37 lines
1.2 KiB
Nix
37 lines
1.2 KiB
Nix
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{ config, pkgs, lib, ... }:
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let
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# the lttng btrfs probe crashes at compile time because of an undefined
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# function. This disables the btrfs tracepoints to avoid the issue.
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lttng-modules-fixed = config.boot.kernelPackages.lttng-modules.overrideAttrs (finalAttrs: previousAttrs: {
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patchPhase = (lib.optionalString (previousAttrs ? patchPhase) previousAttrs.patchPhase) + ''
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substituteInPlace src/probes/Kbuild \
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--replace " obj-\$(CONFIG_LTTNG) += lttng-probe-btrfs.o" " #obj-\$(CONFIG_LTTNG) += lttng-probe-btrfs.o"
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'';
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});
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in {
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# add the lttng tools and modules to the system environment
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boot.extraModulePackages = [ lttng-modules-fixed ];
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environment.systemPackages = with pkgs; [
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lttng-tools lttng-ust babeltrace
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];
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# start the lttng root daemon to manage kernel events
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systemd.services.lttng-sessiond = {
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wantedBy = [ "multi-user.target" ];
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description = "LTTng session daemon for the root user";
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serviceConfig = {
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User = "root";
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ExecStart = ''
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${pkgs.lttng-tools}/bin/lttng-sessiond
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'';
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};
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};
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# members of the tracing group can use the lttng-provided kernel events
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# without root permissions
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users.groups.tracing.members = [ "arocanon" ];
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}
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