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Building

Table of Contents

  1. Build with Docker (choose this if not sure)
  2. Build with Nix
  3. Manual

Build with Docker

Requirements

  1. docker

In order to build a binary for aleph-node using docker we first need to install docker itself, i.e. in case of the Ubuntu Linux distribution, by executing sudo apt install docker.io (please consult your distribution's manual describing docker installation procedure). Build procedure can be invoked by running:

sudo docker build -t aleph-build -f nix/Dockerfile.build .
sudo docker run -ti --volume=$(pwd):/node/build aleph-build

Binary will be stored at $(pwd)/result/bin/aleph-node. In order to build just the aleph-runtime, execute:

sudo docker run -ti --volume=$(pwd):/node/build --env CRATES='{ "aleph-runtime" = []; }' aleph-build`.

Build with Nix

Requirements

  1. nix
  2. glibc in version ≥ 2.31

The docker approach described above is based on the nix package manager. We can spawn a shell instance within that docker container that includes references to all build dependencies of aleph-node. Within it we can call cargo build. This way, our docker instance maintains all build artifacts inside of project's root directory, which allows to speed up ongoing build invocations, i.e. next time one invokes cargo build it should take significantly less time.

# spawn nix-shell inside of our docker image
docker run -ti --volume=$(pwd):/node/build --entrypoint="nix-shell" aleph-build --pure
# if your `target` directory contains some artifacts that were not created using this procedure, we first remove them
# otherwise you might receive errors claiming that you are using wrong version of glibc
cargo clean
# build `aleph-node` and store it at the root of the aleph-node's source directory
cargo build --release --package aleph-node
# set the proper loader (nix related)
patchelf --set-interpreter /lib64/ld-linux-x86-64.so.2 target/release/aleph-node

If you have nix installed locally, you can simply call nix-shell --pure. It should spawn a shell containing all build dependencies. Within it, you can call cargo build --release -p aleph-node. Keep in mind that a binary created this way will depend on loader referenced by nix and not the default one used by your system. In order to fix it, assuming that your loader is stored at /lib64/ld-linux-x86-64.so.2, you can execute patchelf --set-interpreter /lib64/ld-linux-x86-64.so.2 <path to aleph-node>. Alternatively, you can use our nix-build script (used by docker based approach), i.q. nix/nix-build.sh.

Note: we recommend using direnv together with nix-direnv for setting up nix-shell. This way you can use your preferred shell, instead of one provided by nix-shell. Example configuration for direnv. Copy it into .envrc file and then run direnv-allow:

# installs nix-direnv, https://github.com/nix-community/nix-direnv
if ! has nix_direnv_version || ! nix_direnv_version 2.1.0; then
  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.1.0/direnvrc" "sha256-FAT2R9yYvVg516v3LiogjIc8YfsbWbMM/itqWsm5xTA="
fi
use nix

Manual

These are build dependencies we use in our linux images for aleph-node:

rust-nightly-2021-10-24
bash-4.4
glibc-2.31
binutils-2.36,1
clang-11.0.0rc2
protobuf-3.13.0
openssl-1.1.1g
git-2.28.0
nss-cacert-3.56
pkg-config-0.29.2
rocksdb-6.29.3

Version of the rust toolchain is specified by the rust-toolchain file within this repository. You can use rustup to install a specific version of rust, including its custom compilation targets. Using rustup, it should set a proper toolchain automatically while you call rustup show within project's root directory. Naturally, we can try to use different versions of these dependencies, i.e. delivered by system's default package manager (we provide a short guide below). Notice, that the nix based approach is not referencing any of the gcc compiler tools, where for example ubuntu's package build-essential already includes gcc. It might influence some of the build scripts of our build dependencies and it might be necessary to carefully craft some of the environment flags related with the build process, like CXXFLAGS etc. Example build procedure using Ubuntu 20.04 LTS and bash shell:

sudo apt install build-essential curl git clang libclang-dev pkg-config libssl-dev protobuf-compiler
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source "$HOME/.cargo/env"
git clone https://github.com/Cardinal-Cryptography/aleph-node.git
cd aleph-node
rustup show
rustup target add x86_64-unknown-linux-gnu wasm32-unknown-unknown
cargo build --release

If cargo build --release does not succeed but throws an error mentioning Rust WASM toolchain not installed, please install it!, then please issue the rustup target add wasm32-unknown-unknown command inside of the aleph-node directory.

After a successful build the binary can be found in target/release/aleph-node.