计算服务nova较之前的服务稍显复杂（但没有网络服务neutron复杂），它需要在控制节点和计算节点都安装
控制节点主要安装nova-api（nova主服务）、nova-scheduler（nova调度服务）、nova-conductor（nova数据库服务，提供数据库访问）、nova-novncproxy（nova的vnc服务，提供实例的控制台）等服务；
计算节点主要安装nova-compute（nova计算服务）。
本节将叙述在控制节点上安装nova的步骤，下一节再叙述在计算节点上的安装。
1. 创建数据库并授权
MariaDB [(none)]> CREATE DATABASE nova_api;
Query OK, 1 row affected (0.000 sec)
MariaDB [(none)]> CREATE DATABASE nova;
Query OK, 1 row affected (0.000 sec)
MariaDB [(none)]> CREATE DATABASE nova_cell0;
Query OK, 1 row affected (0.000 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova_api.* TO 'nova'@'localhost' IDENTIFIED BY 'NOVA_DBPASS';
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova_api.* TO 'nova'@'%' IDENTIFIED BY 'NOVA_DBPASS';
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'localhost' IDENTIFIED BY 'NOVA_DBPASS';
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' IDENTIFIED BY 'NOVA_DBPASS';
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova_cell0.* TO 'nova'@'localhost' IDENTIFIED BY 'NOVA_DBPASS';
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova_cell0.* TO 'nova'@'%' IDENTIFIED BY 'NOVA_DBPASS';
Query OK, 0 rows affected (0.001 sec)
2. 创建nova用户
[root@controller ~]# openstack user create --domain default --password NOVA_PASS nova
+---------------------+----------------------------------+
| Field | Value |
+---------------------+----------------------------------+
| domain_id | default |
| enabled | True |
| id | bcc9ca34f6694e0d827172fe04de23ba |
| name | nova |
| options | {} |
| password_expires_at | None |
+---------------------+----------------------------------+
3. 向nova用户添加admin角色
[root@controller ~]# openstack role add --project service --user nova admin
4. 创建nova服务实体
[root@controller ~]# openstack service create --name nova --description "OpenStack Compute" compute
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Compute |
| enabled | True |
| id | 5612dbfa3b85410ba6499d083da489a2 |
| name | nova |
| type | compute |
+-------------+----------------------------------+
5. 创建Compute API服务端点
[root@controller ~]# openstack endpoint create --region RegionOne compute public http://controller:8774/v2.1
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | b46f5cd0ec6949e18c1164a8bab20425 |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 5612dbfa3b85410ba6499d083da489a2 |
| service_name | nova |
| service_type | compute |
| url | http://controller:8774/v2.1 |
+--------------+----------------------------------+
[root@controller ~]# openstack endpoint create --region RegionOne compute internal http://controller:8774/v2.1
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | e2b46131bfa2454c84583143e753e9ec |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 5612dbfa3b85410ba6499d083da489a2 |
| service_name | nova |
| service_type | compute |
| url | http://controller:8774/v2.1 |
+--------------+----------------------------------+
[root@controller ~]# openstack endpoint create --region RegionOne compute admin http://controller:8774/v2.1
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | e61724aa243f4512b0511db17f241b46 |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 5612dbfa3b85410ba6499d083da489a2 |
| service_name | nova |
| service_type | compute |
| url | http://controller:8774/v2.1 |
+--------------+----------------------------------+
6. 安装软件包
[root@controller ~]# yum install openstack-nova-api openstack-nova-conductor openstack-nova-novncproxy openstack-nova-scheduler -y
7. 修改配置文件
cp -a /etc/nova/nova.conf{,.bak}
grep -Ev '^$|#' /etc/nova/nova.conf.bak > /etc/nova/nova.conf
openstack-config --set /etc/nova/nova.conf DEFAULT enabled_apis osapi_compute,metadata
openstack-config --set /etc/nova/nova.conf DEFAULT my_ip 10.0.0.11
openstack-config --set /etc/nova/nova.conf DEFAULT use_neutron true
openstack-config --set /etc/nova/nova.conf DEFAULT firewall_driver nova.virt.firewall.NoopFirewallDriver
openstack-config --set /etc/nova/nova.conf DEFAULT transport_url rabbit://openstack:RABBIT_PASS@controller
openstack-config --set /etc/nova/nova.conf api_database connection mysql+pymysql://nova:NOVA_DBPASS@controller/nova_api
openstack-config --set /etc/nova/nova.conf database connection mysql+pymysql://nova:NOVA_DBPASS@controller/nova
openstack-config --set /etc/nova/nova.conf placement_database connection mysql+pymysql://placement:PLACEMENT_DBPASS@controller/placement
openstack-config --set /etc/nova/nova.conf api auth_strategy keystone
openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_url http://controller:5000/v3
openstack-config --set /etc/nova/nova.conf keystone_authtoken memcached_servers controller:11211
openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_type password
openstack-config --set /etc/nova/nova.conf keystone_authtoken project_domain_name Default
openstack-config --set /etc/nova/nova.conf keystone_authtoken user_domain_name Default
openstack-config --set /etc/nova/nova.conf keystone_authtoken project_name service
openstack-config --set /etc/nova/nova.conf keystone_authtoken username nova
openstack-config --set /etc/nova/nova.conf keystone_authtoken password NOVA_PASS
openstack-config --set /etc/nova/nova.conf vnc enabled true
openstack-config --set /etc/nova/nova.conf vnc server_listen ' $my_ip'
openstack-config --set /etc/nova/nova.conf vnc server_proxyclient_address ' $my_ip'
openstack-config --set /etc/nova/nova.conf glance api_servers http://controller:9292
openstack-config --set /etc/nova/nova.conf oslo_concurrency lock_path /var/lib/nova/tmp
openstack-config --set /etc/nova/nova.conf placement region_name RegionOne
openstack-config --set /etc/nova/nova.conf placement project_domain_name Default
openstack-config --set /etc/nova/nova.conf placement project_name service
openstack-config --set /etc/nova/nova.conf placement auth_type password
openstack-config --set /etc/nova/nova.conf placement user_domain_name Default
openstack-config --set /etc/nova/nova.conf placement auth_url http://controller:5000/v3
openstack-config --set /etc/nova/nova.conf placement username placement
openstack-config --set /etc/nova/nova.conf placement password PLACEMENT_PASS
8. 填充nova-api数据库
[root@controller ~]# su -s /bin/sh -c "nova-manage api_db sync" nova
[root@controller ~]# su -s /bin/sh -c "nova-manage cell_v2 map_cell0" nova
[root@controller ~]# su -s /bin/sh -c "nova-manage cell_v2 create_cell --name=cell1 --verbose" nova
9da69415-6638-46d2-b35f-d5307f62348a
[root@controller ~]# su -s /bin/sh -c "nova-manage db sync" nova
/usr/lib/python2.7/site-packages/pymysql/cursors.py:170: Warning: (1831, u'Duplicate index `block_device_mapping_instance_uuid_virtual_name_device_name_idx`. This is deprecated and will be disallowed in a future release')
result = self._query(query)
/usr/lib/python2.7/site-packages/pymysql/cursors.py:170: Warning: (1831, u'Duplicate index `uniq_instances0uuid`. This is deprecated and will be disallowed in a future release')
result = self._query(query)
9. 数据库填充好之后，验证nova cell0和cell1是否正确注册：
[root@controller ~]# su -s /bin/sh -c "nova-manage cell_v2 list_cells" nova
+-------+--------------------------------------+------------------------------------------+-------------------------------------------------+----------+
| Name | UUID | Transport URL | Database Connection | Disabled |
+-------+--------------------------------------+------------------------------------------+-------------------------------------------------+----------+
| cell0 | 00000000-0000-0000-0000-000000000000 | none:/ | mysql+pymysql://nova:****@controller/nova_cell0 | False |
| cell1 | 9da69415-6638-46d2-b35f-d5307f62348a | rabbit://openstack:****@controller:5672/ | mysql+pymysql://nova:****@controller/nova | False |
+-------+--------------------------------------+------------------------------------------+-------------------------------------------------+----------+
10. 启动计算服务nova并将其配置为开机自启
[root@controller ~]# systemctl enable openstack-nova-api.service openstack-nova-scheduler.service openstack-nova-conductor.service openstack-nova-novncproxy.service
[root@controller ~]# systemctl start openstack-nova-api.service openstack-nova-scheduler.service openstack-nova-conductor.service openstack-nova-novncproxy.service
同样，使用netstat -tnlup查看端口情况，如出现8774和8775端口则表示nova服务正常启动。
至此，控制节点计算服务nova安装完成
