nixpkgs/nixos/modules/services/databases/influxdb.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.influxdb;
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configOptions = recursiveUpdate {
meta = {
bind-address = ":8088";
commit-timeout = "50ms";
dir = "${cfg.dataDir}/meta";
election-timeout = "1s";
heartbeat-timeout = "1s";
hostname = "localhost";
leader-lease-timeout = "500ms";
retention-autocreate = true;
};
data = {
dir = "${cfg.dataDir}/data";
wal-dir = "${cfg.dataDir}/wal";
max-wal-size = 104857600;
wal-enable-logging = true;
wal-flush-interval = "10m";
wal-partition-flush-delay = "2s";
};
cluster = {
shard-writer-timeout = "5s";
write-timeout = "5s";
};
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retention = {
enabled = true;
check-interval = "30m";
};
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http = {
enabled = true;
auth-enabled = false;
bind-address = ":8086";
https-enabled = false;
log-enabled = true;
pprof-enabled = false;
write-tracing = false;
};
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monitor = {
store-enabled = false;
store-database = "_internal";
store-interval = "10s";
};
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admin = {
enabled = true;
bind-address = ":8083";
https-enabled = false;
};
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graphite = [{
enabled = false;
}];
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udp = [{
enabled = false;
}];
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collectd = [{
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enabled = false;
typesdb = "${pkgs.collectd-data}/share/collectd/types.db";
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database = "collectd_db";
bind-address = ":25826";
}];
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opentsdb = [{
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enabled = false;
}];
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continuous_queries = {
enabled = true;
log-enabled = true;
recompute-previous-n = 2;
recompute-no-older-than = "10m";
compute-runs-per-interval = 10;
compute-no-more-than = "2m";
};
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hinted-handoff = {
enabled = true;
dir = "${cfg.dataDir}/hh";
max-size = 1073741824;
max-age = "168h";
retry-rate-limit = 0;
retry-interval = "1s";
};
} cfg.extraConfig;
configFile = pkgs.runCommand "config.toml" {
buildInputs = [ pkgs.remarshal ];
} ''
remarshal -if json -of toml \
< ${pkgs.writeText "config.json" (builtins.toJSON configOptions)} \
> $out
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'';
in
{
###### interface
options = {
services.influxdb = {
enable = mkOption {
default = false;
description = "Whether to enable the influxdb server";
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type = types.bool;
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};
package = mkOption {
default = pkgs.influxdb;
defaultText = "pkgs.influxdb";
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description = "Which influxdb derivation to use";
type = types.package;
};
user = mkOption {
default = "influxdb";
description = "User account under which influxdb runs";
type = types.string;
};
group = mkOption {
default = "influxdb";
description = "Group under which influxdb runs";
type = types.string;
};
dataDir = mkOption {
default = "/var/db/influxdb";
description = "Data directory for influxd data files.";
type = types.path;
};
extraConfig = mkOption {
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default = {};
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description = "Extra configuration options for influxdb";
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type = types.attrs;
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};
};
};
###### implementation
config = mkIf config.services.influxdb.enable {
systemd.services.influxdb = {
description = "InfluxDB Server";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
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serviceConfig = {
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ExecStart = ''${cfg.package}/bin/influxd -config "${configFile}"'';
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User = "${cfg.user}";
Group = "${cfg.group}";
PermissionsStartOnly = true;
};
preStart = ''
mkdir -m 0770 -p ${cfg.dataDir}
if [ "$(id -u)" = 0 ]; then chown -R ${cfg.user}:${cfg.group} ${cfg.dataDir}; fi
'';
postStart = mkBefore ''
until ${pkgs.curl.bin}/bin/curl -s -o /dev/null ${if configOptions.http.https-enabled then "-k https" else "http"}://127.0.0.1${toString configOptions.http.bind-address}/ping; do
sleep 1;
done
'';
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};
users.extraUsers = optional (cfg.user == "influxdb") {
name = "influxdb";
uid = config.ids.uids.influxdb;
description = "Influxdb daemon user";
};
users.extraGroups = optional (cfg.group == "influxdb") {
name = "influxdb";
gid = config.ids.gids.influxdb;
};
};
}