Allow deployers to provide haproxy template files

Add new variables, 'octavia_user_haproxy_templates' and
'octavia_haproxy_amphora_template' to allow deployers to provide and use
custom haproxy template files with Octavia.

Change-Id: I9527081d6ba6aac8f5bddc3796f8c2513625bf70

defaults/main.yml

@@ -269,6 +269,18 @@ octavia_enable_anti_affinity: False
 # for amphora creation
 #octavia_amp_availability_zone:
 
+# List of haproxy template files to copy from deployment host to octavia hosts
+# octavia_user_haproxy_templates:
+#  - src: "/etc/openstack_deploy/octavia/haproxy_templates/base.cfg.j2"
+#    dest: "/etc/octavia/templates/base.cfg.j2"
+#  - src: "/etc/openstack_deploy/octavia/haproxy_templates/haproxy.cfg.j2"
+#    dest: "/etc/octavia/templates/haproxy.cfg.j2"
+#  - src: "/etc/openstack_deploy/octavia/haproxy_templates/macros.cfg.j2"
+#    dest: "/etc/octavia/templates/macros.cfg.j2"
+octavia_user_haproxy_templates: {}
+# Path of custom haproxy template file
+#octavia_haproxy_amphora_template: /etc/octavia/templates/haproxy.cfg.j2
+
 # Name of the Octavia management network in Neutron
 octavia_neutron_management_network_name: lbaas-mgmt
 # Name of the provider net in the system

releasenotes/notes/os-octavia-haproxy-templates-18561d31bcd7151e.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Deployers may provide a list of custom haproxy template files to copy from
+    the deployment host through the ``octavia_user_haproxy_templates`` variable
+    and configure Octavia to make use of a custom haproxy template file with
+    with ``octavia_haproxy_amphora_template`` variable.

tasks/octavia_post_install.yml

@@ -56,6 +56,15 @@
     - src: "{{ octavia_ca_private_key }}"
       dest: "/etc/octavia/certs/ca_key.pem"
 
+- name: Copy user provided HAProxy templates
+  copy:
+    src: "{{ item.src }}"
+    dest: "{{ item.dest }}"
+    owner: "{{ octavia_system_user_name }}"
+    group: "{{ octavia_system_group_name }}"
+    mode: "0640"
+  with_items: "{{ octavia_user_haproxy_templates }}"
+
 - name: Drop octavia Config(s)
   config_template:
     src: "{{ item.src }}"

templates/octavia.conf.j2

@@ -120,7 +120,9 @@ lb_network_name = {{ octavia_neutron_management_network_uuid }}
 # base_path = /var/lib/octavia
 # base_cert_dir = /var/lib/octavia/certs
 # Absolute path to a custom HAProxy template file
-# haproxy_template =
+{% if octavia_haproxy_amphora_template is defined %}
+haproxy_template = {{ octavia_haproxy_amphora_template }}
+{% endif %}
 # connection_max_retries = 300
 # connection_retry_interval = 5