Add upgrade_tasks for HAproxy

Include the tasks that are necessary when upgrading a non-containerized
undercloud to a containerized undercloud for example.

Change-Id: I1e281711f1543659e7ec043747857b756beda3e1

docker/services/haproxy.yaml

@@ -87,6 +87,10 @@ parameters:
     default: false
     description: Whether to run config management (e.g. Puppet) in debug mode.
     type: boolean
+  UpgradeRemoveUnusedPackages:
+    default: false
+    description: Remove package if the service is being disabled during upgrade
+    type: boolean
 
 conditions:
   puppet_debug_enabled: {get_param: ConfigDebug}
@@ -255,6 +259,33 @@ outputs:
                       - null
               environment:
                 - KOLLA_CONFIG_STRATEGY=COPY_ALWAYS
+      upgrade_tasks:
+        - when: step|int == 0
+          tags: common
+          block:
+            - name: Check if HAproxy is deployed
+              command: systemctl is-enabled --quiet haproxy
+              ignore_errors: True
+              register: haproxy_enabled_result
+            - name: Set fact haproxy_enabled
+              set_fact:
+                haproxy_enabled: "{{ haproxy_enabled_result.rc == 0 }}"
+            - name: "PreUpgrade step0,validation: Check service HAproxy is running"
+              command: systemctl is-active --quiet haproxy
+              tags: validation
+              when: haproxy_enabled|bool
+        - when: step|int == 2
+          block:
+            - name: Stop and disable haproxy service
+              when: haproxy_enabled|bool
+              service: name=haproxy state=stopped enabled=no
+            - name: Set fact for removal of HAproxy package
+              set_fact:
+                remove_haproxy_package: {get_param: UpgradeRemoveUnusedPackages}
+            - name: Remove HAproxy package if operator requests it
+              package: name=haproxy state=removed
+              ignore_errors: True
+              when: remove_haproxy_package|bool
       host_prep_tasks:
         - {get_attr: [HAProxyBase, role_data, host_prep_tasks]}
         - name: create persistent directories