Docker COPY fails with no such file or directory, but i am root and can access the file

manu muraleedharan

6/6/23, 10:15 AM

Simple dockerfile like this:

FROM tomcat:latest
RUN cp -R /usr/local/tomcat/webapps.dist/* /usr/local/tomcat/webapps
COPY /home/dockeradmin/*.war /usr/local/tomcat/webapps

Third statement fails saying no such file or directory. I am running this as root, inside /root. /home/dockeradmin and *.war file is owned by dockeradmin user, but as root i have access to it.

I can run ls /home/dockeradmin/*.war without any issue.

RUN cp /home/dockeradmin/*.war /usr/local/tomcat/webapps

also fails with cp: cannot stat '/home/dockeradmin/*.war': No such file or directory I can also run stat /home/dockeradmin/*.war without any issue. It has 664 permission, changed to 777, no go still.

If i copy the Dockerfile to the /home/dockeradmin and change the instruction:

COPY ./*.war /usr/local/tomcat/webapps

It works fine.

Not sure why the first option has an issue.

712

0 + 0

linux

docker

Score:4

Server

AlexD

6/6/23, 10:34 AM

Docker COPY <src> is interpreted as relative path to the docker build context. See the documentation.

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manu muraleedharan

6/22/23, 4:57 PM

Yes. this was the issue. All paths in COPY are resolved as relative to where you are running docker build from . So /home/dockeradmin/*.war actually became /root/home/dockeradmin/*.war when running it from root folder. And that path did not exist.

Score:1

Server

Peyman

6/7/23, 11:09 AM

the destination must ends with /

ie: /usr/local/tomcat/webapps/ is correct, not /usr/local/tomcat/webapps

0 + 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Docker COPY fails with no such file or directory, but i am root and can access the file

TH: Docker COPY ล้มเหลวโดยไม่มีไฟล์หรือไดเร็กทอรีดังกล่าว แต่ฉันรูทและสามารถเข้าถึงไฟล์ได้

RO: Docker COPY nu reușește fără un astfel de fișier sau director, dar sunt root și pot accesa fișierul

RU: Docker COPY не работает без такого файла или каталога, но я являюсь пользователем root и могу получить доступ к файлу

VI: Docker COPY không thành công khi không có tệp hoặc thư mục như vậy, nhưng tôi đã root và có thể truy cập tệp

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