erp5: Add dynamic balancer's apache config template.

stack/erp5/buildout.cfg

@@ -296,7 +296,7 @@ extra-context =
 [template-erp5]
 < = download-base
 filename = instance-erp5.cfg.in
-md5sum = 4c552f915eb6549ce160a9ff5871ae74
+md5sum = ff8ecdc258e2529b3979fd6596a27b95
 
 [template-zeo]
 < = download-base
@@ -330,7 +330,7 @@ link-binary =
 [template-balancer]
 < = download-base
 filename = instance-balancer.cfg.in
-md5sum = 3628f0ba358e7ee96a8d0185c4775911
+md5sum = 8f6e55a0972b086bed4e40d4f49608ca
 
 [template-apache-conf]
 < = download-base

stack/erp5/instance-balancer.cfg.in

@@ -16,6 +16,12 @@ per partition. No more (undefined result), no less (IndexError).
 {%   do apache_ip_list.append('[' ~ ipv6 ~ ']') -%}
 {% endif -%}
 
+{% if slapparameter_dict.get('custom-template-apache-conf', None) -%}
+{%   set apache_conf_template = slapparameter_dict['custom-template-apache-conf'] -%}
+{% else -%}
+{%   set apache_conf_template = parameter_dict['template-apache-conf'] -%}
+{% endif -%}
+
 [simplefile]
 recipe = slapos.recipe.template:jinja2
 template = inline:{{ '{{ content }}' }}
@@ -134,7 +140,7 @@ crl = ${apache-ssl-client:crl}
 
 [apache-conf]
 recipe = slapos.recipe.template:jinja2
-template = {{ parameter_dict['template-apache-conf'] }}
+template = {{ dumps(apache_conf_template) }}
 rendered = ${directory:apache-conf}/apache.conf
 context = section parameter_dict apache-conf-parameter-dict
 

stack/erp5/instance-erp5.cfg.in

@@ -178,6 +178,7 @@ config-{{ name }} = {{ ' ${' ~ zope_section_id ~ ':connection-zope-address-list}
 config-haproxy-server-check-path = {{ dumps(balancer_dict.get('haproxy-server-check-path', '/') % {'site-id': site_id}) }}
 config-backend-path = {{ dumps(balancer_dict.get('apache-backend-path', '/') % {'site-id': site_id}) }}
 config-ssl = {{ dumps(balancer_dict.get('ssl', {})) }}
+config-custom-template-apache-conf = {{ dumps(balancer_dict.get('custom-template-apache-conf', None)) }}
 
 [request-frontend-base]
 {% if has_frontend -%}