我的 Dockerfile 有第二阶段：
############################################ MULTI STAGE BUILD PART 2 ##############################################
# Start from alpine image
FROM alpine
# Creating work directory
WORKDIR /service
# Copy the certificats and executable into new Docker image
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /service/main /service/
COPY --from=builder /service/.credentials /service/.credentials/
# Expose port
EXPOSE ${GRPC_PORT}
EXPOSE ${REST_PORT}
## Get required ARGs and put them into ENVs variables
ARG ENVIRONMENT
ARG NAMESPACE
ARG GRPC_PORT
ARG REST_PORT
ENV _ENVIRONMENT=${ENVIRONMENT}
ENV _NAMESPACE=${NAMESPACE}
ENV _GRPC_PORT=${GRPC_PORT}
ENV _REST_PORT=${REST_PORT}
### HERE YOU CAN TEST WITH ANY OF THE FOLLOWING ENTRYPOINT
# The One I need
ENTRYPOINT /main "ENVIRONMENT=${_ENVIRONMENT}" "NAMESPACE=${_NAMESPACE}" "GRPC_PORT=${_GRPC_PORT}" "REST_PORT=${_REST_PORT}"
# This one isn't able to resolve ENVs variables, but I use it as an example for my ISSUE
ENTRYPOINT [ "/main" ]
如您所见，WORKDIR 设置为 /service
但是，如果您使用第一个入口点运行映像，您会得到：
/bin/sh: /main: not found
如果你使用第二个入口点运行，你会得到：
docker: Error response from daemon: OCI runtime create failed: container_linux.go:346: starting container process caused "exec: \"/main\": stat /main: no such file or directory": unknown.
注意：另一个有趣的点是COPY --from=builder ...我需要在其中设置 dest/service/否则我的文件会被复制到/目录中
根据文档：
WORKDIR 指令为 Dockerfile 中任何 RUN、CMD、ENTRYPOINT、COPY 和 ADD 指令设置工作目录。
任何想法？它真的与我或 Docker/alpine 有关吗？