Merge pull request #1441 from stackhpc/cherry-pick-371c8f-stackhpc/2023.1

Fix NONE/503 errors in Squid proxy (cherry-pick #1434)

Author: mnasiadka

etc/kayobe/containers/squid_proxy/squid.conf

@@ -77,3 +77,7 @@ refresh_pattern ^ftp:		1440	20%	10080
 refresh_pattern ^gopher:	1440	0%	1440
 refresh_pattern -i (/cgi-bin/|\?) 0	0%	0
 refresh_pattern .		0	20%	4320
+
+# Disable connections over IPv6
+# https://ramesh-sahoo.medium.com/squid-proxy-server-has-stopped-handling-connection-resulting-in-none-503-0-connect-errors-55477316850a
+dns_v4_first on

releasenotes/notes/fix-squid-issue-11b5f03719ab8b45.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Fixes an issue where Squid proxy could be unable to reach external servers
+    due to a preference of choosing IPv6 connectivity by default.