2024-03-31

1 files changed, 57 insertions, 52 deletions

diff --git a/modules/nixos/promtail.nix b/modules/nixos/promtail.nix
index 28dc897..65d88d4 100644
--- a/modules/nixos/promtail.nix
+++ b/modules/nixos/promtail.nix
@@ -4,9 +4,11 @@
   this,
   ...
 }:
-with lib; let
+with lib;
+let
   cfg = config.nixfiles.modules.promtail;
-in {
+in
+{
   options.nixfiles.modules.promtail = {
     enable = mkEnableOption "Promtail";
 
@@ -25,7 +27,7 @@ in {
     filters = mkOption {
       description = ''Filters to use with "scrape_config.pipeline_stages".'';
       type = with types; listOf attrs;
-      default = [];
+      default = [ ];
     };
   };
 
@@ -64,60 +66,63 @@ in {
             job_name = "journal";
             journal.max_age = "24h";
             relabel_configs =
-              map (n: let
-                label = toLower n;
-              in {
-                source_labels = ["__journal_${label}"];
-                target_label =
-                  if hasPrefix "_" label
-                  then substring 1 (stringLength label - 1) label
-                  else label;
-              }) [
-                # Derived from systemd.journal fields[1].
-                #
-                # [1]: https://github.com/coreos/go-systemd/blob/main/sdjournal/journal.go#L335
-                # [1]: https://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html
+              map
+                (
+                  n:
+                  let
+                    label = toLower n;
+                  in
+                  {
+                    source_labels = [ "__journal_${label}" ];
+                    target_label = if hasPrefix "_" label then substring 1 (stringLength label - 1) label else label;
+                  }
+                )
+                [
+                  # Derived from systemd.journal fields[1].
+                  #
+                  # [1]: https://github.com/coreos/go-systemd/blob/main/sdjournal/journal.go#L335
+                  # [1]: https://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html
 
-                "MESSAGE"
-                # "MESSAGE_ID"
-                "PRIORITY"
-                # "CODE_FILE"
-                # "CODE_LINE"
-                # "CODE_FUNC"
-                # "ERRNO"
-                "SYSLOG_FACILITY"
-                "SYSLOG_IDENTIFIER"
-                # "SYSLOG_PID"
-                # "_PID"
-                # "_UID"
-                # "_GID"
-                # "_COMM"
-                # "_EXE"
-                "_CMDLINE"
-                # "_CAP_EFFECTIVE"
-                # "_AUDIT_SESSION"
-                # "_AUDIT_LOGINUID"
-                # "_SYSTEMD_CGROUP"
-                # "_SYSTEMD_SESSION"
-                # "_SYSTEMD_UNIT"
-                # "_SYSTEMD_USER_UNIT"
-                # "_SYSTEMD_OWNER_UID"
-                # "_SYSTEMD_SLICE"
-                # "_SELINUX_CONTEXT"
-                # "_SOURCE_REALTIME_TIMESTAMP"
-                # "_BOOT_ID"
-                # "_MACHINE_ID"
-                "_HOSTNAME"
-                # "_TRANSPORT"
-                # "__CURSOR"
-                # "__REALTIME_TIMESTAMP"
-                # "__MONOTONIC_TIMESTAMP"
-              ]
+                  "MESSAGE"
+                  # "MESSAGE_ID"
+                  "PRIORITY"
+                  # "CODE_FILE"
+                  # "CODE_LINE"
+                  # "CODE_FUNC"
+                  # "ERRNO"
+                  "SYSLOG_FACILITY"
+                  "SYSLOG_IDENTIFIER"
+                  # "SYSLOG_PID"
+                  # "_PID"
+                  # "_UID"
+                  # "_GID"
+                  # "_COMM"
+                  # "_EXE"
+                  "_CMDLINE"
+                  # "_CAP_EFFECTIVE"
+                  # "_AUDIT_SESSION"
+                  # "_AUDIT_LOGINUID"
+                  # "_SYSTEMD_CGROUP"
+                  # "_SYSTEMD_SESSION"
+                  # "_SYSTEMD_UNIT"
+                  # "_SYSTEMD_USER_UNIT"
+                  # "_SYSTEMD_OWNER_UID"
+                  # "_SYSTEMD_SLICE"
+                  # "_SELINUX_CONTEXT"
+                  # "_SOURCE_REALTIME_TIMESTAMP"
+                  # "_BOOT_ID"
+                  # "_MACHINE_ID"
+                  "_HOSTNAME"
+                  # "_TRANSPORT"
+                  # "__CURSOR"
+                  # "__REALTIME_TIMESTAMP"
+                  # "__MONOTONIC_TIMESTAMP"
+                ]
               ++ [
                 {
                   # This is weird. I can't find where is this defined in the
                   # source code but apparently it exists.
-                  source_labels = ["__journal_priority_keyword"];
+                  source_labels = [ "__journal_priority_keyword" ];
                   target_label = "level";
                 }
               ];