openstack计算服务nova
一、环境准备1、虚拟机准备
IP地址 主机名 操作系统
192.168.56.11 linux-node1 CentOS7
192.168.56.12 linux-node2 CentOS7
其中，linux-node1当作控制节点
linux-node2当作计算节点
二、nova服务
我们把除了nova-compute组件之外的节点都安装在一台主机上，称为控制节点；把nava-compute安装在另外一台主机上，称为计算节点；计算节点是用来创建虚拟机的
nova有很多服务
- API：负责接收和响应外部请求，支持OpenStack API,EC2 API
- Cert:负责身份认证EC2
- Schedule:用于云主机调度
- Conductor：计算节点访问数据的中间件
- Consoleauth：用于控制台的授权验证
- Novncproxy:VNC代理
scheduler模块在openstack中的作用就是决策虚拟机创建在哪个主机（计算节点）上。
决策一个虚拟机应该调度到某物理节点，需要分两个步骤：
- 过滤（Filter）
- 计算权值（Weight）
1、nova安装
在控制节点上
# yum install -y openstack-nova-api openstack-nova-cert \
openstack-nova-conductor openstack-nova-console \
openstack-nova-novncproxy openstack-nova-scheduler
2、配置
先决条件
（1）创建nova和nova-api数据库
已在安装mariadb后创建完成
（2）获得 admin 凭证来获取只有管理员能执行的命令的访问权限
创建用户
（3）修改nova.conf
配置数据库连接
vim /etc/nova/nova.conf
connection=mysql+pymysql://nova:nova@192.168.56.11/nova_api
connection=mysql+pymysql://nova:nova@192.168.56.11/nova
3、同步数据库
# su -s /bin/sh -c "nova-manage api_db sync" nova
# su -s /bin/sh -c "nova-manage db sync" nova
验证是否同步成功
mysql -h 192.168.56.11 -unova -pnova -e "use nova;show tables;"
mysql -h 192.168.56.11 -unova -pnova -e "use nova_api;show tables;"
4、配置keystone
vim /etc/nova/nova.conf
#打开注释，认证方式选择keystone
auth_strategy=keystone
#在下添加
auth_uri = http://192.168.56.11:5000
auth_url = http://192.168.56.11:35357
memcached_servers = 192.168.56.11:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = nova
5、配置rabbitmq
# grep '^r' /etc/nova/nova.conf
rabbit_host=192.168.56.11
rabbit_port=5672
rabbit_userid=openstack
rabbit_password=openstack
rpc_backend=rabbit
6、修改nova自身的配置
vim /etc/nova/nova.conf
#在部分，只使用计算和元数据API
enabled_apis=osapi_compute,metadata
#和网络相关，使用neutron
use_neutron=true
#使用nova的防火墙，并且关闭
firewall_driver=nova.virt.firewall.NoopFirewallDriver
#在部分，配置VNC代理使用控制节点的管理接口IP地址
vncserver_listen=192.168.56.11
vncserver_proxyclient_address=192.168.56.11
#在 区域，配置镜像服务 API 的位置：
api_servers=http://192.168.56.11:9292
#在 部分，配置锁路径：
lock_path=/var/lib/nova/tmp
7、启动nova
# systemctl enable openstack-nova-api.service openstack-nova-consoleauth.service openstack-nova-scheduler.service openstack-nova-conductor.service openstack-nova-novncproxy.service
Created symlink from /etc/systemd/system/multi-user.target.wants/openstack-nova-api.service to /usr/lib/systemd/system/openstack-nova-api.service.
Created symlink from /etc/systemd/system/multi-user.target.wants/openstack-nova-consoleauth.service to /usr/lib/systemd/system/openstack-nova-consoleauth.service.
Created symlink from /etc/systemd/system/multi-user.target.wants/openstack-nova-scheduler.service to /usr/lib/systemd/system/openstack-nova-scheduler.service.
Created symlink from /etc/systemd/system/multi-user.target.wants/openstack-nova-conductor.service to /usr/lib/systemd/system/openstack-nova-conductor.service.
Created symlink from /etc/systemd/system/multi-user.target.wants/openstack-nova-novncproxy.service to /usr/lib/systemd/system/openstack-nova-novncproxy.service.
# systemctl start openstack-nova-api.service openstack-nova-consoleauth.service openstack-nova-scheduler.service openstack-nova-conductor.service openstack-nova-novncproxy.service
8、在keystone上做服务注册
在创建之前，要先执行环境变量脚本
# source admin-openstack.sh
再创建nova服务实体
# openstack service create --name nova --description "OpenStack Compute" compute
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Compute |
| enabled | True |
| id | 4d3ec9545a5549598a0b7e458b8f7bcd |
| name | nova |
| type | compute |
+-------------+----------------------------------+
创建镜像服务的API endpoint
# openstack endpoint create --region RegionOne compute public http://192.168.56.11:8774/v2.1/%\(tenant_id\)s
+--------------+----------------------------------------------+
| Field | Value |
+--------------+----------------------------------------------+
| enabled | True |
| id | b3e8878ea8964039897bb56367364484 |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 4d3ec9545a5549598a0b7e458b8f7bcd |
| service_name | nova |
| service_type | compute |
| url | http://192.168.56.11:8774/v2.1/%(tenant_id)s |
+--------------+----------------------------------------------+
# openstack endpoint create --region RegionOne compute admin http://192.168.56.11:8774/v2.1/%\(tenant_id\)s
+--------------+----------------------------------------------+
| Field | Value |
+--------------+----------------------------------------------+
| enabled | True |
| id | 59b33390ae474bc5bd04fb8bc3affa90 |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 4d3ec9545a5549598a0b7e458b8f7bcd |
| service_name | nova |
| service_type | compute |
| url | http://192.168.56.11:8774/v2.1/%(tenant_id)s |
+--------------+----------------------------------------------+
# openstack endpoint create --region RegionOne compute internal http://192.168.56.11:8774/v2.1/%\(tenant_id\)s
+--------------+----------------------------------------------+
| Field | Value |
+--------------+----------------------------------------------+
| enabled | True |
| id | 0d8ed49cdded436bb2faadc133017049 |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 4d3ec9545a5549598a0b7e458b8f7bcd |
| service_name | nova |
| service_type | compute |
| url | http://192.168.56.11:8774/v2.1/%(tenant_id)s |
+--------------+----------------------------------------------+
验证控制节点是否部署成功
# openstack host list
+-------------+-------------+----------+
| Host Name | Service | Zone |
+-------------+-------------+----------+
| linux-node1 | consoleauth | internal |
| linux-node1 | conductor | internal |
| linux-node1 | scheduler | internal |
+-------------+-------------+----------+
三、nova-compute
1、基础软件包安装
（1）安装EPEL源
rpm -ivh http://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm
（2）安装OpenStack仓库
yum install -y centos-release-openstack-mitaka
（3）安装OpenStack客户端
yum install -y python-openstackclient
（4）安装OpenStack SELinux管理包
yum install -y openstack-selinux
2、nova-compute配置
# grep '^' /etc/nova/nova.conf
enabled_apis=osapi_compute,metadata
auth_strategy=keystone
firewall_driver=nova.virt.firewall.NoopFirewallDriver
use_neutron=true
rpc_backend=rabbit
api_servers=http://192.168.56.11:9292
auth_uri = http://192.168.56.11:5000
auth_url = http://192.168.56.11:35357
memcached_servers = 192.168.56.11:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = nova
virt_type=kvm
lock_path=/var/lib/nova/tmp
rabbit_host=192.168.56.11
rabbit_port=5672
rabbit_userid=openstack
rabbit_password=openstack
enabled=true #启用并配置远程控制台访问
vncserver_listen=0.0.0.0
vncserver_proxyclient_address=192.168.56.12
novncproxy_base_url=http://192.168.56.11:6080/vnc_auto.html
3、启动计算服务及其依赖，并设置开机启动
systemctl enable libvirtd.service openstack-nova-compute.service
systemctl start libvirtd.service openstack-nova-compute.service
4、验证计算服务是否配置成功
在控制节点上执行
# source admin-openstack.sh
# openstack host list
+-------------+-------------+----------+
| Host Name | Service | Zone |
+-------------+-------------+----------+
| linux-node1 | consoleauth | internal |
| linux-node1 | conductor | internal |
| linux-node1 | scheduler | internal |
| linux-node2 | compute | nova |
+-------------+-------------+----------+
可以看到在计算节点上有compute服务，则说明配置成功
# nova service-list
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+
| Id | Binary | Host | Zone | Status| State | Updated_at | Disabled Reason |
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+
| 1| nova-consoleauth | linux-node1 | internal | enabled | up | 2016-10-28T13:22:42.000000 | - |
| 2| nova-conductor | linux-node1 | internal | enabled | up | 2016-10-28T13:22:49.000000 | - |
| 3| nova-scheduler | linux-node1 | internal | enabled | up | 2016-10-28T13:22:42.000000 | - |
| 6| nova-compute | linux-node2 | nova | enabled | up | 2016-10-28T13:22:44.000000 | - |
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+
如果能列出我们已经上传的镜像，则证明nova与glance之间配置成功
# nova image-list
+--------------------------------------+--------+--------+--------+
| ID | Name | Status | Server |
+--------------------------------------+--------+--------+--------+
| 29d99654-ba91-4d04-8808-e1b8d16861fb | cirros | ACTIVE | |
+--------------------------------------+--------+--------+--------+
页:
[1]