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|
{
config,
lib,
pkgs,
...
}: let
cfg = config.vhack.monitoring.loki;
in {
options.vhack.monitoring.loki = {
enable = lib.mkEnableOption "loki";
port = lib.mkOption {
type = lib.types.port;
description = "Port where Loki listens to HTTP requests.";
default = 3002;
};
};
config = lib.mkIf cfg.enable {
vhack = {
persist.directories = [
{
directory = "/var/lib/loki";
user = "loki";
group = "loki";
mode = "0700";
}
{
directory = "/var/lib/fluent-bit";
user = "fluent-bit";
group = "fluent-bit";
mode = "0700";
}
];
};
users = {
groups = {
fluent-bit = {
gid = config.vhack.constants.ids.gids.fluent-bit;
};
loki = {
gid = config.vhack.constants.ids.gids.loki;
};
};
users = {
fluent-bit = {
isSystemUser = true;
group = "fluent-bit";
uid = config.vhack.constants.ids.uids.fluent-bit;
};
loki = {
isSystemUser = true;
group = "loki";
uid = config.vhack.constants.ids.uids.loki;
};
};
};
# I decided to switch to fluent-bit because it can be tested locally https://docs.fluentbit.io/manual/local-testing/logging-pipeline
systemd.services.fluent-bit = {
serviceConfig = {
StateDirectory = "fluent-bit";
User = "fluent-bit";
Group = "fluent-bit";
DynamicUser = lib.mkForce false;
};
};
services = {
fluent-bit = {
enable = true;
settings = {
service = {
flush = 1;
log_level = "info";
http_server = "true";
http_listen = "127.0.0.1";
http_port = 9080;
grace = 30;
};
pipeline = {
inputs = [
{
name = "systemd";
# The asterisk appends the _SYSTEMD_UNIT to the prefix.
tag = "systemd.*";
# Read logs from this systemd journal directory.
path = "/var/log/journal";
# Database file to keep track of the journald cursor.
db = "/var/lib/fluent-bit/systemd.db";
# Start reading new entries. Skip entries already stored in journald.
read_from_tail = true;
# Max entries to lookback on start.
max_entries = 10000;
}
];
outputs = [
{
name = "loki";
match = "systemd.*";
host = "localhost";
port = config.services.loki.configuration.server.http_listen_port;
labels = lib.concatMapAttrsStringSep ", " (n: v: "${n}=${v}") {
job = "systemd-journal";
inherit (config.vhack.monitoring.grafana) fqdn;
hostname = config.networking.hostName;
};
label_keys = "$unit";
}
];
};
};
graceLimit = "1m";
};
loki = {
enable = true;
dataDir = "/var/lib/loki";
package = pkgs.grafana-loki;
configuration = {
auth_enabled = false;
server.http_listen_port = cfg.port;
common = {
ring = {
instance_addr = "127.0.0.1";
kvstore = {
store = "inmemory";
};
};
replication_factor = 1;
path_prefix = "/tmp/loki";
};
schema_config = {
configs = [
{
from = "2020-05-15";
store = "tsdb";
object_store = "filesystem";
schema = "v13";
index = {
prefix = "index_";
period = "24h";
};
}
];
};
storage_config = {
filesystem.directory = "/tmp/loki/chunks";
};
};
};
};
};
}
|
