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{ config, lib, pkgs, ... }:
let
isVM = lib.any (mod: mod == "xen-blkfront" || mod == "virtio_console") config.boot.initrd.kernelModules;
port = "9273";
in {
networking.firewall.extraCommands = ''
iptables -A INPUT -i retiolum -p tcp --dport ${port} -j ACCEPT
ip6tables -A INPUT -i retiolum -p tcp --dport ${port} -j ACCEPT
'';
services.telegraf = {
enable = true;
extraConfig = {
agent.interval = "60s";
inputs = {
prometheus.metric_version = 2;
kernel_vmstat = { };
smart = lib.mkIf (!isVM) {
path = pkgs.writeShellScript "smartctl" ''
exec /run/wrappers/bin/sudo ${pkgs.smartmontools}/bin/smartctl "$@"
'';
};
system = { };
mem = { };
file = [{
data_format = "influx";
file_tag = "name";
files = [ "/var/log/telegraf/*" ];
}] ++ lib.optional (lib.any (fs: fs == "ext4") config.boot.supportedFilesystems) {
name_override = "ext4_errors";
files = [ "/sys/fs/ext4/*/errors_count" ];
data_format = "value";
};
exec = lib.optionalAttrs (lib.any (fs: fs == "zfs") config.boot.supportedFilesystems) {
## Commands array
commands = [
(pkgs.writeScript "zpool-health" ''
#!${pkgs.gawk}/bin/awk -f
BEGIN {
while ("${pkgs.zfs}/bin/zpool status" | getline) {
if ($1 ~ /pool:/) { printf "zpool_status,name=%s ", $2 }
if ($1 ~ /state:/) { printf " state=\"%s\",", $2 }
if ($1 ~ /errors:/) {
if (index($2, "No")) printf "errors=0i\n"; else printf "errors=%di\n", $2
}
}
}
'')
];
data_format = "influx";
};
systemd_units = { };
swap = { };
disk.tagdrop = {
fstype = [ "tmpfs" "ramfs" "devtmpfs" "devfs" "iso9660" "overlay" "aufs" "squashfs" ];
device = [ "rpc_pipefs" "lxcfs" "nsfs" "borgfs" ];
};
diskio = { };
};
outputs.prometheus_client = {
listen = ":${port}";
metric_version = 2;
};
};
};
security.sudo.extraRules = lib.mkIf (!isVM) [{
users = [ "telegraf" ];
commands = [{
command = "${pkgs.smartmontools}/bin/smartctl";
options = [ "NOPASSWD" ];
}];
}];
# avoid logging sudo use
security.sudo.configFile = ''
Defaults:telegraf !syslog,!pam_session
'';
# create dummy file to avoid telegraf errors
systemd.tmpfiles.rules = [
"f /var/log/telegraf/dummy 0444 root root - -"
];
}
|
