f7cf04ac4b
Make sure we call "dnf clean all" to remove the DNF cache, which reduces Docker image size as per the following guidelines: https://github.com/fedora-cloud/Fedora-Dockerfiles/wiki/Guidelines-for-Creating-Dockerfiles A freshly built image is 250 MB smaller than the one on Docker Hub: <none> <none> b8cafc8ff557 16 seconds ago 1.2 GB docker.io/scylladb/scylla-toolchain fedora-29-20190212 d253d45a964c 3 days ago 1.45 GB Message-Id: <20190215142322.12466-1-penberg@scylladb.com>
Official toolchain for ScyllaDB
While we aim to build out-of-the-box on recent distributions, this isn't always possible and not everyone runs a recent distribution. For this reason a version-controlled toolchain is provided as a docker image.
Quick start
If your workstation supports docker (without requiring sudo), you can build and run Scylla easily without setting up the build dependencies beforehand:
./tools/toolchain/dbuild ./configure.py
./tools/toolchain/dbuild ninja build/release/scylla
./tools/toolchain/dbuild ./build/release/scylla --developer-mode 1
The dbuild script
The script dbuild allows you to run any in that toolchain with
the working directory mounted:
./tools/toolchain/dbuild ./configure.py
./tools/toolchain/dbuild ninja
You can adjust the docker run command by adding more flags before the
command to be executed, separating the flags and the command with --.
This can be useful to attach more volumes (for data or ccache) and to
set environment variables:
./tools/toolchain/dbuild -v /var/cache/ccache:/var/cache/ccache -- ninja
The script also works from other directories, so if you have scylla-ccm checked
out alongside scylla, you can write
../scylla/tools/toolchain/dbuild ./ccm ...
You will have access to both scylla and scylla-ccm in the container.
Interactive mode is also supported, using the docker -i and -t flags:
./tools/toolchain/dbuild -it -- bash
this will drop you into a shell, with all of the toolchain accessible.
Obtaining the current toolchain
The toolchain is stored in a file called tools/toolchain/image. Normally,
dbuild will fetch the toolchain automatically. If you want to access
the toolchain explicitly, pull that image:
docker pull $(<tools/toolchain/image)
Building the toolchain
If you add dependencies (to install-dependencies.sh or
seastar/install-dependencies.sh) you should update the toolchain.
Run the command
docker build --no-cache -f tools/toolchain/Dockerfile .
and use the resulting image.
Publishing an image
If you're a maintainer, you can tag the image and push it
using docker push. Tags follow the format
scylladb/scylla-toolchain:fedora-29-[branch-3.0-]20181128. After the
image is pushed, update tools/toolchain/image so new
builds can use it automatically.
For master toolchains, the branch designation is omitted. In a branch, if there is a need to update a toolchain, the branch designation is added to the tag to avoid ambiguity.