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Save stroebs/54fc09734a3911e91eeeb43434f117df to your computer and use it in GitHub Desktop.
| #!/bin/bash | |
| # | |
| # Digital Ocean Ubuntu 18.04 x64 Droplet with "Regular Intel" CPU. | |
| # Running: | |
| # git clone https://gist.github.com/54fc09734a3911e91eeeb43434f117df.git | |
| # cd 54fc09734a3911e91eeeb43434f117df/ | |
| # chmod +x make-chr.sh | |
| # ./make-chr.sh | |
| # | |
| # Once the reboot is done, login with root/CHANGEME and change the password! | |
| # You might get a "Segmentation fault" on line 56 while the image is being written. | |
| # Most of the time this is absolutely fine. Reboot the droplet and attempt to login using Winbox. | |
| # If it didn't work, just trash the droplet and try it again. | |
| # | |
| wget http://download2.mikrotik.com/routeros/6.37/chr-6.37.img.zip -O chr.img.zip && \ | |
| gunzip -c chr.img.zip > chr.img && \ | |
| apt-get update && \ | |
| apt install -y qemu-utils pv && \ | |
| qemu-img convert chr.img -O qcow2 chr.qcow2 && \ | |
| qemu-img resize chr.qcow2 1073741824 && \ | |
| modprobe nbd && \ | |
| qemu-nbd -c /dev/nbd0 chr.qcow2 && \ | |
| echo "Give some time for qemu-nbd to be ready" && \ | |
| sleep 2 && \ | |
| partprobe /dev/nbd0 && \ | |
| sleep 5 && \ | |
| mount /dev/nbd0p2 /mnt && \ | |
| ADDRESS=`ip addr show eth0 | grep global | cut -d' ' -f 6 | head -n 1` && \ | |
| GATEWAY=`ip route list | grep default | cut -d' ' -f 3` && \ | |
| PASSWORD="CHANGEME" && \ | |
| echo "/ip address add address=$ADDRESS interface=[/interface ethernet find where name=ether1] | |
| /ip route add gateway=$GATEWAY | |
| /ip service disable telnet | |
| /user set 0 name=root password=$PASSWORD | |
| /ip dns set servers=1.1.1.1,1.0.0.1 | |
| /system package update install | |
| " > /mnt/rw/autorun.scr && \ | |
| umount /mnt && \ | |
| echo "Magic constant is 65537 (second partition address). You can check it with fdisk before appliyng this" && \ | |
| echo "This scary sequence removes seconds partition on nbd0 and creates new, but bigger one" && \ | |
| echo -e 'd\n2\nn\np\n2\n65537\n\nw\n' | fdisk /dev/nbd0 && \ | |
| e2fsck -f -y /dev/nbd0p2 || true && \ | |
| resize2fs /dev/nbd0p2 && \ | |
| sleep 1 && \ | |
| echo "Compressing to gzip, this can take several minutes" && \ | |
| mount -t tmpfs tmpfs /mnt && \ | |
| pv /dev/nbd0 | gzip > /mnt/chr-extended.gz && \ | |
| sleep 1 && \ | |
| killall qemu-nbd && \ | |
| sleep 1 && \ | |
| echo u > /proc/sysrq-trigger && \ | |
| echo "Warming up sleep" && \ | |
| sleep 1 && \ | |
| echo "Writing raw image, this will take time" && \ | |
| zcat /mnt/chr-extended.gz | pv > /dev/vda && \ | |
| echo "Don't forget your password: $PASSWORD" && \ | |
| echo "Sleep 5 seconds (if lucky)" && \ | |
| sleep 5 || true && \ | |
| echo "sync disk" && \ | |
| echo s > /proc/sysrq-trigger && \ | |
| echo "Ok, reboot" && \ | |
| echo b > /proc/sysrq-trigger |
These are my customizations and I have successfully installed them on Ubuntu 20.04
Good luck
#!/bin/bash
wget https://download.mikrotik.com/routeros/7.14.1/chr-7.14.1.img.zip -O chr.img.zip &&
gunzip -c chr.img.zip > chr.img &&
apt-get update &&
apt install -y qemu-utils pv &&
qemu-img convert chr.img -O qcow2 chr.qcow2 &&
qemu-img resize chr.qcow2 1073741824 &&
modprobe nbd &&
qemu-nbd -c /dev/nbd0 chr.qcow2 &&
echo "Give some time for qemu-nbd to be ready" &&
sleep 2 &&
partprobe /dev/nbd0 &&
sleep 5 &&
mount /dev/nbd0p2 /mnt &&
ADDRESS=ip addr show eth0 | grep global | cut -d' ' -f 6 | head -n 1 &&
GATEWAY=ip route list | grep default | cut -d' ' -f 3 &&
echo "/ip address add address=$ADDRESS interface=[/interface ethernet find where name=ether1]
/ip route add gateway=$GATEWAY
/ip service disable telnet
/ip dns set servers=1.1.1.1,1.0.0.1
" > /mnt/rw/autorun.scr &&
umount /mnt &&
echo "Magic constant is 65537 (second partition address). You can check it with fdisk before appliyng this" &&
echo "This scary sequence removes seconds partition on nbd0 and creates new, but bigger one" &&
echo -e 'd\n2\nn\np\n2\n65537\n\nw\n' | fdisk /dev/nbd0 &&
e2fsck -f -y /dev/nbd0p2 || true &&
resize2fs /dev/nbd0p2 &&
sleep 1 &&
echo "Compressing to gzip, this can take several minutes" &&
mount -t tmpfs tmpfs /mnt &&
pv /dev/nbd0 | gzip > /mnt/chr-extended.gz &&
sleep 1 &&
killall qemu-nbd &&
sleep 1 &&
echo u > /proc/sysrq-trigger &&
echo "Warming up sleep" &&
sleep 1 &&
echo "Writing raw image, this will take time" &&
zcat /mnt/chr-extended.gz | pv > /dev/vda &&
echo "Don't forget your password: $PASSWORD" &&
echo "Sleep 5 seconds (if lucky)" &&
sleep 5 || true &&
echo "sync disk" &&
echo s > /proc/sysrq-trigger &&
echo "Ok, reboot" &&
echo b > /proc/sysrq-trigger
@nhan6310 excuse me, i want to ask, i have followed your guide, but in the last part, at the "zcat /mnt/chr-extended.gz | pv > /dev/vda &&",
i got an error "pv: write failed: No space left on device"
how can i solve this?
god dammit it works flawlessly on ubuntu 24.04. i was using docker compose to run L2TP, but somehow it doesn't work as a vpn server. with your solution it's working. thank you!
Extra notes: you need to login as admin@<IP_ADDRESS> to access with empty password.
Digital Ocean supports custom images: https://docs.digitalocean.com/products/images/custom-images/ which should be used instead of this script where possible. MikroTik CHR disk images have been tested to work with this method. The script will remain here as historical reference.