kolla-ansible/ansible/roles/haproxy-config/templates/haproxy_single_service_split.cfg.j2

#jinja2: lstrip_blocks: True
{%- set tls_bind_info = 'ssl crt /etc/haproxy/haproxy.pem' if kolla_enable_tls_external|bool else '' %}

{%- macro userlist_macro(service_name, auth_user, auth_pass) %}
userlist {{ service_name }}-user
  user {{ auth_user }} insecure-password {{ auth_pass }}
{% endmacro %}

{%- macro frontend_macro(service_name, service_port, service_mode, external,
                         frontend_http_extra, frontend_tcp_extra) %}
frontend {{ service_name }}_front
    {% if service_mode == 'redirect' %}
    mode http
    {% else %}
    mode {{ service_mode }}
    {% endif %}
    {% if service_mode == 'http' %}
    {# Delete any pre-populated XFP header #}
    http-request del-header X-Forwarded-Proto
        {% for http_option in frontend_http_extra %}
    {{ http_option }}
        {% endfor %}
    {% elif service_mode == 'tcp' %}
        {% for tcp_option in frontend_tcp_extra %}
    {{ tcp_option }}
        {% endfor %}
    {% endif %}
    {% set tls_option = '' %}
    {% if external|bool %}
        {% set vip_address = kolla_external_vip_address %}
        {% if service_mode == 'http' %}
            {% set tls_option = tls_bind_info %}
    {# Replace the XFP header for external https requests #}
    http-request set-header X-Forwarded-Proto https if { ssl_fc }
        {% endif %}
    {% else %}
        {% set vip_address = kolla_internal_vip_address %}
    {% endif %}
    {{ "bind %s:%s %s"|e|format(vip_address, service_port, tls_option)|trim() }}
    {# Redirect mode sets a redirect scheme instead of a backend #}
    {% if service_mode == 'redirect' %}
    redirect scheme https code 301 if !{ ssl_fc }
    {% else %}
    default_backend {{ service_name }}_back
    {% endif %}
{% endmacro %}

{%- macro backend_macro(service_name, service_port, service_mode, host_group,
                        custom_member_list, backend_http_extra,
                        backend_tcp_extra, auth_user, auth_pass) %}
backend {{ service_name }}_back
    {% if service_mode == 'redirect' %}
    mode http
    {% else %}
    mode {{ service_mode }}
    {% endif %}
    {% if service_mode == 'http' %}
        {# Set up auth if required #}
        {% if auth_user and auth_pass %}
    acl auth_acl http_auth({{ service_name }}-user)
    http-request auth realm basicauth unless auth_acl
        {% endif %}
        {% for http_option in backend_http_extra %}
    {{ http_option }}
        {% endfor %}
    {% elif service_mode == 'tcp' %}
        {% for tcp_option in backend_tcp_extra %}
    {{ tcp_option }}
        {% endfor %}
    {% endif %}
    {% if custom_member_list is not none %}
        {% for custom_member in custom_member_list %}
    {{ custom_member }}
        {% endfor %}
    {% else %}
        {% for host in groups[host_group] %}
            {% set api_interface = "ansible_%s"|format(hostvars[host]['api_interface']) %}
            {% set host_name = hostvars[host]['ansible_hostname'] %}
            {% set host_ip = hostvars[host][api_interface]['ipv4']['address'] %}
    server {{ host_name }} {{ host_ip }}:{{ service_port }} {{ haproxy_health_check }}
        {% endfor %}
    {% endif %}
{% endmacro %}

{%- set haproxy = service.haproxy|default({}) %}
{%- for haproxy_name, haproxy_service in haproxy.items() %}
    {# External defaults to false #}
    {% set external = haproxy_service.external|default(false)|bool %}
    {# Skip anything that is external when the external vip is not enabled #}
    {% if haproxy_service.enabled|bool and (not external or haproxy_enable_external_vip|bool)%}
        {# Here we define variables and their defaults #}
        {# Custom member list can use jinja to generate a semicolon separated list #}
        {% set custom_member_list = haproxy_service.custom_member_list|default() %}
        {# Mode defaults to http #}
        {% set mode = haproxy_service.mode|default('http') %}
        {# Use the parent host group but allow it to be overridden #}
        {% set host_group = haproxy_service.host_group|default(service.group) %}
        {# Additional options can be defined in config, and are additive to the global extras #}
        {% set frontend_tcp_extra = haproxy_service.frontend_tcp_extra|default([]) + haproxy_frontend_tcp_extra %}
        {% set backend_tcp_extra = haproxy_service.backend_tcp_extra|default([]) %}
        {% set frontend_http_extra = haproxy_service.frontend_http_extra|default([]) + haproxy_frontend_http_extra %}
        {% set backend_http_extra = haproxy_service.backend_http_extra|default([]) %}
        {# Allow for basic auth #}
        {% set auth_user = haproxy_service.auth_user|default() %}
        {% set auth_pass = haproxy_service.auth_pass|default() %}
        {% if auth_user and auth_pass %}
{{ userlist_macro(haproxy_name, auth_user, auth_pass) }}
        {% endif %}
{{ frontend_macro(haproxy_name, haproxy_service.port, mode, external,
                  frontend_http_extra, frontend_tcp_extra) }}
        {# Redirect (to https) is a special case, as it does not include a backend #}
        {% if haproxy_service.mode != 'redirect' %}
{{ backend_macro(haproxy_name, haproxy_service.port, mode, host_group,
                 custom_member_list, backend_http_extra, backend_tcp_extra,
                 auth_user, auth_pass) }}
        {% endif %}
    {% endif %}
{%- endfor -%}