vdswitch分布式虚拟交换机配置文件在存储中的位置
Firstly some information around a vDS switch. Each vDS switch has a UUID in the format : "6a de 0e 50 80 32 76 68-e0 72 fd 00 c3 23 52 92" (as an example). When you look inside a datastore you will sometimes (Will explain just now on when) a .dvsData folder. If you look in there you will see 1 or more of these numbers. Each number correspond to a vDS switch that is used by the ESXi host.
So some rules around these files :
- The .dvsData folder is only created if you have a VM on that datastore that is attached to a vDS. Thus if there is only VM's that is attached to a vSwitch on a datastore there will not be a .dvsData folder. Also only the datastore that holds the .vmx config file will have the .dvsData folder.
- Inside the .dvsData folder there is a UUID number for each vDS switch.
- Inside the UUID folder is a smaller file that is a number. This number corresponds to the ethernetx.dvs.portId inside the .vmx file of a VM. Below we can see that ethernet0.dvs.portId=10.
ethernet0.dvs.switchId = "6a de 0e 50 80 32 76 68-e0 72 fd 00 c3 23 52 92"
ethernet0.dvs.portId = "10"
ethernet0.dvs.portgroupId = "dvportgroup-208"
ethernet0.dvs.connectionId = "177280995"
There is some config files that also important:
- /etc/vmware/ dvsdata.db
- Updated by hostd every 5 min
- Contains data for persistent vdPorts (vmkernel)
- The smaller files ("10" in our case)
- Updated with vdPort information every 5 min by hostd
- Contains data for the VM's vNIC's that is attached to the vDS
Comment: vDS:虚拟化分布交换机(Virtual Distributed Switch)
Virtual老薛翻译版:
大家曾经有没有怀疑过在Datastore中的.dvsData是干嘛用的?这篇文章我将给出这些代表什么和它的作用。 首先是一些围绕 vDS switch的信息,每一个vDS switch都有一个 UUID:"6a de 0e 50 80 32 76 68-e0 72 fd 00 c3 23 52 92" (举例说明),你展开.dvsData 文件夹可以看到这些号码,每一串数字都对应一个vDS switch,可以被ESXi所使用。 文件规则:
1. .dvsData文件只在Datastore中有VM使用到 vDS时才被创建,因此如果VM只绑定了普通vswitch的时候该文件夹不会出现, 也只有当Datastore中有 .vmx config文件的时候.dvsData才会被创建
2. Datastore里边是每一个UUID number对应相应的
vDS switch.为一个文件夹
3.UUID 文件夹里边是一个以数字命名的小文件,这个数字对应.vmx config文件里的ethernetx.dvs.portId项,这个小文件名是10则 ethernet0.dvs.portId=10下面是我Virtual老薛自己的截图:
大家可以看到dvs.portId的号码对应了虚拟交换机上面的端口号
为什么这个dvs.portId很重要?因为HA在其他机器上面启动的时候需要这个文件(vDS的发明主要作用就是为了统一管理虚拟网络交换机,如果交换机的配置不一样HA是切换不过来的),启动的时候Port state, MTU, run time packets stats需要被传输到新的ESXi主机上,vMotion同理
配置文件保存在系统的:/etc/vmware/ dvsdata.db 每5分钟会被Host更新一次