From 68b0c0851a58286127daccd6753d2e7b3cfa63bf Mon Sep 17 00:00:00 2001
From: Mark Goddard <mark@stackhpc.com>
Date: Wed, 17 Apr 2024 11:57:16 +0100
Subject: [PATCH] deployment: Assert that there is only one HAProxy server

Currently we are not deploying any failover mechanism such as keepalived,
so limit to one HAProxy server.
---
 deployment/site.yml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/deployment/site.yml b/deployment/site.yml
index df41519..705d182 100644
--- a/deployment/site.yml
+++ b/deployment/site.yml
@@ -391,6 +391,13 @@
     - haproxy
   become: true
   tasks:
+    # Currently we are not deploying any failover mechanism such as keepalived,
+    # so limit to one HAProxy server.
+    - name: Assert that there is only one HAProxy server
+      ansible.builtin.assert:
+        that:
+          groups['haproxy'] | length == 1
+
     - name: Ensure /etc/haproxy directory exists
       ansible.builtin.file:
         path: /etc/haproxy