Dockerfile

# Copyright (c) 2019, 2024 Oracle and/or its affiliates.
#
# Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.
#
# ORACLE DOCKERFILES PROJECT
# --------------------------
# This is the Dockerfile for Oracle Server JRE 8
#
# REQUIRED FILES TO BUILD THIS IMAGE
# ----------------------------------
#
# (1) server-jre-8uXX-linux-x64.tar.gz
#     Download from https://www.oracle.com/java/technologies/downloads/
#
# HOW TO BUILD THIS IMAGE
# -----------------------
# Put the downloaded file in the same directory as this Dockerfile
# Run:
#      $ docker build -t oracle/serverjre:8 .
#
# This command is already scripted in build.sh so you can alternatively run
#      $ bash build.sh
#
# The builder image will be used to uncompress the tar.gz file with the Java Runtime.

FROM oraclelinux:7-slim AS builder

LABEL maintainer="Aurelio Garcia-Ribeyro <aurelio.garciaribeyro@oracle.com>"

# Since the files are compressed as tar.gz, first install gzip and tar
RUN yum install -y gzip tar

# Default to UTF-8 file.encoding
ENV LANG=en_US.UTF-8

# Environment variables for the builder image.
# Required to validate that you are using the correct file
ENV JAVA_HOME=/usr/java/jdk-8

COPY server-jre-8u*-linux-x64.tar.gz /tmp/jdk.tgz
SHELL ["/bin/bash", "-o", "pipefail", "-c"]
RUN set -eux; \
    JAVA_SHA256=7c9a3a87045c226647c09bc1eb1fc832f99a9105dbc924cfeab3bf16b3504d24; \
    echo "$JAVA_SHA256 */tmp/jdk.tgz" | sha256sum -c -; \
    mkdir -p "$JAVA_HOME"; \
    tar --extract --file /tmp/jdk.tgz --directory "$JAVA_HOME" --strip-components 1;

## Get a fresh version of Oracle Linux 7-slim for the final image
FROM oraclelinux:7-slim

# Default to UTF-8 file.encoding
ENV LANG=en_US.UTF-8

ENV JAVA_HOME=/usr/java/jdk-8
ENV PATH="$JAVA_HOME/bin:$PATH"

# Copy the uncompressed Java Runtime from the builder image
COPY --from=builder $JAVA_HOME $JAVA_HOME

##
RUN yum -y update; \
    rm -rf /var/cache/yum; \
    ln -sfT "$JAVA_HOME" /usr/java/default; \
    ln -sfT "$JAVA_HOME" /usr/java/latest; \
    for bin in "$JAVA_HOME/bin/"*; do \
        base="$(basename "$bin")"; \
        [ ! -e "/usr/bin/$base" ] && alternatives --install "/usr/bin/$base" "$base" "$bin" 20000; \
    done; \
    java -Xshare:dump;