Proxmox

• Install
• Default
• Old screens (black screen issue)
• Nodes
• Rename
• Ceph
• Install
• Pool setup
• Remove
• Lvm
• Remove old drives
• Vm
• Create a vm
• Resize vm disk
• Disable swap
• SSH setup
• Arch install

Install

Default

1. Graphical option
2. Just do it
3. https://docs.napo280.ovh/link/1#bkmrk-page-title

Old screens (black screen issue)

use https://dev-pages.info/troubleshooting-proxmox-installation-issues-fixing-black-screen-problem/ to fix it

Nodes

Rename

https://pve.proxmox.com/wiki/Renaming_a_PVE_node

Ceph

Install

Use proxmox WebUI, no special options needed

Pool setup

Setup osds

Create a pool, set min size to 2 ( min size and size are nb of hosts )
After it was created, set it to 1. This is not recommended, but for now we only have 1 host operational ( and with enough storage )

Remove

systemctl stop ceph-mon.target
systemctl stop ceph-mgr.target
systemctl stop ceph-mds.target
systemctl stop ceph-osd.target
rm -rf /etc/systemd/system/ceph*
killall -9 ceph-mon ceph-mgr ceph-mds
rm -rf /var/lib/ceph/mon/  /var/lib/ceph/mgr/  /var/lib/ceph/mds/
pveceph purge
apt purge ceph-mon ceph-osd ceph-mgr ceph-mds
apt purge ceph-base ceph-mgr-modules-core
rm -rf /etc/ceph/*
rm -rf /etc/pve/ceph.conf
rm -rf /etc/pve/priv/ceph.*

These HAVE to be run on each nodes

Don't forget to restart your node after running these commands !

Lvm

Remove old drives

Delete it in proxmox web UI

If ghost drive, go to your node's /etc/pve/storage.cfg file and edit it.

Vm

Create a vm

Using proxmox webUI, don't forget to check Qemu agent.
After having installed it EACH vm, don't forget to remove CD/DVD iso as it won't be used anymore, otherwise you'll get an error if you need to migrate your vm.

Resize vm disk

• Resize disk in the vm's hardware tab using proxmox webUI
• Find disk's name (usually for us sda)
• launch parted parted /dev/sda
• use print  to print the current partition table (replace sda with disk's name)
  
• resize your taget partition with resizepart <PART's ID> 100%
  
• Finally, quit parted and run resize2fs /dev/sda{PART's ID}

Useful : https://stackoverflow.com/questions/57302142/why-df-h-and-lsblk-show-different-sizes-of-my-one-and-only-xvda1

Source :

DON'T DO PART 2 AND 3, do only one of them
Part 3 is a replacement or part 2.
https://pve.proxmox.com/wiki/Resize_disks

Disable swap

If you have GParted open, close it. Its Swapoff feature does not appear to to be permanent.

Open terminal and become root (su); if you have sudo enabled, you may also do for example sudo -i; see man sudo for all options):

 sudo -i (Or use sudo for each command)

Turn off the particular swap partition and / or all of the swaps:

swapoff --all

Make 100% sure the particular swap partition partition is off:

cat /proc/swaps

Open a text editor you are skilled in with this file, e.g. nano if unsure:

nano /etc/fstab

Comment out / remove the swap partition's UUID, e.g.:

# UUID=1d3c29bb-d730-4ad0-a659-45b25f60c37d    none    swap    sw    0    0

Open a text editor you are skilled in with this file, e.g. nano if unsure:

 nano /etc/initramfs-tools/conf.d/resume

Comment out / remove / change with 'none' the previously identified swap partition's UUID, e.g.:

RESUME=none

If your swap is encrypted, do the same with /etc/crypttab.

SSH setup

   28  sudo vim /etc/ssh/sshd_config.d/disable_root_login.conf
   29  /etc/init.d/ssh reload
   30  sudo systemctl restart ssh

sudo vim /etc/ssh/sshd_config.d/disable_root_login.conf
sudo systemctl restart sshd

arthur_wambst@wingsBackup:~$ cat /etc/ssh/sshd_config.d/disable_root_login.conf 

sudo echo "ChallengeResponseAuthentication no\nPasswordAuthentication no\nUsePAM no\nPermitRootLogin no" > /etc/ssh/sshd_config.d/disable_root_login.conf 

export PORT=.
ssh-copy-id -p $PORT napo280.ovh
ssh napo280.ovh -p $PORT

cat <<EOF | sudo tee /etc/ssh/sshd_config.d/disable_root_login.conf   
ChallengeResponseAuthentication no
PasswordAuthentication no
UsePAM no
PermitRootLogin no
EOF
sudo systemctl restart sshd

arthur_wambst@WORK-KARTOFFEL:~/TP_assembleur$ ssh-copy-id -p 2331 napo280.ovh

Arch install

fdisk /dev/sda

g
n
w

mkfs.ext4 /dev/sda1
pacman -Syy
pacman -S reflector
cp /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist.bak
reflector -c "FR" -f 12 -l 10 -n 12 --save /etc/pacman.d/mirrorlist
mount /dev/sda1 /mnt
pacstrap /mnt base linux linux-firmware vim nano
genfstab -U /mnt >> /mnt/etc/fstab
arch-chroot /mnt
pacman -Sy grub sudo cni-plugins dhcpcd qemu-guest-agent openssh
systemctl enable --now sshd
systemctl enable --now dhcpcd
echo HOSTNAME > /etc/hostname
cat <<EOF | tee /etc/hosts  
127.0.0.1	localhost
::1		localhost
127.0.1.1	HOSTNAME
EOF
passwd

grub-install /dev/sda
grub-mkconfig -o /boot/grub/grub.cfg
useradd -m arthur_wambst
usermod -aG wheel,audio,video,storage arthur_wambst
passwd arthur_wambst

visudo

Change %wheel.... all  (uncomment to allow...)

umount /mnt
shutdown now