From 1c4b32925e8cb4505d468443810f1375b21fae72 Mon Sep 17 00:00:00 2001
From: "Dustin C. Hatch" <dustin@hatch.name>
Date: Sat, 22 Jun 2024 19:51:59 -0500
Subject: [PATCH] v-m: Use dynamic discovery for some collectd nodes

We don't need to explicitly specify every single host individually.
Domain controllers, for example, are registered in DNS with SRV records.
Kubernetes nodes, of course, can be discovered using the Kubernetes API.
Both of these classes of nodes change frequently, so discovering them
dynamically is convenient.
---
 victoria-metrics/scrape.yml | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/victoria-metrics/scrape.yml b/victoria-metrics/scrape.yml
index 9adfe62..65898c2 100644
--- a/victoria-metrics/scrape.yml
+++ b/victoria-metrics/scrape.yml
@@ -81,9 +81,6 @@ scrape_configs:
   static_configs:
   - targets:
     - gw1.pyrocufflink.blue
-    - k8s-aarch64-n0.pyrocufflink.blue
-    - k8s-aarch64-n1.pyrocufflink.blue
-    - k8s-amd64-n3.pyrocufflink.blue
     - loki0.pyrocufflink.blue
     - nut0.pyrocufflink.blue
     - nvr2.pyrocufflink.blue
@@ -94,12 +91,20 @@ scrape_configs:
   file_sd_configs:
   - files:
     - /scrape/collectd/scrape-collectd.yml
+  dns_sd_configs:
+  - names:
+    - _ldap._tcp.pyrocufflink.blue
+  kubernetes_sd_configs:
+  - role: node
   relabel_configs:
+  - action: labelmap
+    regex: __meta_kubernetes_node_label_(.+)
   - source_labels:
     - __address__
     target_label: host__tmp
   - source_labels: [__address__]
     target_label: __address__
+    regex: '([^:]+)(:.*)?'
     replacement: '$1:9103'
   metric_relabel_configs:
   - source_labels: