Is Proxmox+KVM right for my needs?

Question

Virtualization

At the moment I am using a dedicated server from hosting (8 streams + 64GB of RAM, 400GB SSD), on this server there is a site with an audience of 18k hosts per day, CRM Vtiger. Recently, the average load on the server has exceeded 6la (8la is the utilization of all threads) and because of this there are problems in the crm (some php scripts work with an error), apparently due to peak loads on the site. Renting a more powerful server is expensive, cheaper to buy! Today we brought a new server (64 threads, 128GB, 1.6TB SSD NVME 5.5GB/s). I want to install virtual machines on it for each resource: crm, website, asterisk, and 2 projects on django. Here they advised to use Proxmox + KVM, I looked what it is, it seems friendly, BUT open source! And this means that some errors and instability are possible, judging by my experience with open source CPM.
Should I choose Proxmox+KVM for my needs? Will it work in the same way as, for example, asterisk or Linux - set it up and forget it.
I also want resources to be distributed dynamically by priorities and not statically (so many cores are reserved for the machine), just set priorities, is this possible in Proxmox + KVM?
As for backups and restores, the machines will not be on RAID, but on a bare NVME SSD, only the host is on the ride, I hope for the reliability of the Samsung 1600GB PCIe HH/HL SSD.

Answer 1

If you don't like proxmox - well, install vmware, the license for one host is free. True, there is no CBT in the free license, so you will have to pervert with backups.

Answer 2

My personal opinion.
Firstly, when switching to virtual machines, you will lose disk performance.
Secondly, for some reason open source works more reliably than paid analogues (purely according to my observations)
KVM started as open source, but given that it is used all over the world in virtualization, and they make money on it, you understand, it works fine.
I personally have it spinning for more than a year, though for other tasks. There were no particular problems.
Proxmox is essentially a "web configuration tool" for those who can't configure it any other way. But that also means less flexibility. I think it is based on debian, when KVM was developed under redhat (if I'm not mistaken) I have kvm running on centos
About backups - MANDATORY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!! using RAID!!!!!!!!!!!!!!! 1 at least.
AND DEFINITELY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! backups are made - daily, weekly, etc.
And then the disk will die suddenly, and you will be left without anything, well, or with the last day backup)
Although of course it depends on the amount of information being replaced.
I always use raid in production

Answer 3

Of course it fits
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