From dd56520cdfe1ccb848ae119e8b2dbd6ce62b8a78 Mon Sep 17 00:00:00 2001
From: Amaury Denoyelle <adenoyelle@haproxy.com>
Date: Thu, 26 Aug 2021 15:35:59 +0200
Subject: [PATCH] BUG/MINOR: resolvers: mark servers with name-resolution as
 non purgeable

When a server is configured with name-resolution, resolvers objects are
created with reference to this server. Thus the server is marked as non
purgeable to prevent its removal at runtime.

This does not need to be backport.
---
 src/resolvers.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/resolvers.c b/src/resolvers.c
index 1704d7227..3b9a246e6 100644
--- a/src/resolvers.c
+++ b/src/resolvers.c
@@ -2470,6 +2470,8 @@ static int resolvers_finalize_config(void)
 				err_code |= (ERR_ALERT|ERR_ABORT);
 				continue;
 			}
+
+			srv->flags |= SRV_F_NON_PURGEABLE;
 		}
 	}