stats-nixos-config/collector.nix

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{ config, lib, pkgs, ... }:
let
collector = pkgs.fetchFromGitHub {
owner = "tokudan";
repo = "ffhh-stats";
rev = "76c61a0c0f7d276fd79026b551780e318901adf6";
sha256 = "0irnc8ffm413aq3sh64sd2457yp2ax4paaf0ss9r1pkbkb8q5dgx";
};
collector-config = pkgs.writeText "collector-config" ''
graph_json = https://hopglass-backend.hamburg.freifunk.net/mv1/graph.json
nodes_json = https://hopglass-backend.hamburg.freifunk.net/mv1/nodes.json
interval = 300
interval_forced = true
influx_url = http://127.0.0.1:8086/write?db=freifunk&u=knotendaten&p=@@INFLUXPASS@@&precision=s
region = ffhh
groups_dir = /home/freifunk/ffhh-statsgroups
'';
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in
{
systemd.services.collector = {
wantedBy = [ "multi-user.target" ];
after = [ "network-online.target" ];
requires = [ "influxdb.service" ];
path = [ pkgs.wget ];
serviceConfig = {
Type = "simple";
Restart = "always";
RestartSec = 65;
DynamicUser = true;
PrivateTmp = true;
RuntimeDirectory = "collector";
ExecStart = "${pkgs.ruby.withPackages (ps: with ps; [ json ])}/bin/ruby ${collector}/query-data.influx --config /run/collector/collector-config";
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ExecStartPre = "+${pkgs.writeShellScript "collector-init" ''
until [ -s /var/lib/influxdb/knotendaten.pw ]; do
sleep 1
done
read -N 32 -r knotendatenpw < /var/lib/influxdb/knotendaten.pw
${pkgs.gnused}/bin/sed -e "s/@@INFLUXPASS@@/$knotendatenpw/g" "${collector-config}" > /run/collector/collector-config
'' }";
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};
};
}