72 lines
2.9 KiB
Markdown
72 lines
2.9 KiB
Markdown
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Title: The poor fella's KVM over IP
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Date: 2017-10-13T19:06+02:00
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Author: Wxcafé
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Category:
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Slug: the_poor_fellas_kvm_over_ip
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# Or, how I learned to stop worrying about which hosting providers supported my OS and love QEMU/KVM
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---
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### Story part
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So uh recently I was thinking about migrating my main server (the one that
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hosts, among other things, this website) to a new, improved, cleaner server. The
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one that runs this is on debian, lived through wheezy, jessie and stretch, and since
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I've experimented on it a fair bit in the ~4 years it's been running, is
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littered with weird projects and packages that shouldn't be installed and stuff.
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Yeah, that's practically the definition of "bad admin practices", but I was
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young(er) when this server started running.
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Anyway, I was thinking of upgrading to a new server with FreeBSD, and using
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Jails to isolate the services (it's, uh, still a WIP). Since I like Online.net
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a lot when it comes to hosting servers (they're relatively cheap and they
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provide good service, which is all I ask generally), and that they support
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FreeBSD, I decided to order a server from them and work on the migration over
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the next few weeks.
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Alas! After ordering the server, it appears they only support FreeBSD on UFS!
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Since I was born after 1983, I didn't want to use UFS as root on a FreeBSD
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server, that would be a waste! So, obviously, I decided to use the KVM-over-IP
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access they provide to load up an ISO and install things my way.
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Well, I was a fool, cause the class of server I ordered (the cheapest) don't
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have KVM-over-IP! That's a feature reserved for the slightly more expensive
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ones. But I didn't want to upgrade and pay more per month, so I thought and
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thought, and I ended up coming with the following solution
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### Technical part
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So the idea is pretty simple: spawn a Qemu VM, with its first disk being the
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server's physical disk, and the ISO of the OS you want to install. Then perform
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a simple installation, fix things up a bit (network interface name/IP, stuff
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like that), reboot, and profit.
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What I did for FreeBSD 11 specifically was
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```bash
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sudo apt install qemu-kvm
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wget http://ftp.fr.freebsd.org/mirrors/ftp.freebsd.org/releases/ISO-IMAGES/11.1/FreeBSD-11.1-RELEASE-amd64-disc1.iso
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qemu-system-x86_64 -hda /dev/sda -cdrom FreeBSD-11.1-RELEASE-amd64-disc1.iso -net nic,model=e1000 -curses -boot d
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```
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Then, do the install in the, uh, even-uglier-than-usual environment of the
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curses Qemu interface. Nothing special about this, it's a standard FreeBSD
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install. Afterwards, spawn a shell, edit /etc/rc.conf
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```
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ifconfig_igb0="inet xxx.xxx.xxx.xxx netmask 255.255.255.0"
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defaultrouter="xxx.xxx.xxx.xxx"
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```
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Reboot, and your server should come up. If it doesn't, well, you can always boot
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the recovery FreeBSD system to see what's wrong, or reinstall and retry.
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Of course, I'm speaking about FreeBSD here but this works with any target OS,
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linux, FreeBSD, Windows, Haiku, Plan9... whatever.
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It's kinda hacky, but
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## WOЯKƧ ꟻOR MƎ
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