mirror of https://github.com/bitcoin/bitcoin
This reduces the overhead in the git repo due to binary blobs of the png files. Also, the documentation can be updated independent of any tags and release cycles.pull/11401/head
MarcoFalke
7 years ago
parent
8cf88b4aae
commit
fa082b4ee0
@ -1,484 +1,4 @@
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Gitian building
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================
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*Setup instructions for a Gitian build of Bitcoin Core using a Debian VM or physical system.*
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Gitian is the deterministic build process that is used to build the Bitcoin
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Core executables. It provides a way to be reasonably sure that the
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executables are really built from the source on GitHub. It also makes sure that
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the same, tested dependencies are used and statically built into the executable.
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Multiple developers build the source code by following a specific descriptor
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("recipe"), cryptographically sign the result, and upload the resulting signature.
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These results are compared and only if they match, the build is accepted and uploaded
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to bitcoin.org.
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More independent Gitian builders are needed, which is why this guide exists.
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It is preferred you follow these steps yourself instead of using someone else's
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VM image to avoid 'contaminating' the build.
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Table of Contents
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------------------
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- [Create a new VirtualBox VM](#create-a-new-virtualbox-vm)
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- [Connecting to the VM](#connecting-to-the-vm)
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- [Setting up Debian for Gitian building](#setting-up-debian-for-gitian-building)
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- [Installing Gitian](#installing-gitian)
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- [Setting up the Gitian image](#setting-up-the-gitian-image)
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- [Getting and building the inputs](#getting-and-building-the-inputs)
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- [Building Bitcoin Core](#building-bitcoin-core)
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- [Building an alternative repository](#building-an-alternative-repository)
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- [Signing externally](#signing-externally)
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- [Uploading signatures](#uploading-signatures)
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Preparing the Gitian builder host
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---------------------------------
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The first step is to prepare the host environment that will be used to perform the Gitian builds.
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This guide explains how to set up the environment, and how to start the builds.
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Debian Linux was chosen as the host distribution because it has a lightweight install (in contrast to Ubuntu) and is readily available.
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Any kind of virtualization can be used, for example:
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- [VirtualBox](https://www.virtualbox.org/) (covered by this guide)
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- [KVM](http://www.linux-kvm.org/page/Main_Page)
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- [LXC](https://linuxcontainers.org/), see also [Gitian host docker container](https://github.com/gdm85/tenku/tree/master/docker/gitian-bitcoin-host/README.md).
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You can also install Gitian on actual hardware instead of using virtualization.
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Create a new VirtualBox VM
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---------------------------
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In the VirtualBox GUI click "New" and choose the following parameters in the wizard:
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- Type: Linux, Debian (64-bit)
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- Memory Size: at least 3000MB, anything less and the build might not complete.
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- Hard Disk: Create a virtual hard disk now
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- Hard Disk file type: Use the default, VDI (VirtualBox Disk Image)
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- Storage on physical hard disk: Dynamically Allocated
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- File location and size: at least 40GB; as low as 20GB *may* be possible, but better to err on the safe side
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- Click `Create`
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After creating the VM, we need to configure it.
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- Click the `Settings` button, then go to `System` tab and `Processor` sub-tab. Increase the number of processors to the number of cores on your machine if you want builds to be faster.
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- Go to the `Network` tab. Adapter 1 should be attached to `NAT`.
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- 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.
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- Create a new rule by clicking the plus icon.
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- Set up the new rule the following way:
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- Name: `SSH`
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- Protocol: `TCP`
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- Leave Host IP empty
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- Host Port: `22222`
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- Leave Guest IP empty
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- Guest Port: `22`
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- Click `Ok` twice to save.
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Get the [Debian 8.x net installer](http://cdimage.debian.org/mirror/cdimage/archive/8.5.0/amd64/iso-cd/debian-8.5.0-amd64-netinst.iso) (a more recent minor version should also work, see also [Debian Network installation](https://www.debian.org/CD/netinst/)).
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This DVD image can be [validated](https://www.debian.org/CD/verify) using a SHA256 hashing tool, for example on
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Unixy OSes by entering the following in a terminal:
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echo "ad4e8c27c561ad8248d5ebc1d36eb172f884057bfeb2c22ead823f59fa8c3dff debian-8.5.0-amd64-netinst.iso" | sha256sum -c
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# (must return OK)
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Then start the VM. On the first launch you will be asked for a CD or DVD image. Choose the downloaded ISO.
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Installing Debian
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------------------
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This section will explain how to install Debian on the newly created VM.
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- Choose the non-graphical installer. We do not need the graphical environment; it will only increase installation time and disk usage.
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**Note**: Navigating in the Debian installer:
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To keep a setting at the default and proceed, just press `Enter`.
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To select a different button, press `Tab`.
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- Choose locale and keyboard settings (doesn't matter, you can just go with the defaults or select your own information)
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- The VM will detect network settings using DHCP, this should all proceed automatically
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- Configure the network:
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- Hostname `debian`.
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- Leave domain name empty.
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- Choose a root password and enter it twice (remember it for later)
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- Name the new user `debian` (the full name doesn't matter, you can leave it empty)
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- Set the account username as `debian`
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- Choose a user password and enter it twice (remember it for later)
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- The installer will set up the clock using a time server; this process should be automatic
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- Set up the clock: choose a time zone (depends on the locale settings that you picked earlier; specifics don't matter)
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- Disk setup
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- Partitioning method: Guided - Use the entire disk
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- Select disk to partition: SCSI1 (0,0,0)
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- Partition Disks -> *All files in one partition*
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- Finish partitioning and write changes to disk -> *Yes* (`Tab`, `Enter` to select the `Yes` button)
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- The base system will be installed, this will take a minute or so
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- Choose a mirror (any will do)
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- Enter proxy information (unless you are on an intranet, leave this empty)
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- Wait a bit while 'Select and install software' runs
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- Participate in popularity contest -> *No*
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- Choose software to install. We need just the base system.
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- Make sure only 'SSH server' and 'Standard System Utilities' are checked
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- Uncheck 'Debian Desktop Environment' and 'Print Server'
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- Install the GRUB boot loader to the master boot record? -> Yes
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- Device for boot loader installation -> ata-VBOX_HARDDISK
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- Installation Complete -> *Continue*
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- After installation, the VM will reboot and you will have a working Debian VM. Congratulations!
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After Installation
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-------------------
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The next step in the guide involves logging in as root via SSH.
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SSH login for root users is disabled by default, so we'll enable that now.
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Login to the VM using username `root` and the root password you chose earlier.
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You'll be presented with a screen similar to this.
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Type:
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```
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sed -i 's/^PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config
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```
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and press enter. Then,
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```
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/etc/init.d/ssh restart
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```
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and enter to restart SSH. Logout by typing 'logout' and pressing 'enter'.
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Connecting to the VM
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----------------------
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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.
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Connect to `localhost`, port `22222` (or the port configured when installing the VM).
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On Windows you can use [putty](http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html) and [WinSCP](http://winscp.net/eng/index.php).
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For example, to connect as `root` from a Linux command prompt use
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$ ssh root@localhost -p 22222
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The authenticity of host '[localhost]:22222 ([127.0.0.1]:22222)' can't be established.
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RSA key fingerprint is ae:f5:c8:9f:17:c6:c7:1b:c2:1b:12:31:1d:bb:d0:c7.
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Are you sure you want to continue connecting (yes/no)? yes
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Warning: Permanently added '[localhost]:22222' (RSA) to the list of known hosts.
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root@localhost's password: (enter root password configured during install)
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The programs included with the Debian GNU/Linux system are free software;
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the exact distribution terms for each program are described in the
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individual files in /usr/share/doc/*/copyright.
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|
||||
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
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permitted by applicable law.
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root@debian:~#
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Replace `root` with `debian` to log in as user.
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Setting up Debian for Gitian building
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--------------------------------------
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In this section we will be setting up the Debian installation for Gitian building.
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First we need to log in as `root` to set up dependencies and make sure that our
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user can use the sudo command. Type/paste the following in the terminal:
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||||
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||||
```bash
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apt-get install git ruby sudo apt-cacher-ng qemu-utils debootstrap lxc python-cheetah parted kpartx bridge-utils make ubuntu-archive-keyring curl
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adduser debian sudo
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```
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Then set up LXC and the rest with the following, which is a complex jumble of settings and workarounds:
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|
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```bash
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# the version of lxc-start in Debian needs to run as root, so make sure
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# that the build script can execute it without providing a password
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echo "%sudo ALL=NOPASSWD: /usr/bin/lxc-start" > /etc/sudoers.d/gitian-lxc
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echo "%sudo ALL=NOPASSWD: /usr/bin/lxc-execute" >> /etc/sudoers.d/gitian-lxc
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||||
# make /etc/rc.local script that sets up bridge between guest and host
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echo '#!/bin/sh -e' > /etc/rc.local
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||||
echo 'brctl addbr br0' >> /etc/rc.local
|
||||
echo 'ifconfig br0 10.0.3.2/24 up' >> /etc/rc.local
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||||
echo 'iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE' >> /etc/rc.local
|
||||
echo 'echo 1 > /proc/sys/net/ipv4/ip_forward' >> /etc/rc.local
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||||
echo 'exit 0' >> /etc/rc.local
|
||||
# make sure that USE_LXC is always set when logging in as debian,
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||||
# and configure LXC IP addresses
|
||||
echo 'export USE_LXC=1' >> /home/debian/.profile
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||||
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
|
||||
```
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||||
|
||||
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.
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||||
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
|
||||
git clone https://github.com/bitcoin-core/gitian.sigs.git
|
||||
```
|
||||
|
||||
Setting up the Gitian image
|
||||
-------------------------
|
||||
|
||||
Gitian needs a virtual image of the operating system to build in.
|
||||
Currently this is Ubuntu Trusty 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
|
||||
--------------------------------
|
||||
|
||||
At this point you have two options, you can either use the automated script (found in [contrib/gitian-build.sh](/contrib/gitian-build.sh)) or you could manually do everything by following this guide. If you're using the automated script, then run it with the "--setup" command. Afterwards, run it with the "--build" command (example: "contrib/gitian-build.sh -b signer 0.13.0"). Otherwise ignore this.
|
||||
|
||||
Follow the instructions in [doc/release-process.md](release-process.md#fetch-and-create-inputs-first-time-or-when-dependency-versions-change)
|
||||
in the bitcoin repository under 'Fetch and create 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 Core
|
||||
----------------
|
||||
|
||||
To build Bitcoin Core (for Linux, OS X and Windows) just follow the steps under 'perform
|
||||
Gitian builds' in [doc/release-process.md](release-process.md#setup-and-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 trusty 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 trusty --arch amd64
|
||||
|
||||
LXC_ARCH=amd64 LXC_SUITE=trusty on-target -u root apt-get update
|
||||
LXC_ARCH=amd64 LXC_SUITE=trusty on-target -u root \
|
||||
-e DEBIAN_FRONTEND=noninteractive apt-get --no-install-recommends -y install \
|
||||
$( sed -ne '/^packages:/,/[^-] .*/ {/^- .*/{s/"//g;s/- //;p}}' ../bitcoin/contrib/gitian-descriptors/*|sort|uniq )
|
||||
LXC_ARCH=amd64 LXC_SUITE=trusty on-target -u root apt-get -q -y purge grub
|
||||
LXC_ARCH=amd64 LXC_SUITE=trusty on-target -u root -e DEBIAN_FRONTEND=noninteractive apt-get -y dist-upgrade
|
||||
```
|
||||
|
||||
And then set offline mode for apt-cacher-ng:
|
||||
|
||||
```
|
||||
/etc/apt-cacher-ng/acng.conf
|
||||
[...]
|
||||
Offlinemode: 1
|
||||
[...]
|
||||
|
||||
service apt-cacher-ng restart
|
||||
```
|
||||
|
||||
Then when building, override the remote URLs that gbuild would otherwise pull from the Gitian descriptors::
|
||||
```bash
|
||||
|
||||
cd /some/root/path/
|
||||
git clone https://github.com/bitcoin-core/bitcoin-detached-sigs.git
|
||||
|
||||
BTCPATH=/some/root/path/bitcoin
|
||||
SIGPATH=/some/root/path/bitcoin-detached-sigs
|
||||
|
||||
./bin/gbuild --url bitcoin=${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-core/gitian.sigs](https://github.com/bitcoin-core/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.
|
||||
This file was moved to [the Bitcoin Core documentation repository](https://github.com/bitcoin-core/docs/blob/master/gitian-building.md) at [https://github.com/bitcoin-core/docs](https://github.com/bitcoin-core/docs).
|
||||
|
||||
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Reference in new issue