From 9264dd19a34a57b7530ecebf0594fe4c17bb835d Mon Sep 17 00:00:00 2001
From: Pavan-Gunda <pavan.gunda@elastisys.com>
Date: Mon, 20 Nov 2023 14:33:27 +0100
Subject: [PATCH] apps: config option to set hostAliases

---
 config/config/common-config.yaml                      |  7 +++++++
 .../prometheus-blackbox-exporter-sc.yaml.gotmpl       | 11 +++++++++++
 .../prometheus-blackbox-exporter-wc.yaml.gotmpl       | 11 +++++++++++
 3 files changed, 29 insertions(+)

diff --git a/config/config/common-config.yaml b/config/config/common-config.yaml
index 8b26b9c78..0f310f2f8 100644
--- a/config/config/common-config.yaml
+++ b/config/config/common-config.yaml
@@ -291,6 +291,13 @@ hnc:
 ## Prometheus configuration.
 ## Prometheus collects metrics and pushes it to Thanos.
 prometheusBlackboxExporter:
+  # Hostaliases allow to add additional DNS entries to be injected directly into pods.
+  # This will take precedence over your implemented DNS solution
+  hostAliases: []
+  #  - ip: 192.168.1.1
+  #    hostNames:
+  #      - test.example.com
+  #      - another.example.net
   resources:
     requests:
       cpu: 10m
diff --git a/helmfile/values/prometheus-blackbox-exporter-sc.yaml.gotmpl b/helmfile/values/prometheus-blackbox-exporter-sc.yaml.gotmpl
index b8ff807b6..ec102519f 100644
--- a/helmfile/values/prometheus-blackbox-exporter-sc.yaml.gotmpl
+++ b/helmfile/values/prometheus-blackbox-exporter-sc.yaml.gotmpl
@@ -115,3 +115,14 @@ serviceMonitor:
       scrapeTimeout: 30s
       module: http_401
     {{- end }}
+
+{{- with .Values.prometheusBlackboxExporter.hostAliases }}
+hostAliases:
+  {{- range . }}
+  - ip: {{ .ip }}
+    hostNames:
+      {{- range .hostNames }}
+      - {{ . }}
+      {{- end }}
+  {{- end }}
+{{- end }}
diff --git a/helmfile/values/prometheus-blackbox-exporter-wc.yaml.gotmpl b/helmfile/values/prometheus-blackbox-exporter-wc.yaml.gotmpl
index 095085d16..752b6ceda 100644
--- a/helmfile/values/prometheus-blackbox-exporter-wc.yaml.gotmpl
+++ b/helmfile/values/prometheus-blackbox-exporter-wc.yaml.gotmpl
@@ -100,3 +100,14 @@ serviceMonitor:
       module: http_401
     {{- end }}
     {{- end }}
+
+{{- with .Values.prometheusBlackboxExporter.hostAliases }}
+hostAliases:
+  {{- range . }}
+  - ip: {{ .ip }}
+    hostNames:
+      {{- range .hostNames }}
+      - {{ . }}
+      {{- end }}
+  {{- end }}
+{{- end }}