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that's the tool used by pve to send you update notifications afair. maybe its not installed on proxmox backup by default

apt install apt-listchanges

take a look at thomaskrenn.com (if from europe), you can choose "proxmox compatible" there when configurating servers. we use supermicro over decades and would never go back to dell, hpe or ibm (been there, done that)

in our experience, no. we switched from intel to amd some years ago and nearly 100% of live migrations between different archs ended in segfaults.

not an expert but my thoughts: 5 of 6 down is never possible, you need a valid qorum that means 50%+1 up if you heavily need storage high available in 3 dc areas, you better invest a little bit more (then you rarly get the 5/6 situation) if I imagine the bandwith costs between east-west (is...

the installscript of fusionPBX installs a bunch of software. e.g. nginx, php etc and compiles freeswitch from source. take a look at the install script and remove these programms (apt remove or apt purge). remove freeswitch and it systemd units than install pve again. i guess nothing is lost...

probably by cloning (clonezilla e.g.) it and restore it with a desktop virtualization (virtualbox e.g.)

its all Linux? if yes you can migrate with nearly zero downtime by just using rsync and some scripting. we "once" migrated from xen to kvm did it that way. it takes time but no downtime

you can separate management and migration network (and should)

i'd prefere redundancy. migrations are done rarly, so 95% of the time the bond would be used for storage only. depends on your situation but we dont do any network without redundant link

i'd definitly go for bonding the 2 x 10gbs interfaces and run vmmigration etc and storage in vlans within. 2 x 1gbs for corosync, 2 x 1gbs bonding for non speed relevant vlans, uplinks, etc

such mal nach synergy und barriere. ersteres habe ich jahrelang benutzt

den alten raspi zum thinclient machen? wir verwenden für remote desktop x2go

30 nodes is not that much. even we as a small company have had problems with this limi5s, resulting in operating several clusters. this is one of the biggest disadvanteges of proxmox in my opinon.

besides the 10y thing :) these are 2 completely different concepts I guess. op didnt show any details but sounds like a firewall infront of the network vs host based firewalling

take a look at tailscale/headscale

what's the benefit installing pve on arm? afais the performance cannot compet with recent amd64 machines. i guess price:performance is a win for amd64

Das ist kein Trend sonder schon lange Realität. Wir haben seit Ewigkeiten keinen Server mehr mit spinning Disks. Den Feldversuch mit billigen SSDs a la EVOs haben wir auch schon hinter uns. Würde ich selbst bei Webservern mit wenig io nicht empfehlen. Kosten/Nutzen spricht für Enterprise SSDs.

when you boot, stop in grub with "e" edit then edit the boot command with additional init= /bin/bash then boot you are landing in a bash with / mounted read only. remount / rw and you can change or deactivate root pasword. after reboot you can login and investigate (probably interface renaming...

lsof -p $pid should give you a clue (at least the path of the binary) dpkg -S $binary maybe the package it comes from (if deb package)