Overhaul extensively and add test script
This commit is contained in:
Eric Kidd
parent
19406f809a
commit
1bae9725ae
95
Dockerfile
95
Dockerfile
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@ -1,53 +1,37 @@
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# Use Debian 8.0 "Jessie" as the base for our Rust musl toolchain.
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FROM debian:jessie
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# Make sure we have basic dev tools for building C libraries, and any
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# shared library dev packages we'll need, and create a `rust` user in
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# whose home directory we'll install the Rust compilers.
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#
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# Our goal here is to support the musl-libc builds and Cargo builds needed
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# for a large selection of the most popular crates.
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# Make sure we have basic dev tools for building C libraries. Our goal
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# here is to support the musl-libc builds and Cargo builds needed for a
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# large selection of the most popular crates.
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#
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# We also set up a `rust` user by default, in whose account we'll install
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# the Rust toolchain. This user has sudo privileges if you need to install
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# any more software.
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RUN apt-get update && \
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apt-get install -y build-essential sudo git curl file xutils-dev cmake && \
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apt-get install -y \
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build-essential \
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cmake \
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curl \
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file \
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git \
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sudo \
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xutils-dev \
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&& \
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apt-get clean && rm -rf /var/lib/apt/lists/* && \
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useradd rust --user-group --create-home --shell /bin/bash --groups sudo && \
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echo "%sudo ALL=(ALL:ALL) NOPASSWD:ALL" >> /etc/sudoers
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useradd rust --user-group --create-home --shell /bin/bash --groups sudo
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# Set up our path with all the binary directories we're going to create,
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# including those for the musl-gcc toolchain and for our Rust toolchain.
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ENV PATH=/home/rust/.cargo/bin:/usr/local/musl/bin:/usr/local/bin:/usr/bin:/bin
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# Allow sudo without a password.
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ADD sudoers /etc/sudoers.d/nopasswd
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# Build the musl-libc toolchain, which installs itself in /usr/local/musl.
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WORKDIR /musl
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RUN git clone git://git.musl-libc.org/musl && cd musl && \
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./configure && make install
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# Build a static library version of OpenSSL using musl-libc. This is
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# needed by the popular Rust `hyper` crate.
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RUN VERS=1.0.2g && \
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curl -O https://www.openssl.org/source/openssl-$VERS.tar.gz && \
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tar xvzf openssl-$VERS.tar.gz && cd openssl-$VERS && \
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env CC=musl-gcc ./config --prefix=/usr/local/musl && \
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make depend && make && make install
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ENV OPENSSL_INCLUDE_DIR=/usr/local/musl/include/ \
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OPENSSL_LIB_DIR=/usr/local/musl/lib/ \
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OPENSSL_STATIC=1
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# (Please feel free to submit pull requests for musl-libc builds of other C
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# libraries needed by the most popular and common Rust crates, to avoid
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# everybody needing to build them manually.)
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# Delete our musl-libc build directory.
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RUN rm -rf /musl
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# Mount the source code we want to build on /home/rust/src. We do this as
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# user `rust`, which will be uid 1000, gid 1000 outside the container.
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# Run all further code as user `rust`, and create our working directories
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# as the appropriate user.
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USER rust
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WORKDIR /home/rust/src
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RUN mkdir -p /home/rust/libs /home/rust/src
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# Set up our path with all our binary directories, including those for the
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# musl-gcc toolchain and for our Rust toolchain.
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ENV PATH=/home/rust/.cargo/bin:/usr/local/musl/bin:/usr/local/bin:/usr/bin:/bin
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# Install our Rust toolchain and the `musl` target. We patch the
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# command-line we pass to the installer so that it won't attempt to
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@ -56,5 +40,36 @@ WORKDIR /home/rust/src
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# manually.
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RUN curl https://sh.rustup.rs -sSf | sed 's,run "$_file" < /dev/tty,run "$_file" -y,' | sh && \
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rustup default stable && \
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rustup target add x86_64-unknown-linux-musl && \
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echo "[build]\ntarget = \"x86_64-unknown-linux-musl\"\n" >> /home/rust/.cargo/config
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rustup target add x86_64-unknown-linux-musl
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ADD cargo-config.toml /home/rust/.cargo/config
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# We'll build our libraries in subdirectories of /home/rust/libs. Please
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# clean up when you're done.
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WORKDIR /home/rust/libs
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# Build the musl-libc toolchain, which installs itself in /usr/local/musl.
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RUN sudo chown rust:rust /home/rust/libs && \
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git clone git://git.musl-libc.org/musl && cd musl && \
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./configure && make && sudo make install && \
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cd .. && rm -rf musl
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# Build a static library version of OpenSSL using musl-libc. This is
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# needed by the popular Rust `hyper` crate.
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RUN VERS=1.0.2g && \
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curl -O https://www.openssl.org/source/openssl-$VERS.tar.gz && \
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tar xvzf openssl-$VERS.tar.gz && cd openssl-$VERS && \
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env CC=musl-gcc ./config --prefix=/usr/local/musl && \
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env C_INCLUDE_PATH=/usr/local/musl/include/ make depend && \
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make && sudo make install && \
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cd .. && rm -rf openssl-$VERS.tar.gz openssl-$VERS
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ENV OPENSSL_INCLUDE_DIR=/usr/local/musl/include/ \
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OPENSSL_LIB_DIR=/usr/local/musl/lib/ \
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OPENSSL_STATIC=1
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# (Please feel free to submit pull requests for musl-libc builds of other C
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# libraries needed by the most popular and common Rust crates, to avoid
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# everybody needing to build them manually.)
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# Expect our source code to live in /home/rust/src. We'll run the build as
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# user `rust`, which will be uid 1000, gid 1000 outside the container.
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WORKDIR /home/rust/src
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@ -3,13 +3,13 @@
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# An example Dockerfile showing how to add new static C libraries using
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# musl-gcc.
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FROM ekidd/rust-musl-builder:stable
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FROM ekidd/rust-musl-builder
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# Build a static copy of zlib.
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RUN VERS=1.2.8 && \
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mkdir -p /home/rust/libs && cd /home/rust/libs && \
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cd /home/rust/libs && \
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curl -LO http://zlib.net/zlib-$VERS.tar.gz && \
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tar xzf zlib-$VERS.tar.gz && cd zlib-$VERS && \
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CC=musl-gcc ./configure --static --prefix=/usr/local/musl && \
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make && sudo make install && \
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rm -rf /home/rust/libs/zlib-$VERS.tar.gz /home/rust/libs/zlib-$VERS
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cd .. && rm -rf zlib-$VERS.tar.gz zlib-$VERS
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13
README.md
13
README.md
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@ -1,5 +1,7 @@
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# `rust-musl-builder`: Docker container for easily building static Rust binaries
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[](https://hub.docker.com/r/ekidd/rust-musl-builder/)
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Do you want to compile a completely static Rust binary with no external
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dependencies? If so, try:
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@ -38,15 +40,15 @@ installed, you can create a Dockerfile based on this one, and use
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`musl-gcc` to compile the libraries you need. For example:
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```Dockerfile
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FROM ekidd/rust-musl-builder:stable
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FROM ekidd/rust-musl-builder
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RUN VERS=1.2.8 && \
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mkdir -p /home/rust/libs && cd /home/rust/libs && \
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cd /home/rust/libs && \
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curl -LO http://zlib.net/zlib-$VERS.tar.gz && \
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tar xzf zlib-$VERS.tar.gz && cd zlib-$VERS && \
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CC=musl-gcc ./configure --static --prefix=/usr/local/musl && \
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make && sudo make install && \
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rm -rf /home/rust/libs/zlib-$VERS.tar.gz /home/rust/libs/zlib-$VERS
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cd .. && rm -rf zlib-$VERS.tar.gz zlib-$VERS
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```
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This usually involves a bit of experimentation for each new library, but it
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@ -56,6 +58,11 @@ If you need an especially common library, please feel free to submit a pull
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request adding it to the main `Dockerfile`! We'd like to support popular
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Rust crates out of the box.
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## Development notes
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After modifying the image, run `./test-image` to make sure that everything
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works.
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[Alpine Linux container]: https://hub.docker.com/_/alpine/
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[musl-libc]: http://www.musl-libc.org/
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[musl-gcc]: http://www.musl-libc.org/how.html
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@ -0,0 +1,3 @@
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[build]
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# Target musl-libc by default when running Cargo.
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target = "x86_64-unknown-linux-musl"
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@ -0,0 +1,2 @@
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# Allow group sudo to use `sudo` without a password.
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%sudo ALL=(ALL:ALL) NOPASSWD:ALL
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@ -0,0 +1,28 @@
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#!/bin/bash
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# Make bash fail much more aggressively on errors.
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set -euo pipefail
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# Make sure we can build our main container.
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docker build -t ekidd/rust-musl-builder .
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# Make sure we can build our example derived container.
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docker build -t rust-musl-zlib -f Dockerfile.example .
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# Make sure we can build a static executable.
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docker run --rm ekidd/rust-musl-builder bash -c "
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set -euo pipefail
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export USER=rust
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cargo new --vcs none --bin test
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cd test
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cargo build
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echo 'Checking to make sure it is not a dynamic executable'
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if ldd target/x86_64-unknown-linux-musl/debug/test; then
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echo 'Executable is not static!' 1>&2
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echo 'FAIL.' 1>&2
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exit 1
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fi
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"
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# We're good.
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echo 'OK. Tests passed.' 1>&2
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