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目錄

• 一、無優化構建鏡像
• 二、不需要輸出的指令丟入/dev/null
• 三、減少RUN構建
• 四、多階段構建
• 五、使用更為輕量級的linux發行版本 
• 總結

一、無優化構建鏡像

mkdir /mnt/nginx
?
vim Dockerfile
FROM centos:7
RUN yum install -y gcc pcre pcre-devel devel zlib-devel make
ADD nginx-1.22.0.tar.gz /mnt/nginx
WORKDIR /mnt/nginx/nginx-1.22.0
#關閉debug日志
RUN sed -i 's/CFLAGS="$CFLAGS -g"/#CFLAGS="$CFLAGS -g"/g' auto/cc/gcc?
RUN ./configure --prefix=/usr/local/nginx?
RUN make
RUN make install
EXPOSE 80
VOLUME ["/usr/local/nginx/html"]
CMD ["/usr/local/nginx/sbin/nginx","-g","daemon off;"]??

二、不需要輸出的指令丟入/dev/null

FROM centos:7
RUN yum install -y gcc pcre pcre-devel devel zlib-devel make &> /dev/null && yum clean all
ADD nginx-1.22.0.tar.gz /mnt/nginx
WORKDIR /mnt/nginx/nginx-1.22.0
RUN sed -i 's/CFLAGS="$CFLAGS -g"/#CFLAGS="$CFLAGS -g"/g' auto/cc/gcc
RUN ./configure --prefix=/usr/local/nginx &> /dev/null
RUN make &> /dev/null
RUN make install &> /dev/null
RUN rm -rf /mnt/nginx/nginx-1.22.0
EXPOSE 80
VOLUME ["/usr/local/nginx/html"]
CMD ["/usr/local/nginx/sbin/nginx""-g","daemon off;"]

三、減少RUN構建

FROM centos:7
ADD nginx-1.22.0.tar.gz /mnt/nginx
WORKDIR /mnt/nginx/nginx-1.22.0
RUN yum install -y gcc pcre pcre-devel devel zlib-devel make &> /dev/null && \
?yum clean all && \
?sed -i 's/CFLAGS="$CFLAGS -g"/#CFLAGS="$CFLAGS -g"/g' auto/cc/gcc && \
?./configure --prefix=/usr/local/nginx &> /dev/null && \
?make &> /dev/null && make install &> /dev/null &&\
?rm -rf /mnt/nginx/nginx-1.22.0
EXPOSE 80
VOLUME ["/usr/local/nginx/html"]
CMD ["/usr/local/nginx/sbin/nginx","-g","daemon off;"]

docker build -t nginx:v3 . 構建鏡像

docker images查看鏡像

四、多階段構建

FROM centos:7 as build?
ADD nginx-1.22.0.tar.gz /mnt/nginx?
WORKDIR /mnt/nginx/nginx-1.22.0
RUN yum install -y gcc pcre pcre-devel devel zlib-devel make &> /dev/null && \
yum clean all &&\
sed -i 's/CFLAGS="$CFLAGS -g"/#CFLAGS="$CFLAGS -g"/g' auto/cc/gcc && \
./configure --prefix=/usr/local/nginx &> /dev/null && \
make &>/dev/null && \
make install &>/dev/null && \
rm -rf /mnt/nginx/nginx-1.22.0

FROM centos:7
EXPOSE 80
VOLUME ["/usr/local/nginx/html"]
COPY --from=build /usr/local/nginx /usr/local/nginx
CMD ["/usr/local/nginx/sbin/nginx","-g","daemon off;"]

docker build -t nginx:v4?. 構建鏡像
docker images查看鏡像

五、使用更為輕量級的linux發行版本 

debian
alpine
apt add
Sandbox
Busybox

#下載debian壓縮包
wget http://download.openvz.org/template/precreated/debian-7.0-x86-minimal.tar.gz
docker import debian-7.0-x86-minimal.tar.gz -- debian:v1 生成鏡像
docker images 查看

總結