Add quorum queues support for service

This change implements and enables by default quorum support
for rabbitmq as well as providing default variables to globally tune
it's behaviour.

In order to ensure upgrade path and ability to switch back to HA queues
we change vhost names with removing leading `/`, as enabling quorum
requires to remove exchange which is tricky thing to do with running
services.

Change-Id: I2e3f464534bffe9edd9d969c8d6a24adce06c02c

defaults/main.yml

@@ -165,7 +165,13 @@ zun_oslomsg_rpc_servers: "{{ oslomsg_rpc_servers | default('127.0.0.1') }}"
 zun_oslomsg_rpc_port: "{{ oslomsg_rpc_port | default('5672') }}"
 zun_oslomsg_rpc_use_ssl: "{{ oslomsg_rpc_use_ssl | default(False) }}"
 zun_oslomsg_rpc_userid: zun
-zun_oslomsg_rpc_vhost: /zun
+# vhost name depends on value of oslomsg_rabbit_quorum_queues. In case quorum queues
+# are not used - vhost name will be prefixed with leading `/`.
+zun_oslomsg_rpc_vhost:
+  - name: /zun
+    state: "{{ zun_oslomsg_rabbit_quorum_queues | ternary('absent', 'present') }}"
+  - name: zun
+    state: "{{ zun_oslomsg_rabbit_quorum_queues | ternary('present', 'absent') }}"
 zun_oslomsg_rpc_ssl_version: "{{ oslomsg_rpc_ssl_version | default('TLSv1_2') }}"
 zun_oslomsg_rpc_ssl_ca_file: "{{ oslomsg_rpc_ssl_ca_file | default('') }}"
 
@@ -182,6 +188,11 @@ zun_oslomsg_notify_vhost: "{{ zun_oslomsg_rpc_vhost }}"
 zun_oslomsg_notify_ssl_version: "{{ oslomsg_notify_ssl_version | default('TLSv1_2') }}"
 zun_oslomsg_notify_ssl_ca_file: "{{ oslomsg_notify_ssl_ca_file | default('') }}"
 
+## RabbitMQ integration
+zun_oslomsg_rabbit_quorum_queues: "{{ oslomsg_rabbit_quorum_queues | default(True) }}"
+zun_oslomsg_rabbit_quorum_delivery_limit: "{{ oslomsg_rabbit_quorum_delivery_limit | default(0) }}"
+zun_oslomsg_rabbit_quorum_max_memory_bytes: "{{ oslomsg_rabbit_quorum_max_memory_bytes | default(0) }}"
+
 # If this is not set, then the playbook will try to guess it.
 # zun_virt_type: kvm
 

templates/zun.conf.j2

@@ -2,7 +2,7 @@
 debug = {{ debug | bool }}
 use_journal = true
 rpc_conn_pool_size = {{ zun_rpc_conn_pool_size }}
-transport_url = {{ zun_oslomsg_rpc_transport }}://{% for host in zun_oslomsg_rpc_servers.split(',') %}{{ zun_oslomsg_rpc_userid }}:{{ zun_oslomsg_rpc_password }}@{{ host }}:{{ zun_oslomsg_rpc_port }}{% if not loop.last %},{% else %}/{{ zun_oslomsg_rpc_vhost }}{% if zun_oslomsg_rpc_use_ssl | bool %}?ssl=1&ssl_version={{ zun_oslomsg_rpc_ssl_version }}&ssl_ca_file={{ zun_oslomsg_rpc_ssl_ca_file }}{% else %}?ssl=0{% endif %}{% endif %}{% endfor %}
+transport_url = {{ zun_oslomsg_rpc_transport }}://{% for host in zun_oslomsg_rpc_servers.split(',') %}{{ zun_oslomsg_rpc_userid }}:{{ zun_oslomsg_rpc_password }}@{{ host }}:{{ zun_oslomsg_rpc_port }}{% if not loop.last %},{% else %}/{{ _zun_oslomsg_rpc_vhost_conf }}{% if zun_oslomsg_rpc_use_ssl | bool %}?ssl=1&ssl_version={{ zun_oslomsg_rpc_ssl_version }}&ssl_ca_file={{ zun_oslomsg_rpc_ssl_ca_file }}{% else %}?ssl=0{% endif %}{% endif %}{% endfor %}
 
 use_sandbox = true
 image_driver_list = glance,docker
@@ -89,7 +89,7 @@ lock_path = {{ zun_lock_dir }}/{{ zun_system_slice_name }}
 
 [oslo_messaging_notifications]
 driver = {{ (zun_ceilometer_enabled | bool) | ternary('messagingv2', 'noop') }}
-transport_url = {{ zun_oslomsg_notify_transport }}://{% for host in zun_oslomsg_notify_servers.split(',') %}{{ zun_oslomsg_notify_userid }}:{{ zun_oslomsg_notify_password }}@{{ host }}:{{ zun_oslomsg_notify_port }}{% if not loop.last %},{% else %}/{{ zun_oslomsg_notify_vhost }}{% if zun_oslomsg_notify_use_ssl | bool %}?ssl=1&ssl_version={{ zun_oslomsg_notify_ssl_version }}&ssl_ca_file={{ zun_oslomsg_notify_ssl_ca_file }}{% else %}?ssl=0{% endif %}{% endif %}{% endfor %}
+transport_url = {{ zun_oslomsg_notify_transport }}://{% for host in zun_oslomsg_notify_servers.split(',') %}{{ zun_oslomsg_notify_userid }}:{{ zun_oslomsg_notify_password }}@{{ host }}:{{ zun_oslomsg_notify_port }}{% if not loop.last %},{% else %}/{{ _zun_oslomsg_notify_vhost_conf }}{% if zun_oslomsg_notify_use_ssl | bool %}?ssl=1&ssl_version={{ zun_oslomsg_notify_ssl_version }}&ssl_ca_file={{ zun_oslomsg_notify_ssl_ca_file }}{% else %}?ssl=0{% endif %}{% endif %}{% endfor %}
 {% if zun_ceilometer_enabled or zun_designate_enabled %}
 {% set notification_topics = [] %}
 {% if zun_ceilometer_enabled %}
@@ -104,7 +104,9 @@ topics = {{ notification_topics | join(',') }}
 
 [oslo_messaging_rabbit]
 ssl = {{ zun_oslomsg_notify_use_ssl | bool }}
-
+rabbit_quorum_queue = {{ zun_oslomsg_rabbit_quorum_queues }}
+rabbit_quorum_delivery_limit = {{ zun_oslomsg_rabbit_quorum_delivery_limit }}
+rabbit_quorum_max_memory_bytes = {{ zun_oslomsg_rabbit_quorum_max_memory_bytes }}
 
 [placement_client]
 endpoint_type = {{ zun_service_endpoint_type }}

vars/main.yml

@@ -13,6 +13,17 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+_zun_oslomsg_rpc_vhost_conf: >-
+  {{
+    (zun_oslomsg_rpc_vhost is string) | ternary(
+      zun_oslomsg_rpc_vhost, zun_oslomsg_rpc_vhost | selectattr('state', 'eq', 'present') | map(attribute='name') | first)
+  }}
+_zun_oslomsg_notify_vhost_conf: >-
+  {{
+    (zun_oslomsg_notify_vhost is string) | ternary(
+      zun_oslomsg_notify_vhost, zun_oslomsg_notify_vhost | selectattr('state', 'eq', 'present') | map(attribute='name') | first)
+  }}
+
 #
 # Compile a list of the services on a host based on whether
 # the host is in the host group and the service is enabled.