Remove Mitaka Deprecated items

This commit removes the following Mitaka deprecated items from the nova
template (and their variable definitions, if any):

- the managers ```compute_manager``` and
  ```conductor.manager```
- ```security_group_api``` now that it's discovered with
  ```use_neutron```
- live/block_migration_flag config options
  (see also https://review.openstack.org/#/c/263436/)
- ```memcached_servers``` from [DEFAULT] (moved to [cache])

Change-Id: I13c503a0ab23c72f90462cbada50424edbaa71b8

defaults/main.yml

@@ -102,9 +102,6 @@ nova_virt_types:
     nova_compute_driver: nova.virt.ironic.IronicDriver
     nova_scheduler_host_manager: ironic_host_manager
     nova_reserved_host_memory_mb: 0
-    # NOTE(mrda): It's possible to use ironic.nova.compute.manager.ClusteredComputeManager
-    # here, but at the current time it's not recommended
-    nova_compute_manager: nova.compute.manager.ComputeManager
     nova_firewall_driver: nova.virt.firewall.NoopFirewallDriver
     nova_scheduler_use_baremetal_filters: True
     nova_scheduler_tracks_instance_changes: False
@@ -112,7 +109,6 @@ nova_virt_types:
     nova_compute_driver: libvirt.LibvirtDriver
     nova_scheduler_host_manager: host_manager
     nova_reserved_host_memory_mb: 2048
-    nova_compute_manager: nova.compute.manager.ComputeManager
     nova_firewall_driver: nova.virt.firewall.NoopFirewallDriver
     nova_scheduler_use_baremetal_filters: False
     nova_scheduler_tracks_instance_changes: True
@@ -120,7 +116,6 @@ nova_virt_types:
     nova_compute_driver: libvirt.LibvirtDriver
     nova_scheduler_host_manager: host_manager
     nova_reserved_host_memory_mb: 2048
-    nova_compute_manager: nova.compute.manager.ComputeManager
     nova_firewall_driver: nova.virt.firewall.NoopFirewallDriver
     nova_scheduler_use_baremetal_filters: False
     nova_scheduler_tracks_instance_changes: True
@@ -128,7 +123,6 @@ nova_virt_types:
     nova_compute_driver: nova_powervm.virt.powervm.driver.PowerVMDriver
     nova_scheduler_host_manager: host_manager
     nova_reserved_host_memory_mb: 8192
-    nova_compute_manager: nova.compute.manager.ComputeManager
     nova_firewall_driver: nova.virt.firewall.NoopFirewallDriver
     nova_scheduler_use_baremetal_filters: False
     nova_scheduler_tracks_instance_changes: True
@@ -218,7 +212,6 @@ nova_libvirt_inject_partition: -2
 nova_libvirt_inject_password: False
 nova_libvirt_disk_cachemodes: '{{ nova_libvirt_images_rbd_pool is defined | ternary("network=writeback", "") }}'
 nova_libvirt_hw_disk_discard: '{{ nova_libvirt_images_rbd_pool is defined | ternary("unmap", "ignore") }}'
-nova_libvirt_live_migration_flag: "VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE,VIR_MIGRATE_TUNNELLED"
 
 ## Nova conductor
 nova_conductor_program_name: nova-conductor

releasenotes/notes/mitaka-deprecations-72bec69c1395261d.yaml

@@ -0,0 +1,10 @@
+---
+other:
+  - |
+    ``nova_libvirt_live_migration_flag`` is now phased out.
+    Please create a nova configuration override with
+    ``live_migration_tunnelled: True`` if you want to force the flag
+    ``VIR_MIGRATE_TUNNELLED`` to libvirt. Nova "chooses a sensible
+    default" otherwise.
+  - |
+    ``nova_compute_manager`` is now phased out.

templates/nova.conf.j2

@@ -63,7 +63,6 @@ api_paste_config = /etc/nova/api-paste.ini
 allow_resize_to_same_host = True
 image_cache_manager_interval = {{ nova_image_cache_manager_interval }}
 resume_guests_state_on_host_boot = {{ nova_resume_guests_state_on_host_boot }}
-compute_manager = {{ nova_compute_manager }}
 
 {% if nova_console_user_ssl_cert is defined and nova_console_user_ssl_key is defined and inventory_hostname in groups['nova_console'] %}
 # Console SSL keys
@@ -95,7 +94,6 @@ firewall_driver = {{ nova_firewall_driver }}
 use_forwarded_for = {{ nova_network_services[nova_network_type]['use_forwarded_for'] | bool }}
 my_ip = {{ nova_management_address }}
 default_floating_pool = public
-security_group_api = neutron
 use_neutron = True
 
 # Authentication
@@ -118,9 +116,6 @@ force_config_drive = {{ nova_force_config_drive }}
 # Policy
 max_age = {{ nova_max_age }}
 
-# Common
-memcached_servers = {{ memcached_servers }}
-
 # Ceilometer notification configurations
 {% if nova_ceilometer_enabled %}
 instance_usage_audit = True
@@ -133,6 +128,12 @@ notify_on_state_change = vm_and_task_state
 driver = messagingv2
 {% endif %}
 
+# Cache
+[cache]
+enabled = true
+memcache_servers = {{ memcached_servers }}
+
+
 # Cinder
 [cinder]
 catalog_info = volumev2:cinderv2:internalURL
@@ -189,7 +190,6 @@ ovs_bridge = {{ nova_network_services[nova_network_type]['ovs_bridge'] }}
 
 [conductor]
 topic = conductor
-manager = nova.conductor.manager.ConductorManager
 workers = {{ nova_conductor_workers | default(api_threads) }}
 
 
@@ -277,7 +277,6 @@ images_type = rbd
 images_rbd_pool = {{ nova_libvirt_images_rbd_pool }}
 images_rbd_ceph_conf = /etc/ceph/ceph.conf
 {% endif %}
-live_migration_flag = "{{ nova_libvirt_live_migration_flag }}"
 live_migration_uri = "qemu+ssh://nova@%s/system?no_verify=1&keyfile={{ nova_system_home_folder }}/.ssh/id_rsa"
 hw_disk_discard = {{ nova_libvirt_hw_disk_discard }}
 disk_cachemodes = {{ nova_libvirt_disk_cachemodes }}