XCP NG Storage & Migrations Explained
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- čas přidán 10. 05. 2024
- lawrence.video/xcp-ng
Asrock Ryzen 9 XCP-NG Virtualization Server Build With 25GB
• Asrock Ryzen 9 XCP-NG ...
Understanding the storage stack in XCP-ng
xcp-ng.org/blog/2022/06/02/un...
XenServer coalesce
xen-orchestra.com/blog/xenser...
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⏱️ Timestamps ⏱️
00:00 XCP-NG Storage
02:18 Supported XCP-NG Storage Types
03:24 Our Lab Setup
06:28 Storage Setup and Migration Demos
09:54 Adding Shared Storage
17:57 Removing Shared Storage
19:01 XCP-NG Storage Maintenance Mode
#XCPNG #Virtualization #storage - Věda a technologie
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I was really hoping you would talk about XOSAN v1 or v2. It's always mentioned in the documentation, but I have never seen it in action. Perhaps XOSAN is just a Hoax?
It's not open source.
@@marco114 most of the other features are not open source i.e proxies, but I have seen them either in the 30 days trial vm or in other videos/demos. XOSAN to me is just a myth at this point.
@@bentleymax2511 XOSAN was a Third Party solution for XenServer (NOT XCP-ng) and V2 (which should support XCP-ng) isn't finished yet, and will probably be replaced by whatever comes out of their collaboration with Linstor
THANK YOU for the XCP-specific storage instruction. IF you ever get a chance to talk about CEPH storage; I would really love to see a video on that as well. Your channel is priceless!
Thanks
Fixing to setup my first xcp-ng server with local storage, so perfect timing. Also is the any updates to building xcp-ng from source since your last video?
The build should still work the same.
That GH repo gets updated frequently
Hey Tom, if you wouldn’t recommend HA Lizard in the enterprise. What would you use?
We use proper supported HA setups with 3 or more hosts czcams.com/video/jvhUY81pBw0/video.html
How does Windows licensing go when migrating VM's around to different hosts? Do you get license reactivations?
No, because the virtualized hardware is not changing.
Hm, interesting how does it switch out the storage device at runtime, is that a xen feature or does it provide a proxy to the actual Hypervisor?
That's the beauty of how their storage API works, it makes storage have one common interface for the VM regardless of the back end
It's not hypervisor/Xen related, it's toolstack related. When you live migrate a disk from one SR to another, it works like this under the hood:
1. A snapshot is created for the disk
2. A disk mirror is started on destination (all new blocks after the snap are mirrored on destination disk)
3. Then, the whole snapshot (all blocks) is copied to the destination storage (this takes most of the time)
4. When it's copied, the VM is briefly paused (like during a normal live migration, it's barely visible) to switch to the destination disk
5. If it worked, then the source disk is removed, and voila!
That's a very similar mechanism when you live migrate a VM from a pool to another (sharing nothing), you can add memory migration in step 4.
Note: it's fully transparent from the VM perspective, no need to get any special configuration.
Neat, isn't it?
Source is XAPI doc, here: xapi-project.github.io/features/XSM/XSM.html
Which tool did you use to draw the diagram? :)
czcams.com/video/mpF1i9sfEJ0/video.html
Is there any way you can get involved and do a video on XOSAN v2?
Yes, but not until it's released
I watched this video and I still can't migrate my VM to another host. I have two xcp-ng hosts running and VM'S running in each host but when I try to migrate one to the other host, it shows it's migrating and takes a while, then when it stops it's still on the same host. It does not move to the other host. Both host are connected to my network and are available in xen orchestra, do I need to configure a static IP on another network port on each server (host) or any suggestions? Thanks!
Might want to post in the forums but are they on the sane network segment? Joined in the same pool? Does it time out and give an error?
@@LAWRENCESYSTEMS Same network segment, not sure if it times out but it does not give an error, when check pools there are two host, both say Master. So I guess it's two separate pools. it's two servers. I will join the forum and post. Thank you.
Hello i just installed xcp ng on my epic setup with 32 cores and 64 threads, how do i add all 64 threads in a VM ? is it possible ? thanks!!
Yes, edit the number of cores on the VM, set it to 64
What's the reason you didn't want to use HA-lizard for production use?
Have not tried it myself but it looks pretty neat.
Not officially supported by the project so I would worry about stability and reliability
@@LAWRENCESYSTEMS Makes sense. If the HA-lizard project matures and gets integrated, it might turn XCP-NG into an hyperconvergence solution (like Nutanix)...right?
how can we setup redudant iscasy shares , for failover
you can setup iSCSI multipath
how does incremental snapshots work in xc-png , there is i think a capacity of 20 snapshots in total after that how are we supposed to proceed . can i have an api for that ? what is the logic behind .
Having that many snapsots on any VM is not a good idea for performance reasons and yes they have an API.
@@LAWRENCESYSTEMS HI CAN I HAVE THAT API SNIPPET I WOULD LOVE TO IMPLEMENT THAT ON MY PRODUCTION
@@1nfamous753 I don't use their API you will have to read their docs and build it
I've tried asking in XCP-ng forums but have yet to receive an answer so hopefully you can answer this question.
What are the requirements for a Suspend SR? I would like to be able to take snapshots with VM memory but I don't know if I can simply set my primary SR to also be a Suspend SR or not. Last I looked there was nothing in their forums or docs explaining how to configure it.
Suspend is not dependent on the SR type.
@@LAWRENCESYSTEMS Thank you! Set my primary SR as a Suspend SR and snapshot with memory worked perfectly! I was worried setting that on my primary SR could potentially cause issues (worst being VM lockups or vdi corruption) so I'm glad that didn't happen.