{ config, pkgs, ... }: { services.opentelemetry-collector.settings = { exporters.loki = { endpoint = "http://127.0.0.1:${toString config.services.loki.configuration.server.http_listen_port}/loki/api/v1/push"; default_labels_enabled = { exporter = true; job = true; instance = true; level = true; }; }; processors = { attributes.actions = [ { action = "insert"; key = "loki.attribute.labels"; value = "job, unit, boot_id, instance, facility, priority"; } ]; resource.attributes = [ { action = "insert"; key = "loki.resource.labels"; value = "host.name"; } { action = "insert"; key = "loki.format"; value = "raw"; } ]; }; service.pipelines.logs.exporters = [ "loki" ]; service.pipelines.logs.processors = [ "resource" "attributes" ]; }; services.loki = { enable = true; # https://grafana.com/docs/loki/latest/configure/#supported-contents-and-default-values-of-lokiyaml configuration = { server = { http_listen_port = 3100; log_level = "warn"; }; auth_enabled = false; ingester = { lifecycler = { address = "127.0.0.1"; ring = { kvstore = { store = "inmemory"; }; replication_factor = 1; }; }; chunk_idle_period = "1h"; max_chunk_age = "1h"; chunk_target_size = 999999; chunk_retain_period = "30s"; max_transfer_retries = 0; }; schema_config = { configs = [{ from = "2022-06-06"; store = "boltdb-shipper"; object_store = "filesystem"; schema = "v11"; index = { prefix = "index_"; period = "24h"; }; }]; }; storage_config = { boltdb_shipper = { active_index_directory = "/var/lib/loki/boltdb-shipper-active"; cache_location = "/var/lib/loki/boltdb-shipper-cache"; cache_ttl = "24h"; shared_store = "filesystem"; }; filesystem = { directory = "/var/lib/loki/chunks"; }; }; limits_config = { reject_old_samples = true; reject_old_samples_max_age = "168h"; }; chunk_store_config = { max_look_back_period = "0s"; }; table_manager = { retention_deletes_enabled = false; retention_period = "0s"; }; compactor = { working_directory = "/var/lib/loki"; shared_store = "filesystem"; compactor_ring = { kvstore = { store = "inmemory"; }; }; }; # The query_range block configures the query splitting and caching in the Loki query-frontend. query_range = { # Perform query parallelisations based on storage sharding configuration and # query ASTs. This feature is supported only by the chunks storage engine. parallelise_shardable_queries = false; # false because of https://github.com/grafana/loki/issues/7649#issuecomment-1625645403 }; }; # user, group, dataDir, extraFlags, (configFile) }; # https://grafana.com/docs/grafana/latest/datasources/loki/#provision-the-loki-data-source services.grafana.provision.datasources.settings = { apiVersion = 1; datasources = [ { name = "Loki"; type = "loki"; uid = "loki01"; url = "http://localhost:${toString config.services.loki.configuration.server.http_listen_port}"; jsonData = { timeout = 360; maxLines = 1000; }; } ]; }; }