From a51121f63e1ac9169409c6950e196fe0335facaa Mon Sep 17 00:00:00 2001 From: Timothy Redaelli Date: Fri, 26 Jun 2015 20:04:19 +0200 Subject: [PATCH] Initial commit --- LICENSE.md | 336 +++++++++++++++++++++++++++++++++++++++++++++++++++++ README.md | 86 ++++++++++++++ vps2arch | 192 ++++++++++++++++++++++++++++++ 3 files changed, 614 insertions(+) create mode 100644 LICENSE.md create mode 100644 README.md create mode 100755 vps2arch diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..4c1d5d6 --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,336 @@ +GNU General Public License +========================== + +_Version 2, June 1991_ +_Copyright © 1989, 1991 Free Software Foundation, Inc.,_ +_51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA_ + +Everyone is permitted to copy and distribute verbatim copies +of this license document, but changing it is not allowed. + +### Preamble + +The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) You can apply it to +your programs, too. + +When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + +To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + +For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. 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To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + +The precise terms and conditions for copying, distribution and +modification follow. + +### TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + +**0.** This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The “Program”, below, +refers to any such program or work, and a “work based on the Program” +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term “modification”.) 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The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + +**1.** You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + +**2.** You may modify your copy or copies of the Program or any portion +of it, thus forming a work based on the Program, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + +* **a)** You must cause the modified files to carry prominent notices +stating that you changed the files and the date of any change. +* **b)** You must cause any work that you distribute or publish, that in +whole or in part contains or is derived from the Program or any +part thereof, to be licensed as a whole at no charge to all third +parties under the terms of this License. +* **c)** If the modified program normally reads commands interactively +when run, you must cause it, when started running for such +interactive use in the most ordinary way, to print or display an +announcement including an appropriate copyright notice and a +notice that there is no warranty (or else, saying that you provide +a warranty) and that users may redistribute the program under +these conditions, and telling the user how to view a copy of this +License. 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But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + +**3.** You may copy and distribute the Program (or a work based on it, +under Section 2) in object code or executable form under the terms of +Sections 1 and 2 above provided that you also do one of the following: + +* **a)** Accompany it with the complete corresponding machine-readable +source code, which must be distributed under the terms of Sections +1 and 2 above on a medium customarily used for software interchange; or, +* **b)** Accompany it with a written offer, valid for at least three +years, to give any third party, for a charge no more than your +cost of physically performing source distribution, a complete +machine-readable copy of the corresponding source code, to be +distributed under the terms of Sections 1 and 2 above on a medium +customarily used for software interchange; or, +* **c)** Accompany it with the information you received as to the offer +to distribute corresponding source code. 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In such case, this License incorporates +the limitation as if written in the body of this License. + +**9.** The Free Software Foundation may publish revised and/or new versions +of the General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + +Each version is given a distinguishing version number. If the Program +specifies a version number of this License which applies to it and “any +later version”, you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + +**10.** If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + +### NO WARRANTY + +**11.** BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + +**12.** IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + +END OF TERMS AND CONDITIONS + +### How to Apply These Terms to Your New Programs + +If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + +To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the “copyright” line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w` and `show c` should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c`; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a “copyright disclaimer” for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/README.md b/README.md new file mode 100644 index 0000000..67e652b --- /dev/null +++ b/README.md @@ -0,0 +1,86 @@ +VPS2Arch +======== + +The fastest way to convert a _VPS_ to [Arch Linux](https://www.archlinux.org/)! + +Author +------ + +[Timothy Redaelli](mailto:tredaelli@archlinux.info) + +Description +----------- + +This script is used to convert a _VPS_, running another linux distro, to _Arch Linux_. +It should be **only** used if your _VPS_ provider doesn't provide you an _Arch Linux_ image. + +Disclaimer +---------- + +> I'm not responsible for any damage in your system and/or any violation of the agreement between you and your vps provider. +> **Use at your own risk!** + +How To +------ + +Download the script on your _VPS_ and execute it with root privileges + +**WARNING** The script will **delete** any data in your _VPS_! + + wget http://git.io/vps2arch + chmod +x vps2arch + ./vps2arch + +How does it work? +----------------- + +It's Black Magic. +Just kiddin' 😏, the script itself is very simple. + +In a nutshell, it will download the _Arch Linux Bootstrap Image_ and (see the [wiki](https://wiki.archlinux.org/index.php/Install_from_existing_Linux#Method_B:_Using_the_Bootstrap_Image_.28recommended.29)), +extract the image to / and configure the _Bootstrap chroot_. + +Now, about the **critical** part: + +> How can you wipe the system without breaking everything? + +It's simple: the script downloads and installs [busybox](http://www.busybox.net/) in the _Bootstrap chroot_. + +After that, it will erase all the system directories except from the _Bootstrap chroot_, `/dev`, `/proc`, `/sys` and the like . + +Busybox is statically linked, so it can still be used to chroot to the _Bootstrap chroot_ and to install _Arch Linux_. + +At this point _Arch Linux_ has been installed, but not configured. +The script will provide a SSH-able system automagically configuring grub, network and restoring the root password from the original system. + +Once done doing its job, the script will ask you to manually reboot your _VPS_ and voilà, PROFIT! + +Does it really work? +-------------------- + +Yes, it does! + +For the time being, the script has been tested on the following linux distros: + +* CentOS 6 (x86 and x86_64) +* CentOS 7 (x86 and x86_64) + +on the following _VPS_ providers: + +* [CloudAtCost](http://www.cloudatcost.com/) + +Contributing +------------ + +If you have any useful modification, please use **Pull requests**. +If you have successfully used this script on a different _distro_ - _VPS_ combination, please contact me so that I can update the above list. + +If you are not a developer, but you still want to contribute, you can donate me an account on your _VPS_ provider and I'll do my best to support it. +Or you can just donate me some bucks I'll spend to buy a _VPS_ on your provider in order to support it. + +Caveats +------- + +[OpenVZ](http://openvz.org/), [Virtuozzo](http://www.odin.com/products/virtuozzo/), [Docker](https://www.docker.com/) or any other similar _VPS_ systems are not supported (for the time being). + +In other words, it'll only work on **fully virtualized** systems. diff --git a/vps2arch b/vps2arch new file mode 100755 index 0000000..267040b --- /dev/null +++ b/vps2arch @@ -0,0 +1,192 @@ +#!/bin/sh + +# Copyright 2015, Timothy Redaelli + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 2 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License at for +# more details. + +: ${ARCH_MIRROR="http://mirror.rackspace.com/archlinux"} + +# You don't need to edit anything below this comment + +set -e + +# Gathering informations about actual environment. +if which wget >/dev/null 2>&1; then + alias download='wget -nv -O-' +elif which curl >/dev/null 2>&1; then + alias download='curl -fL' +else + echo "This script needs curl or wget" >&2 + exit 2 +fi + +cpu_type=$(uname -m) +findmnt -no SOURCE / | grep -q '^/dev/mapper/' && needs_lvm2=1 || needs_lvm2=0 + +download_and_extract_bootstrap() { + local sha1 filename + download "$ARCH_MIRROR"/iso/latest/sha1sums.txt | grep "$cpu_type.tar.gz" > "sha1sums.txt" + read -r sha1 filename < "sha1sums.txt" + download "$ARCH_MIRROR/iso/latest/$filename" > "$filename" + sha1sum -c sha1sums.txt || exit 1 + tar -xpzf "$filename" + rm -f "$filename" + cp -R /etc/resolv.conf "/root.$cpu_type/etc" + mount --rbind /dev "/root.$cpu_type/dev" + mount -t proc proc "/root.$cpu_type/proc" + mount -t sysfs sys "/root.$cpu_type/sys" + # FIXME support multiple partitions + mount --bind / "/root.$cpu_type/mnt" + findmnt /boot >/dev/null && mount --bind /boot "/root.$cpu_type/mnt/boot" + # Workaround for Debian + mkdir -p "/root.$cpu_type/run/shm" +} + +chroot_exec() { + chroot "/root.$cpu_type" /bin/bash -c "$*" +} + +configure_chroot() { + # Install and initialize haveged if needed + if ! pidof haveged >/dev/null; then + download "https://www.archlinux.org/packages/extra/$cpu_type/haveged/download/" > "/root.$cpu_type/haveged.pkg.tar.xz" + chroot_exec 'pacman --noconfirm -U /haveged.pkg.tar.xz && haveged' + rm -f "/root.$cpu_type/haveged.pkg.tar.xz" + fi + # FIXME support multiple mirrors + echo 'Server = '"$ARCH_MIRROR"'/$repo/os/$arch' >> "/root.$cpu_type/etc/pacman.d/mirrorlist" + chroot_exec 'pacman-key --init && pacman-key --populate archlinux' + + # Generate fstab + chroot_exec 'genfstab /mnt >> /etc/fstab' +} + +save_root_pass() { + grep '^root:' /etc/shadow > "/root.$cpu_type/root.passwd" + chmod 0600 "/root.$cpu_type/root.passwd" +} + +download_and_install_busybox() { + download "https://www.archlinux.org/packages/community/$cpu_type/busybox/download/" > "/root.$cpu_type/busybox.pkg.tar.xz" + chroot_exec 'pacman --noconfirm -U /busybox.pkg.tar.xz' + rm -f "/root.$cpu_type/busybox.pkg.tar.xz" +} + +delete_all() { + # Delete *all* files from / + find / \( ! -path '/dev/*' -and ! -path '/proc/*' -and ! -path '/sys/*' -and ! -path '/selinux/*' -and ! -path "/root.$cpu_type/*" \) -delete 2>/dev/null || true +} + +install_packages() { + local packages="base grub openssh" + if [ $needs_lvm2 -eq 1 ]; then + packages="$packages lvm2" + fi + # You can't use chroot_exec here, because the root filesystem was deleted! + "/root.$cpu_type/usr/bin/busybox" chroot "/root.$cpu_type" /usr/bin/pacstrap /mnt $packages + cp -L "/root.$cpu_type/etc/resolv.conf" /etc +} + +restore_root_pass() { + sed -i '/^root:/d' /etc/shadow + cat "/root.$cpu_type/root.passwd" >> /etc/shadow +} + +cleanup() { + mv "/root.$cpu_type/etc/fstab" "/etc/fstab" + awk "/\/root.$cpu_type/ {print \$2}" /proc/mounts | sort -r | xargs umount -nl + rm -rf "/root.$cpu_type/" +} + +configure_bootloader() { + local root_dev=$(findmnt -no SOURCE /) root_devs= tmp= + + # If you are still using eth* as interface name, disable "strange" ifnames + if grep -q '^\s*eth' /proc/net/dev; then + sed -i.bak 's/GRUB_CMDLINE_LINUX_DEFAULT="/&net.ifnames=0 /' /etc/default/grub + fi + + if [ $needs_lvm2 -eq 1 ]; then + local vg + # Some distro doesn't use lvmetad by default + sed -i.bak 's/use_lvmetad = 1/use_lvmetad = 0/g' /etc/lvm/lvm.conf + vg=$(lvs --noheadings $root_dev | awk '{print $2}') + root_dev=$(pvs --noheadings | awk -v vg="$vg" '($2 == vg) { print $1 }') + fi + for root_dev in $root_dev; do + tmp=$(lsblk -npsro NAME "$root_dev" | tail -n1) + case " $root_devs " in + *" $tmp "*) ;; + *) root_devs="${root_devs:+$root_devs }$tmp" ;; + esac + done + grub-mkconfig > /boot/grub/grub.cfg + for root_dev in $root_devs; do + grub-install --target=i386-pc --recheck "$root_dev" + done + + if [ $needs_lvm2 -eq 1 ]; then + mv /etc/lvm/lvm.conf.bak /etc/lvm/lvm.conf + sed -i '/HOOKS/s/block/& lvm2/' /etc/mkinitcpio.conf + mkinitcpio -p linux + fi +} + +configure_network() { + local gateway dev ip + + read -r _ _ gateway _ dev <<-EOF + $(ip route show 0.0.0.0/0) + EOF + + ip=$(ip addr show dev "$dev" | awk '($1 == "inet") { print $2 }') + + cat > /etc/systemd/network/default.network <<-EOF + [Match] + Name=$dev + + [Address] + Address=$ip + + [Route] + Gateway=$gateway + EOF + + systemctl enable systemd-networkd sshd +} + +finalize() { + cat <<-EOF + Hi, + your VM has successfully been reimaged with Arch Linux. + + This script configured grub as bootloader and systemd-networkd for networking. + + When you are finished with your post-installation, you'll need to reboot the VM the rough way: + # sync ; reboot -f + + Then you'll be able to connect to your VM using SSH and to login using your old root password. + EOF +} + +cd / +download_and_extract_bootstrap +configure_chroot +save_root_pass +download_and_install_busybox +delete_all +install_packages +restore_root_pass +cleanup +configure_bootloader +configure_network +finalize