openstack-5computer(计算服务)
Compute service overview
nova 是 openstack 最早的组件之一，nova 分为控制节点和计算节点，计算节点通过 nova
computer 进行虚拟机创建，通过 libvirt 调用 kvm 创建虚拟机，nova 之间通信通过 rabbitMQ
队列进行通信，其组件和功能如下：
API：负责接收和响应外部请求。
Scheduler：负责调度虚拟机所在的物理机。
Conductor：计算节点访问数据库的中间件。
Consoleauth：用于控制台的授权认证。
Novncproxy：VNC 代理，用于显示虚拟机操作终端。
官 方 部 署 文 档 ： https://docs.openstack.org/ocata/zh_CN/install-guide-rdo/common/get-started-compute.html
Nova-API 的功能：
Nova-api 组件实现了 restful API 的功能，接收和响应来自最终用户的计算 API 请求，接收外
部的请求并通过 message queue 将请求发动给其他服务组件，同时也兼容 EC2 API，所以也
可以使用 EC2 的管理工具对 nova 进行日常管理。
nova scheduler：
nova scheduler 模块在 openstack 中的作用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，需要分为两个步骤：
过滤（filter），过滤出可以创建虚拟机的主机
计算权值（weight），根据权重大进行分配，默认根据资源可用空间进行权重排序
安装并配置控制节点
先决条件
CREATE DATABASE nova_api;
CREATE DATABASE nova;
CREATE DATABASE nova_cell0;
GRANT ALL PRIVILEGES ON nova_api.* TO 'nova'@'%' IDENTIFIED BY 'novapass';
GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' IDENTIFIED BY 'novapass';
GRANT ALL PRIVILEGES ON nova_cell0.* TO 'nova'@'%' IDENTIFIED BY 'novapass';创建 nova 用户
[root@controller1 ~]# openstack user create --domain default --password-prompt nova
User Password:
Repeat User Password:
+---------------------+----------------------------------+
| Field | Value |
+---------------------+----------------------------------+
| domain_id | 0a8f301960df4c76bea868524707efe8 |
| enabled | True |
| id | ed1cadb4e6bb472b9a5dd331c449d993 |
| name | nova |
| options | {} |
| password_expires_at | None |
+---------------------+----------------------------------+给 nova 用户添加 admin 角色
openstack role add --project service --user nova admin创建 nova 服务并注册
创建 nova 服务
[root@controller1 ~]# openstack service create --name nova --description "OpenStack Compute" compute
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Compute |
| enabled | True |
| id | d60f94f3e6fe4b5d9205d159a66631c7 |
| name | nova |
| type | compute |
+-------------+----------------------------------+创建公共端点
[root@controller1 ~]# openstack endpoint create --region RegionOne compute public http://192.168.10.233:8774/v2.1
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 5c36c94914ea460694609149a3ad3667 |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | d60f94f3e6fe4b5d9205d159a66631c7 |
| service_name | nova |
| service_type | compute |
| url | http://192.168.10.233:8774/v2.1 |
+--------------+----------------------------------+创建私有端点
[root@controller1 ~]# openstack endpoint create --region RegionOne compute internal http://192.168.10.233:8774/v2.1
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 61bdc8e2d3934920b28323ff60cbad97 |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | d60f94f3e6fe4b5d9205d159a66631c7 |
| service_name | nova |
| service_type | compute |
| url | http://192.168.10.233:8774/v2.1 |
+--------------+----------------------------------+创建管理端点
[root@controller1 ~]# openstack endpoint create --region RegionOne compute admin http://192.168.10.233:8774/v2.1
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 4ff439ff3feb41cbb63cc6d78f29901e |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | d60f94f3e6fe4b5d9205d159a66631c7 |
| service_name | nova |
| service_type | compute |
| url | http://192.168.10.233:8774/v2.1 |
+--------------+----------------------------------+创建一个Placement服务用户
[root@controller1 ~]# openstack user create --domain default --password-prompt placement
User Password:
Repeat User Password:
+---------------------+----------------------------------+
| Field | Value |
+---------------------+----------------------------------+
| domain_id | 0a8f301960df4c76bea868524707efe8 |
| enabled | True |
| id | b89dd2bfd4a3413aa30889080fdbbf83 |
| name | placement |
| options | {} |
| password_expires_at | None |
+---------------------+----------------------------------+使用admin角色将Placement用户添加到服务项目：
openstack role add --project service --user placement admin在服务目录中创建Placement APl条目：
openstack service create --name placement --description "Placement API" placement创建Placement APl服务端点
openstack endpoint create --region RegionOne placement public http://192.168.10.233:8778
openstack endpoint create --region RegionOne placement internal http://192.168.10.233:8778
openstack endpoint create --region RegionOne placement admin http://192.168.10.233:8778查看
[root@controller1 ~]# openstack user list
+----------------------------------+-----------+
| ID | Name |
+----------------------------------+-----------+
| 7903947d3df2430a9de170282b17a123 | glance |
| b89dd2bfd4a3413aa30889080fdbbf83 | placement |
| ed1cadb4e6bb472b9a5dd331c449d993 | nova |
| f7e61b8a40b7490694e8082dc6ecf9bc | admin |
+----------------------------------+-----------+
[root@controller1 ~]# openstack role list
+----------------------------------+-------+
| ID | Name |
+----------------------------------+-------+
| 11f7dc0b9df1443ab4a2ed688b10926f | admin |
+----------------------------------+-------+
[root@controller1 ~]# openstack service list
+----------------------------------+-----------+-----------+
| ID | Name | Type |
+----------------------------------+-----------+-----------+
| 1d282d7b7b57405a98aac596f42f173d | glance | image |
| 88ae0d08128842279750cdc3dfb00cff | keystone | identity |
| d60f94f3e6fe4b5d9205d159a66631c7 | nova | compute |
| ec224c7267c844d5a0404f2b5444a0d0 | placement | placement |
+----------------------------------+-----------+-----------+
[root@controller1 ~]# openstack endpoint list
+-------------------------------+-----------+--------------+--------------+---------+-----------+--------------------------------+
| ID | Region | Service Name | Service Type | Enabled | Interface | URL |
+-------------------------------+-----------+--------------+--------------+---------+-----------+--------------------------------+
| 36d59ff6ca284344bfa4990d5c7bc | RegionOne | glance | image | True | admin | http://192.168.10.233:9292 |
| 071 | | | | | | |
| 3d1bc5df827c48de9df3772ae00da | RegionOne | glance | image | True | public | http://192.168.10.233:9292 |
| cf4 | | | | | | |
| 4862d7d814f04fc08b0d5c5073a12 | RegionOne | keystone | identity | True | admin | http://192.168.10.233:35357/v3 |
| 09a | | | | | | |
| 4ff439ff3feb41cbb63cc6d78f299 | RegionOne | nova | compute | True | admin | http://192.168.10.233:8774/v2. |
| 01e | | | | | | 1 |
| 5c36c94914ea460694609149a3ad3 | RegionOne | nova | compute | True | public | http://192.168.10.233:8774/v2. |
| 667 | | | | | | 1 |
| 61bdc8e2d3934920b28323ff60cba | RegionOne | nova | compute | True | internal | http://192.168.10.233:8774/v2. |
| d97 | | | | | | 1 |
| 6b6ecf1ca488400784b0f9e35f5c4 | RegionOne | keystone | identity | True | internal | http://192.168.10.233:5000/v3 |
| b7e | | | | | | |
| c19451bc06ff4852b148fa70cd1cc | RegionOne | placement | placement | True | internal | http://192.168.10.233:8778 |
| 79b | | | | | | |
| c433b9336e35442a935f49f93544b | RegionOne | placement | placement | True | admin | http://192.168.10.233:8778 |
| 113 | | | | | | |
| dc9f039ed9ec4ed286b76ddf7ebb8 | RegionOne | glance | image | True | internal | http://192.168.10.233:9292 |
| a81 | | | | | | |
| e0ecf07f27494ac1b1fadc11e1162 | RegionOne | keystone | identity | True | public | http://192.168.10.233:5000/v3 |
| b53 | | | | | | |
| ef3a7de574354f2da2f6d2eaaf17a | RegionOne | placement | placement | True | public | http://192.168.10.233:8778 |
| 7b9 | | | | | | |
+-------------------------------+-----------+--------------+--------------+---------+-----------+--------------------------------+
[root@controller1 ~]# openstack project list
+----------------------------------+---------+
| ID | Name |
+----------------------------------+---------+
| 14c7c0b953754e0d9f30d4973e3e369d | admin |
| ff71bd18ddc842599845c08a7ef7fbca | service |
+----------------------------------+---------+安全并配置组件
安装软件包
yum install openstack-nova-api openstack-nova-conductor openstack-nova-console openstack-nova-novncproxy openstack-nova-scheduler openstack-nova-placement-api编辑/etc/nova/nova.conf文件并完成下面的操作：
在[DEFAULT]部分，只启用计算和元数据API：
[DEFAULT]
enabled_apis = osapi_compute,metadata在[api_database]和[database]部分，配置数据库的连接：
[api_database]
connection = mysql+pymysql://nova:novapass@192.168.10.233/nova_api
[database]
connection = mysql+pymysql://nova:novapass@192.168.10.233/nova在[DEFAULT]部分，配置RabbitMQ消息队列访问权限：
[DEFAULT]
transport_url = rabbit://openstack:openstackpass@192.168.10.233在[api]和[keystone-authtoken]部分中，配置身份服务访问：
[api]
auth_strategy = keystone
[keystone_authtoken]
auth_uri = http://192.168.10.233:5000
auth_url = http://192.168.10.233:35357
memcached_servers = 192.168.10.233:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = nova在 [DEFAULT] 部分，配置my_ip 来使用控制节点的管理接口的IP 地址。
[DEFAULT]
my_ip = 192.168.10.201在 [DEFAULT]部分，启用网络服务支持：
[DEFAULT]
use_neutron = True
firewall_driver = nova.virt.firewall.NoopFirewallDriver默认情况下，计算服务使用内置的防火墙服务。由于网络服务包含了防火墙服务，你必须使用nova.virt.firewall.NoopFirewallDriver防火墙服务来禁用掉计算服务内置的防火墙服务
在[vnc]部分，配置VNC代理使用控制节点的管理接口IP地址 ：
[vnc]
enabled = true
vncserver_listen = $my_ip
vncserver_proxyclient_address = $my_ip在 [glance] 区域，配置镜像服务 API 的位置：
[glance]
api_servers = http://192.168.10.233:9292在 [oslo_concurrency] 部分，配置锁路径：
[oslo_concurrency]
lock_path = /var/lib/nova/tmp在[placement]部分中，配置Placement API：
[placement]
os_region_name = RegionOne
project_domain_name = Default
project_name = service
auth_type = password
user_domain_name = Default
auth_url = http://192.168.10.233:35357/v3
username = placement
password = placement由于 packaging bug 打包错误，您必须通过添加以下配置来启用对Placement API的访问
/etc/httpd/conf.d/00-nova-placement-api.conf
<Directory /usr/bin>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
</Directory>重新httpd服务
systemctl restart httpd填充nova-api数据库：
su -s /bin/sh -c "nova-manage api_db sync" nova注册cell0数据库：
su -s /bin/sh -c "nova-manage cell_v2 map_cell0" nova创建cell1单元格：
# su -s /bin/sh -c "nova-manage cell_v2 create_cell --name=cell1 --verbose" nova
29f2d858-08b5-41d9-9545-77cfe7704818填充新星数据库：
su -s /bin/sh -c "nova-manage db sync" nova确认nova cel10和cel11已正确注册：
[root@controller1 ~]# nova-manage cell_v2 list_cells
+-------+--------------------------------------+
| Name | UUID |
+-------+--------------------------------------+
| cell0 | 00000000-0000-0000-0000-000000000000 |
| cell1 | 29f2d858-08b5-41d9-9545-77cfe7704818 |
+-------+--------------------------------------+完成安装
启动 Compute 服务并将其设置为随系统启动：
systemctl enable openstack-nova-api.service
openstack-nova-consoleauth.service openstack-nova-scheduler.service
openstack-nova-conductor.service openstack-nova-novncproxy.service
systemctl restart openstack-nova-api.service
openstack-nova-consoleauth.service openstack-nova-scheduler.service
openstack-nova-conductor.service openstack-nova-novncproxy.service[root@controller1 ~]# nova service-list
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+
| Id | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+
| 1 | nova-scheduler | controller1 | internal | enabled | up | 2019-09-11T05:29:28.000000 | - |
| 2 | nova-consoleauth | controller1 | internal | enabled | up | 2019-09-11T05:29:28.000000 | - |
| 3 | nova-conductor | controller1 | internal | enabled | up | 2019-09-11T05:29:28.000000 | - |
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+安装和配置计算节点
yum install openstack-nova-compute安全并配置组件部署 nova 计算节点
编辑/etc/nova/nova.conf文件并完成下面的操作：
在[DEFAULT]部分，只启用计算和元数据API：
[DEFAULT]
enabled_apis = osapi_compute,metadata在[DEFAULT]部分，配置RabbitMQ消息队列访问权限：
[DEFAULT]
transport_url = rabbit://openstack:openstackpass@192.168.10.233用你在 “RabbitMQ” 中为 “openstack” 选择的密码替换 “RABBIT_PASS”。
在 [api_database] 和 [database] 部分，配置数据库的连接：
[api_database]
connection = mysql+pymysql://nova:novapass@192.168.10.233/nova_api
[database]
connection = mysql+pymysql://nova:novapass@192.168.10.233/nova在[api]和[keystone_authtoken]部分中，配置身份服务访问：
[api]
auth_strategy = keystone
[keystone_authtoken]
auth_uri = http://192.168.10.233:5000
auth_url = http://192.168.10.233:35357
memcached_servers = 192.168.10.233:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = nova使用你在身份认证服务中设置的nova 用户的密码替换NOVA_PASS。
在 [DEFAULT] 部分，配置 my_ip 选项：
[DEFAULT]
my_ip = 192.168.10.203将其中的 MANAGEMENT_INTERFACE_IP_ADDRESS 替换为计算节点上的管理网络接口的IP 地址，例如 :ref:example architecture <overview-example-architectures>中所示的第一个节点 10.0.0.31 。
在 [DEFAULT]部分，启用网络服务支持：
[DEFAULT]
use_neutron = True
firewall_driver = nova.virt.firewall.NoopFirewallDriver缺省情况下，Compute 使用内置的防火墙服务。由于 Networking 包含了防火墙服务，所以你必须通过使用 nova.virt.firewall.NoopFirewallDriver 来去除 Compute 内置的防火墙服务。
在[vnc]部分，启用并配置远程控制台访问：
[vnc]
enabled = True
vncserver_listen = 0.0.0.0
vncserver_proxyclient_address = $my_ip
novncproxy_base_url = http://192.168.10.233:6080/vnc_auto.html服务器组件监听所有的 IP 地址，而代理组件仅仅监听计算节点管理网络接口的 IP 地址。基本的 URL 指示您可以使用 web 浏览器访问位于该计算节点上实例的远程控制台的位置。
如果你运行浏览器的主机无法解析192.168.10.233 主机名，你可以将 192.168.10.233替换为你控制节点管理网络的IP地址。
在 [glance] 区域，配置镜像服务 API 的位置：
[glance]
api_servers = http://192.168.10.233:9292
在 [oslo_concurrency] 部分，配置锁路径：
[oslo_concurrency]
lock_path = /var/lib/nova/tmp在[placement]部分中，配置Placement API：
[placement]
os_region_name = RegionOne
project_domain_name = Default
project_name = service
auth_type = password
user_domain_name = Default
auth_url = http://192.168.10.233:35357/v3
username = placement
password = placement完成安装
确认计算节点是否支持硬件加速：
egrep -c '(vmx|svm)' /proc/cpuinfo如果这个命令返回了 one or greater 的值，那么你的计算节点支持硬件加速且不需要额外的配置。
如果这个命令返回了 zero 值，那么你的计算节点不支持硬件加速。你必须配置 libvirt 来使用 QEMU 去代替 KVM
在 /etc/nova/nova.conf 文件的 [libvirt] 区域做出如下的编辑：
[libvirt]
virt_type = qemu启动 nova 计算服务并设置为开机启动：
systemctl enable libvirtd.service openstack-nova-compute.service
systemctl restart libvirtd.service openstack-nova-compute.service主动发现计算节点：
#使用命令发现：
source admin-openstack.sh
su -s /bin/sh -c "nova-manage cell_v2 discover_hosts --verbose" nova
[root@controller1 ~]# openstack hypervisor list
+----+---------------------+-----------------+----------------+-------+
| ID | Hypervisor Hostname | Hypervisor Type | Host IP | State |
+----+---------------------+-----------------+----------------+-------+
| 1 | computer1 | QEMU | 192.168.10.203 | up |
+----+---------------------+-----------------+----------------+-------+如果还看不到计算节点
nova-status upgrade check
nova-manage cell_v2 simple_cell_setup
openstack hypervisor list添加新计算节点时，必须运行nova-manage cell_v2 discover_hosts
在控制器节点上注册那些新的计算节点。或者，您可以在中设置适当的间隔/etc/nova/nova.conf
#定期主动发现：
[scheduler]
discover_hosts_in_cells_interval = 300修改完配置重新服务
systemctl restart openstack-nova-api.service
openstack-nova-consoleauth.service openstack-nova-scheduler.service
openstack-nova-conductor.service openstack-nova-novncproxy.service验证操作
验证计算节点：
[root@controller1 ~]# nova host-list
+-------------+-------------+----------+
| host_name | service | zone |
+-------------+-------------+----------+
| controller1 | scheduler | internal |
| controller1 | consoleauth | internal |
| controller1 | conductor | internal |
| computer1 | compute | nova |
+-------------+-------------+----------+列出服务组件，以验证是否成功启动并注册了每个进程
[root@controller1 ~]# nova service-list
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+
| Id | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+
| 1 | nova-scheduler | controller1 | internal | enabled | up | 2019-09-11T06:08:19.000000 | - |
| 2 | nova-consoleauth | controller1 | internal | enabled | up | 2019-09-11T06:08:19.000000 | - |
| 3 | nova-conductor | controller1 | internal | enabled | up | 2019-09-11T06:08:20.000000 | - |
| 8 | nova-compute | computer1 | nova | enabled | up | 2019-09-11T06:08:21.000000 | - |
+----+------------------+-------------+----------+---------+-------+----------------------------+-----------------+#列出 keystone 服务中的端点，以验证 keystone 的连通性。
[root@controller1 ~]# openstack catalog list
+-----------+-----------+---------------------------------------------+
| Name | Type | Endpoints |
+-----------+-----------+---------------------------------------------+
| glance | image | RegionOne |
| | | admin: http://192.168.10.233:9292 |
| | | RegionOne |
| | | public: http://192.168.10.233:9292 |
| | | RegionOne |
| | | internal: http://192.168.10.233:9292 |
| | | |
| keystone | identity | RegionOne |
| | | admin: http://192.168.10.233:35357/v3 |
| | | RegionOne |
| | | internal: http://192.168.10.233:5000/v3 |
| | | RegionOne |
| | | public: http://192.168.10.233:5000/v3 |
| | | |
| nova | compute | RegionOne |
| | | admin: http://192.168.10.233:8774/v2.1 |
| | | RegionOne |
| | | public: http://192.168.10.233:8774/v2.1 |
| | | RegionOne |
| | | internal: http://192.168.10.233:8774/v2.1 |
| | | |
| placement | placement | RegionOne |
| | | internal: http://192.168.10.233:8778 |
| | | RegionOne |
| | | admin: http://192.168.10.233:8778 |
| | | RegionOne |
| | | public: http://192.168.10.233:8778 |
| | | |
+-----------+-----------+---------------------------------------------+列出Image服务中的图像以验证与Image服务的连接：
[root@controller1 ~]# nova image-list
WARNING: Command image-list is deprecated and will be removed after Nova 15.0.0 is released. Use python-glanceclient or openstackclient instead
+--------------------------------------+--------+--------+--------+
| ID | Name | Status | Server |
+--------------------------------------+--------+--------+--------+
| cac9811d-6590-4648-b1a0-6eda2e8e799e | cirros | ACTIVE | |
+--------------------------------------+--------+--------+--------+
[root@controller1 ~]# openstack image list
+--------------------------------------+--------+--------+
| ID | Name | Status |
+--------------------------------------+--------+--------+
| cac9811d-6590-4648-b1a0-6eda2e8e799e | cirros | active |
+--------------------------------------+--------+--------+列出服务组件是否成功注册
[root@controller1 ~]# openstack compute service list
+----+------------------+-------------+----------+---------+-------+----------------------------+
| ID | Binary | Host | Zone | Status | State | Updated At |
+----+------------------+-------------+----------+---------+-------+----------------------------+
| 1 | nova-scheduler | controller1 | internal | enabled | up | 2019-09-11T06:09:49.000000 |
| 2 | nova-consoleauth | controller1 | internal | enabled | up | 2019-09-11T06:09:49.000000 |
| 3 | nova-conductor | controller1 | internal | enabled | up | 2019-09-11T06:09:50.000000 |
| 8 | nova-compute | computer1 | nova | enabled | up | 2019-09-11T06:09:51.000000 |
+----+------------------+-------------+----------+---------+-------+----------------------------+检查 cells 和 placement API 是否工作正常
[root@controller1 ~]# nova-status upgrade check
+---------------------------+
| Upgrade Check Results |
+---------------------------+
| Check: Cells v2 |
| Result: Success |
| Details: None |
+---------------------------+
| Check: Placement API |
| Result: Success |
| Details: None |
+---------------------------+
| Check: Resource Providers |
| Result: Success |
| Details: None |
+---------------------------+如果出现重复的节点请参考
https://blog.csdn.net/ai74le/article/details/88293965