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Reduce docker image size to about 20MB by using a multistage build.

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This commit is contained in:
Daniel Patterson 2017-10-31 23:31:32 -04:00
parent eb48945807
commit 19d2e82d15
2 changed files with 22 additions and 28 deletions
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2
.dockerignore Normal file
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@ -0,0 +1,2 @@
test
build

48
docker/Dockerfile
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@ -1,34 +1,20 @@
FROM alpine:3.5
FROM alpine:3.6 as buildstage
RUN mkdir /opt
WORKDIR /opt
ARG DOCKER_TAG
RUN mkdir -p /src && mkdir -p /opt
COPY . /src
WORKDIR /src
RUN NPROC=$(grep -c ^processor /proc/cpuinfo 2>/dev/null || 1) && \
echo "@testing http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories && \
apk update && \
apk upgrade && \
apk add git cmake wget make libc-dev gcc g++ bzip2-dev boost-dev zlib-dev expat-dev lua5.2-dev libtbb@testing libtbb-dev@testing && \
\
echo "Building libstxxl" && \
cd /opt && \
git clone --depth 1 --branch 1.4.1 https://github.com/stxxl/stxxl.git && \
cd stxxl && \
mkdir build && \
cd build && \
cmake -DCMAKE_BUILD_TYPE=Release .. && \
make -j${NPROC} && \
make install
ARG DOCKER_TAG
RUN mkdir /src
COPY . /src
WORKDIR /src
RUN NPROC=$(grep -c ^processor /proc/cpuinfo 2>/dev/null || 1) && \
NPROC=$(grep -c ^processor /proc/cpuinfo 2>/dev/null || 1) && \
echo "Building OSRM ${DOCKER_TAG}" && \
git show --format="%H" | head -n1 > /opt/OSRM_GITSHA && \
echo "Building OSRM gitsha $(cat /opt/OSRM_GITSHA)" && \
mkdir build && \
mkdir -p build && \
cd build && \
BUILD_TYPE="Release" && \
ENABLE_ASSERTIONS="Off" && \
@ -41,13 +27,19 @@ RUN NPROC=$(grep -c ^processor /proc/cpuinfo 2>/dev/null || 1) && \
cd ../profiles && \
cp -r * /opt && \
\
echo "Cleaning up" && \
strip /usr/local/bin/* && \
rm /usr/local/lib/libstxxl* && \
cd /opt && \
apk del boost-dev && \
apk del g++ cmake libc-dev expat-dev zlib-dev bzip2-dev lua5.2-dev git make gcc && \
apk add boost-filesystem boost-program_options boost-regex boost-iostreams boost-thread libgomp lua5.2 expat && \
rm -rf /src /opt/stxxl /usr/local/bin/stxxl_tool /usr/local/lib/libosrm*
rm -rf /src /usr/local/lib/libosrm*
# Multistage build to reduce image size - https://docs.docker.com/engine/userguide/eng-image/multistage-build/#use-multi-stage-builds
# Only the content below ends up in the image, this helps remove /src from the image (which is large)
FROM alpine:3.6 as runstage
RUN mkdir -p /src && mkdir -p /opt
RUN echo "@testing http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories && \
apk update && \
apk add boost-filesystem boost-program_options boost-regex boost-iostreams boost-thread libgomp lua5.2 expat libtbb@testing
COPY --from=buildstage /usr/local /usr/local
COPY --from=buildstage /opt /opt
WORKDIR /opt
EXPOSE 5000