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Image Layering Best Practices

Last updated: 2022-05-23 16:56:35

    Overview

    This document describes how to build and manage business images in layers and provides best practices for managing container images of all types using TCR.

    Advantages of container image layering

    • Resources are shared to improve the utilization.
    • Image management is standardized to facilitate DevOps implementation.
    • TCR's Ops-free image acceleration easily makes large-scale image distribution faster by 5-10 times.
    • TCR Enterprise has been accessed to Tencent CloudAudit. You can check the logs of read and write operations of instances, namespaces, and image repositories in "Event History".

    Prerequisites

    Before using a private image managed in TCR for application deployment, you need to complete the following preparations:

    Note: This also applies to the existing TCR instances. You only need to modify the image repository address.  
    

    1. F3S Docker Files Overview

    The project consists of the following parts:

    $ tree -L 3 ./f3s-docker-files
    ./f3s-docker-files
    ├── README.md                                       ------  README file
    ├── DockerBuildImages.sh                            ------  Image build script
    ├── 0.base                                          ------  0. Build various types of system images at the base layer
    │   ├── alpine                                      ------    Build the alpine system image at the base layer
    │   │   └── Dockerfile
    │   └── centos-7.8                                  ------    Build the CentOS 7.8 system image at the base layer
    │       ├── Dockerfile
    │       └── centos-7.8.2003-x86_64-docker.tar.xz
    ├─  1.ops                                           ------  1. Build various types of images at the Ops layer
    │   └── Dockerfile-alpine                           ------    Build the alpine image at the Ops layer
    ├── 2.lang                                          ------  2. Build various types of images at the language layer
    │   └── Dockerfile-alpine-kona                      ------    alpine-kona image at the language layer 
    └── 3.app                                           ------  3. Build various types of images at the application layer
      ├── jmeter
      │   ├── Dockerfile-jmeter-base                  ------    Build the jmeter-base image
      │   ├── Dockerfile-jmeter-grafana-reporter      ------    Build the jmeter-grafana-reporter image
      │   ├── Dockerfile-jmeter-master                ------    Build the jmeter-master image
      │   └── Dockerfile-jmeter-slave                 ------    Build the jmeter-slave image
      ├── nginx
      │   ├── Dockerfile-alpine-nginx                 ------    Build the alpine-nginx image
      │   ├── default.conf
      │   └── nginx.conf
      └── skywalking
          └── Dockerfile-alpine-kona-skywalking       ------    Build the alpine-kona-skywalking image
    

    2. Project Resource Description

    2.0 Dockerfile-alpine

    ============ALPINE DOCKER FILE============

    # build
    FROM alpine:3.13
    
    ENV FROM alpine:3.13
    
    # The Alpine image does not contain `tzdata`, so you cannot set the time zone directly via the environment variable `TZ`. To this end, you need to install `tzdata`:
    ENV TZ=Asia/Shanghai
    
    RUN echo 'http://mirrors.tencent.com/alpine/v3.13/main/' > /etc/apk/repositories \
        && echo 'http://mirrors.tencent.com/alpine/v3.13/community/' >> /etc/apk/repositories \
        && apk --no-cache add apache2-utils \
                              bind-tools \
                              bridge-utils \
                              busybox-extras \
                              curl \
                              ebtables \
                              ethtool \
                              fio \
                              fping \
                              iperf3 \
                              iproute2 \
                              iptables \
                              iputils \
                              ipvsadm \
                              jq \
                              lftp \
                              lsof \
                              mtr \
                              netcat-openbsd \
                              net-tools \
                              nmap \
                              procps \
                              psmisc \
                              rsync \
                              smartmontools \
                              strace \
                              sysstat \
                              tcpdump \
                              tree \
                              tzdata \
                              unzip \
                              util-linux \
                              wget \
                              zip  \
        && echo "${TZ}" > /etc/timezone \
        && ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime \
        && rm -rf /var/cache/apk/*
    
    ENV BUILD f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:v3.13
    
    
    # docker build -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:v3.13 .
    

    ============Build, tag and push the base image============

    cd $pwd/0.base/alpine
    docker build -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:v3.13   -f Dockerfile .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:v3.13 
    

    2.1 Dcokerfile-CentOS-7.8

    ============Centos-7.8 DOCKER FILE============

    # build
    # CentOS 7.8 official Dockerfile: https://github.com/CentOS/sig-cloud-instance-images/blob/CentOS-7.8.2003-x86_64/docker/Dockerfile
    # CentOS 7.8 official package: wget https://raw.githubusercontent.com/CentOS/sig-cloud-instance-images/CentOS-7.8.2003-x86_64/docker/centos-7.8.2003-x86_64-docker.tar.xz
    
    FROM scratch
    
    ADD centos-7.8.2003-x86_64-docker.tar.xz /
    
    LABEL name="CentOS Base Image" \
          vendor="CentOS" \
          license="GPLv2" \
          build-date="20200504"
    
    
    # Add some widgets and change the time zone
    RUN set -ex \
        && yum install -y wget \
        && rm -rf /etc/yum.repos.d/CentOS-* \
    # Add the `Tencent yum` source
        && wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo \
        && yum fs filter documentation \
        && yum install -y atop \
                          bind-utils \
                          curl \
                          dstat \
                          ebtables \
                          ethtool \
                          fping \
                          htop \
                          iftop \
                          iproute \
                          jq \
                          less \
                          lsof \
                          mtr \
                          nc \
                          net-tools \
                          nmap-ncat \
                          perf \
                          psmisc \
                          strace \
                          sysstat \
                          tcpdump \
                          telnet \
                          tree \
                          unzip \
                          wget \
                          which \
                          zip \
                          ca-certificates \
        && rm -rf /etc/localtime \
        && ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
    # Install dumb-init
        && wget -O /usr/local/bin/dumb-init https://github.com/Yelp/dumb-init/releases/download/v1.2.5/dumb-init_1.2.5_x86_64 \
        && chmod +x /usr/local/bin/dumb-init \
    # Install gosu grab gosu for easy step-down from root
    # https://github.com/tianon/gosu/releases
        && wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/1.13/gosu-amd64" \
        && chmod +x /usr/local/bin/gosu \
        && gosu nobody true \
    # Install the Chinese language package to solve the VI garbled text issue
        && yum -y install kde-l10n-Chinese glibc-common \
        && localedef -c -f UTF-8 -i zh_CN zh_CN.utf8 \
        && export LC_ALL=zh_CN.utf8 \
        && yum clean all  \
        && rm -rf /tmp/* \
        && rm -rf /var/lib/yum/* \
        && rm -rf /var/cache/yum
    
    # Solve the LESS garbled text issue
    ENV LESSCHARSET utf-8
    
    # Set language environment variables
    ENV LANG=en_US.UTF-8
    
    # If this line is not added, `stdin: true` and `tty: true` in Kubernetes will not take effect
    CMD ["/bin/bash"]
    
    
    ENV BUILD f3s-docker-file.tencentcloudcr.com/f3s-tcr/centos:v7.8
    
    # docker build -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/centos:v7.8 .
    

    ============Build, tag and push the base image============

    cd $pwd/0.base/centos-7.8
    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/centos:v7.8  -f Dockerfile .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/centos:v7.8
    # To test run:  docker run --name test -it --rm f3s-docker-file.tencentcloudcr.com/f3s-tcr/centos:v7.8 uname -a
    # docker export <container-id> | docker import f3s-docker-file.tencentcloudcr.com/f3s-tcr/centos:v7.8
    # quick interative termnal: docker run -it --entrypoint=sh f3s-docker-file.tencentcloudcr.com/f3s-tcr/centos:v7.8 sh
    

    2.2 Dcokerfile-Ops

    ============Ops DOCKER FILE============

    # build
    FROM f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:v3.13
    MAINTAINER westzhao
    
    ENV LANG=C.UTF-8
    
    # Download the Ops tool
    RUN apk --no-progress --purge --no-cache add --upgrade wget \
        curl \
        mysql-client \
        busybox \
        busybox-extras \
        bash \
        bash-doc \
        bash-completion \
        tzdata \
        vim \
        unzip && \
    # Download the glibc to support JDK and solve the Chinese character issue && \
    wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub && \
        wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.33-r0/glibc-2.33-r0.apk && \
        wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.33-r0/glibc-bin-2.33-r0.apk && \
        wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.33-r0/glibc-i18n-2.33-r0.apk && \
        apk add glibc-2.33-r0.apk glibc-bin-2.33-r0.apk glibc-i18n-2.33-r0.apk && \
        rm glibc-2.33-r0.apk glibc-bin-2.33-r0.apk glibc-i18n-2.33-r0.apk && \
        /usr/glibc-compat/bin/localedef -i en_US -f UTF-8 C.UTF-8  && \
        echo "export LANG=$LANG" > /etc/profile.d/locale.sh && \
    # Change the time zone
        mkdir -p /share/zoneinfo/Asia/ && \
        mkdir -p /etc/zoneinfo/Asia/ && \
        cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime  && \
        cp /usr/share/zoneinfo/Asia/Shanghai /share/zoneinfo/Asia/Shanghai && \
        cp /usr/share/zoneinfo/Asia/Shanghai /etc/zoneinfo/Asia/Shanghai && \
        echo "Asia/Shanghai" > /etc/timezone  && \
        apk del tzdata && \
    # Delete the APK cache && \
        rm -rf /var/cache/apk/*
    

    ============Build, tag and push the base image============

    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:latest  -f ./1.ops/Dockerfile-alpine .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:latest
    # To test run:  docker run --name test -it --rm f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:latest sh $(java -version)
    # docker export <container-id> | docker import f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:latest
    # quick interative termnal: docker run -it --entrypoint=sh f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:latest sh
    

    2.3 Dockerfile-alpine-kona

    ============Alpine Kona DOCKER FILE============

    # build
    # build
    FROM f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine:latest
    MAINTAINER westzhao
    
    ENV LANG=C.UTF-8
    
    
    # Download the Kona installation package via wget && \
    RUN cd  /opt && \
    wget https://github.com/Tencent/TencentKona-8/releases/download/8.0.5-GA/TencentKona8.0.5.b12_jdk_linux-x86_64_8u282.tar.gz && \
        tar -xvf TencentKona8.0.5.b12_jdk_linux-x86_64_8u282.tar.gz && \
        rm TencentKona8.0.5.b12_jdk_linux-x86_64_8u282.tar.gz && \
        ln -nfs /opt/TencentKona-8.0.5-282 /opt/jdk && \
    # Trim the unused resources of the JDK && \
    rm /opt/jdk/release && \
        rm /opt/jdk/THIRD_PARTY_README && \
        rm /opt/jdk/LICENSE && \
        rm /opt/jdk/ASSEMBLY_EXCEPTION && \
        rm -rf /opt/jdk/sample/ && \
        rm -rf /opt/jdk/demo/ && \
        rm -rf /opt/jdk/src.zip && \
        rm -rf /opt/jdk/man/ && \
        rm -rf /opt/jdk/lib/missioncontrol  && \
        rm -rf /opt/jdk/lib/visualvm  && \
        rm -rf /opt/jdk/lib/ant-javafx.jar  && \
        rm -rf /opt/jdk/lib/javafx-mx.jar  && \
        rm -rf /opt/jdk/lib/jconsole.jar  && \
        rm -rf /opt/jdk/jre/lib/amd64/libawt_xawt.so  && \
        rm -rf /opt/jdk/jre/lib/amd64/libjavafx_font_freetype.so  && \
        rm -rf /opt/jdk/jre/lib/amd64/libjavafx_font_pango.so  && \
        rm -rf /opt/jdk/jre/lib/amd64/libjavafx_font.so  && \
        rm -rf /opt/jdk/jre/lib/amd64/libjavafx_font_t2k.so  && \
        rm -rf /opt/jdk/jre/lib/amd64/libjavafx_iio.so  && \
        rm -rf /opt/jdk/jre/lib/amd64/libjfxwebkit.so  && \
        rm -rf /opt/jdk/jre/lib/desktop  && \
        rm -rf /opt/jdk/jre/lib/ext/jfxrt.jar  && \
        rm -rf /opt/jdk/jre/lib/fonts  && \
        rm -rf /opt/jdk/jre/lib/locale/de  && \
        rm -rf /opt/jdk/jre/lib/locale/fr  && \
        rm -rf /opt/jdk/jre/lib/locale/it  && \
        rm -rf /opt/jdk/jre/lib/locale/ja  && \
        rm -rf /opt/jdk/jre/lib/locale/ko  && \
        rm -rf /opt/jdk/jre/lib/locale/ko.UTF-8  && \
        rm -rf /opt/jdk/jre/lib/locale/pt_BR  && \
        rm -rf /opt/jdk/jre/lib/locale/sv  && \
        rm -rf /opt/jdk/jre/lib/locale/zh_HK.BIG5HK  && \
        rm -rf /opt/jdk/jre/lib/locale/zh_TW  && \
        rm -rf /opt/jdk/jre/lib/locale/zh_TW.BIG5  && \
        rm -rf /opt/jdk/jre/lib/oblique-fonts  && \
        rm -rf /opt/jdk/jre/lib/deploy.jar  && \
        rm -rf /opt/jdk/jre/lib/locale/
    
    # JAVA_HOME
    ENV JAVA_HOME=/opt/jdk
    ENV CLASSPATH=.:$JAVA_HOME/lib/
    ENV PATH=$JAVA_HOME/bin:$PATH
    

    ============Build, tag and push the base image============

    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona:latest  -f ./2.lang/Dockerfile-alpine-kona .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona:latest
    # To test run:  docker run --name test -it --rm f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona:latest sh $(java -version)
    # docker export <container-id> | docker import f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona:latest
    # quick interative termnal: docker run -it --entrypoint=sh f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona:latest sh
    

    2.4 Dockerfile-alpine-kona-skywalking

    ============Alpine Kona SkyWalking DOCKER FILE============

    # build
    FROM f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona:latest
    MAINTAINER westzhao
    
    ENV LANG=C.UTF-8
    
    # Download the Ops tool
    RUN mkdir /3.app && \
        wget -q -O /3.app/apache-skywalking-apm-8.5.0.tar.gz https://archive.apache.org/dist/skywalking/8.5.0/apache-skywalking-apm-8.5.0.tar.gz && \
        tar zxf /3.app/apache-skywalking-apm-8.5.0.tar.gz -C /3.app && \
        mv /3.app/apache-skywalking-apm-bin/agent /3.app/skywalking && \
        rm -rf /3.app/apache-skywalking-apm-8.5.0.tar.gz && \
        rm -rf /3.app/apache-skywalking-apm-bin/
    
    # JAVA_HOME
    ENV JAVA_HOME=/opt/jdk
    ENV CLASSPATH=.:$JAVA_HOME/lib/
    ENV PATH=$JAVA_HOME/bin:$PATH
    

    ============Build, tag and push the base image============

    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona-skywalking:latest  -f ./3.app/skywalking/Dockerfile-alpine-kona-skywalking .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona-skywalking:latest
    # To test run:  docker run --name test -it --rm f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona-skywalking:latest sh $(java -version)
    # docker export <container-id> | docker import f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona-skywalking:latest
    # quick interative termnal: docker run -it --entrypoint=sh f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona-skywalking:latest sh
    

    2.5 Dockerfile-jmeter-base

    ============JMETER BASE DOCKER FILE============

    # build
    FROM f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona:latest
    MAINTAINER westzhao
    
    ARG JMETER_VERSION=5.4.1
    
    # Download JMeter
    RUN mkdir /jmeter && \
    cd /jmeter && \
    wget https://archive.apache.org/dist/jmeter/binaries/apache-jmeter-$JMETER_VERSION.tgz && \
        tar -xzf apache-jmeter-$JMETER_VERSION.tgz && \
        rm apache-jmeter-$JMETER_VERSION.tgz && \
    # Download JMeterPlugins-Standard && \
    cd /jmeter/apache-jmeter-$JMETER_VERSION/ && \
        wget -q -O /tmp/JMeterPlugins-Standard-1.4.0.zip https://jmeter-plugins.org/downloads/file/JMeterPlugins-Standard-1.4.0.zip && \
        unzip -n /tmp/JMeterPlugins-Standard-1.4.0.zip && \
        rm /tmp/JMeterPlugins-Standard-1.4.0.zip && \
    # Download pepper-box && \
        wget -q -O /jmeter/apache-jmeter-$JMETER_VERSION/lib/ext/pepper-box-1.0.jar https://github.com/raladev/load/blob/master/JARs/pepper-box-1.0.jar?raw=true && \
    # Download bzm-parallel && \
    cd /jmeter/apache-jmeter-$JMETER_VERSION/ && \
        wget -q -O /tmp/bzm-parallel-0.7.zip https://jmeter-plugins.org/files/packages/bzm-parallel-0.7.zip && \
        unzip -n /tmp/bzm-parallel-0.7.zip && \
        rm /tmp/bzm-parallel-0.7.zip
    
    ENV JMETER_HOME /jmeter/apache-jmeter-$JMETER_VERSION/
    
    ENV PATH $JMETER_HOME/bin:$PATH
    

    ============Build, tag and push the base image============

    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-base:latest -f ./3.app/jmeter/Dockerfile-jmeter-base .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-base:latest
    

    2.6 Dockerfile-jmeter-master

    ============JMETER-MASTER DOCKER FILE============

    # build
    FROM f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-base:latest
    MAINTAINER westzhao
    
    EXPOSE 60000
    

    ============Build, tag and push the base image============

    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-master:latest -f ./3.app/jmeter/Dockerfile-jmeter-master .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-master:latest
    

    2.7 Dockerfile-jmeter-slave

    ================JMETER-SLAVES DOCKER FILE=====================

    # build
    FROM f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-base:latest
    MAINTAINER westzhao
    
    EXPOSE 1099 50000
    
    ENTRYPOINT $JMETER_HOME/bin/jmeter-server \
    -Dserver.rmi.localport=50000 \
    -Dserver_port=1099 \
    -Jserver.rmi.ssl.disable=true
    

    ============Build, tag and push the base image============

    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-slave:latest -f ./3.app/jmeter/Dockerfile-jmeter-slave .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-slave:latest
    

    2.8 Dockerfile-jmeter-grafana-reporter

    ================JMETER-GRAFANA-REPORTER DOCKER FILE=====================

    # build
    # Multi-stage builds
    FROM golang:1.14.7-alpine3.12 AS build
    MAINTAINER westzhao
    # Download the Ops and compilation tools
    WORKDIR /go/src/${owner:-github.com/8710925}/reporter
    # ADD . .
    # RUN go install -v github.com/8710925/reporter/cmd/grafana-reporter
    
    RUN apk --no-progress --purge --no-cache add --upgrade git && \
    # Compile grafana-reporter
        git clone https://${owner:-github.com/8710925}/reporter . \
        && go install -v github.com/8710925/reporter/cmd/grafana-reporter
    
    
    # create grafana reporter image
    FROM alpine:3.12
    COPY --from=build /go/src/${owner:-github.com/8710925}/reporter/util/texlive.profile /
    COPY --from=build /go/src/${owner:-github.com/8710925}/reporter/util/SIMKAI.ttf /usr/share/fonts/west/
    
    RUN apk --no-progress --purge --no-cache add --upgrade  wget \
        curl \
        fontconfig \
        unzip \
        tzdata \
        perl-switch && \
        wget -qO- \
        "https://github.com/yihui/tinytex/raw/master/tools/install-unx.sh" | \
        sh -s - --admin --no-path \
        && mv ~/.TinyTeX /opt/TinyTeX \
        && /opt/TinyTeX/bin/*/tlmgr path add \
        && tlmgr path add \
        && chown -R root:adm /opt/TinyTeX \
        && chmod -R g+w /opt/TinyTeX \
        && chmod -R g+wx /opt/TinyTeX/bin \
        && tlmgr update --self --repository http://mirrors.tuna.tsinghua.edu.cn/CTAN/systems/texlive/tlnet \
        && tlmgr install epstopdf-pkg ctex  everyshi everysel euenc \
    # Change the time zone
        && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime  \
        && echo "Asia/Shanghai" > /etc/timezone  \
        && apk del tzdata \
        # Cleanup
        && fmtutil-sys  --all \
        && texhash \
        && mktexlsr \
        && apk del --purge -qq \
        && rm -rf /var/lib/apt/lists/*
    
    COPY --from=build /go/bin/grafana-reporter /usr/local/bin
    
    
    ENTRYPOINT [ "/usr/local/bin/grafana-reporter","-ip","jmeter-grafana:3000" ]
    

    ============Build, tag and push the base image============

    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-grafana-reporter:latest -f ./3.app/jmeter/Dockerfile-jmeter-grafana-reporter .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/jmeter-grafana-reporter:latest
    

    2.9 Dockerfile-alpine-nginx

    ================Alpine Nginx DOCKER FILE=====================

    # build
    FROM f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-kona:latest
    MAINTAINER westzhao
    
    ENV LANG=C.UTF-8
    
    # Download the Ops tool
    RUN apk --no-progress --purge --no-cache add --upgrade nginx && \
    # Delete the APK cache && \
        rm -rf /var/cache/apk/*
    
    COPY ./3.app/nginx/default.conf /etc/nginx/http.d/default.conf
    COPY ./3.app/nginx/nginx.conf /etc/nginx/nginx.conf
    
    EXPOSE 80 443
    
    CMD ["/usr/sbin/nginx", "-g", "daemon off;", "-c", "/etc/nginx/nginx.conf"]
    

    ============Build, tag and push the base image============

    docker build --no-cache -t f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-nginx:latest -f ./3.app/nginx/Dockerfile-alpine-nginx .
    docker push f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-nginx:latest
    # To test run:  docker run --name test -it --rm -p 8888:80 f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-nginx:latest nginx -v
    # docker export <container-id> | docker import f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-nginx:latest
    # quick interative termnal: docker run -it --entrypoint=sh f3s-docker-file.tencentcloudcr.com/f3s-tcr/alpine-nginx:latest sh
    

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