openstack juno 配置vmware（vcenter、vsphere)

官方配置文档：

http://docs.openstack.org/juno/config-reference/content/vmware.html

When you use the VMwareVCDriver (vCenter versions 5.1 and later) with OpenStack Compute, add the following VMware-specific configuration options to the nova.conf file: 1 2 3 4 5 6 7 8 9 [DEFAULT] compute_driver=vmwareapi.VMwareVCDriver [vmware] host_ip= host_username= host_password= cluster_name= datastore_regex=

将qcow2的镜像格式转化为vmdk：

$ qemu-img convert -f qcow2 ~/Downloads/trusty-server-cloudimg-amd64-disk1.img \ -O vmdk trusty-server-cloudimg-amd64-disk1.vmdk $ glance image-create --name trusty-cloud --is-public False \ --container-format bare --disk-format vmdk \ --property vmware_disktype="sparse" \ --property vmware_adaptertype="ide" < \ trusty-server-cloudimg-amd64-disk1.vmdk

将kvm 节点stop，让虚拟机调度到vcenter：

也可以通过zone来控制生成虚拟机到对应的节点：

官方juno对vmware的支持：

https://wiki.openstack.org/wiki/HypervisorSupportMatrix/Juno

<   HypervisorSupportMatrix

Feature	XenServer/XCP	KVM/libvirt on (x86)	QEMU/libvirt (x86)	LXC/libvirt	Xen/Libvirt	VMware	Hyper-V	Baremetal	Ironic	Docker	PowerKVM
Launch	✔	✔	✔	✔	✔ *(12)	✔	✔	✔	✔	✔	✔
Reboot	✔	✔	✔	✔	✔	✔	✔	✔	✔*(11)	✔	✔
Terminate	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔
Resize	✔	✔	✔		✔	✔	✔	* (15)	* (15)	✗	✔
Rescue	✔	✔	✔			✔		✗		✗	✔
Pause	✔	✔	✔		✔	✗	✔	* (15)	* (15)	✔	✔
Un-pause	✔	✔	✔		✔	✗	✔	* (15)	* (15)	✔	✔
Suspend	✔	✔	✔		✔	✔	✔	* (15)	* (15)	✗	✔
Resume	✔	✔	✔		✔	✔	✔	* (15)	* (15)	✗	✔
Inject Networking	✔*(1)(2)	✔*(1)	✔*(1)			✔*	✔	✗	✗
Inject File	✔	✔*	✔*				✗*(6)	✗	✗	✗
Serial Console Output	✔(4)	✔	✔	✗		✔	✔			✔
VNC Console	✔*	✔*	✔*	✔		✔	✗	✗	✗	✗
SPICE Console	✗	✔	✔			✗	✗	✗	✗	✗	✗
RDP Console	✗	✗	✗	✗	✗	✗	✔	✗	✗	✗
Attach Volume	✔	✔	✔	✗	✔	✔	✔			✗	✔
Detach Volume	✔	✔	✔	✗	✔	✔	✔			✗	✔
Live Migration	✔	✔	✔		✔	✗ (10)	✔	* (15)	* (15)	✗	✔
Snapshot	✔	✔	✔		✔ * (13)	✔	✔	* (15)	* (15)	✔	✔
iSCSI	✔	✔	✔			✔	✔				✔
iSCSI CHAP	✔	✔	✔				✔				✔
Fibre Channel	✗	✔	✔								✔
Set Admin Pass	✔	✗	✗			✗	✗*(6)	* (15)	* (15)	✗
Get Guest Info	✔	✔	✔			✔	✔			✔	✔
Get Host Info	✔	✔	✔			✔	✔			✔	✔
Glance Integration	✔	✔	✔		✔	✔	✔	✔	✔	✔	✔
Service Control	✔	✔	✔			✔	✔				✔
VLAN Networking	✔	✔	✔	✔	✔	✔	✗*(7)	✗	✗*(16)		✔
Flat Networking	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔
Security Groups	✔	✔	✔	✔	✔	✗*(9)	✗*(7)			✔	✔
Firewall Rules	✔	✔	✔		✔	✗ *(14)	✗*(7)	* (15)	* (15)		✔
Routing	✔	✔	✔		✔	✔	✗*(7)	✔	✔	✔
nova diagnostics	✔	✔	✔		✔	✔				✗	✔
Config Drive	✔	✔	✔	✔	✔	✔	✔	✗	✔	✗
Auto configure disk	✔	✗	✗	✗	✗	✗	✔			✗
Evacuate	✔	✔			✔		✔	✗	✗		✔
Volume swap	✗	✔	✔			✗	✗			✗	✔
Volume rate limiting	✗	✔	✔			✗	✗			✗	✔

1. Inject Networking only works with nova-network in Flat mode, and only with Debian/Ubuntu based virtual machines, and only at boot time
2. XenServer integration also supports using a guest agent to inject networking settings, at any time when a VM has the guest agent installed, through an admin API extension
3. (unused)
4. XenAPI support for serial console was added in Havana
5. (unsued)
6. Functionality provided by cloudbase-init for windows http://www.cloudbase.it/cloud-init-for-windows-instances/
7. Vlan and Routing is only supported on Hyper-V when using the Quantum / Neutron Hyper-V Agent; VlanManager mode is not supported with nova-network.
8. Support of Xen using Libvirt
9. Security Groups supported on VC/ESX Driver when using the Quantum NVP Plugin
10. https://bugs.launchpad.net/nova/+bug/1192192
11. Copy on write images are not suported (see bug https://bugs.launchpad.net/nova/+bug/1253571).
12. Only cold-snapshots are available.
13. https://bugs.launchpad.net/nova/+bug/1269448
14. Feature does not make sense for Baremetal / Ironic
15. Feature currently enabled by some Ironic drivers, but not all.

在juno版本中，不能支持的功能：

1、pause、unpause（vspherer没有此功能，注：  Suspend与Pause不一样，支持Suspend）

2、热迁移不支持

3、resize  不支持

具体更多关于热迁移，resize请参考博客（注：博客还未整理）：

热迁移功能不支持总结：

来看下vsphere的热迁移：

关于openstack底层对vmvare热迁移的支持： 

注此处的host不能为ip必须为vsphere里面的自增长hostname：

获取  vsphere里面的自增长hostname的函数为：

但是前端页面不支持，

以图为例讲解：

如下图有三个计算节点：其中conpute1、compute2底层驱动配置的为kvm驱动，comute3底层配置的为vmware驱动。 

1、从上图可以看出compute1、compute2对应的驱动为kvm，则它们的当前节点即为自己（即一个compute的kvm驱动driver对应管理自身主机）

2、compute3对应的驱动为vmware，那么它底层对应对接的为多个cluster（当然也可以只有一个cluster），然而一个cluster下面又挂接着多个host。

3、假若从compute1热迁移到compute2，走openstack正常迁移流程，更多详细请自行参考博客相关内容。

4、假若是想对compute3的虚拟机进行迁移，如果还是走openstack原有流程那么则虚拟机会从compute3迁移到compute1或者compute2，将vmdk的虚拟机迁移到kvm，目前来说会是失败的，

因为当前版本不支持openstack对vmware底层虚拟机的迁移（至少页面）。

5、从vsphere对compute3下面的虚拟机进行热迁移（vsphere挂了共享存储），是能够成功的。但是迁移只是对vsphere内部迁移有效，及虚拟机能够从host3、host4、host5之间互相迁移。

6、那么从openstack底层的驱动vmwareapi的driver驱动来看，有个dest参数，如果将dest设置为host3、host4、host5中的一个值，测试发现是能够将vsphere下面虚拟机进行迁移。因此说明

底层驱动是支持热迁移。页面和上层nova代码没有适配迁移（因为目前在上层nova及web中vsphere的host3、host4、host5是不可见的）。

因为要想适配vmwareapi的热迁移，需要对页面和nova上层代码进行修改，当然不能简简单单对页面进行修改，因为此处的目的host在调度时候，需要去判断host状态，

因此要想通过调度需要做改进，有两种方式实现：

1、判断如果是vmware的虚拟机进行迁移，则跳过调度中，对vmware目的host的判断，直接传递到底层

2、在数据库compute_nodes中增加vsphere中host的值，这样调度可以直接走（不建议此方法）

总结：无论哪种方法对openstack的代码侵入都比较大！

resize功能不支持总结：

具体细节在前文中博客有提到，  在此总结：

1、假若是compute1与compute2之间进行resize：

更多详细请参考博客  openstack ice resize 详解(一)： http://blog.csdn.net/tantexian/article/details/41444461

2、目前对vmwareapi驱动的虚拟机进行resize  时，正常应该吧finish_migration函数的rpc消息发给vmware驱动所在机器，实际确发送给了qemu

所在机器，因此就出现了问题。

3、初步判断原因为，当将虚拟机从host1 resize到host2   finish_migration 将在host1上面执行。当  使用了vmwareapi驱动时，按照kvm的resize逻辑，还是将  finish_migration 放到了kvm所在节点进行执行，因此出错了。正确情况为需要适配vmwareapi驱动  的resize，将  finish_migration     执行仍然放到自身节点上。

4、根据上述步骤3分析，由于resize代码逻辑太过复杂，就先强行修改rpc发送消息的目标节点到vmwareapi驱动所在节点，避过步骤三的错误。看到在vsphere底层对opentack 调用的resize流程，走的是克隆的方式，假若原始虚拟机为869a86b4-fdd8-49dd-8502-b2af1ec847b5在resize时候，则会克隆一个名为869a86b4-fdd8-49dd-8502-b2af1ec847b5-orig的虚拟机。当调用finish_migration时，则将原始虚拟机为869a86b4-fdd8-49dd-8502-b2af1ec847b5删除掉，再将869a86b4-fdd8-49dd-8502-b2af1ec847b5-orig修改为869a86b4-fdd8-49dd-8502-b2af1ec847b5。

总结：假若想让opentack适配vmware的resize，需要对nova的resize代码进行分析，工作量稍大（resize目前是opentack里面最复杂的逻辑，调用了创建虚拟机，迁移虚拟机等一系列opesntck的基础功能），其次修改适配的话对opentack原生代码侵入也较大。