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Hello, I was testing something for my environment, what I notice if I use ifdown vmbr1 all the communication take place from vmbr1 will be break (that's normal), but when I activate the vmbr1 using ifup vmbr1, it shows the link is activated, but all the virtual machines using vmbr1 cannot...

you need to start studying ... Start from here .. https://pve.proxmox.com/wiki/Storage_Model

What went wrong? Your other solution is also good as long as it serve the purpose. You can also try two nodes drbd84 cluster with heartbeat (for HA), drbd will take care of sync. while heartbeat will take care of Services, In this scenario you don't even need Proxmox.

Thanks for the clarification, thought, it was necessary for migrating.

Thanks for the reply, # cat /etc/pve/storage.cfg dir: local path /var/lib/vz content backup,vztmpl,iso lvmthin: local-lvm vgname pve thinpool data content rootdir,images lvm: Raid5-Storage vgname Raid5 content rootdir,images...

Hello, Its a weird problem, I am trying to migrate Windows Server "Offline" the migration takes only 2 seconds, and it shows the Task OK, but it didn't migrate the HDD (raw disk), Both Servers use Local Disk not shared storage. The Proxmox Server is up to date. I don't know how to explain it...

yes, I did, just notice...

I think, you are looking for HA-Proxy on Proxmox. http://acidrop.biz/wp/?p=654

Now, you are talking about High Availability, the scenario is changed. it is not what you initially asked.

No, you don't need third server, if you just want to control them from one gui. in your scenario it can be done.

Yes, you can control from the Same GUI, but need to be Clustered all the servers, its not necessary to be HA cluster.

No, its still not supported without Shared Storage.

Multicast is not depend on the servers, it depend on your network switch. https://pve.proxmox.com/wiki/Multicast_notes

Hello wolfgang, Is it only for "Software Raid5" or do you think Hardware Raid5 is also bad combination ? Just want to make sure...

I can conform, simulator is available at proxmox repo, I guess you didn't configure the proxmox repo ? do you have enterprise repo subscription ? (its paid) https://pve.proxmox.com/wiki/Package_Repositories If no then follow the guide to enable the no subscription repo...

Looking at your screen shots, I think you have two Servers for proxmox, and Local Storage, (you don't have NAS?) Follow this guide for more information, https://pve.proxmox.com/wiki/High_Availability_Cluster_4.x https://pve.proxmox.com/wiki/DRBD9 Proxmox team recommend at least 3 nodes.

Yes sir, you need to remove that CD/DVD Drive (ide2). and one more thing, if the "local-lvm" is not shared storage between Server1 and Server2, you need offline migration, online migration only works on "shared-storage"

The reason might be the "CD Rom" attached to the VM, you may need to remove any "disk" which is attached to "local storage" instead of shared storage.

before you do this, I suggest to revert back all the changes you made in 100.conf files.

That's all depends on how did you install the storage, if you are using local storage, the path will be /var/lib/vz if you are using LVM, the path will be /dev/YOUR-LVM, if you are using shared storage, the path is different, depends on what you're using.