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Minimize Docker image size using multi-stage builds #30

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f9b360a
Initial plan
Copilot Aug 29, 2025
ef5bd54
Implement multi-stage Docker builds to minimize image size
Copilot Aug 29, 2025
6191e7b
Add comprehensive size reduction summary documentation
Copilot Aug 29, 2025
1bae142
Remove OPTIMIZATION.md and SIZE_REDUCTION_SUMMARY.md documentation files
Copilot Aug 30, 2025
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86 changes: 52 additions & 34 deletions Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,45 +1,63 @@
# Build stage
FROM almalinux:9 AS builder

SHELL ["/bin/bash", "-c"]

# install build dependencies
RUN dnf update -y && \
dnf install -y gcc make bison flex automake autoconf diffutils gettext java-11-openjdk-devel && \
dnf clean all

# install sbt
RUN curl -fL https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-pc-linux.gz | gzip -d > cs && \
chmod +x cs && \
echo Y | ./cs setup

# build opensourcecobol4j
RUN cd /root && \
curl -L -o opensourcecobol4j-v1.1.7.tar.gz https://github.com/opensourcecobol/opensourcecobol4j/archive/refs/tags/v1.1.7.tar.gz && \
tar zxvf opensourcecobol4j-v1.1.7.tar.gz && \
cd opensourcecobol4j-1.1.7 && \
./configure --prefix=/usr/ && \
make && \
make install DESTDIR=/tmp/install && \
rm -rf /root/opensourcecobol4j-v1.1.7.tar.gz /root/opensourcecobol4j-1.1.7

# Download postgresql jar
RUN mkdir -p /tmp/install/usr/lib/Open-COBOL-ESQL-4j/ && \
curl -L -o /tmp/install/usr/lib/Open-COBOL-ESQL-4j/postgresql.jar https://jdbc.postgresql.org/download/postgresql-42.2.24.jar

# Build Open COBOL ESQL 4J
ENV PATH="$PATH:/root/.local/share/coursier/bin"
RUN cd /root/ && \
curl -L -o Open-COBOL-ESQL-4j-1.1.1.tar.gz https://github.com/opensourcecobol/Open-COBOL-ESQL-4j/archive/refs/tags/v1.1.1.tar.gz && \
tar zxvf Open-COBOL-ESQL-4j-1.1.1.tar.gz && \
cd Open-COBOL-ESQL-4j-1.1.1 && \
cp /tmp/install/usr/lib/opensourcecobol4j/libcobj.jar dblibj/lib && \
cp /tmp/install/usr/lib/Open-COBOL-ESQL-4j/postgresql.jar dblibj/lib && \
./configure --prefix=/usr/ && \
make && \
make install DESTDIR=/tmp/install && \
rm -rf /root/Open-COBOL-ESQL-4j-1.1.1.tar.gz /root/Open-COBOL-ESQL-4j-1.1.1

# Runtime stage
FROM almalinux:9

SHELL ["/bin/bash", "-c"]

# install runtime dependencies only
RUN dnf update -y && \
dnf install -y java-11-openjdk-headless && \
dnf clean all && \
rm -rf /var/cache/dnf/*

# copy built files from builder stage
COPY --from=builder /tmp/install/usr/ /usr/

# classpath settings
ENV CLASSPATH=:/usr/lib/opensourcecobol4j/libcobj.jar:/usr/lib/Open-COBOL-ESQL-4j/postgresql.jar:/usr/lib/opensourcecobol4j/ocesql4j.jar
RUN echo 'export CLASSPATH=:/usr/lib/opensourcecobol4j/libcobj.jar:/usr/lib/Open-COBOL-ESQL-4j/postgresql.jar:/usr/lib/Open-COBOL-ESQL-4j/ocesql4j.jar' >> ~/.bashrc

# install dependencies
RUN dnf update -y
RUN dnf install -y gcc make bison flex automake autoconf diffutils gettext java-11-openjdk-devel

# install sbt
RUN curl -fL https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-pc-linux.gz | gzip -d > cs && chmod +x cs && echo Y | ./cs setup

# install opensourcecobol4j
RUN cd /root &&\
curl -L -o opensourcecobol4j-v1.1.7.tar.gz https://github.com/opensourcecobol/opensourcecobol4j/archive/refs/tags/v1.1.7.tar.gz &&\
tar zxvf opensourcecobol4j-v1.1.7.tar.gz &&\
cd opensourcecobol4j-1.1.7 &&\
./configure --prefix=/usr/ &&\
make &&\
make install &&\
rm /root/opensourcecobol4j-v1.1.7.tar.gz

# Install Open COBOL ESQL 4J
ENV PATH="$PATH:/root/.local/share/coursier/bin"
RUN mkdir -p /usr/lib/Open-COBOL-ESQL-4j &&\
cd /root/ &&\
curl -L -o Open-COBOL-ESQL-4j-1.1.1.tar.gz https://github.com/opensourcecobol/Open-COBOL-ESQL-4j/archive/refs/tags/v1.1.1.tar.gz &&\
tar zxvf Open-COBOL-ESQL-4j-1.1.1.tar.gz &&\
rm Open-COBOL-ESQL-4j-1.1.1.tar.gz &&\
cd Open-COBOL-ESQL-4j-1.1.1 &&\
mkdir -p /usr/lib/Open-COBOL-ESQL-4j/ &&\
curl -L -o /usr/lib/Open-COBOL-ESQL-4j/postgresql.jar https://jdbc.postgresql.org/download/postgresql-42.2.24.jar &&\
cp /usr/lib/opensourcecobol4j/libcobj.jar dblibj/lib &&\
cp /usr/lib/Open-COBOL-ESQL-4j/postgresql.jar dblibj/lib &&\
./configure --prefix=/usr/ &&\
make &&\
make install &&\
rm -rf /root/Open-COBOL-ESQL-4j-1.1.1

# add sample programs
ADD cobol_sample /root/cobol_sample
ADD ocesql4j_sample /root/ocesql4j_sample
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54 changes: 36 additions & 18 deletions utf8.Dockerfile
View file
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Original file line number Diff line number Diff line change
@@ -1,29 +1,47 @@
# Build stage
FROM almalinux:9 AS builder

SHELL ["/bin/bash", "-c"]

# install build dependencies
RUN dnf update -y && \
dnf install -y gcc make bison flex automake autoconf diffutils gettext java-11-openjdk-devel && \
dnf clean all

# install sbt
RUN curl -fL https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-pc-linux.gz | gzip -d > cs && \
chmod +x cs && \
echo Y | ./cs setup

# build opensourcecobol4j
RUN cd /root && \
curl -L -o opensourcecobol4j-v1.1.7.tar.gz https://github.com/opensourcecobol/opensourcecobol4j/archive/refs/tags/v1.1.7.tar.gz && \
tar zxvf opensourcecobol4j-v1.1.7.tar.gz && \
cd opensourcecobol4j-1.1.7 && \
./configure --prefix=/usr/ --enable-utf8 && \
touch cobj/*.m4 && \
make && \
make install DESTDIR=/tmp/install && \
rm -rf /root/opensourcecobol4j-v1.1.7.tar.gz /root/opensourcecobol4j-1.1.7

# Runtime stage
FROM almalinux:9

SHELL ["/bin/bash", "-c"]

# install runtime dependencies only
RUN dnf update -y && \
dnf install -y java-11-openjdk-headless && \
dnf clean all && \
rm -rf /var/cache/dnf/*

# copy built files from builder stage
COPY --from=builder /tmp/install/usr/ /usr/

# classpath settings
ENV CLASSPATH=:/usr/lib/opensourcecobol4j/libcobj.jar
RUN echo 'export CLASSPATH=:/usr/lib/opensourcecobol4j/libcobj.jar' >> ~/.bashrc

# install dependencies
RUN dnf update -y
RUN dnf install -y gcc make bison flex automake autoconf diffutils gettext java-11-openjdk-devel

# install sbt
RUN curl -fL https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-pc-linux.gz | gzip -d > cs && chmod +x cs && echo Y | ./cs setup

# install opensourcecobol4j
RUN cd /root &&\
curl -L -o opensourcecobol4j-v1.1.7.tar.gz https://github.com/opensourcecobol/opensourcecobol4j/archive/refs/tags/v1.1.7.tar.gz &&\
tar zxvf opensourcecobol4j-v1.1.7.tar.gz &&\
cd opensourcecobol4j-1.1.7 &&\
./configure --prefix=/usr/ --enable-utf8 &&\
touch cobj/*.m4 &&\
make &&\
make install &&\
rm /root/opensourcecobol4j-v1.1.7.tar.gz

# add sample programs
ADD cobol_sample /root/cobol_sample

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