mirror of
https://github.com/bitcoin/bitcoin.git
synced 2025-02-18 11:57:37 -05:00
471 lines
18 KiB
Markdown
471 lines
18 KiB
Markdown
Gitian building
|
|
================
|
|
|
|
*Setup instructions for a Gitian build of Bitcoin using a Debian VM or physical system.*
|
|
|
|
Gitian is the deterministic build process that is used to build the Bitcoin
|
|
Core executables. It provides a way to be reasonably sure that the
|
|
executables are really built from the source on GitHub. It also makes sure that
|
|
the same, tested dependencies are used and statically built into the executable.
|
|
|
|
Multiple developers build the source code by following a specific descriptor
|
|
("recipe"), cryptographically sign the result, and upload the resulting signature.
|
|
These results are compared and only if they match, the build is accepted and uploaded
|
|
to bitcoin.org.
|
|
|
|
More independent Gitian builders are needed, which is why this guide exists.
|
|
It is preferred you follow these steps yourself instead of using someone else's
|
|
VM image to avoid 'contaminating' the build.
|
|
|
|
Table of Contents
|
|
------------------
|
|
|
|
- [Create a new VirtualBox VM](#create-a-new-virtualbox-vm)
|
|
- [Connecting to the VM](#connecting-to-the-vm)
|
|
- [Setting up Debian for Gitian building](#setting-up-debian-for-gitian-building)
|
|
- [Installing Gitian](#installing-gitian)
|
|
- [Setting up the Gitian image](#setting-up-the-gitian-image)
|
|
- [Getting and building the inputs](#getting-and-building-the-inputs)
|
|
- [Building Bitcoin](#building-bitcoin)
|
|
- [Building an alternative repository](#building-an-alternative-repository)
|
|
- [Signing externally](#signing-externally)
|
|
- [Uploading signatures](#uploading-signatures)
|
|
|
|
Preparing the Gitian builder host
|
|
---------------------------------
|
|
|
|
The first step is to prepare the host environment that will be used to perform the Gitian builds.
|
|
This guide explains how to set up the environment, and how to start the builds.
|
|
|
|
Debian Linux was chosen as the host distribution because it has a lightweight install (in contrast to Ubuntu) and is readily available.
|
|
Any kind of virtualization can be used, for example:
|
|
- [VirtualBox](https://www.virtualbox.org/) (covered by this guide)
|
|
- [KVM](http://www.linux-kvm.org/page/Main_Page)
|
|
- [LXC](https://linuxcontainers.org/), see also [Gitian host docker container](https://github.com/gdm85/tenku/tree/master/docker/gitian-bitcoin-host/README.md).
|
|
|
|
You can also install Gitian on actual hardware instead of using virtualization.
|
|
|
|
Create a new VirtualBox VM
|
|
---------------------------
|
|
In the VirtualBox GUI click "Create" and choose the following parameters in the wizard:
|
|
|
|
|
|
|
|
- Type: Linux, Debian (64-bit)
|
|
|
|
|
|
|
|
- Memory Size: at least 1024MB, anything less will really slow down the build.
|
|
|
|
|
|
|
|
- Hard Disk: Create a virtual hard disk now
|
|
|
|
|
|
|
|
- Hard Disk file type: Use the default, VDI (VirtualBox Disk Image)
|
|
|
|
|
|
|
|
- Storage on physical hard disk: Dynamically Allocated
|
|
|
|
|
|
|
|
- File location and size: at least 40GB; as low as 20GB *may* be possible, but better to err on the safe side
|
|
- Click `Create`
|
|
|
|
Get the [Debian 8.x net installer](http://cdimage.debian.org/debian-cd/8.2.0/amd64/iso-cd/debian-8.2.0-amd64-netinst.iso) (a more recent minor version should also work, see also [Debian Network installation](https://www.debian.org/CD/netinst/)).
|
|
This DVD image can be validated using a SHA256 hashing tool, for example on
|
|
Unixy OSes by entering the following in a terminal:
|
|
|
|
echo "d393d17ac6b3113c81186e545c416a00f28ed6e05774284bb5e8f0df39fcbcb9 debian-8.2.0-amd64-netinst.iso" | sha256sum -c
|
|
# (must return OK)
|
|
|
|
After creating the VM, we need to configure it.
|
|
|
|
- Click the `Settings` button, then go to the `Network` tab. Adapter 1 should be attached to `NAT`.
|
|
|
|
|
|
|
|
- Click `Advanced`, then `Port Forwarding`. We want to set up a port through which we can reach the VM to get files in and out.
|
|
- Create a new rule by clicking the plus icon.
|
|
|
|
|
|
|
|
- Set up the new rule the following way:
|
|
- Name: `SSH`
|
|
- Protocol: `TCP`
|
|
- Leave Host IP empty
|
|
- Host Port: `22222`
|
|
- Leave Guest IP empty
|
|
- Guest Port: `22`
|
|
|
|
- Click `Ok` twice to save.
|
|
|
|
Then start the VM. On the first launch you will be asked for a CD or DVD image. Choose the downloaded iso.
|
|
|
|
|
|
|
|
Installing Debian
|
|
------------------
|
|
|
|
This section will explain how to install Debian on the newly created VM.
|
|
|
|
- Choose the non-graphical installer. We do not need the graphical environment; it will only increase installation time and disk usage.
|
|
|
|
|
|
|
|
**Note**: Navigating in the Debian installer:
|
|
To keep a setting at the default and proceed, just press `Enter`.
|
|
To select a different button, press `Tab`.
|
|
|
|
- Choose locale and keyboard settings (doesn't matter, you can just go with the defaults or select your own information)
|
|
|
|
|
|
|
|
|
|
|
|
- The VM will detect network settings using DHCP, this should all proceed automatically
|
|
- Configure the network:
|
|
- Hostname `debian`.
|
|
- Leave domain name empty.
|
|
|
|
|
|
|
|
- Choose a root password and enter it twice (remember it for later)
|
|
|
|
|
|
|
|
- Name the new user `debian` (the full name doesn't matter, you can leave it empty)
|
|
- Set the account username as `debian`
|
|
|
|
|
|
|
|
|
|
- Choose a user password and enter it twice (remember it for later)
|
|
|
|
|
|
|
|
- The installer will set up the clock using a time server; this process should be automatic
|
|
- Set up the clock: choose a time zone (depends on the locale settings that you picked earlier; specifics don't matter)
|
|
|
|
|
|
|
|
- Disk setup
|
|
- Partitioning method: Guided - Use the entire disk
|
|
|
|
|
|
|
|
- Select disk to partition: SCSI1 (0,0,0)
|
|
|
|
|
|
|
|
- Finish partitioning and write changes to disk -> *Yes* (`Tab`, `Enter` to select the `Yes` button)
|
|
|
|
|
|
|
|
|
|
- The base system will be installed, this will take a minute or so
|
|
- Choose a mirror (any will do)
|
|
|
|
|
|
|
|
- Enter proxy information (unless you are on an intranet, leave this empty)
|
|
|
|
|
|
|
|
- Wait a bit while 'Select and install software' runs
|
|
- Participate in popularity contest -> *No*
|
|
- Choose software to install. We need just the base system.
|
|
- Make sure only 'SSH server' and 'Standard System Utilities' are checked
|
|
- Uncheck 'Debian Desktop Environment' and 'Print Server'
|
|
|
|
|
|
|
|
- Install the GRUB boot loader to the master boot record? -> Yes
|
|
|
|
|
|
|
|
- Device for boot loader installation -> ata-VBOX_HARDDISK
|
|
|
|
|
|
|
|
- Installation Complete -> *Continue*
|
|
- After installation, the VM will reboot and you will have a working Debian VM. Congratulations!
|
|
|
|
|
|
|
|
|
|
After Installation
|
|
-------------------
|
|
The next step in the guide involves logging in as root via SSH.
|
|
SSH login for root users is disabled by default, so we'll enable that now.
|
|
|
|
Login to the VM using username `root` and the root password you chose earlier.
|
|
You'll be presented with a screen similar to this.
|
|
|
|
|
|
|
|
Type:
|
|
|
|
```
|
|
sed -i 's/^PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config
|
|
```
|
|
and press enter. Then,
|
|
```
|
|
/etc/init.d/ssh restart
|
|
```
|
|
and enter to restart SSH. Logout by typing 'logout' and pressing 'enter'.
|
|
|
|
Connecting to the VM
|
|
----------------------
|
|
|
|
After the VM has booted you can connect to it using SSH, and files can be copied from and to the VM using a SFTP utility.
|
|
Connect to `localhost`, port `22222` (or the port configured when installing the VM).
|
|
On Windows you can use [putty](http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html) and [WinSCP](http://winscp.net/eng/index.php).
|
|
|
|
For example, to connect as `root` from a Linux command prompt use
|
|
|
|
$ ssh root@localhost -p 22222
|
|
The authenticity of host '[localhost]:22222 ([127.0.0.1]:22222)' can't be established.
|
|
RSA key fingerprint is ae:f5:c8:9f:17:c6:c7:1b:c2:1b:12:31:1d:bb:d0:c7.
|
|
Are you sure you want to continue connecting (yes/no)? yes
|
|
Warning: Permanently added '[localhost]:22222' (RSA) to the list of known hosts.
|
|
root@localhost's password: (enter root password configured during install)
|
|
|
|
The programs included with the Debian GNU/Linux system are free software;
|
|
the exact distribution terms for each program are described in the
|
|
individual files in /usr/share/doc/*/copyright.
|
|
|
|
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
|
|
permitted by applicable law.
|
|
root@debian:~#
|
|
|
|
Replace `root` with `debian` to log in as user.
|
|
|
|
Setting up Debian for Gitian building
|
|
--------------------------------------
|
|
|
|
In this section we will be setting up the Debian installation for Gitian building.
|
|
|
|
First we need to log in as `root` to set up dependencies and make sure that our
|
|
user can use the sudo command. Type/paste the following in the terminal:
|
|
|
|
```bash
|
|
apt-get install git ruby sudo apt-cacher-ng qemu-utils debootstrap lxc python-cheetah parted kpartx bridge-utils make ubuntu-archive-keyring
|
|
adduser debian sudo
|
|
```
|
|
|
|
Then set up LXC and the rest with the following, which is a complex jumble of settings and workarounds:
|
|
|
|
```bash
|
|
# the version of lxc-start in Debian 7.4 needs to run as root, so make sure
|
|
# that the build script can execute it without providing a password
|
|
echo "%sudo ALL=NOPASSWD: /usr/bin/lxc-start" > /etc/sudoers.d/gitian-lxc
|
|
# add cgroup for LXC
|
|
echo "cgroup /sys/fs/cgroup cgroup defaults 0 0" >> /etc/fstab
|
|
# make /etc/rc.local script that sets up bridge between guest and host
|
|
echo '#!/bin/sh -e' > /etc/rc.local
|
|
echo 'brctl addbr br0' >> /etc/rc.local
|
|
echo 'ifconfig br0 10.0.3.2/24 up' >> /etc/rc.local
|
|
echo 'exit 0' >> /etc/rc.local
|
|
# make sure that USE_LXC is always set when logging in as debian,
|
|
# and configure LXC IP addresses
|
|
echo 'export USE_LXC=1' >> /home/debian/.profile
|
|
echo 'export GITIAN_HOST_IP=10.0.3.2' >> /home/debian/.profile
|
|
echo 'export LXC_GUEST_IP=10.0.3.5' >> /home/debian/.profile
|
|
reboot
|
|
```
|
|
|
|
At the end the VM is rebooted to make sure that the changes take effect. The steps in this
|
|
section only need to be performed once.
|
|
|
|
Installing Gitian
|
|
------------------
|
|
|
|
Re-login as the user `debian` that was created during installation.
|
|
The rest of the steps in this guide will be performed as that user.
|
|
|
|
There is no `python-vm-builder` package in Debian, so we need to install it from source ourselves,
|
|
|
|
```bash
|
|
wget http://archive.ubuntu.com/ubuntu/pool/universe/v/vm-builder/vm-builder_0.12.4+bzr494.orig.tar.gz
|
|
echo "76cbf8c52c391160b2641e7120dbade5afded713afaa6032f733a261f13e6a8e vm-builder_0.12.4+bzr494.orig.tar.gz" | sha256sum -c
|
|
# (verification -- must return OK)
|
|
tar -zxvf vm-builder_0.12.4+bzr494.orig.tar.gz
|
|
cd vm-builder-0.12.4+bzr494
|
|
sudo python setup.py install
|
|
cd ..
|
|
```
|
|
|
|
**Note**: When sudo asks for a password, enter the password for the user *debian* not for *root*.
|
|
|
|
Clone the git repositories for bitcoin and Gitian.
|
|
|
|
```bash
|
|
git clone https://github.com/devrandom/gitian-builder.git
|
|
git clone https://github.com/bitcoin/bitcoin
|
|
```
|
|
|
|
Setting up the Gitian image
|
|
-------------------------
|
|
|
|
Gitian needs a virtual image of the operating system to build in.
|
|
Currently this is Ubuntu Precise x86_64.
|
|
This image will be copied and used every time that a build is started to
|
|
make sure that the build is deterministic.
|
|
Creating the image will take a while, but only has to be done once.
|
|
|
|
Execute the following as user `debian`:
|
|
|
|
```bash
|
|
cd gitian-builder
|
|
bin/make-base-vm --lxc --arch amd64 --suite trusty
|
|
```
|
|
|
|
There will be a lot of warnings printed during the build of the image. These can be ignored.
|
|
|
|
**Note**: When sudo asks for a password, enter the password for the user *debian* not for *root*.
|
|
|
|
Getting and building the inputs
|
|
--------------------------------
|
|
|
|
Follow the instructions in [doc/release-process.md](release-process.md#fetch-and-build-inputs-first-time-or-when-dependency-versions-change)
|
|
in the bitcoin repository under 'Fetch and build inputs' to install sources which require
|
|
manual intervention. Also optionally follow the next step: 'Seed the Gitian sources cache
|
|
and offline git repositories' which will fetch the remaining files required for building
|
|
offline.
|
|
|
|
Building Bitcoin
|
|
----------------
|
|
|
|
To build Bitcoin (for Linux, OS X and Windows) just follow the steps under 'perform
|
|
Gitian builds' in [doc/release-process.md](release-process.md#perform-gitian-builds) in the bitcoin repository.
|
|
|
|
This may take some time as it will build all the dependencies needed for each descriptor.
|
|
These dependencies will be cached after a successful build to avoid rebuilding them when possible.
|
|
|
|
At any time you can check the package installation and build progress with
|
|
|
|
```bash
|
|
tail -f var/install.log
|
|
tail -f var/build.log
|
|
```
|
|
|
|
Output from `gbuild` will look something like
|
|
|
|
Initialized empty Git repository in /home/debian/gitian-builder/inputs/bitcoin/.git/
|
|
remote: Counting objects: 57959, done.
|
|
remote: Total 57959 (delta 0), reused 0 (delta 0), pack-reused 57958
|
|
Receiving objects: 100% (57959/57959), 53.76 MiB | 484.00 KiB/s, done.
|
|
Resolving deltas: 100% (41590/41590), done.
|
|
From https://github.com/bitcoin/bitcoin
|
|
... (new tags, new branch etc)
|
|
--- Building for precise amd64 ---
|
|
Stopping target if it is up
|
|
Making a new image copy
|
|
stdin: is not a tty
|
|
Starting target
|
|
Checking if target is up
|
|
Preparing build environment
|
|
Updating apt-get repository (log in var/install.log)
|
|
Installing additional packages (log in var/install.log)
|
|
Grabbing package manifest
|
|
stdin: is not a tty
|
|
Creating build script (var/build-script)
|
|
lxc-start: Connection refused - inotify event with no name (mask 32768)
|
|
Running build script (log in var/build.log)
|
|
|
|
Building an alternative repository
|
|
-----------------------------------
|
|
|
|
If you want to do a test build of a pull on GitHub it can be useful to point
|
|
the Gitian builder at an alternative repository, using the same descriptors
|
|
and inputs.
|
|
|
|
For example:
|
|
```bash
|
|
URL=https://github.com/laanwj/bitcoin.git
|
|
COMMIT=2014_03_windows_unicode_path
|
|
./bin/gbuild --commit bitcoin=${COMMIT} --url bitcoin=${URL} ../bitcoin/contrib/gitian-descriptors/gitian-linux.yml
|
|
./bin/gbuild --commit bitcoin=${COMMIT} --url bitcoin=${URL} ../bitcoin/contrib/gitian-descriptors/gitian-win.yml
|
|
./bin/gbuild --commit bitcoin=${COMMIT} --url bitcoin=${URL} ../bitcoin/contrib/gitian-descriptors/gitian-osx.yml
|
|
```
|
|
|
|
Building fully offline
|
|
-----------------------
|
|
|
|
For building fully offline including attaching signatures to unsigned builds, the detached-sigs repository
|
|
and the bitcoin git repository with the desired tag must both be available locally, and then gbuild must be
|
|
told where to find them. It also requires an apt-cacher-ng which is fully-populated but set to offline mode, or
|
|
manually disabling gitian-builder's use of apt-get to update the VM build environment.
|
|
|
|
To configure apt-cacher-ng as an offline cacher, you will need to first populate its cache with the relevant
|
|
files. You must additionally patch target-bin/bootstrap-fixup to set its apt sources to something other than
|
|
plain archive.ubuntu.com: us.archive.ubuntu.com works.
|
|
|
|
So, if you use LXC:
|
|
|
|
```bash
|
|
export PATH="$PATH":/path/to/gitian-builder/libexec
|
|
export USE_LXC=1
|
|
cd /path/to/gitian-builder
|
|
./libexec/make-clean-vm --suite precise --arch amd64
|
|
|
|
LXC_ARCH=amd64 LXC_SUITE=precise on-target -u root apt-get update
|
|
LXC_ARCH=amd64 LXC_SUITE=precise on-target -u root \
|
|
-e DEBIAN_FRONTEND=noninteractive apt-get --no-install-recommends -y install \
|
|
$( sed -ne '/^packages:/,/[^-] .*/ {/^- .*/{s/"//g;s/- //;p}}' ../bitcoin/contrib/gitian-descriptors/*|sort|uniq )
|
|
LXC_ARCH=amd64 LXC_SUITE=precise on-target -u root apt-get -q -y purge grub
|
|
LXC_ARCH=amd64 LXC_SUITE=precise on-target -u root -e DEBIAN_FRONTEND=noninteractive apt-get -y dist-upgrade
|
|
```
|
|
|
|
And then set offline mode for apt-cacher-ng:
|
|
|
|
```
|
|
/etc/apt-cacher-ng/acng.conf
|
|
[...]
|
|
Offlinemode: 1
|
|
[...]
|
|
|
|
service apt-cacher-ng restart
|
|
```
|
|
|
|
Then when building, override the remote URLs that gbuild would otherwise pull from the Gitian descriptors::
|
|
```bash
|
|
|
|
cd /some/root/path/
|
|
git clone https://github.com/bitcoin/bitcoin-detached-sigs.git
|
|
|
|
BTCPATH=/some/root/path/bitcoin.git
|
|
SIGPATH=/some/root/path/bitcoin-detached-sigs.git
|
|
|
|
./bin/gbuild --url bitcoin=${BTCPATH},signature=${SIGPATH} ../bitcoin/contrib/gitian-descriptors/gitian-win-signer.yml
|
|
```
|
|
|
|
Signing externally
|
|
-------------------
|
|
|
|
If you want to do the PGP signing on another device, that's also possible; just define `SIGNER` as mentioned
|
|
and follow the steps in the build process as normal.
|
|
|
|
gpg: skipped "laanwj": secret key not available
|
|
|
|
When you execute `gsign` you will get an error from GPG, which can be ignored. Copy the resulting `.assert` files
|
|
in `gitian.sigs` to your signing machine and do
|
|
|
|
```bash
|
|
gpg --detach-sign ${VERSION}-linux/${SIGNER}/bitcoin-linux-build.assert
|
|
gpg --detach-sign ${VERSION}-win/${SIGNER}/bitcoin-win-build.assert
|
|
gpg --detach-sign ${VERSION}-osx-unsigned/${SIGNER}/bitcoin-osx-build.assert
|
|
```
|
|
|
|
This will create the `.sig` files that can be committed together with the `.assert` files to assert your
|
|
Gitian build.
|
|
|
|
Uploading signatures
|
|
---------------------
|
|
|
|
After building and signing you can push your signatures (both the `.assert` and `.assert.sig` files) to the
|
|
[bitcoin/gitian.sigs](https://github.com/bitcoin/gitian.sigs/) repository, or if that's not possible create a pull
|
|
request. You can also mail the files to Wladimir (laanwj@gmail.com) and he will commit them.
|