ishad0w · November 14, 2024 04:48 · ishad0w · Dec 21, 2022 · afteroot · Mar 9, 2023
diff --git a/oci_ubuntu_to_debian.multiarch.sh b/oci_ubuntu_to_debian.multiarch.sh
 #!/bin/bash
 trap "exit" INT
 echo -e "\nHost:"
 ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 ubuntu@$1 \
    'uname -a && arch && uptime && sudo touch /home/ubuntu/.hushlogin /root/.hushlogin'

 echo -e "\nAdding temporary SSH-key for Ubuntu root user..."
 ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 ubuntu@$1 \
    'sudo cat /home/ubuntu/.ssh/authorized_keys | sudo tee /root/.ssh/authorized_keys'

 echo -e "\nSystem trimming..."
 ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL'
 export DEBIAN_FRONTEND=noninteractive
 snap remove --purge oracle-cloud-agent && snap remove --purge core18
 apt-get purge -y linux-* lxc* lxd* vim* snapd* python*
 apt-get update && apt-get install -y lsof
 apt-get -y autoremove --purge
 apt-get -y autoclean
 rm -rf /var/log/* /var/lib/apt/* /var/cache/apt/*
 df -h
 EOL
 echo "Check free space! for "/" mountpoint. <=700mb"
 waittime=15
 while [ $waittime -gt 0 ]; do
   echo -ne "$waittime\033[0K\r"
   sleep 1
   : $((waittime--))
 done

 echo -e "\nPreparing system..."
 ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL'
 cd /
 echo "Mounting tmpfs..."
 mount -t tmpfs -o size=700m tmpfs mnt && tar --one-file-system -c . | tar -C /mnt -x
 mount --make-private -o remount,rw /
 mount --move dev mnt/dev && mount --move proc mnt/proc
 mount --move run mnt/run && mount --move sys mnt/sys
 sed -i "/^[^#]/d;" mnt/etc/fstab
 echo "tmpfs / tmpfs defaults 0 0" >> mnt/etc/fstab
 cd mnt && mkdir old_root
 mount --make-private /
 sleep 2

 echo "Changing the root mount..."
 unshare -m
 pivot_root . old_root
 sleep 5

 echo "Starting SSH on 1022..."
 iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 1022 -j ACCEPT
 nohup /usr/sbin/sshd -D -p 1022 > /dev/null 2>&1 &
 EOL

 echo -e "\nFlashing the Debian image..."
 ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 1022 root@$1 -T <<'EOL'
 echo "Arch is $(arch)..."

 IMAGEMIRROR="https://cloud.debian.org/images/cloud/bookworm"
 IMAGEVERSION="debian-12-genericcloud"
 IMAGEBUILD="20240701-1795"

 for i in agetty dbus-daemon atd iscsid rpcbind unattended-upgrades; do pkill $i; done; kill 1; umount -l /dev/sda1
 if [ $(arch) = "x86_64" ]
    then curl -L $IMAGEMIRROR/$IMAGEBUILD/$IMAGEVERSION-amd64-$IMAGEBUILD.tar.xz | tar -OJxvf - disk.raw | dd of=/dev/sda bs=1M; 
 elif [ $(arch) = "aarch64" ]
    then curl -L $IMAGEMIRROR/$IMAGEBUILD/$IMAGEVERSION-arm64-$IMAGEBUILD.tar.xz | tar -OJxvf - disk.raw | dd of=/dev/sda bs=1M; 
 else 
    echo Unsported architecture!
 fi
 sleep 5

 echo "Syncing changes to the block storage..."
 sync
 sleep 5

 echo "Rebooting into Debian!"
 nohup sh -c 'echo "1" > /proc/sys/kernel/sysrq && sleep 5 && echo "b" > /proc/sysrq-trigger' > /dev/null 2>&1 &
 EOL

 echo -e "\nWaiting until Debian starts... (3 min)"
 waittime=180
 while [ $waittime -gt 0 ]; do
   echo -ne "$waittime\033[0K\r"
   sleep 1
   : $((waittime--))
 done

 echo -e "\nAdding temporary SSH-key for Debian root user..."
 ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 debian@$1 \
    'sudo cat /home/debian/.ssh/authorized_keys | sudo tee /root/.ssh/authorized_keys'

 echo -e "\nDebian inititialisation..."
 ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL'
 export DEBIAN_FRONTEND=noninteractive
 echo "deb http://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware
 deb http://deb.debian.org/debian/ bookworm-updates main contrib non-free non-free-firmware
 deb http://deb.debian.org/debian/ bookworm-backports main contrib non-free non-free-firmware
 deb http://security.debian.org/debian-security/ bookworm-security main contrib non-free non-free-firmware" > /etc/apt/sources.list
 apt-get update && apt-get install -y locales-all
 rm -rf /root/.ssh/
 sync
 reboot
 EOL

 sleep 10
 echo -e "\nDone!"
	#!/bin/bash
	trap "exit" INT
	echo -e "\nHost:"
	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 ubuntu@$1 \
	'uname -a && arch && uptime && sudo touch /home/ubuntu/.hushlogin /root/.hushlogin'

	echo -e "\nAdding temporary SSH-key for Ubuntu root user..."
	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 ubuntu@$1 \
	'sudo cat /home/ubuntu/.ssh/authorized_keys \| sudo tee /root/.ssh/authorized_keys'

	echo -e "\nSystem trimming..."
	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL'
	export DEBIAN_FRONTEND=noninteractive
	snap remove --purge oracle-cloud-agent && snap remove --purge core18
	apt-get purge -y linux-* lxc* lxd* vim* snapd* python*
	apt-get update && apt-get install -y lsof
	apt-get -y autoremove --purge
	apt-get -y autoclean
	rm -rf /var/log/* /var/lib/apt/* /var/cache/apt/*
	df -h
	EOL
	echo "Check free space! for "/" mountpoint. <=700mb"
	waittime=15
	while [ $waittime -gt 0 ]; do
	echo -ne "$waittime\033[0K\r"
	sleep 1
	: $((waittime--))
	done

	echo -e "\nPreparing system..."
	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL'
	cd /
	echo "Mounting tmpfs..."
	mount -t tmpfs -o size=700m tmpfs mnt && tar --one-file-system -c . \| tar -C /mnt -x
	mount --make-private -o remount,rw /
	mount --move dev mnt/dev && mount --move proc mnt/proc
	mount --move run mnt/run && mount --move sys mnt/sys
	sed -i "/^[^#]/d;" mnt/etc/fstab
	echo "tmpfs / tmpfs defaults 0 0" >> mnt/etc/fstab
	cd mnt && mkdir old_root
	mount --make-private /
	sleep 2

	echo "Changing the root mount..."
	unshare -m
	pivot_root . old_root
	sleep 5

	echo "Starting SSH on 1022..."
	iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 1022 -j ACCEPT
	nohup /usr/sbin/sshd -D -p 1022 > /dev/null 2>&1 &
	EOL

	echo -e "\nFlashing the Debian image..."
	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 1022 root@$1 -T <<'EOL'
	echo "Arch is $(arch)..."

	IMAGEMIRROR="https://cloud.debian.org/images/cloud/bookworm"
	IMAGEVERSION="debian-12-genericcloud"
	IMAGEBUILD="20240701-1795"

	for i in agetty dbus-daemon atd iscsid rpcbind unattended-upgrades; do pkill $i; done; kill 1; umount -l /dev/sda1
	if [ $(arch) = "x86_64" ]
	then curl -L $IMAGEMIRROR/$IMAGEBUILD/$IMAGEVERSION-amd64-$IMAGEBUILD.tar.xz \| tar -OJxvf - disk.raw \| dd of=/dev/sda bs=1M;
	elif [ $(arch) = "aarch64" ]
	then curl -L $IMAGEMIRROR/$IMAGEBUILD/$IMAGEVERSION-arm64-$IMAGEBUILD.tar.xz \| tar -OJxvf - disk.raw \| dd of=/dev/sda bs=1M;
	else
	echo Unsported architecture!
	fi
	sleep 5

	echo "Syncing changes to the block storage..."
	sync
	sleep 5

	echo "Rebooting into Debian!"
	nohup sh -c 'echo "1" > /proc/sys/kernel/sysrq && sleep 5 && echo "b" > /proc/sysrq-trigger' > /dev/null 2>&1 &
	EOL

	echo -e "\nWaiting until Debian starts... (3 min)"
	waittime=180
	while [ $waittime -gt 0 ]; do
	echo -ne "$waittime\033[0K\r"
	sleep 1
	: $((waittime--))
	done

	echo -e "\nAdding temporary SSH-key for Debian root user..."
	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 debian@$1 \
	'sudo cat /home/debian/.ssh/authorized_keys \| sudo tee /root/.ssh/authorized_keys'

	echo -e "\nDebian inititialisation..."
	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL'
	export DEBIAN_FRONTEND=noninteractive
	echo "deb http://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware
	deb http://deb.debian.org/debian/ bookworm-updates main contrib non-free non-free-firmware
	deb http://deb.debian.org/debian/ bookworm-backports main contrib non-free non-free-firmware
	deb http://security.debian.org/debian-security/ bookworm-security main contrib non-free non-free-firmware" > /etc/apt/sources.list
	apt-get update && apt-get install -y locales-all
	rm -rf /root/.ssh/
	sync
	reboot
	EOL

	sleep 10
	echo -e "\nDone!"