Here is a quick summary of what I learned:
iLo is awesome
You need a usb stick with a MBR Partition table (GPT does NOT work) for the Microserver to recognize it.
Check Proxmox Docs. Do not use UNetBootin. It gives you an error saying that he can not fin a valid Proxmox ISO. I ended up using a local ISO with iLo anyways.
The Microserver G8 has a problem booting from the 5th SATA (the ODD slot, where the CD-Rom device should go, when there is any disc in the caddies for the HDDs). You need to install grub in a USB or microSD, install it in the internal port and configure the server to boot from there.
Proxmox 7.0 seems not to be compatible with HPE Microserver G8. Proxmox 6.4 didn’t have any problem and works.
Install Proxmox on a HPE MicroServer G8 (release on 2013) on the 5th SATA (ODD) and boot from the internal SD Card using Grub.
I bought a used server which was preconfigured with the owners old passwords, so I had to reconfigure it for my needs. Your case may be different. In my case I had to activate the virtualization capabilities of the processor, activate all the cores (there were only 2 enabled) and reorder the boot sequence. I also had to configure iLo with my user and passwords as well as with my own hostname.
In any case, you have to be able to access iLo and open a remote console to follow this guide.
Download Proxmox 6.4 ISO image from here
Go to iLo Interface, open a Remote Console
Load the Proxmox ISO (version 6.4)
Set the server to boot once from the cd-rom
Power on the server. It should boot into a menu to install Proxmox. Follow the instructions. Just keep in my that the process will delete all data on the installation hard drive, so do proper backups before if you are using a non-empty hard drive.
Once it finishes the installation process you get the following screen:
This one was of great help :) https://www.bastelbunker.de/hp-microserver-gen8-booten-von-den-odd-port/
You first need to partition the card, format it to ext2 or ext4 and make it bootable. You can use a Linux Live CD for this. I used Lubuntu Live Cd and KPartition.
The tricky part is to find the right disk and the right options for the grub.cfg to work. I got many Red Screens while testing. In the end I didn’t try anymore and solved it as follows:
Remove all the hard drives (and only leave the one in SATA 5 (ODD).
Boot into your Proxmox system and login as root. You added a password as part of the installation.
Mount the SD Card. In my case, with only a HD in SATA 5 and a microSD and create a
bootfolder there, I used
Now install grub in the microsd
Here is where the trick is. Instead of creating
grub.cfgby hand, and because be booted in our running system, we can use
update-grubto create the config file already configured for our system.
And that’s all. We can now boot from the microSD directly into our Proxmox 6.4 system. Now power-off your server, plug your hard drives again and power it on. It should boot right to Proxmox :)
The devices get a specific internal name and this changes depending on the port, computer and so on.
fdisk -l to list all partitions. I recognized my device (microSd
card) because of the size.
This was an Input/Output Error as I realized in the terminal.
My problem was the network, as I was installing Proxmox over the net with iLo and my Mac was on WiFi (yes, I should not have done that). I connected a LAN cable and it worked. I had to restart the installation though.
There was an option in the installation process to customize how the hard drive was going to be used. I added a swap that was to big (and I would have known that if I had read the Proxmox Installation Documentation before attempting to install it… but who does that. Anyway you have to know that you can set a maximum of 8gb for the swap partition.
As quick reference use
lsblk in the command line.
You can read more here https://serverfault.com/a/820467/539133 but in summary the server need a USB stick with an MBR partition and not and GPT. You can read more about the differences at https://www.howtogeek.com/193669/whats-the-difference-between-gpt-and-mbr-when-partitioning-a-drive/
Use MBR Partitions.
So you used something that Unetbootin, Etcher or similar to flash your use stick (or micro SD) and it does not boot. Did you read the documentation Prepare Installation Media? I didn’t, and it took me a while to find this.
These are some websites, articles and discussions I read to set this whole thing up. They are in no particular order and I may have left many out.