prometheus: relabel some machines

Don't use the IP from wireguard as the name of the host, let's map to
the actual hostname.

1 files changed, 20 insertions, 12 deletions

diff --git a/hosts/common/server/prometheus.nix b/hosts/common/server/prometheus.nix
index 1c7c906..a27e3cc 100644
--- a/hosts/common/server/prometheus.nix
+++ b/hosts/common/server/prometheus.nix
@@ -1,12 +1,5 @@
 { config, pkgs, lib, ... }:
 
-let
-  # Scrape a list of static targets for a job.
-  staticScrape = (job_name: targets: {
-    inherit job_name;
-    static_configs = [{ inherit targets; }];
-  });
-in
 {
   services.prometheus = {
     enable = true;
@@ -15,15 +8,30 @@ in
 
     extraFlags = [
       # 3 years of retention
-      "--storage.tsdb.retention=1095d"
+      "--storage.tsdb.retention=${toString (365 * 3)}d"
       "--web.enable-admin-api"
     ];
 
     scrapeConfigs = [
-      (staticScrape "node" [
-        "rtr:9100"
-        "tahoe:9100"
-      ])
+      {
+        job_name = "node";
+        static_configs = [
+          {targets = ["192.168.6.10:9100" "192.168.6.20:9100"]; }
+        ];
+        relabel_configs = [{
+          source_labels = ["__address__"];
+          target_label = "instance";
+          replacement = "nas";
+          action = "replace";
+          regex = "192\.168\.6\.10:(.*)";
+        } {
+          source_labels = ["__address__"];
+          target_label = "instance";
+          replacement = "tahoe";
+          action = "replace";
+          regex = "192\.168\.6\.20:(.*)";
+        }];
+      }
     ];
   };
 }