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{ config, pkgs, name, ... }:
# Initialization
# CREATE INDEX ON LOGS (tag);
# CREATE INDEX ON LOGS (time);
# CREATE INDEX ON LOGS (((data->>'PRIORITY')::int));
# CREATE INDEX ON LOGS ((data->>'_SYSTEMD_UNIT'));
# CREATE INDEX ON LOGS ((data->>'SYSLOG_IDENTIFIER'));
let
fluent-bit-config = {
pipeline = {
inputs = [
{
name = "systemd";
tag = "${name}.systemd";
DB = "/var/lib/fluentbit/fluent-bit.db";
}
];
outputs = [
{
name = "loki";
match = "${name}.systemd";
line_format = "json";
labels = "job=fluentbit, server=${name}, priority=$PRIORITY, syslog_identifier=$SYSLOG_IDENTIFIER, systemd_unit=$_SYSTEMD_UNIT";
}
{
name = "pgsql";
match = "*";
host = "/run/postgresql";
user = "fluentbit";
table = "logs";
database = "fluentbit";
timestamp_key = "event_timestamp";
}
];
};
};
yamlFormat = pkgs.formats.yaml {};
psqlVersion = pkgs.postgresql_16.psqlSchema;
in
{
disko.devices.zpool.zfast.datasets."root/persist/var/lib/loki" =
{ type = "zfs_fs"; mountpoint = "/persist/zfast/var/lib/loki"; options.mountpoint = "legacy"; };
disko.devices.zpool.zfast.datasets."root/persist/var/lib/fluentbit" =
{ type = "zfs_fs"; mountpoint = "/persist/zfast/var/lib/fluentbit"; options.mountpoint = "legacy"; };
disko.devices.zpool.zfast.datasets."root/persist/var/lib/postgresql" =
{ type = "zfs_fs"; mountpoint = "/persist/zfast/var/lib/postgresql"; options.mountpoint = "legacy"; };
disko.devices.zpool.zfast.datasets."root/persist/var/lib/postgresql/${psqlVersion}" =
{ type = "zfs_fs"; mountpoint = "/persist/zfast/var/lib/postgresql/${psqlVersion}"; options.mountpoint = "legacy"; };
environment.persistence."/persist/zfast".directories = [
{
directory = "/var/lib/postgresql";
user = config.users.users.postgres.name;
group = config.users.users.postgres.group;
mode = "0755";
}
{
directory = "/var/lib/postgresql/${psqlVersion}";
user = config.users.users.postgres.name;
group = config.users.users.postgres.group;
mode = "0755";
}
{
directory = "/var/lib/fluentbit";
user = config.users.users.fluentbit.name;
group = config.users.users.fluentbit.group;
mode = "0755";
}
{
directory = "/var/lib/loki";
user = config.users.users.loki.name;
group = config.users.users.loki.group;
mode = "0755";
}
];
ids.uids.fluentbit = 500;
ids.gids.fluentbit = 500;
users.users.fluentbit = {
name = "fluentbit";
home = "/var/lib/fluentbit";
uid = config.ids.uids.fluentbit;
group = "fluentbit";
isSystemUser = true;
extraGroups = [ "systemd-journal" ];
};
users.groups.fluentbit.gid = config.ids.gids.fluentbit;
services.loki = {
enable = true;
configuration = {
auth_enabled = false;
common = {
ring.kvstore.store = "inmemory";
ring.instance_addr = "127.0.0.1";
replication_factor = 1;
path_prefix = "/var/lib/loki";
};
server.log_level = "warn";
limits_config = {
reject_old_samples = false;
ingestion_rate_mb = 100;
ingestion_burst_size_mb = 200;
per_stream_rate_limit = "100MB";
per_stream_rate_limit_burst = "200MB";
};
schema_config.configs = [
{
from = "2020-10-24";
store = "boltdb-shipper";
object_store = "filesystem";
schema = "v11";
index.prefix = "index_";
index.period = "24h";
}
];
};
};
systemd.services.postgresql.after = [
"var-lib-postgresql.mount"
"var-lib-postgresql-16.mount"
"persist-zfast-var-lib-postgresql.mount"
"persist-zfast-var-lib-postgresql-16.mount"
];
systemd.services.postgresql.unitConfig = {
BindsTo = [
"var-lib-postgresql.mount"
"var-lib-postgresql-16.mount"
"persist-zfast-var-lib-postgresql.mount"
"persist-zfast-var-lib-postgresql-16.mount"
];
};
services.postgresql = {
enable = true;
package = pkgs.postgresql_16;
ensureDatabases = [ "fluentbit" ];
ensureUsers = [
{
name = "fluentbit";
ensureDBOwnership = true;
}
];
};
environment.systemPackages = [
pkgs.fluent-bit
];
systemd.services.fluent-bit = {
description = "Fluent-bit daemon";
wantedBy = [ "multi-user.target" ];
serviceConfig = {
ExecStart = "${pkgs.fluent-bit}/bin/fluent-bit -c ${yamlFormat.generate "fluent.yaml" fluent-bit-config}";
User = "fluentbit";
Group = "fluentbit";
SupplementaryGroups = [ "systemd-journal" ];
};
};
}
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