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xen300 XenServer


Citrix Xen300 training
1.Architecture 2.Toolstack 3.CLI management 4.Sizing 5.Networking //XS6 open switch 6.Storage 7.Resource Pools //Sync network configuration 8.Virtual Machine Start

up //In pool environment, VM startup on which Host? 9.High Availability //2 or above HA, not recommand 2 hosts HA

Architecture
Hardware requirements: 1.Intel-VT/ AMD-V 2. 64bit CPU

Hypervisor 1.Auditor and management

Domain 0 1.First VM is the Domain0 2.DOM0 //is SUSE Sp1 kernel(32bit) 3.QEMU //only focus on Windows VM 4.VNC //XenCenter Console 5.SSHD //command line port 22 6.state.db// 6-7MB memory

Domain U

1. CPU and Memory is direct to communicate with Hardware, but Disk I/O and Networking is indirect. 2. XenTools is necessary 3. XenServer 6 Xentools (.net 4.0)is totally different from XenServer 5.6, you could upgrade from 5.6 to 6.0 by Rolling pool upgrade, but not upgrade Xentools!!! 4. management SSH port 22 XenCenter 443 //半虚拟化

State.DB Pre. CTX1211564

Toolstack XAPI Service
1. license server 2. Storage 3.Active Directory

Objects
1. uuid is the only identity number for each VM

CLI
1.xe help 2. xe help -all 3. network communication SSL More information ,read the XS5.6 or XS6.0 for details! Attention: Please remove from HA if you have any issues.

XenServer Log
/var/log/messages /var/log/xensrouce.log /var/log/xha.log #dmesg

XenServer Agent/Service
#service xapi restart #/etc/init.d/xpai restart #xsconsole

Enhanced Resource Control-CPU
CPU Pinning #xe vm-param-set uuid=<vmuuid> VCPUs-params:mask=1,2,3 //Limits VM to running on CPU number 1,2,3

CPU Weight #xe vm-param-set uuid=<vmuuid> VCPUs-params:weight=500 // 512 will get twice as much as 256

CPU Cap #xe vm-param-set uuid=<vmuuid> VCPUs-params:cap=100 //Restricts percentage of CPU cores VM can use 50=half a CPU core, 100= 1 CPU core, 400=4 CPU cores

1个Core运行3个VM是比较好的情况!!! CTX117960 vCPUS Best Practice 10 Vms with 1 vCPU each

10 vCPUs - VMs<=

How to adjust storage repository and virtual disk quality of service settings
CTX122645

Memory Best Practices 不要超分内存!!!

Network Best Practices 4 NIC server

1NIC for VM traffic 1NIC for Server Traffic inter-server communication XenMotion Traffic Import/Export Traffic 2NIC bond for Network

Backing up XenServer Plug-In P2V,V2V //need A DHCP Server

Networking XAPI view #xe pif-list params=all

Dom0 view ifconfig

Linux: vif3.0

(DomainID+device no.)

Windows: tap4.1(HVM mode)

Network objects:nework

#brctl show bond模式有两种A-A and A-S.对于不同的交换机, A-A模式在切换时会引起丢包的情 况发生。!!

Storage Thin provisioning 勾上 StorageLink had been cancelled! multhpath XenServer 5.0 CTX

HA overview Provides master election Provides VM restart after host failure Dettach CDROM CTX129721 //HA behavior when the heartbeat is lost between two hosts in a pool CTX127059 CTX124421 //Network Bonding CTX123477 //how to move a xenserver pool to a defferent IP Subnet https://taas.citrix.com/apollo //分析系统

VM备份のPHD http://virtualtop.blog.51cto.com/blog/41003/510776

WLB(XS6.0) and HA Linux edition for WLB is much more easier to use!

Only one WLB server for each resource pool!!! When yellow star appeard on host, WLB VM works fine! CTX121708


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