From 396ffdcffc42d13777025f9adcc5e9f8d5255279 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Mierzwa?= <l.mierzwa@gmail.com>
Date: Sat, 8 May 2021 11:20:11 +0100
Subject: [PATCH] fix(docs): mention empty source rewrite

---
 docs/CONFIGURATION.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/docs/CONFIGURATION.md b/docs/CONFIGURATION.md
index b9236ee42..1f8ca3444 100644
--- a/docs/CONFIGURATION.md
+++ b/docs/CONFIGURATION.md
@@ -740,6 +740,8 @@ history:
   when connecting to Prometheus API if `source` field in alert uses addresses
   not reachable from karma.
   All regexes are anchored, `${N}` syntax can be used for capture groups.
+  You can rewrite uri to an empty string to disable connecting to that
+  specific Prometheus instance.
 
 Defaults:
 
@@ -772,6 +774,16 @@ history:
       uri: 'http://prometheus-$1.internal'
 ```
 
+Example with rewrite rule that will disable sending any history queries to
+`http://prometheus.internal`:
+
+```YAML
+history:
+  rewrite:
+    - source: 'http://prometheus.internal'
+      uri: ''
+```
+
 ### Karma
 
 `karma` section allows configuring miscellaneous internal options.