OpenStack-M版(Mitaka)搭建基于（Centos7.2）+++五、Openstack计算服务（nova）上

五、Openstack计算服务（nova）上

简单介绍：

nova控制节点上主要有五个组件：nova-api、nova-conductor、nova-consoleauth、nova-novncproxy、nova-scheduler

nova-api:接收和响应客户的API调用

nova-conductor:作用于``nova-compute``服务与数据库之间，因为nova-compute不会直接访问数据库而是交给它

nova-consoleauth:负责对访问虚拟机控制台提供token认证

nova-novncproxy:基于WEB浏览器的VNC访问提供一个代理，用于访问正在运行的实例

nova-scheduler:虚拟机调度服务负责绝对在哪个计算安装虚拟机

安装

nova安装在控制节点的部分（nova-api、nova-conductor、nova-consoleauth、nova-novncproxy、nova-scheduler）

进入SQL创建nova数据库并授予权限

mysql -uroot -p

CREATE DATABASE nova_api;GRANT ALL PRIVILEGES ON nova_api.* TO 'nova'@'localhost' \  IDENTIFIED BY '123456';GRANT ALL PRIVILEGES ON nova_api.* TO 'nova'@'%' \  IDENTIFIED BY '123456';

CREATE DATABASE nova;GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'localhost' \  IDENTIFIED BY '123456';GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' \  IDENTIFIED BY '123456';

创建nova用户

需要管理员权限

. admin-openrc

openstack user create --domain default --password-prompt nova

添加 admin 角色到 nova 用户和 service 项目上

openstack role add --project service --user nova admin

创建``nova``服务实体

openstack service create --name nova --description "OpenStack Compute" compute

创建计算服务的 API 端点 创建时括号前加 "\"  转义字符 ,如：\ （tenant_id\ ）s

openstack endpoint create --region RegionOne compute public http://controller:8774/v2.1/%(tenant_id)sopenstack endpoint create --region RegionOne compute internal http://controller:8774/v2.1/%(tenant_id)sopenstack endpoint create --region RegionOne compute admin http://controller:8774/v2.1/%(tenant_id)s

安装nova软件包

yum install openstack-nova-api \openstack-nova-conductor \openstack-nova-console \openstack-nova-novncproxy \openstack-nova-scheduler

修改/etc/nova/nova.conf文件

vi /etc/nova/nova.conf[DEFAULT]enabled_apis = osapi_compute,metadata启用计算和元数据APIrpc_backend = rabbit启用消息队列auth_strategy = keystone启用keystone认证my_ip = 192.168.100.10使用控制节点管理接口ipuse_neutron = True启用网络服务firewall_driver = nova.virt.firewall.NoopFirewallDriver配置数据库连接[api_database]connection = mysql+pymysql://nova:123456@controller/nova_api[database]connection = mysql+pymysql://nova:123456@controller/nova配置消息队列[oslo_messaging_rabbit] rabbit_host = controllerrabbit_userid = openstackrabbit_password = 123456配置认证服务访问[keystone_authtoken]auth_uri = http://controller:5000auth_url = http://controller:35357memcached_servers = controller:11211auth_type = passwordproject_domain_name = defaultuser_domain_name = defaultproject_name = serviceusername = novapassword = 123456配置VNC代理使用控制节点的管理接口IP地址[vnc]vncserver_listen = $my_ipvncserver_proxyclient_address = $my_ip配置镜像服务 API 的位置[glance]api_servers = http://controller:9292配置锁路径[oslo_concurrency]lock_path = /var/lib/nova/tmp

同步compute数据库

su -s /bin/sh -c "nova-manage api_db sync" novasu -s /bin/sh -c "nova-manage db sync" nova

查看是否有数据

mysql -uroot -puse nova;show tables;use nova_api;show tables;

如果没有数据检查[database]和[api_database]下connection=是否正确，如果没有问题可能是赋予nova数据库权限时有误，重新赋予。

启动服务

systemctl enable openstack-nova-api.service \  openstack-nova-consoleauth.service openstack-nova-scheduler.service \  openstack-nova-conductor.service openstack-nova-novncproxy.servicesystemctl start openstack-nova-api.service \  openstack-nova-consoleauth.service openstack-nova-scheduler.service \  openstack-nova-conductor.service openstack-nova-novncproxy.service

如果你启动失败请检查配置文件，一般是敲错了