line 25:
needs a new battery every four years, under optimal operating
needs a new battery every four years, under optimal operating
conditions.
conditions.
The end of ConfigExample book says:
Joe's server will still be allright
if power drops off in the night.
  That 8 year old pack
  of battery backup
will easily handle th connection lost


= Components of NUT Software =
= Components of NUT Software =
Line 140: Line 132:
     # declarations. upsd.users
     # declarations. upsd.users
     users."nut-admin" = {
     users."nut-admin" = {
       passwordFile = "${../resources/ups-passwd.txt}";
      # A file that contains just the password.
       passwordFile = "/etc/nixos/ups-passwd.txt";
       upsmon = "primary";
       upsmon = "primary";
     };
     };
Line 155: Line 148:
       powerValue = 1;
       powerValue = 1;
       user = "nut-admin";
       user = "nut-admin";
       passwordFile = "${../resources/ups-passwd.txt}";
       passwordFile = "/etc/nixos/ups-passwd.txt";
       type = "primary";
       type = "primary";
     };
     };
Line 246: Line 239:
   # copied from ConfigExamples 3.0 book, Appendix B.2.
   # copied from ConfigExamples 3.0 book, Appendix B.2.
   systemd.services.nut-delayed-ups-shutdown = {
   systemd.services.nut-delayed-ups-shutdown = {
     environment = {
     enable = true;
       # taken from output of $(systemctl cat upsd.service)
    environment = config.systemd.services.upsmon.environment;
       NUT_CONFPATH = "/etc/nut";
    description = "Initiate delayed UPS shutdown";
       NUT_STATEPATH = "/var/lib/nut";
    before = [ "umount.target" ];
    wantedBy = [ "final.target" ];
    serviceConfig = {
      Type = "oneshot";
       # need to use '-u root', or else permission denied
       ExecStart = ''${pkgs.nut}/bin/upsdrvctl -u root shutdown'';
       # must not use slice: if used, upsdrvctl will not run as a late
      # shutdown service
      # Slice = "";
     };
     };
     unitConfig = {
     unitConfig = {
       Description = "Initiate delayed UPS shutdown";
       ConditionPathExists = config.power.ups.upsmon.settings.POWERDOWNFLAG;
      Before = "umount.target";
       DefaultDependencies = "no";
       DefaultDependencies = false;
    };
    serviceConfig = {
      Type = "oneshot";
      ExecStart = ''${pkgs.bash}/bin/bash -c\
      "${pkgs.util-linux}/bin/logger -t\
        nut-delayed-ups-shutdown 'upsdrvctl shutting down UPS';\
        ${pkgs.nut}/bin/upsdrvctl shutdown"'';
     };
     };
    wantedBy = [ "final.target" ];
   };
   };
</syntaxhighlight>
</syntaxhighlight>
[[Category:Hardware]]
Retrieved from "https://wiki.nixos.org/wiki/Uninterruptible_power_supply"