Merge pull request #8889 from bfallonf/peerdns_1566992

Bug 1566992 added note on peerdns setting set to yes

Author: Brice Fallon-Freeman

install_config/install/prerequisites.adoc

@@ -334,6 +334,8 @@ any other type of DNS application.
 [NOTE]
 ====
 include::install_config/install/prerequisites.adoc[tag=networkmanager]
+
+Similarly, if the `PEERDNS` parameter is set to `no` in the network script, for example, *_/etc/sysconfig/network-scripts/ifcfg-em1_*, then the dnsmasq files are not generated, and the Ansible install will fail. Ensure the `PEERDNS` setting is set to `yes`.
 ====
 
 The following is an example set of DNS records for the xref:../../install_config/install/planning.adoc#single-master-multi-node[Single Master and Multiple Nodes] scenario: