openstack N版——创建云主机

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一.启动实例

1.1 已准备服务介绍

  • MySql:为各个服务提供数据存储。
  • RabbitMQ:为各个服务之间通信提供交通枢纽。
  • keystone:为各个服务之间通信提供认证和服务注册。
  • Glance:为虚拟机提供镜像管理。
  • Nova:为虚拟机提供计算资源。
  • Neutron:为虚拟机提供网络资源。

1.2 网络(flat)

1.2.1创建虚拟网络
1 #share 允许所有项目使用虚拟网络
2 [root@linux-node1 ~]# openstack network create  --share \\
3 --provider-physical-network public \\
4 --provider-network-type flat public
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | UP                                   |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2017-03-01T03:10:38Z                 |
| description               |                                      |
| headers                   |                                      |
| id                        | 0cdd6694-d53d-4f85-b04a-bc3b6dfa6cbc |
| ipv4_address_scope        | None                                 |
| ipv6_address_scope        | None                                 |
| mtu                       | 1500                                 |
| name                      | public                               |
| port_security_enabled     | True                                 |
| project_id                | d24a61dd3ecb43cb9e8a5f6539c6a2bb     |
| project_id                | d24a61dd3ecb43cb9e8a5f6539c6a2bb     |
| provider:network_type     | flat                                 |
| provider:physical_network | public                               |
| provider:segmentation_id  | None                                 |
| revision_number           | 3                                    |
| router:external           | Internal                             |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      | []                                   |
| updated_at                | 2017-03-01T03:10:38Z                 |
+---------------------------+--------------------------------------+
1.2.2查看已创建网络
1 #新版本命令
2 [root@linux-node1 ~]# openstack network list
3 #老版本命令
4 [root@linux-node1 ~]# neutron net-list
5 #结果都是一样的
+--------------------------------------+--------+---------+
| ID                                   | Name   | Subnets |
+--------------------------------------+--------+---------+
| 0cdd6694-d53d-4f85-b04a-bc3b6dfa6cbc | public |         |
+--------------------------------------+--------+---------+
1.2.3创建子网
 1 #创建子网
 2 [root@linux-node1 ~]# openstack subnet create --network public \\
 3 --allocation-pool start=192.168.56.100,end=192.168.56.200 \\
 4 --dns-nameserver 192.168.56.2 --gateway 192.168.56.2 \\
 5 --subnet-range 192.168.56.0/24 public-subnet
 6 #注解
 7 public:是之前配置文件中flat_networks自定义的名称
 8 start:dhcp起始地址
 9 end:dhcp终止地址
10 nameserver:DNS
11 gateway:网关
12 subnet:网段/子网
13 public-subnet:子网名称
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| allocation_pools  | 192.168.56.100-192.168.56.200        |
| cidr              | 192.168.56.0/24                      |
| created_at        | 2017-03-01T03:12:36Z                 |
| description       |                                      |
| dns_nameservers   | 192.168.56.2                         |
| enable_dhcp       | True                                 |
| gateway_ip        | 192.168.56.2                         |
| headers           |                                      |
| host_routes       |                                      |
| id                | 3b307841-211f-4c8e-91f5-a9f051bb1248 |
| ip_version        | 4                                    |
| ipv6_address_mode | None                                 |
| ipv6_ra_mode      | None                                 |
| name              | public-subnet                        |
| network_id        | 0cdd6694-d53d-4f85-b04a-bc3b6dfa6cbc |
| project_id        | d24a61dd3ecb43cb9e8a5f6539c6a2bb     |
| project_id        | d24a61dd3ecb43cb9e8a5f6539c6a2bb     |
| revision_number   | 2                                    |
| service_types     | []                                   |
| subnetpool_id     | None                                 |
| updated_at        | 2017-03-01T03:12:36Z                 |
+-------------------+--------------------------------------+
1.2.4检查子网
1 #新版本命令
2 [root@linux-node1 ~]# openstack subnet list
+--------------------------------------+---------------+--------------------------------------+-----------------+
| ID                                   | Name          | Network                              | Subnet          |
+--------------------------------------+---------------+--------------------------------------+-----------------+
| 3b307841-211f-4c8e-91f5-a9f051bb1248 | public-subnet | 0cdd6694-d53d-4f85-b04a-bc3b6dfa6cbc | 192.168.56.0/24 |
+--------------------------------------+---------------+--------------------------------------+-----------------+
3 #老版本命令 4 [root@linux-node1 ~]# neutron subnet-list
+--------------------------------------+---------------+-----------------+------------------------------------------------------+
| id                                   | name          | cidr            | allocation_pools                                     |
+--------------------------------------+---------------+-----------------+------------------------------------------------------+
| 3b307841-211f-4c8e-91f5-a9f051bb1248 | public-subnet | 192.168.56.0/24 | {"start": "192.168.56.100", "end": "192.168.56.200"} |
+--------------------------------------+---------------+-----------------+------------------------------------------------------+

1.3创建云主机类型

1 #先创建一个小的云主机类型,给官方提供镜像做测试
2 [root@linux-node1 ~]# openstack flavor create --id 0 --vcpus 1 --ram 64 --disk 1 m1.nano
3 #注解
4 id:主机类型ID
5 vcpus:虚拟cpu数量
6 ram:虚拟内存大小(MB)
7 disk:虚拟磁盘大小(GB)
8 m1.nano:主机类型名称(可随便更改)
+----------------------------+---------+
| Field                      | Value   |
+----------------------------+---------+
| OS-FLV-DISABLED:disabled   | False   |
| OS-FLV-EXT-DATA:ephemeral  | 0       |
| disk                       | 1       |
| id                         | 0       |
| name                       | m1.nano |
| os-flavor-access:is_public | True    |
| properties                 |         |
| ram                        | 64      |
| rxtx_factor                | 1.0     |
| swap                       |         |
| vcpus                      | 1       |
+----------------------------+---------+
1.3.1查看云主机类型
1 [root@linux-node1 ~]# openstack flavor list
+----+---------+-----+------+-----------+-------+-----------+
| ID | Name    | RAM | Disk | Ephemeral | VCPUs | Is Public |
+----+---------+-----+------+-----------+-------+-----------+
| 0  | m1.nano |  64 |    1 |         0 |     1 | True      |
+----+---------+-----+------+-----------+-------+-----------+

1.4创建秘钥对

1 #创建ssh的秘钥对
2 [root@linux-node1 ~]# ssh-keygen -q -N ""
3 #直接敲回车
4 Enter file in which to save the key (/root/.ssh/id_rsa): 
5 #用openstack使用此秘钥对
6 [root@linux-node1 ~]# openstack keypair create --public-key ~/.ssh/id_rsa.pub mykey
+-------------+-------------------------------------------------+
| Field       | Value                                           |
+-------------+-------------------------------------------------+
| fingerprint | f9:81:41:cc:48:f0:69:37:34:a6:52:08:6f:60:28:14 |
| name        | mykey                                           |
| user_id     | 45b086bdc6b746c5b0bfd62f779fe6a5                |
+-------------+-------------------------------------------------+
1.4.1查看键值对
1 [root@linux-node1 ~]#  openstack keypair list
+-------+-------------------------------------------------+
| Name  | Fingerprint                                     |
+-------+-------------------------------------------------+
| mykey | f9:81:41:cc:48:f0:69:37:34:a6:52:08:6f:60:28:14 |
+-------+-------------------------------------------------+

1.5创建安全组规则

1 #开启icmp协议,允许ping
2 [root@linux-node1 ~]# openstack security group rule create --proto icmp default
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2017-03-01T03:49:22Z                 |
| description       |                                      |
| direction         | ingress                              |
| ethertype         | IPv4                                 |
| headers           |                                      |
| id                | 044c66be-4db9-4f8c-8b6f-59c02c0c962c |
| port_range_max    | None                                 |
| port_range_min    | None                                 |
| project_id        | d24a61dd3ecb43cb9e8a5f6539c6a2bb     |
| project_id        | d24a61dd3ecb43cb9e8a5f6539c6a2bb     |
| protocol          | icmp                                 |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 1                                    |
| security_group_id | a9c0f076-3e8a-4344-ad7b-e94b51798116 |
| updated_at        | 2017-03-01T03:49:22Z                 |
+-------------------+--------------------------------------+
3 #开启22端口,允许ssh 4 [root@linux-node1 ~]# openstack security group rule create --proto tcp --dst-port 22 default
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2017-03-01T03:50:33Z                 |
| description       |                                      |
| direction         | ingress                              |
| ethertype         | IPv4                                 |
| headers           |                                      |
| id                | 6b48884c-dfc5-444c-8fb2-4ec157945e4e |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| project_id        | d24a61dd3ecb43cb9e8a5f6539c6a2bb     |
| project_id        | d24a61dd3ecb43cb9e8a5f6539c6a2bb     |
| protocol          | tcp                                  |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 1                                    |
| security_group_id | a9c0f076-3e8a-4344-ad7b-e94b51798116 |
| updated_at        | 2017-03-01T03:50:33Z                 |
+-------------------+--------------------------------------+
1.5.1查看安全组规则
1 [root@linux-node1 ~]# openstack security group list
+--------------------------------------+---------+------------------------+----------------------------------+
| ID                                   | Name    | Description            | Project                          |
+--------------------------------------+---------+------------------------+----------------------------------+
| a9c0f076-3e8a-4344-ad7b-e94b51798116 | default | Default security group | d24a61dd3ecb43cb9e8a5f6539c6a2bb |
+--------------------------------------+---------+------------------------+----------------------------------+

1.6启动虚拟机

 1 #启动之前首先要查看网络ID并记下
 2 [root@linux-node1 ~]# openstack network list
+--------------------------------------+--------+--------------------------------------+
| ID                                   | Name   | Subnets                              |
+--------------------------------------+--------+--------------------------------------+
| 0cdd6694-d53d-4f85-b04a-bc3b6dfa6cbc | public | 3b307841-211f-4c8e-91f5-a9f051bb1248 |
+--------------------------------------+--------+--------------------------------------+
3 #创建虚拟机,并启动 4 [root@linux-node1 ~]# openstack server create --flavor m1.nano --image cirros \\ 5 --nic net-id=0cdd6694-d53d-4f85-b04a-bc3b6dfa6cbc --security-group default \\ 6 --key-name mykey demo-instance 7 #注:如果只有一个网络,则不需要填写net-id,openstack会默认选择 8 #注解 9 flavor:云主机类型名称 10 image:镜像名称 11 nic net-id:网络ID 12 security-group:安全组 13 key-name:秘钥对 14 demo-instance:云主机名称
1.6.1查看云主机
1 [root@linux-node1 ~]# openstack server list
+--------------------------------------+---------------+--------+-----------------------+------------+
| ID                                   | Name          | Status | Networks              | Image Name |
+--------------------------------------+---------------+--------+-----------------------+------------+
| 24202ab8-9f13-4555-b8e3-6ff799223e67 | demo-instance | ACTIVE | public=192.168.56.110 | cirros     |
+--------------------------------------+---------------+--------+-----------------------+------------+

1.7获取VNC的url

1 [root@linux-node1 ~]# openstack console url show demo-instance
+-------+------------------------------------------------------------------------------------+
| Field | Value                                                                              |
+-------+------------------------------------------------------------------------------------+
| type  | novnc                                                                              |
| url   | http://192.168.56.11:6080/vnc_auto.html?token=844e8352-a2ca-4c3f-8690-753529d59b80 |
+-------+------------------------------------------------------------------------------------+
1.71访问VNC的url

打开浏览器输入:http://192.168.56.11:6080/vnc_auto.html?token=844e8352-a2ca-4c3f-8690-753529d59b80即可访问

注:以上操作,完全可以在dashboard上创建

二.创建云主机流程介绍

2.1创建云主机步骤

第一步:dashboard或者client带着用户名和密码请求keystone服务

第二步:keystone服务验证用户名和密码,验证成功后返回token给dashboard或者client

第三步:dashboard或者client带着keystone服务返回的token请求nova-api

第四步:nova-api带着token访问keystone服务验证token是否正确

第五步:keystone验证token正确后,返回结果给nova-api

第六步:nova-api将要创建的虚拟机资源信息写入DB

第七步:nova-api将要创建虚拟机的请求写入rabbitMQ消息队列,建立沟通枢纽

第八步:nova-scheduler发现消息队列中的创建虚拟机信息后访问DB

第九步:nova-scheduler从DB中获取到创建虚拟机所需资源并且计算,调度,决定将虚拟机创建在哪个计算节点上

第十步:将计算结果返回给消息队列

第十一步:nova-compute从消息队列中获取nova-scheduler计算的结果

第十二步:nova-compute通过nova-conductor(中间件)与DB交互来获取要创建的虚拟机所需要的资源信息

第十三步:nova-compute带着token去请求glance获取镜像资源,glance会将token交给keystone服务验证

第十四步:如果token验证成功,则将glance的镜像资源交给nova-compute

第十五步:nova-compute带着token去请求neutron获取网络资源,neutron会将token交给keystone服务验证

第十六步:如果token验证成功,则将neutron的网络资源交给nova-compute

第十七步:nova-compute带着token去请求cinder获取存储资源,cinder会将token交给keystone服务验证

第十八步:如果token验证成功,则将cinder的存储资源交给nova-compute

所有步骤都操作成功后,nova-compute就会将虚拟机创建在scheduler计算后的节点上。

2.2创建云主机流程图

 

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