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Docker error: failed to solve: archive/tar: unknown file mode ?rwxr-xr-x

I try to containerize the react application, but this error persists.

Here’s the log:

[+] Building 0.0s (0/0)  docker:default

[+] Building 4.2s (9/16)                                                                                                                                                                         docker:default
 => [internal] load build definition from Dockerfile                                                                                                                                                       0.0s

 => => transferring dockerfile: 380B                                                                                                                                                                       0.0s 

 => [internal] load metadata for docker.io/library/nginx:stable-perl                                                                                                                                       4.0s 
 => [internal] load metadata for docker.io/library/node:lts-alpine                                                                                                                                         4.0s 
 => [auth] library/nginx:pull token for registry-1.docker.io                                                                                                                                               0.0s
 => [auth] library/node:pull token for registry-1.docker.io                                                                                                                                                0.0s
 => [internal] load .dockerignore                                                                                                                                                                          0.0s 
 => => transferring context: 52B                                                                                                                                                                           0.0s 
 => CANCELED [build 1/7] FROM docker.io/library/node:lts-alpine@sha256:a7b980c958bfe4d84ee9263badd95a40c8bb50ad5afdb87902c187fefaef0e24                                                                    0.1s 
 => => resolve docker.io/library/node:lts-alpine@sha256:a7b980c958bfe4d84ee9263badd95a40c8bb50ad5afdb87902c187fefaef0e24                                                                                   0.0s 
 => => sha256:a7b980c958bfe4d84ee9263badd95a40c8bb50ad5afdb87902c187fefaef0e24 1.43kB / 1.43kB                                                                                                             0.0s 
 => => sha256:db4b1d98b5a92263f2b9221c4d7930ce6b02f9834926c8b6174bfed2913cea16 1.16kB / 1.16kB                                                                                                             0.0s 
 => => sha256:5414852b0111feebb3686ec58f92f2edb534cef2826b575581cdcadd42a7f527 7.21kB / 7.21kB                                                                                                             0.0s 
 => ERROR [internal] load build context                                                                                                                                                                    0.1s 
 => => transferring context: 1.43MB                                                                                                                                                                        0.0s 

 => CANCELED [stage-1 1/2] FROM docker.io/library/nginx:stable-perl@sha256:3083ef7ca8bc4f7dc24596382092ae5e53d1169a6e706b83c2b448d044919ba3                                                                0.1s 
 => => resolve docker.io/library/nginx:stable-perl@sha256:3083ef7ca8bc4f7dc24596382092ae5e53d1169a6e706b83c2b448d044919ba3                                                                                 0.0s 
 => => sha256:3083ef7ca8bc4f7dc24596382092ae5e53d1169a6e706b83c2b448d044919ba3 10.27kB / 10.27kB                                                                                                           0.0s 
 => => sha256:15585364514a1e9df46ec8d6ddfd1a56ee316724f47cb7b375ce4d4df137c856 2.49kB / 2.49kB                                                                                                             0.0s 
 => => sha256:e790832271e7c18bce18208197ed61dde7dd4821af50789ceb4bc2c5d1b0b205 9.97kB / 9.97kB                                                                                                             0.0s 

------
 > [internal] load build context:
------
ERROR: failed to solve: archive/tar: unknown file mode ?rwxr-xr-x

I looked it up; it seems to have something to do with the file permissions. I tried changing the files in the directory via Windows Explorer, but nothing happens.

I have tried the chmod but still no luck.

Here is the Dockerfile

FROM node:lts-alpine AS build

WORKDIR /optimal/

COPY package*.json ./

RUN npm install

COPY src/ /optimal/src

COPY public/ /optimal/public

RUN chmod -R 755 /optimal/src /optimal/public

RUN npm run build

CMD [ "npm", "start" ]

FROM nginx:stable-perl

WORKDIR /usr/share/nginx/html

COPY –from=build /optimal/build /usr/share/nginx/html

EXPOSE 80

CMD [ "nginx", "-g", "daemon off;" ]

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2

Answers


  1. 0

    this error is related to a file in your build context having an unusual or invalid file mode that Docker doesn’t recognize. This can often happen when the files are copied from a Windows filesystem, which uses different file permission schemes compared to Unix-based systems.

    Check the File Permissions and Attributes:

    Ensure that the files in your context directory (especially src and public) don’t have unusual attributes. You can use ls -l to check the file permissions on a Unix-like system.

    Ensure Correct Line Endings:

    Sometimes, files might have incorrect line endings if edited on Windows. Use tools like dos2unix to convert the files.
    find . -type f -exec dos2unix {} ;

    then try this dockerfile

    FROM node:lts-alpine AS build

WORKDIR /optimal/

# Copy package files and install dependencies
COPY package*.json ./
RUN npm install

# Copy source files
COPY src/ /optimal/src
COPY public/ /optimal/public

# Sanitize file permissions in the build context
RUN find /optimal/src /optimal/public -type d -exec chmod 755 {} ;
RUN find /optimal/src /optimal/public -type f -exec chmod 644 {} ;

RUN npm run build

FROM nginx:stable-perl

WORKDIR /usr/share/nginx/html

# Copy build artifacts
COPY --from=build /optimal/build /usr/share/nginx/html

EXPOSE 80

CMD ["nginx", "-g", "daemon off;"]

    Ensure you have a .dockerignore file to exclude unnecessary files. Example:

    node_modules
    Dockerfile
    .dockerignore

    Rebuild Docker Image:

    Clean up Docker and rebuild the image:

    docker system prune --all --force
    docker build -t my-react-app .

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  2. 0

    initially nothing worked for me too, but it finally worked when I just ran docker compose build using Git Bash. The one you get when you install git from https://git-scm.com/download/win

    Could you also try that and see if it works for you?

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