使用docker环境打包镜像

在linux系统中，经常会出现编译安装软件；然而linux发行版不同编译软件的过程也大不相同，构建出来的二进制软件也不能随意复制使用。使用docker可以很好的解决问题，并且实现一次构建多处使用。

  • dockerfile构建软件

以下使用 ZLMediaKit软件构建为案例说明 dockerfile 编译并且打包镜像

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# 标记此处构建使用容器内构建镜像体 AS build关键词
FROM dockerpull.com/ubuntu:20.04 AS build
#shell,rtmp,rtsp,rtsps,http,https,rtp
EXPOSE 9000/tcp
EXPOSE 8000/tcp
EXPOSE 8000/udp
EXPOSE 1935/tcp
EXPOSE 554/tcp
EXPOSE 322/tcp
EXPOSE 80/tcp
EXPOSE 443/tcp
EXPOSE 10000/udp
EXPOSE 10000/tcp

# 国内Ubuntu软件仓访问速度太慢，使用华为云镜像地址加速处理
RUN sed -i 's/archive.ubuntu.com/mirrors.huaweicloud.com/g' /etc/apt/sources.list
RUN sed -i 's/security.ubuntu.com/mirrors.huaweicloud.com/g' /etc/apt/sources.list
RUN sed -i 's/ports.ubuntu.com/mirrors.huaweicloud.com/g' /etc/apt/sources.list

# 安装必要的软件依赖，包括构建包 gcc cmake等
RUN apt-get update && \
         DEBIAN_FRONTEND="noninteractive" \
         apt-get install -y --no-install-recommends \
         build-essential \
         cmake \
         curl \
         vim \
         ca-certificates \
         tzdata \
         libssl-dev \
         libmysqlclient-dev \
         libx264-dev \
         libfaac-dev \
         libavcodec-dev \
         libavutil-dev \
         ffmpeg \
         yasm && \
         apt-get autoremove -y && \
         apt-get clean -y && \
    rm -rf /var/lib/apt/lists/*

# 创建必要工作目录，需要注意，docker依赖包默认情况是最小化容器，需要自行创建对应的工作目录
RUN mkdir -p /opt/media/ZLMediaKit/ \
    /opt/media/ZLMediaKit/release/linux/Release/ \
    /usr/local/openssl \
    /usr/local/openssl

WORKDIR /opt/media
COPY . /opt/media/ZLMediaKit/

WORKDIR /opt/media/ZLMediaKit/libs
RUN tar -xvf openssl-1.1.1k.tar.gz && tar -xvf libsrtp-2.3.0.tar.gz

WORKDIR /opt/media/ZLMediaKit/libs/openssl-1.1.1k/
RUN ./config shared --openssldir=/usr/local/openssl --prefix=/usr/local/openssl && make && make install

WORKDIR /opt/media/ZLMediaKit/libs/libsrtp-2.3.0/
RUN ./configure --enable-openssl --with-openssl-dir=/usr/local/openssl && make -j8 && make install

WORKDIR /opt/media/ZLMediaKit/build
RUN cmake .. -DENABLE_WEBRTC=true  -DOPENSSL_ROOT_DIR=/usr/local/openssl  -DOPENSSL_LIBRARIES=/usr/local/openssl/lib -DCMAKE_BUILD_TYPE=Release &&\
    make -j4
# 这里是构建镜像真实路径
FROM dockerpull.com/ubuntu:20.04

RUN sed -i 's/archive.ubuntu.com/mirrors.huaweicloud.com/g' /etc/apt/sources.list
RUN sed -i 's/security.ubuntu.com/mirrors.huaweicloud.com/g' /etc/apt/sources.list
RUN sed -i 's/ports.ubuntu.com/mirrors.huaweicloud.com/g' /etc/apt/sources.list

RUN apt-get update && \
         DEBIAN_FRONTEND="noninteractive" \
         apt-get install -y --no-install-recommends \
         vim \
         ca-certificates \
         tzdata \
         libssl-dev \
         libx264-dev \
         libfaac-dev \
         ffmpeg && \
         apt-get autoremove -y && \
         apt-get clean -y && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /opt/media/
# --from=build 语法表示从构建体中直接拷贝，使用构建体可以大大减小镜像层数和体积
COPY --from=build /opt/media/ZLMediaKit/release/linux/Release/MediaServer /opt/media/MediaServer
COPY --from=build /opt/media/ZLMediaKit/default.pem /opt/media/default.pem
COPY --from=build /opt/media/ZLMediaKit/conf/config.ini /opt/media/config.ini
COPY --from=build /opt/media/ZLMediaKit/release/linux/Release/www /opt/media/www
COPY --from=build /opt/media/ZLMediaKit/release/linux/Release/www /opt/media/static

CMD ["/opt/media/MediaServer","-s","/opt/media/default.pem","-c","/opt/media/config.ini"]