我不能用官方的镜像，因为我需要在小伙伴构建的 debian 镜像上面安装 dotnet sdk 用来做构建，其实在 docker 里面需要找到一个个文件，然后复制代码

这是小伙伴做的一个 jenkins 的镜像 jenkins/slave 我需要在这个镜像基础上安装 dotnet 进行构建

FROM jenkins/slave

在安装 dotnet 之前需要通过官方 https://github.com/dotnet/dotnet-docker 找到对应的 docker 文件，这样可以进行复制，可以看到官方是引用下面代码 buildpack-deps:buster-scm 这个库

FROM buildpack-deps:buster-scm 

需要找到 buildpack-deps:buster-scm 的代码

找到这个库的代码 https://github.com/docker-library/buildpack-deps/blob/b0fc01aa5e3aed6820d8fed6f3301e0542fbeb36/buster/curl/Dockerfile 可以复制，但是这个库依赖 FROM buildpack-deps:buster-curl 这个库，通过 docker hub 找到 https://github.com/docker-library/buildpack-deps/blob/b0fc01aa5e3aed6820d8fed6f3301e0542fbeb36/buster/curl/Dockerfile 也可以复制

# https://github.com/docker-library/buildpack-deps/blob/b0fc01aa5e3aed6820d8fed6f3301e0542fbeb36/buster/curl/Dockerfile
# FROM debian:buster
RUN apt-get update && apt-get install -y --no-install-recommends \ca-certificates \curl \netbase \wget \&& rm -rf /var/lib/apt/lists/*RUN set -ex; \if ! command -v gpg > /dev/null; then \apt-get update; \apt-get install -y --no-install-recommends \gnupg \dirmngr \; \rm -rf /var/lib/apt/lists/*; \fi# FROM buildpack-deps:buster-curl
# https://github.com/docker-library/buildpack-deps/blob/99a1c33fda559272e9322b02a5d778bbd04154e7/buster/scm/Dockerfile
# procps is very common in build systems, and is a reasonably small package
RUN apt-get update && apt-get install -y --no-install-recommends \git \mercurial \openssh-client \subversion \\procps \&& rm -rf /var/lib/apt/lists/*

使用 dotnet 官方地址下载速度太慢了，我请了小伙伴帮我下载，然后我将 dotnet-sdk-3.1.102-linux-x64.tar.gz 和 PowerShell.Linux.x64.7.0.0-rc.2.nupkg 放在 docker 文件相同文件夹

接下来是复制 dotnet 的代码

# https://raw.githubusercontent.com/dotnet/dotnet-docker/74c92451ecbd2876280ad51736a6eea4e98a1fb2/3.1/sdk/buster/amd64/Dockerfile
# FROM buildpack-deps:buster-scm
ENV \# Enable detection of running in a containerDOTNET_RUNNING_IN_CONTAINER=true \# Enable correct mode for dotnet watch (only mode supported in a container)DOTNET_USE_POLLING_FILE_WATCHER=true \# Skip extraction of XML docs - generally not useful within an image/container - helps performanceNUGET_XMLDOC_MODE=skip \# PowerShell telemetry for docker image usagePOWERSHELL_DISTRIBUTION_CHANNEL=PSDocker-DotnetCoreSDK-Debian-10# Install .NET CLI dependencies
RUN apt-get update \&& apt-get install -y --no-install-recommends \libc6 \libgcc1 \libgssapi-krb5-2 \libicu63 \libssl1.1 \libstdc++6 \zlib1g \&& rm -rf /var/lib/apt/lists/*# Install .NET Core SDK
# 不从 https://dotnetcli.azureedge.net 下载，从本地复制
RUN dotnet_sdk_version=3.1.102 \
#    && curl -SL --output dotnet.tar.gz https://dotnetcli.azureedge.net/dotnet/Sdk/$dotnet_sdk_version/dotnet-sdk-$dotnet_sdk_version-linux-x64.tar.gz \&& dotnet_sha512='9cacdc9700468a915e6fa51a3e5539b3519dd35b13e7f9d6c4dd0077e298baac0e50ad1880181df6781ef1dc64a232e9f78ad8e4494022987d12812c4ca15f29' \&& echo "$dotnet_sha512 dotnet.tar.gz" | sha512sum -c - \&& mkdir -p /usr/share/dotnet \&& tar -ozxf dotnet.tar.gz -C /usr/share/dotnet \&& rm dotnet.tar.gz \&& ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \# Trigger first run experience by running arbitrary cmd&& dotnet help# 不从 https://pwshtool.blob.core.windows.net 下载，从本地复制
# Install PowerShell global tool
RUN powershell_version=7.0.0-rc.2 \
#    && curl -SL --output PowerShell.Linux.x64.$powershell_version.nupkg https://pwshtool.blob.core.windows.net/tool/$powershell_version/PowerShell.Linux.x64.$powershell_version.nupkg \
#   && powershell_sha512='59abcc11bd43fc8c1938a1854447c762092f03b5e2c6c354a82559eed6852e3920c5543c085fbe6fbe98871f96cd7409bb76b1537d3d8dee4e7432d578ec7603' \
#   && echo "$powershell_sha512  PowerShell.Linux.x64.$powershell_version.nupkg" | sha512sum -c - \&& mkdir -p /usr/share/powershell \&& dotnet tool install --add-source / --tool-path /usr/share/powershell --version $powershell_version PowerShell.Linux.x64 \&& dotnet nuget locals all --clear \&& rm /PowerShell.Linux.x64.$powershell_version.nupkg \&& ln -s /usr/share/powershell/pwsh /usr/bin/pwsh \&& chmod 755 /usr/share/powershell/pwsh \# To reduce image size, remove the copy nupkg that nuget keeps.

运行 docker build -t dotnet-sdk:3.0.102 . 就可以创建了

全部代码

FROM jenkins/slaveCOPY dotnet-sdk-3.1.102-linux-x64.tar.gz dotnet.tar.gz
COPY PowerShell.Linux.x64.7.0.0-rc.2.nupkg /# 使用国内源
RUN echo "" >> /etc/apt/sources.list \&& echo "deb http://ftp.cn.debian.org/debian/ buster main contrib non-free" >> /etc/apt/sources.list \&& echo "deb-src http://ftp.cn.debian.org/debian/ buster main contrib non-free" >> /etc/apt/sources.list \&& echo "deb http://ftp.cn.debian.org/debian-security/ buster/updates main contrib non-free" >> /etc/apt/sources.list \&& echo "deb-src http://ftp.cn.debian.org/debian-security/ buster/updates main contrib non-free" >> /etc/apt/sources.list \&& echo "deb http://ftp.cn.debian.org/debian/ buster-updates main contrib non-free" >> /etc/apt/sources.list \&& echo "deb-src http://ftp.cn.debian.org/debian/ buster-updates main contrib non-free" >> /etc/apt/sources.list \&& echo "deb http://ftp.cn.debian.org/debian/ buster-backports main contrib non-free" >> /etc/apt/sources.list \&& echo "deb-src http://ftp.cn.debian.org/debian/ buster-backports main contrib non-free" >> /etc/apt/sources.list# https://github.com/docker-library/buildpack-deps/blob/b0fc01aa5e3aed6820d8fed6f3301e0542fbeb36/buster/curl/Dockerfile
# FROM debian:buster
RUN apt-get update && apt-get install -y --no-install-recommends \ca-certificates \curl \netbase \wget \&& rm -rf /var/lib/apt/lists/*RUN set -ex; \if ! command -v gpg > /dev/null; then \apt-get update; \apt-get install -y --no-install-recommends \gnupg \dirmngr \; \rm -rf /var/lib/apt/lists/*; \fi# FROM buildpack-deps:buster-curl
# https://github.com/docker-library/buildpack-deps/blob/99a1c33fda559272e9322b02a5d778bbd04154e7/buster/scm/Dockerfile
# procps is very common in build systems, and is a reasonably small package
RUN apt-get update && apt-get install -y --no-install-recommends \git \mercurial \openssh-client \subversion \\procps \&& rm -rf /var/lib/apt/lists/*# https://raw.githubusercontent.com/dotnet/dotnet-docker/74c92451ecbd2876280ad51736a6eea4e98a1fb2/3.1/sdk/buster/amd64/Dockerfile
# FROM buildpack-deps:buster-scm
ENV \# Enable detection of running in a containerDOTNET_RUNNING_IN_CONTAINER=true \# Enable correct mode for dotnet watch (only mode supported in a container)DOTNET_USE_POLLING_FILE_WATCHER=true \# Skip extraction of XML docs - generally not useful within an image/container - helps performanceNUGET_XMLDOC_MODE=skip \# PowerShell telemetry for docker image usagePOWERSHELL_DISTRIBUTION_CHANNEL=PSDocker-DotnetCoreSDK-Debian-10# Install .NET CLI dependencies
RUN apt-get update \&& apt-get install -y --no-install-recommends \libc6 \libgcc1 \libgssapi-krb5-2 \libicu63 \libssl1.1 \libstdc++6 \zlib1g \&& rm -rf /var/lib/apt/lists/*# Install .NET Core SDK
# 不从 https://dotnetcli.azureedge.net 下载，从本地复制
RUN dotnet_sdk_version=3.1.102 \
#    && curl -SL --output dotnet.tar.gz https://dotnetcli.azureedge.net/dotnet/Sdk/$dotnet_sdk_version/dotnet-sdk-$dotnet_sdk_version-linux-x64.tar.gz \&& dotnet_sha512='9cacdc9700468a915e6fa51a3e5539b3519dd35b13e7f9d6c4dd0077e298baac0e50ad1880181df6781ef1dc64a232e9f78ad8e4494022987d12812c4ca15f29' \&& echo "$dotnet_sha512 dotnet.tar.gz" | sha512sum -c - \&& mkdir -p /usr/share/dotnet \&& tar -ozxf dotnet.tar.gz -C /usr/share/dotnet \&& rm dotnet.tar.gz \&& ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \# Trigger first run experience by running arbitrary cmd&& dotnet help# 不从 https://pwshtool.blob.core.windows.net 下载，从本地复制
# Install PowerShell global tool
RUN powershell_version=7.0.0-rc.2 \
#    && curl -SL --output PowerShell.Linux.x64.$powershell_version.nupkg https://pwshtool.blob.core.windows.net/tool/$powershell_version/PowerShell.Linux.x64.$powershell_version.nupkg \
#   && powershell_sha512='59abcc11bd43fc8c1938a1854447c762092f03b5e2c6c354a82559eed6852e3920c5543c085fbe6fbe98871f96cd7409bb76b1537d3d8dee4e7432d578ec7603' \
#   && echo "$powershell_sha512  PowerShell.Linux.x64.$powershell_version.nupkg" | sha512sum -c - \&& mkdir -p /usr/share/powershell \&& dotnet tool install --add-source / --tool-path /usr/share/powershell --version $powershell_version PowerShell.Linux.x64 \&& dotnet nuget locals all --clear \&& rm /PowerShell.Linux.x64.$powershell_version.nupkg \&& ln -s /usr/share/powershell/pwsh /usr/bin/pwsh \&& chmod 755 /usr/share/powershell/pwsh \# To reduce image size, remove the copy nupkg that nuget keeps.

我将本文用到两个资源 CSDN 如果没法下载请发我邮件

dotnet-sdk-3.1.102-linux-x64.tar.gz

PowerShell.Linux.x64.7.0.0-rc.2.nupkg

我搭建了自己的博客 https://blog.lindexi.com/ 欢迎大家访问，里面有很多新的博客。只有在我看到博客写成熟之后才会放在csdn或博客园，但是一旦发布了就不再更新

如果在博客看到有任何不懂的，欢迎交流，我搭建了 dotnet 职业技术学院 欢迎大家加入

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