fixes (dropbear etc)

This commit is contained in:
Dominik Moritz Roth 2025-08-18 00:10:29 +02:00
parent d80a6a2ab1
commit ac4740438b
3 changed files with 64 additions and 5 deletions

View File

@ -8,5 +8,6 @@ FILESYSTEM xfs
IMAGE /root/images/Alma-9-latest-amd64-base.tar.gz IMAGE /root/images/Alma-9-latest-amd64-base.tar.gz
CRYPTPASSWORD changeme CRYPTPASSWORD changeme
PART /boot/efi esp 256M
PART /boot ext4 2G PART /boot ext4 2G
PART / xfs all crypt PART / xfs all crypt

View File

@ -236,7 +236,7 @@ fi
echo -e "\n[+] Starting Hetzner installimage..." echo -e "\n[+] Starting Hetzner installimage..."
echo "The installer will now run. Follow any prompts if needed." echo "The installer will now run. Follow any prompts if needed."
echo "" echo ""
if ! $INSTALLIMAGE_CMD -a -c /root/install.conf -s /root/post-install.sh; then if ! $INSTALLIMAGE_CMD -a -c /root/install.conf -x /root/post-install.sh; then
echo -e "\nERROR: Installation failed!" echo -e "\nERROR: Installation failed!"
exit 1 exit 1
fi fi

View File

@ -104,7 +104,8 @@ dnf config-manager --set-enabled crb
dnf install -y \ dnf install -y \
clevis clevis-luks clevis-tang clevis-tpm2 tpm2-tools tpm2-tss \ clevis clevis-luks clevis-tang clevis-tpm2 tpm2-tools tpm2-tss \
git zsh tmux neovim python3-pip \ git zsh tmux neovim python3-pip \
dracut-clevis dropbear tree curl wget nano dracut-clevis dracut-network \
dropbear tree curl wget nano
# Install lsd and bat from GitHub releases (not in repos) # Install lsd and bat from GitHub releases (not in repos)
echo "[+] Installing lsd and bat..." echo "[+] Installing lsd and bat..."
@ -174,10 +175,65 @@ systemctl enable clevis-luks-askpass.service
# Configure dropbear for remote unlock # Configure dropbear for remote unlock
echo "[+] Configuring dropbear for remote unlock..." echo "[+] Configuring dropbear for remote unlock..."
# Install dropbear-dracut module
cat > /usr/lib/dracut/modules.d/60dropbear/module-setup.sh << 'EOF'
#!/bin/bash
check() {
require_binaries dropbear || return 1
return 0
}
depends() {
echo network
return 0
}
install() {
inst_multiple dropbear dropbearkey
mkdir -p "$initdir/etc/dropbear"
# Copy authorized keys
[ -f /etc/dropbear/authorized_keys ] && inst /etc/dropbear/authorized_keys /etc/dropbear/authorized_keys
# Generate host keys if not present
[ -f /etc/dropbear/dropbear_rsa_host_key ] || dropbearkey -t rsa -f /etc/dropbear/dropbear_rsa_host_key
[ -f /etc/dropbear/dropbear_ecdsa_host_key ] || dropbearkey -t ecdsa -f /etc/dropbear/dropbear_ecdsa_host_key
[ -f /etc/dropbear/dropbear_ed25519_host_key ] || dropbearkey -t ed25519 -f /etc/dropbear/dropbear_ed25519_host_key
inst /etc/dropbear/dropbear_*_host_key
inst_hook cmdline 60 "$moddir/dropbear-start.sh"
inst_simple "$moddir/unlock-luks.sh" /bin/unlock-luks
}
EOF
cat > /usr/lib/dracut/modules.d/60dropbear/dropbear-start.sh << 'EOF'
#!/bin/bash
info "Starting dropbear SSH server..."
[ -d /etc/dropbear ] || mkdir -p /etc/dropbear
dropbear -E -s -j -k -p 2222 -P /var/run/dropbear.pid
EOF
cat > /usr/lib/dracut/modules.d/60dropbear/unlock-luks.sh << 'EOF'
#!/bin/bash
echo "Unlocking LUKS devices..."
for device in /dev/mapper/luks-*; do
if [ -b "$device" ]; then
cryptsetup luksOpen "$device" "${device##*/}"
fi
done
echo "Devices unlocked. System will continue booting..."
EOF
chmod +x /usr/lib/dracut/modules.d/60dropbear/*.sh
# Copy SSH key for dropbear
mkdir -p /etc/dropbear mkdir -p /etc/dropbear
echo "${SSH_KEY}" > /etc/dropbear/authorized_keys echo "${SSH_KEY}" > /etc/dropbear/authorized_keys
chmod 600 /etc/dropbear/authorized_keys chmod 600 /etc/dropbear/authorized_keys
# Add dracut configuration for network and dropbear
cat > /etc/dracut.conf.d/99-dropbear.conf << 'EOF'
add_dracutmodules+=" network dropbear "
install_items+=" /etc/dropbear/authorized_keys /etc/dropbear/dropbear_*_host_key "
EOF
# Regenerate initramfs # Regenerate initramfs
echo "[+] Regenerating initramfs..." echo "[+] Regenerating initramfs..."
dracut -f --regenerate-all dracut -f --regenerate-all
@ -201,6 +257,8 @@ echo "IMPORTANT: The LUKS passphrase is set in install.conf"
echo "Save it securely for recovery purposes." echo "Save it securely for recovery purposes."
echo "" echo ""
echo "After reboot:" echo "After reboot:"
echo "- System will unlock automatically if TPM/Tang configured" echo "- SSH to port 2222 to unlock LUKS: ssh -p 2222 root@<server-ip>"
echo "- Or SSH to port 22 for manual unlock" echo "- Run 'unlock-luks' and enter the LUKS passphrase"
echo "- Then SSH as user '${ALMA_USER}'" echo "- Once unlocked, SSH to port 22 as user '${ALMA_USER}'"
echo ""
echo "If TPM/Tang is configured, automatic unlock will be attempted first"