Docker : Dockerfile can't execute COPY - docker

Question

I ve to build a docker images .
Inside my repositiory , i ve those files :
Dockerfile
docker-prompt
My Dockerfile is :
FROM fortio/fortio:1.3.1 as fortiobuild
FROM docker:stable-dind
RUN apk add --no-cache tcpdump apache2-utils lynx git tmux py2-pip apache2-utils vim build-base gettext-dev curl bash-completion bash util-linux jq openssh openssl tree python python-dev py-pip libffi-dev openssl-dev libgcc nfs-utils
ENV COMPOSE_VERSION=1.24.1
RUN pip install docker-compose==${COMPOSE_VERSION}
RUN mkdir /etc/bash_completion.d \
&& curl https://raw.githubusercontent.com/docker/cli/master/contrib/completion/bash/docker -o /etc/bash_completion.d/docker \
&& sed -i "s/ash/bash/" /etc/passwd
RUN rm /sbin/modprobe && echo '#!/bin/true' >/sbin/modprobe && chmod +x /sbin/modprobe
COPY ["docker-prompt", "sudo", "/usr/local/bin/"]
I ve run this cmd :
docker build -t "myImage"
but if fails throwing this :
Step 8/8: COPY ["docker-prompt", "sudo", "/usr/local/bin/"] COPY
failed: stat /var/lib/docker/tmp/docker-builder273771066/sudo: no such
file or directory
Since it's not clear what is the problem ,
Suggestions ?

Answer 1

COPY command work with source and destination only, if you want to own file to sudo then you need to use --chown. otherwise the copy command will consider the Sudo as the source path.
COPY
COPY has two forms:
COPY [--chown=<user>:<group>] <src>... <dest>
COPY [--chown=<user>:<group>] ["<src>",... "<dest>"] (this form is required for paths containing whitespace)
Note:
The --chown feature is only supported on Dockerfiles used to build
Linux containers, and will not work on Windows containers. Since user
and group ownership concepts do not translate between Linux and
Windows, the use of /etc/passwd and /etc/group for translating user
and group names to IDs restricts this feature to only be viable for
Linux OS-based containers.
I assume that you are looking for a way like
COPY --chown=root:root docker-prompt /usr/local/bin/