Openstack 實戰講解之-----05-控制節點Nova服務安裝配置

1、Nova介紹node

        Nova是openstack最先的兩塊模塊之一,另外一個是對象存儲swift。在openstack體系中一個叫作計算節點,一個叫作控制節點。這個主要和nova相關,咱們把安裝爲計算節點nova-compute,把除了nova-compute叫作控制節點。nova-compute是建立虛擬機的,只是建立虛擬機,全部的控制都在另外一臺上。mysql

1.1 功能和特色:linux

  • 實例生命週期的管理sql

  • 管理計算資源數據庫

  • 網絡和認證管理swift

  • REST風格的APIapi

  • 異步的一致性通訊bash

  • Hypervisor透明:支持Xen,XenServer/XCP,KVM,UML,VMware vSphere and Hyper-V網絡

1.2 Nova 雲架構包括如下主要組件:架構

  • API Server(nova-api)

  • Message Queue(rabbitmq server)

  • Compute Worker(nova-compute)

  • Network Controller(nova-network)

  • Volume Worker (Nova-volume)

  • Scheduler(nova-scheduler)

1.2.1 組件介紹

  • API:實現了RESTful API功能,是外部訪問Nova的惟一途徑。

接收外部的請求並經過Message Queue將請求發送給其餘的服務組件,同時也兼容EC2 API,因此也能夠用EC2的管理工具對nova進行平常管理。

  • Scheduler:模塊在OpenStack中負責決策虛擬機建立在那臺主機(計算節點)上。

決策一個虛擬機應該調度到某物理節點,須要分兩個步驟:

            1.過濾(Fliter) 首先獲取過未過濾的主機列表,根據過濾屬性,選擇服務條件的計算節點主機。

            2.計算權值(Weight) 通過主機過濾,須要對主機進行權值的計算,根據策略選擇相應的某一臺主機。

  • Cert:負責身份認證

  • Conductor:計算節點訪問數據庫的中間件

  •  Consoleauth:用於控制檯的受權驗證

  • Novncproxy:VNC代理

2、安裝配置Nova服務

2.1 修改配置文件

[root@linux-node1 ~]# grep -n '^[a-z]' /etc/nova/nova.conf 
14:auth_strategy=keystone  #keystone鏈接
2062:use_neutron=true   #啓用neutron網絡
3052:enabled_apis=osapi_compute,metadata #啓用計算和元數據
3265:firewall_driver=nova.virt.firewall.NoopFirewallDriver
3601:transport_url=rabbit://openstack:openstack@192.168.56.11
3662:connection=mysql://nova:nova@192.168.56.11/nova
4679:connection=mysql+pymysql://nova:nova@192.168.56.11/nova
4814:api_servers=
5429 [keystone_authtoken]下面添加 
5431:auth_uri = http://192.168.56.11:5000
5432:auth_url = http://192.168.56.11:35357
5433:memcached_servers = 192.168.56.11:11211
5434:auth_type = password
5435:project_domain_name = default
5436:user_domain_name = default
5437:project_name = service
5438:username = nova
5439:password = nova
6706:lock_path=/var/lib/nova/tmp
8385:vncserver_listen=0.0.0.0
8397:vncserver_proxyclient_address=192.168.56.11

2.2 同步數據庫

[root@linux-node1 ~]# su -s /bin/sh -c "nova-manageapi_db sync" nova
[root@linux-node1 ~]# su -s /bin/sh -c "nova-managedb sync" nova


2.3 數據庫驗證

 mysql -h192.168.56.11 -unova-pnova -e "use nova;show tables;"  #若是存在表就證實成功了

2.4 啓動nova

[root@linux-node1 ~]# systemctl enableopenstack-nova-api.service \
openstack-nova-consoleauth.serviceopenstack-nova-scheduler.service \
openstack-nova-conductor.service openstack-nova-novncproxy.service
[root@linux-node1 ~]# systemctlstart openstack-nova-api.service \
openstack-nova-consoleauth.serviceopenstack-nova-scheduler.service \
openstack-nova-conductor.serviceopenstack-nova-novncproxy.service

2.5 項目及端點配置

root@linux-node1 ~]# openstack service create --name nova \
> --description "OpenStack Compute" compute 
+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | OpenStack Compute                |
| enabled     | True                             |
| id          | 200e9f78a4654e0394eec200c4dab31d |
| name        | nova                             |
| type        | compute                          |
+-------------+----------------------------------+
[root@linux-node1 ~]# openstack endpoint create --region RegionOne \
> compute public http://192.168.56.11:8774/v2.1/%\(tenant_id\)s
+--------------+----------------------------------------------+
| Field        | Value                                        |
+--------------+----------------------------------------------+
| enabled      | True                                         |
| id           | dfb98d75fe7e44da898280d48e331a63             |
| interface    | public                                       |
| region       | RegionOne                                    |
| region_id    | RegionOne                                    |
| service_id   | 200e9f78a4654e0394eec200c4dab31d             |
| service_name | nova                                         |
| service_type | compute                                      |
| url          | http://192.168.56.11:8774/v2.1/%(tenant_id)s |
+--------------+----------------------------------------------+
[root@linux-node1 ~]# openstack endpoint create --region RegionOne \
> compute public http://192.168.56.11:8774/v2.1/%\(tenant_id\)s
+--------------+----------------------------------------------+
| Field        | Value                                        |
+--------------+----------------------------------------------+
| enabled      | True                                         |
| id           | a656fdf0dce34db39fdce5c3fd3d3e40             |
| interface    | public                                       |
| region       | RegionOne                                    |
| region_id    | RegionOne                                    |
| service_id   | 200e9f78a4654e0394eec200c4dab31d             |
| service_name | nova                                         |
| service_type | compute                                      |
| url          | http://192.168.56.11:8774/v2.1/%(tenant_id)s |
+--------------+----------------------------------------------+
[root@linux-node1 ~]#  openstack endpoint create --region RegionOne \
> compute admin http://192.168.56.11:8774/v2.1/%\(tenant_id\)s 
+--------------+----------------------------------------------+
| Field        | Value                                        |
+--------------+----------------------------------------------+
| enabled      | True                                         |
| id           | 85a0a9b5d4db449cab48b7c033aabac3             |
| interface    | admin                                        |
| region       | RegionOne                                    |
| region_id    | RegionOne                                    |
| service_id   | 200e9f78a4654e0394eec200c4dab31d             |
| service_name | nova                                         |
| service_type | compute                                      |
| url          | http://192.168.56.11:8774/v2.1/%(tenant_id)s |
+--------------+----------------------------------------------+

2.6 驗證nova鏡像

[root@linux-node1 ~]# openstack host list
+-------------+-------------+----------+
| Host Name   | Service     | Zone     |
+-------------+-------------+----------+
| linux-node1 | consoleauth | internal |
| linux-node1 | conductor   | internal |
| linux-node1 | scheduler   | internal |
+-------------+-------------+----------+
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