This change is needed we stopped adding "127.0.0.1 {{ internal_host }}" to /etc/hosts. Since haproxy uses the host name as the route to httpd, this change to /etc/hosts means the host name no longer leads to localhost, which means haproxy can't talk to httpd anymore. And I want haproxy to use the host name so it can verify TLS. Hence the need to bind httpd to all interfaces.
This change is needed we stopped adding "127.0.0.1 {{ internal_host }}" to /etc/hosts. Since haproxy uses the host name as the route to httpd, this change to /etc/hosts means the host name no longer leads to localhost, which means haproxy can't talk to httpd anymore. And I want haproxy to use the host name so it can verify TLS. Hence the need to bind httpd to all interfaces.