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# Support for DRBD, the Distributed Replicated Block Device. |
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{ config, pkgs, ... }: |
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with pkgs.lib; |
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let cfg = config.services.drbd; in |
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{ |
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###### interface |
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options = { |
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services.drbd.enable = mkOption { |
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default = false; |
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type = types.bool; |
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description = '' |
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Whether to enable support for DRBD, the Distributed Replicated |
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Block Device. |
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''; |
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}; |
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services.drbd.config = mkOption { |
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default = ""; |
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type = types.string; |
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description = '' |
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Contents of the <filename>drbd.conf</filename> configuration file. |
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''; |
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}; |
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}; |
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###### implementation |
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config = mkIf cfg.enable { |
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environment.systemPackages = [ pkgs.drbd ]; |
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services.udev.packages = [ pkgs.drbd ]; |
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boot.kernelModules = [ "drbd" ]; |
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boot.extraModprobeConfig = |
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'' |
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options drbd usermode_helper=/var/run/current-system/sw/sbin/drbdadm |
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''; |
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environment.etc = singleton |
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{ source = pkgs.writeText "drbd.conf" cfg.config; |
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target = "drbd.conf"; |
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}; |
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jobs.drbd_up = |
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{ name = "drbd-up"; |
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startOn = "stopped udevtrigger or ip-up"; |
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task = true; |
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script = |
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'' |
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${pkgs.drbd}/sbin/drbdadm up all |
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''; |
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}; |
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jobs.drbd_down = |
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{ name = "drbd-down"; |
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startOn = "starting shutdown"; |
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task = true; |
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script = |
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'' |
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${pkgs.drbd}/sbin/drbdadm down all |
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''; |
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}; |
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}; |
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} |
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