分阶段打包 #Dockfile

Dockerfile

FROM golang:1.6 as builder

RUN mkdir -p /home/filex
RUN mkdir -p /disk/ssd1
WORKDIR /home/filex
ARG project
COPY ./filex/$project .

FROM builder as job
# 注意，如果 stage 中想要使用 ARG 需要重新在此重新定义
# refer: An ARG instruction goes out of scope at the end of the build stage where it was defined. 
# To use an arg in multiple stages, each stage must include the ARG instruction.
# https://stackoverflow.com/questions/53681522/share-variable-in-multi-stage-dockerfile-arg-before-from-not-substituted
CMD ["sh", "-c", "./share/job"]

FROM builder as rawlog
CMD ["sh", "-c", "./share/rawlog"]

FROM builder as upload
CMD ["sh", "-c", "./share/upload"]

# build image command
# --build-arg project=$(job), pass variable $(job) to dockerfile ARG project
# --target upload, assign stage upload
# docker build --build-arg project=$(job) --target upload -t filex-upload .