From 85c65818f638f0dbbc1c7b39571a54e428dda202 Mon Sep 17 00:00:00 2001
From: statiksof <42906766+statiksof@users.noreply.github.com>
Date: Thu, 12 Nov 2020 13:17:16 +0100
Subject: [PATCH] Update ldapauthenticator.py

---
 ldapauthenticator/ldapauthenticator.py | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/ldapauthenticator/ldapauthenticator.py b/ldapauthenticator/ldapauthenticator.py
index 36f2e0d..a1d5849 100644
--- a/ldapauthenticator/ldapauthenticator.py
+++ b/ldapauthenticator/ldapauthenticator.py
@@ -12,7 +12,7 @@
 
 
 class LDAPAuthenticator(Authenticator):
-    server_address = Unicode(
+    server_address = List(
         config=True,
         help="""
         Address of the LDAP server to contact.
@@ -305,14 +305,15 @@ def resolve_username(self, username_supplied_by_user):
         return (user_dn, response[0]["dn"])
 
     def get_connection(self, userdn, password):
-        server = ldap3.Server(
-            self.server_address, port=self.server_port, use_ssl=self.use_ssl
-        )
+        server_pool = ldap3.ServerPool(self.server_address,
+                                       ldap3.ROUND_ROBIN,
+                                       active=True,
+                                       exhaust=True)
         auto_bind = (
-            ldap3.AUTO_BIND_NO_TLS if self.use_ssl else ldap3.AUTO_BIND_TLS_BEFORE_BIND
+            self.use_ssl and ldap3.AUTO_BIND_TLS_BEFORE_BIND or ldap3.AUTO_BIND_NO_TLS
         )
         conn = ldap3.Connection(
-            server, user=userdn, password=password, auto_bind=auto_bind
+            server_pool, user=userdn, password=password, auto_bind=auto_bind
         )
         return conn