Add support for the nova_api db

This change adds in the nova_api db migration that has to happen
within mitaka. This is a new required DB though the DB entry has
existed since Kilo.

Change:
  * The change brings in two new DB create commands as well as an
    additional task to execute the nova api_db sync.
  * Additionally, new DB tunings were added to the defaults file.

Re-Implementation-Of: https://review.openstack.org/#/c/274932/9
UpgradeImpact
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>
Change-Id: If63b541bfaf91333ac5963d391e6058ac8254eec

defaults/main.yml

@@ -53,6 +53,13 @@ nova_db_max_overflow: 10
 nova_db_max_pool_size: 120
 nova_db_pool_timeout: 30
 
+## DB API
+nova_api_galera_user: nova_api
+nova_api_galera_database: nova_api
+nova_api_db_max_overflow: 10
+nova_api_db_max_pool_size: 120
+nova_api_db_pool_timeout: 30
+
 ## RabbitMQ info
 nova_rabbitmq_userid: nova
 nova_rabbitmq_vhost: /nova

tasks/nova_db_setup.yml

@@ -39,6 +39,32 @@
   tags:
     - nova-db-setup
 
+- name: Create API DB for service
+  mysql_db:
+    login_user: "{{ galera_root_user }}"
+    login_password: "{{ galera_root_password }}"
+    login_host: "{{ nova_api_galera_address }}"
+    name: "{{ nova_api_galera_database }}"
+    state: "present"
+  tags:
+    - nova-db-setup
+
+- name: Grant access to the API DB for the service
+  mysql_user:
+    login_user: "{{ galera_root_user }}"
+    login_password: "{{ galera_root_password }}"
+    login_host: "{{ nova_api_galera_address }}"
+    name: "{{ nova_api_galera_user }}"
+    password: "{{ nova_api_container_mysql_password }}"
+    host: "{{ item }}"
+    state: "present"
+    priv: "{{ nova_api_galera_database }}.*:ALL"
+  with_items:
+    - "localhost"
+    - "%"
+  tags:
+    - nova-db-setup
+
 - name: Perform a Nova DB sync
   command: "{{ nova_bin }}/nova-manage db sync"
   become: yes
@@ -47,3 +73,12 @@
     - nova-db-setup
     - nova-setup
     - nova-command-bin
+
+- name: Perform a Nova API DB sync
+  command: "{{ nova_bin }}/nova-manage api_db sync"
+  become: yes
+  become_user: "{{ nova_system_user_name }}"
+  tags:
+    - nova-db-setup
+    - nova-setup
+    - nova-command-bin

templates/nova.conf.j2

@@ -208,12 +208,19 @@ memcache_secret_key = {{ memcached_encryption_key }}
 check_revocations_for_cached = False
 
 
-{% if inventory_hostname not in groups['nova_compute'] %}
+{% if inventory_hostname in (groups['nova_conductor'] + groups['nova_scheduler'] + groups['nova_api_os_compute'] + groups['nova_api_metadata']) %}
 [database]
 connection = mysql+pymysql://{{ nova_galera_user }}:{{ nova_container_mysql_password }}@{{ nova_galera_address }}/{{ nova_galera_database }}?charset=utf8
 max_overflow = {{ nova_db_max_overflow }}
 max_pool_size = {{ nova_db_max_pool_size }}
 pool_timeout = {{ nova_db_pool_timeout }}
+
+
+[api_database]
+connection = mysql+pymysql://{{ nova_api_galera_user }}:{{ nova_api_container_mysql_password }}@{{ nova_api_galera_address }}/{{ nova_api_galera_database }}?charset=utf8
+max_overflow = {{ nova_api_db_max_overflow }}
+max_pool_size = {{ nova_api_db_max_pool_size }}
+pool_timeout = {{ nova_api_db_pool_timeout }}
 {% endif %}