018基础镜像重构之Go编译镜像

构建工具选型(来自章节d008)

• Go (opens new window)
  • 1.25.0 (opens new window)

kenaito-golang:1.25.0

镜像大小：385.66MB 构建耗时：5.6s（不包括下载环境包的时间）

# 下载环境
if [ ! -f "go1.25.0.linux-amd64.tar.gz" ];then
  curl -O https://dl.google.com/go/go1.25.0.linux-amd64.tar.gz
fi
if [ $? -ne 0 ]; then
  echo "下载 go1.25.0.linux-amd64.tar.gz 文件失败"
  exit 1
fi

# 释放文件，优化大小
rm -rf build
mkdir build
tar -xvf go1.25.0.linux-amd64.tar.gz
if [ $? -ne 0 ]; then
  echo "初始化失败"
  exit 1
fi
rm -rf go/test
rm -rf go/src
rm -rf go/doc
mv go build/golang
cd build && pwd

# 压缩成品
tar -czvf golang.tgz golang
rm -rf golang

# Dockerfile
cat > Dockerfile << 'EOF'
FROM alibaba-cloud-linux-3-registry.cn-hangzhou.cr.aliyuncs.com/alinux3/alinux3:latest
LABEL MAINTAINER="tianjun@odboy.cn"
ENV TimeZone="Asia/Shanghai"
ENV GOPROXY="https://goproxy.cn,direct"
ENV GOTOOLCHAIN=local
ENV GOROOT="/home/admin/golang"
ENV PATH="$PATH:${GOROOT}/bin"
WORKDIR /home/admin
ADD golang.tgz .
RUN ln -snf /usr/share/zoneinfo/$TimeZone /etc/localtime && echo $TimeZone > /etc/timezone; \
sed -i 's/mirrors.cloud.aliyuncs.com/mirrors.aliyun.com/' /etc/yum.repos.d/*.repo; \
chmod +x /home/admin/golang/bin/*;
CMD ["sleep","365d"]
EOF

# 构建镜像(docker可换成buildah)
docker build --no-cache -f Dockerfile -t kenaito-golang:1.25.0 .
if [ $? -ne 0 ]; then
  echo "构建镜像失败"
  exit 1
fi

# 运行测试
docker run kenaito-golang:1.25.0