$ openstack --version
openstack 2.2.0
$ glance image-create --name cirros --file ./cirros-0.3.5-x86_64-disk.img --container-format bare --disk-format qcow2
1 要搭建的 Neutron 网络和虚拟机
image.png
2 Heat Orchestration Template (HOT)
创建一个文本文件 simple_net.yaml，其内容非常直观的描述了上图中的网络和虚拟机。
heat_template_version: 2015-04-30
description: Simple template to deploy a network with two VMs.
resources:
simple_net:
type: OS::Neutron::Net
properties:
name: GREEN
simple_subnet:
type: OS::Neutron::Subnet
properties:
network_id: { get_resource: simple_net }
name: 10_10_10
cidr: 10.10.10.0/24
VM1:
type: OS::Nova::Server
properties:
name: VM1
image: cirros
flavor: m1.small
networks:
- network: { get_resource: simple_net }
VM2:
type: OS::Nova::Server
properties:
name: VM2
image: cirros
flavor: m1.small
networks:
- network: { get_resource: simple_net }
3 创建 stack
$ heat stack-create -f simple_net.yaml xxx
$ heat stack-list
+--------------------------------------+------------+-----------------+----------------------------+
| id | stack_name | stack_status | creation_time |
+--------------------------------------+------------+-----------------+----------------------------+
| 56db34be-3336-4be1-8236-8b88539cb23e | xxx | CREATE_COMPLETE | 2017-11-13T02:38:46.962819 |
+--------------------------------------+------------+-----------------+----------------------------+
$ neutron net-list --name GREEN
+-------------------------------+-------+-------------------------------+
| id | name | subnets |
+-------------------------------+-------+-------------------------------+
| b7bf52b1-cbc2-41e4-a05b- | GREEN | 83c35c90-8fba- |
| 283f350be27d | | 4f31-9923-5f7e2922beb8 |
| | | 10.10.10.0/24 |
+-------------------------------+-------+-------------------------------+
$ nova list
+--------------------------------------+------+--------+------------+-------------+------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+------+--------+------------+-------------+------------------+
| e85586f7-95ef-4de5-867f-ef81892c02c9 | VM1 | ACTIVE | - | Running | GREEN=10.10.10.3 |
| 8d61338e-0f48-4aeb-939d-bc0cd21867ce | VM2 | ACTIVE | - | Running | GREEN=10.10.10.4 |
+--------------------------------------+------+--------+------------+-------------+------------------+
通过 OpenStack 的 dash board 可以登陆 VM1 的串口终端，从 VM1 可以 ping VM2。
4 总结
创建这个 Neutron 网络，子网，还有 Nova 虚拟机的过程可以一步一步通过不同的命令来创建。Stack 就是把这些独立的步骤捆绑在一起的一个概念。
