Make sysctl configuration path configurable

Defaults to /etc/sysctl.conf to retain current behavior

Change-Id: Ie6a84a31f8281c0240519e92a217359234f1e1bb

defaults/main.yml

@@ -328,3 +328,5 @@ haproxy_static_files_default:
     condition: "{{ haproxy_security_txt_content is truthy }}"
 haproxy_static_files_extra: []
 haproxy_static_files: "{{ haproxy_static_files_default + haproxy_static_files_extra }}"
+
+haproxy_sysctl_file: "{{ openstack_sysctl_file | default('/etc/sysctl.conf') }}"

releasenotes/notes/haproxy_sysctl_location-e18310fd96597a6f.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Allow the definition of a custom sysctl config path through
+    `openstack_sysctl_file` and/or `haproxy_sysctl_file`.
+    Defaults to `/etc/sysctl.conf` to retain backwards compatibility.

tasks/haproxy_post_install.yml

@@ -18,6 +18,7 @@
     name: "{{ item }}"
     value: 1
     sysctl_set: true
+    sysctl_file: "{{ haproxy_sysctl_file }}"
     state: present
   when: haproxy_bind_on_non_local | bool
   with_items: