Default to UTF-8 file.encoding

ENV LANG C.UTF-8

RUN set -eux; \

\

arch="$(objdump="$(command -v objdump)" && objdump --file-headers "objdump" | awk -F '[:,]+[[:space:]]+' '1 == "architecture" { print $2 }')"; \

case "$arch" in \

'i386:x86-64') \

downloadUrl='https://github.com/AdoptOpenJDK/openjdk8-upstream-binaries/releases/download/jdk8u292-b10/OpenJDK8U-jdk_x64_linux_8u292b10.tar.gz'; \

;; \

'aarch64') \

downloadUrl='https://github.com/AdoptOpenJDK/openjdk8-upstream-binaries/releases/download/jdk8u292-b10/OpenJDK8U-jdk_aarch64_linux_8u292b10.tar.gz'; \

;; \

*) echo >&2 "error: unsupported architecture: '$arch'"; exit 1 ;; \

esac; \

\

curl -fL -o openjdk.tgz "$downloadUrl"; \

curl -fL -o openjdk.tgz.asc "$downloadUrl.sign"; \

\

export GNUPGHOME="$(mktemp -d)"; \

pre-fetch Andrew Haley's (the OpenJDK 8 and 11 Updates OpenJDK project lead) key so we can verify that the OpenJDK key was signed by it

(https://github.com/docker-library/openjdk/pull/322#discussion_r286839190)

we pre-fetch this so that the signature it makes on the OpenJDK key can survive "import-clean" in gpg

gpg --batch --keyserver keyserver.ubuntu.com --recv-keys EAC843EBD3EFDB98CC772FADA5CD6035332FA671; \

TODO find a good link for users to verify this key is right (https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2019-April/000951.html is one of the only mentions of it I can find); perhaps a note added to https://adoptopenjdk.net/upstream.html would make sense?

no-self-sigs-only: https://salsa.debian.org/debian/gnupg2/commit/c93ca04a53569916308b369c8b218dad5ae8fe07

gpg --batch --keyserver keyserver.ubuntu.com --keyserver-options no-self-sigs-only --recv-keys CA5F11C6CE22644D42C6AC4492EF8D39DC13168F; \

gpg --batch --list-sigs --keyid-format 0xLONG CA5F11C6CE22644D42C6AC4492EF8D39DC13168F \

| tee /dev/stderr \

| grep '0xA5CD6035332FA671' \

| grep 'Andrew Haley'; \

gpg --batch --verify openjdk.tgz.asc openjdk.tgz; \

rm -rf "$GNUPGHOME"; \

\

mkdir -p "$JAVA_HOME"; \

tar --extract \

--file openjdk.tgz \

--directory "$JAVA_HOME" \

--strip-components 1 \

--no-same-owner \

; \

rm openjdk.tgz*; \

\

rm -rf "$JAVA_HOME/jre/lib/security/cacerts"; \

see "update-ca-trust" script which creates/maintains this cacerts bundle

ln -sT /etc/pki/ca-trust/extracted/java/cacerts "$JAVA_HOME/jre/lib/security/cacerts"; \

\

https://github.com/oracle/docker-images/blob/a56e0d1ed968ff669d2e2ba8a1483d0f3acc80c0/OracleJava/java-8/Dockerfile#L17-L19

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; \

\

basic smoke test

javac -version; \

java -version

• 写完之后执行 docker build -t bolingcavalry/centos7.6-jdk8:0.0.1 .即可生成镜像，如果您有 hub.docker.com 的账号，还可以将其推送到中央仓库，给更多人使用

• 用 history 命令看看镜像内容，详情如下，合计五百多兆，已经不小了：

will@Mac-mini$ docker history bolingcavalry/centos7.6-jdk8:0.0.1

IMAGE CREATED CREATED BY SIZE COMMENT

a5dead4a6505 2 days ago /bin/sh -c set -eux; arch="$(objdump… 209MB

<missing> 2 days ago /bin/sh -c #(nop) ENV LANG=C.UTF-8 0B

<missing> 2 days ago /bin/sh -c #(nop) ENV PATH=/usr/java/openjd… 0B

<missing> 2 days ago /bin/sh -c #(nop) ENV JAVA_HOME=/usr/java/o… 0B

<missing> 2 days ago /bin/sh -c set -eux; yum install -y … 144MB

<missing> 2 years ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0B

<missing> 2 years ago /bin/sh -c #(nop) LABEL org.label-schema.sc… 0B

<missing> 2 years ago /bin/sh -c #(nop) ADD file:54b004357379717df… 202MB

• 我这里已经推送到 hub.docker.com 上去了，执行以下命令即可下载到本地：

docker pull bolingcavalry/centos7.6-jdk8:0.0.3

[](

)CentOS7+JDK8+OpenCV4 镜像

• 接下来可以集成 OpenCV4 了，这里有两个关键点需要注意：

1. 受到 JavaCV 依赖的约束，OpenCV 的版本要用 4.5.3

2. OpenCV 编译的时候要求 cmake 版本是 3.x，因此需要下载 cmake 对应版本

• 最终，Dockerfile 内容如下，基础镜像是前面做好的 bolingcavalry/centos7.6-jdk8:0.0.1，先是安装一大堆编译所需的应用，然后下载 cmake 并安装，再下载 OpenCV-4.5.3 版本的源码然后编译，就这么简单（但其间的调试工作还是不少的，不说了，说多了都是泪）：

FROM bolingcavalry/centos7.6-jdk8:0.0.1

RUN echo "export LC_ALL=en_US.UTF-8" >> /etc/profile \

&& source /etc/profile

RUN set -eux; \

yum install -y \

make \

gcc \

gcc-c++ \

gtk+-devel \

gimp-devel \

gimp-devel-tools \

gimp-help-browser \

zlib-devel \

libtiff-devel \

libjpeg-devel \

libpng-devel \

gstreamer-devel \

libavc1394-devel \

libraw1394-devel \

libdc1394-devel \

jasper-devel \

jasper-utils \

swig \

python \

libtool \

【一线大厂Java面试题解析+核心总结学习笔记+最新架构讲解视频+实战项目源码讲义】
浏览器打开：qq.cn.hn/FTf 免费领取

nasm \

build-essential \

ant \

unzip \

;

RUN set -eux; \

curl -fL -o cmake-3.12.2-Linux-x86_64.tar.gz https://cmake.org/files/v3.12/cmake-3.12.2-Linux-x86_64.tar.gz \

&& tar -zxvf cmake-3.12.2-Linux-x86_64.tar.gz \

&& mv cmake-3.12.2-Linux-x86_64 cmake-3.12.2 \

&& ln -sf /cmake-3.12.2/bin/* /usr/bin; \

curl -fL -o opencv-4.5.3.zip https://codeload.github.com/opencv/opencv/zip/4.5.3; \

unzip opencv-4.5.3.zip; \

rm -rf opencv-4.5.3.zip; \

cd opencv-4.5.3; \

mkdir build; \

cd build; \

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..; \

make; \

make install; \

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -DBUILD_TESTS=OFF ..;\

make -j8; \

make install