XCP-NG & Xenmotion: Migrating Live VM's Between Servers and not even dropping a call in FreePBX!
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- čas přidán 10. 07. 2018
- lawrence.video/xcp-ng
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So just for those who have not had the joy of doing one of these, with all the flavors (VMotion, xenmotion, live migration, etc.). You have three choices, resource migration (CPU/ram) just move hosts, storage migration (move the virtual disks), and all of the above. Of course, each one may limit which migration you can do based on the licensing, I know with XCP-NG you get all of the above included, and I believe the same is true with Hyper-V live migration.
I have been using this in xenserver / xcp for years. Love it. Love XCP. Great video as always Tom.
Excellent videos! Keep 'em coming and thanks again!
Thank you for this information! VERY HELPFUL!
Excellent video and informative!
Thanks for the awesome videos!
XCP isn't the name of the company, just the name of the project (Xen Community Project - New Generation, XCP-ng). The company that's running it is Vates, the same company that produces Xen Orchestra.
#facts
Thanks for this.
Very cool video man!
I would love to see a video on the new Backup-NG as well as the networking video you mentioned.
Great video!
This is great - would you recommend live migrating an SBS2011 domain controller (Windows Server 2011 SBS) that has two "secondary - I know that's not really how it works but you get the idea... " domain controllers without ruining the invocation IDs and sync between the three? Or is it better to backup the server and restore at the other end? It has Exchange :( ... because that's how it was when I got here. Thx.
My VMs all reside on 2 SR shared over nfs from NAS. So for me this works perfectly. How did I learn all that? Tom's videos
Is there anything special you need to do to get the 10Gb card to work? Got two servers with 10Gb cards and fiber cable but nothing shows up on XenOrchestra for network configuration. Great video by the way.
Liked your network diagram. A quick video on how you made it would be gd? I might be the only personal that watches it but I will enjoy it 😅
I think he actually did a video a few months back on that but I can't remember!!!
Kristopher Leslie. OK I will have a look. If anyone can find the video please share it here!
Hi Lawrence.
Nice video!
I have a question about XCP-NG; Is it compatible with all Intel CPUs or only Intel Xeon CPUs?
Any CPU's that support virtualization, Intel Or AMD.
Do you have a script you use to setup your shell? I assume it's an Oh-My-ZSH theme
github.com/flipsidecreations/dotfiles
I want to get into XCP-ng and XOA but there is a lack of tutorials / documentation to setup up CoreOS with docker support in the newly minted XCP flavor of Xensever. As I understand it, the xscontainer you previously downloaded through Citrix is now a simple yum install command, however I still can't figure out how to get this configured.
I have not tested it, but is should just work by doing yum install xscontainer on the server.
Thanks, I'll give it another try but xoa cant get an ip for the coreOS vm. not really making progress, that's why i though a walkthrough setting it up might me helpful.
Good explanation
What if the vm had snapshots? Are snapshots also migrated?
Yes
Are all those vms in a windows or linux vm? Such as PBX, unifi controller, screen connect etc.?
All Linux, we don't run any windows servers at my office ;)
Lawrence Systems / PC Pickup Does ScreenConnect have a Linux version?
Is Xen Orchestra the only program that can be used to manage the XCP-NG hosts?
No, you can use their XCP-ng Center software in windows or SSH into the server and run commands manually
So are you moving the virtual disks from one machine to another?
Yes
Is there any reason why you just don't store them on the FreeNAS machine then you don't have to move them? What is the FreeNAS machine doing in this scenario?
I could setup multipath storage and yes, that would work but then the FreeNAS becomes a single point of failure. By moving these VM's over to another machine that has it's own storage I can take down either the XCP-NG server or the FreeNAS for service.
If you are migrating a "hot" machine, how are the blocks that are written on the old machine copied to the new machine if they were already copied once?
A VoIP call would stay up even if the VoIP server goes down as the H.323 handshake was already done and the connection is only between that phone and the other phone...
no, I was calling into my server and it was playing the greeting for our main menus, if the server goes down the greeting would have stopped.
Why don't you have each 10gig link going to the nas ? If the middle host fails both hosts fail....
The 10G link between the servers is just for doing the migrations.
Chances of it failing is very low. But I understand your thought on using a star network. In production, the path with the least amount of risk is usually is the best course to take. Adding more cables does introduce more risk technically.
If you ever have that one box fail you are screwed. Multipath is best. Did the FULL emc course and they all state dual redundant paths is best. Single paths = disaster waiting to happen..
I can agree, but everything always doesn't require "dual or quad" everything. What wasn't expressed was cost. It's no different that the debate of having 1 server 2 or a pool. All of them are fine just depends on the use case, cost and application.
But if I had the $ to burn, sure I'd get 2 but that only makes it more complex.
I think this process is faster in vsphere
Hard to say unless we reload the same servers with VMWare and test. I have not found anyone that has done any testing since 2011 on this topic. I don't really have the time to load up VMWare to test on my hardware.
Roughly the same. I have done testing between VMware host and for XenServer. I tip my hat to VMware for having possibly a better cache/ram usage on the host during utilization of a migration.
Kristopher Leslie i have tested vsphere in virtual environment, so I'm not really sure.
It's almost identical. But the engineers utilize the ram and cache pretty good from VMWare end. That's actually the "special sauce" for the process. You'll know if your migration is hitting walls pretty quick.
Last but not least if your using a vsan you could see a difference in speed as well.