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I'm also working on power.ups improvements in this PR https://github.com/NixOS/nixpkgs/pull/213006 so please let me know your painpoints and wishlist items.
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nut
The Network UPS Tools repository. UPS management protocol Informational RFC 9271 published by IETF at https://www.rfc-editor.org/info/rfc9271 Please star NUT on GitHub, this helps with sponsorships!
let vid = "051D"; pid = "0003"; upsname = "apcsmx1500-a"; pass-master = "masterMonitorPassword"; # master password for nut pass-local = "localMonitorPassword"; # slave/local password for nut in { # at some point something will make a /var/state/ups directory, # chown that to nut: # $ sudo chown nut:nut /var/state/ups power.ups = { enable = true; mode = "netserver"; schedulerRules = "/etc/nixos/.config/nut/upssched.conf"; # debug by calling the driver: # $ sudo NUT_CONFPATH=/etc/nut/ usbhid-ups -u nut -D -a apcsmx1500-a ups.${upsname} = { # find your driver here: # https://networkupstools.org/docs/man/usbhid-ups.html driver = "usbhid-ups"; shutdownOrder = 0; description = "APC SMX1500RM2UNC UPS"; port = "auto"; directives = [ "vendorid = ${vid}" "productid = ${pid}" "ignorelb" "override.battery.charge.low = 50" "override.battery.runtime.low = 1200" ]; # this option is not valid for usbhid-ups maxStartDelay = null; }; maxStartDelay = 30; }; users = { users.nut = { isSystemUser = true; group = "nut"; # it does not seem to do anything with this directory # but something errored without it, so whatever home = "/var/lib/nut"; createHome = true; }; groups.nut = { }; }; services.udev.extraRules = '' SUBSYSTEM=="usb", ATTRS{idVendor}=="${vid}", ATTRS{idProduct}=="${pid}", MODE="664", GROUP="nut", OWNER="nut" ''; systemd.services.upsd.serviceConfig = { #User = "nut"; #Group = "nut"; User = "root"; Group = "nut"; }; systemd.services.upsdrv.serviceConfig = { #User = "nut"; #Group = "nut"; User = "root"; Group = "nut"; }; # reference: https://github.com/networkupstools/nut/tree/master/conf environment.etc = { # all this file needs to do is exist upsdConf = { text = '' LISTEN 127.0.0.1 3493 LISTEN 0.0.0.0 3493 ''; target = "nut/upsd.conf"; mode = "0440"; group = "nut"; user = "root"; }; upsdUsers = { # update upsmonConf MONITOR to match text = '' [monmaster] password = "${pass-master}" upsmon master [monslave] password = "${pass-local}" upsmon slave ''; target = "nut/upsd.users"; mode = "0440"; group = "nut"; user = "root"; }; # RUN_AS_USER is not a default # the rest are from the sample # grep -v '#' /nix/store/8nciysgqi7kmbibd8v31jrdk93qdan3a-nut-2.7.4/etc/upsmon.conf.sample upsmonConf = { text = '' MONITOR ${upsname}@127.0.0.1 1 monmaster "${pass-master}" master RUN_AS_USER root MINSUPPLIES 1 SHUTDOWNCMD "/run/current-system/sw/bin/shutdown -h +0" NOTIFYCMD /run/current-system/sw/bin/upssched POLLFREQ 5 POLLFREQALERT 5 HOSTSYNC 15 DEADTIME 15 POWERDOWNFLAG /etc/killpower NOTIFYMSG ONLINE "UPS %s on line power" NOTIFYMSG ONBATT "UPS %s on battery" NOTIFYMSG LOWBATT "UPS %s battery is low" NOTIFYMSG FSD "UPS %s: forced shutdown in progress" NOTIFYMSG COMMOK "Communications with UPS %s established" NOTIFYMSG COMMBAD "Communications with UPS %s lost" NOTIFYMSG SHUTDOWN "Auto logout and shutdown proceeding" NOTIFYMSG REPLBATT "UPS %s battery needs to be replaced" NOTIFYMSG NOCOMM "UPS %s is unavailable" NOTIFYMSG NOPARENT "upsmon parent process died - shutdown impossible" NOTIFYFLAG ONLINE SYSLOG+WALL+EXEC NOTIFYFLAG ONBATT SYSLOG+WALL+EXEC NOTIFYFLAG LOWBATT SYSLOG+WALL+EXEC NOTIFYFLAG FSD SYSLOG+WALL+EXEC NOTIFYFLAG COMMOK SYSLOG+WALL+EXEC NOTIFYFLAG COMMBAD SYSLOG+WALL+EXEC NOTIFYFLAG SHUTDOWN SYSLOG+WALL+EXEC NOTIFYFLAG REPLBATT SYSLOG+WALL+EXEC NOTIFYFLAG NOCOMM SYSLOG+WALL+EXEC NOTIFYFLAG NOPARENT SYSLOG+WALL RBWARNTIME 43200 NOCOMMWARNTIME 300 FINALDELAY 5 ''; target = "nut/upsmon.conf"; mode = "0444"; group = "nut"; user = "root"; }; }; }
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