java8jdk docker 环境

FROM docker.jintdev.com/containers/alpine:3.9

# A few reasons for installing distribution-provided OpenJDK:
#
#  1. Oracle.  Licensing prevents us from redistributing the official JDK.
#
#  2. Compiling OpenJDK also requires the JDK to be installed, and it gets
#     really hairy.
#
#     For some sample build times, see Debian's buildd logs:
#       https://buildd.debian.org/status/logs.php?pkg=openjdk-8

# Default to UTF-8 file.encoding
ENV LANG C.UTF-8

# add a simple script that can auto-detect the appropriate JAVA_HOME value
# based on whether the JDK or only the JRE is installed
RUN { \
		echo '#!/bin/sh'; \
		echo 'set -e'; \
		echo; \
		echo 'dirname "$(dirname "$(readlink -f "$(which javac || which java)")")"'; \
	} > /usr/local/bin/docker-java-home \
	&& chmod +x /usr/local/bin/docker-java-home
ENV JAVA_HOME /usr/lib/jvm/java-1.8-openjdk
ENV PATH $PATH:/usr/lib/jvm/java-1.8-openjdk/jre/bin:/usr/lib/jvm/java-1.8-openjdk/bin

ENV JAVA_VERSION 8u242
ENV JAVA_ALPINE_VERSION 8.242.08-r0

RUN set -x \
	&& apk add --no-cache \
		openjdk8="$JAVA_ALPINE_VERSION" tini curl \
	&& [ "$JAVA_HOME" = "$(docker-java-home)" ] \
	&& curl -L https://maven.aliyun.com/repository/public/io/prometheus/jmx/jmx_prometheus_javaagent/0.13.0/jmx_prometheus_javaagent-0.13.0.jar > /jmx_prometheus_javaagent-0.13.0.jar \
	&& echo ''>/etc/jmx_config.yaml

COPY docker-entrypoint.sh  /
ENTRYPOINT ["/sbin/tini", "--", "/docker-entrypoint.sh"]

# If you're reading this and have any feedback on how this image could be
# improved, please open an issue or a pull request so we can discuss it!
#
#   https://github.com/docker-library/openjdk/issues


#!/bin/bash
set -eo pipefail
shopt -s nullglob

java_tool_env() {
    local exporterPort=11111
    if [ $JMX_EXPORTER_PORT ]; then
        exporterPort=$JMX_EXPORTER_PORT
    fi
    local exporterConfig=/etc/jmx_config.yaml
    if [ $JMX_EXPORTER_CONFIG ]; then
        exporterConfig=$JMX_EXPORTER_CONFIG
    fi
    export JAVA_TOOL_OPTIONS="-javaagent:/jmx_prometheus_javaagent-0.13.0.jar=${exporterPort}:${exporterConfig}"
}

[ -z $DISABLE_JMX_EXPORTER ] && java_tool_env

# 若执行 java, 移除 CMD /bin/sh -c 前缀
if [[ "$1" =~ sh$ ]] && [[ "$2" = "-c" ]] && [[ "$3" = "java" ]]; then
    exec "$BASH_SOURCE" "${@:3}"
fi

# 若CMD以 jar 或 war 文件开始，则直接调用java传入默认参数
if [[ "$1" =~ \.jar$|\.war$ ]]; then
    set -- java -Dsun.misc.URLClassPath.disableJarChecking=true -Djava.security.egd=file:/dev/./urandom $JAVA_OPTS -jar "$@"
fi

# Spring boot
if [[ "$1" = "org.springframework.boot.loader.JarLauncher" ]]; then
    set -- java -Djava.security.egd=file:/dev/./urandom $JAVA_OPTS "$@"
fi

exec "$@"