Octavia data plane adoption

Documentation for adopting the data plane, ie. amphorae,
specifically.

docs_user/assemblies/proc_adopting-octavia-amphorae.adoc

@@ -0,0 +1,25 @@
+[id="adopting-octavia-amphorae_{context}"]
+
+= Octavia data plane adoption
+
+== Clean up old neutron ports
+This deletes the old management port.
+
+----
+HM_PORTID="$(openstack port list --device-owner Octavia:health-mgr -f value -c ID)"
+openstack port delete "$HM_PORTID"
+----
+
+== Enabling the {loadbalancer_service} in OpenShift
+Run the following command in order to enable the {loadbalancer_service} CR
+and to finish the adoption process for {loadbalancer_service}.
+
+[source,bash]
+----
+oc patch openstackcontrolplane openstack --type=merge --patch '
+spec:
+  octavia:
+    enabled: true
+    template: {}
+'
+----

docs_user/modules/proc_adopting-the-loadbalancer-service.adoc

@@ -29,6 +29,7 @@ These commands convert the existing single CA configuration into a dual CA confi
 // == TODO: Other things
 // TODO
 
+<<<<<<< Updated upstream
 == Enabling the {loadbalancer_service} in OpenShift
 Run the following command in order to enable the {loadbalancer_service} CR.
 
@@ -41,3 +42,8 @@ spec:
     template: {}
 '
 ----
+
+== Final steps
+Octavia services must remain disabled until data plane adoption is finished in
+order to avoid amphora failovers before the data plane adoption steps were
+finished.