How to copy folders to docker image from Dockerfile

Question

I tried the following command in my Dockerfile  COPY     and got mighty surprised at the result  Seems the naive docker code traverses the directories from the glob and then dumps the each file in the target directory while respectfully ignoring my directory structure    At least that is how I understand this ticket and it certainly corresponds to the result I got    I guess the only reason this behavior can still exist must be that there is some other way this should be done  But it is not so easy for a bear of very little brain to understand how  does anyone know

User · Answer

Suppose you want to copy the contents from a folder where you have docker file into your container. Use ADD:

RUN mkdir /temp
ADD folder /temp/Newfolder

it will add to your container with temp/newfolder

folder is the folder/directory where you have the dockerfile, more concretely, where you put your content and want to copy that.

Now can you check your copied/added folder by runining container and see the content using ls

User · Answer

I don t completely understand the case of the original poster but I can proof that it s possible to copy directory structure using COPY in Dockerfile   Suppose you have this folder structure   folder1   file1 html   file2 html folder2   file3 html   file4 html   subfolder     file5 html     file6 html   To copy it to the destination image you can use such a Dockerfile content   FROM nginx  COPY   folder1   usr share nginx html folder1  COPY   folder2   usr share nginx html folder2   RUN ls -laR  usr share nginx html     The output of docker build   as follows     docker build --no-cache   Sending build context to Docker daemon  9 728kB Step 1 4   FROM nginx  --- gt  7042885a156a Step 2 4   COPY   folder1   usr share nginx html folder1   --- gt  6388fd58798b Step 3 4   COPY   folder2   usr share nginx html folder2   --- gt  fb6c6eacf41e Step 4 4   RUN ls -laR  usr share nginx html    --- gt  Running in face3cbc0031 -rw-r--r-- 1 root root  494 Dec 25 09 56  usr share nginx html 50x html -rw-r--r-- 1 root root  612 Dec 25 09 56  usr share nginx html index html   usr share nginx html folder1  total 16 drwxr-xr-x 2 root root 4096 Jan 16 10 43   drwxr-xr-x 1 root root 4096 Jan 16 10 43    -rwxr-xr-x 1 root root    7 Jan 16 10 32 file1 html -rwxr-xr-x 1 root root    7 Jan 16 10 32 file2 html   usr share nginx html folder2  total 20 drwxr-xr-x 3 root root 4096 Jan 16 10 43   drwxr-xr-x 1 root root 4096 Jan 16 10 43    -rwxr-xr-x 1 root root    7 Jan 16 10 32 file3 html -rwxr-xr-x 1 root root    7 Jan 16 10 32 file4 html drwxr-xr-x 2 root root 4096 Jan 16 10 33 subfolder   usr share nginx html folder2 subfolder  total 16 drwxr-xr-x 2 root root 4096 Jan 16 10 33   drwxr-xr-x 3 root root 4096 Jan 16 10 43    -rwxr-xr-x 1 root root    7 Jan 16 10 32 file5 html -rwxr-xr-x 1 root root    7 Jan 16 10 32 file6 html Removing intermediate container face3cbc0031  --- gt  0e0062afab76 Successfully built 0e0062afab76

User · Answer

use ADD instead of COPY   Suppose you want to copy everything in directory src from host to directory dst from container  ADD src dst  Note  directory dst will be automatically created in container

User · Answer

As mentioned in your ticket      You have COPY files    test  which expands to COPY files dir files file1 files file2 files file  test     If you split this up into individual COPY commands  e g  COPY files dir  test   you ll see that  for better or worse  COPY will copy the contents of each arg dir into the destination directory  Not the arg dir itself  but the contents        I m not thrilled with that fact that COPY doesn t preserve the top-level dir but its been that way for a while now    so in the name of preserving a backward compatibility  it is not possible to COPY ADD a directory structure   The only workaround would be a series of RUN mkdir -p  x y z to build the target directory structure  followed by a series of docker ADD  one for each folder to fill    ADD  not COPY  as per comments

User · Answer

Replace the   with a    So instead of   COPY    lt destination gt   use  COPY    lt destination gt

User · Answer

Like  Vonc said  there is no possibility to add a command like as of now  The only workaround is to mention the folder  to create it and add contents to it     add contents to folder ADD src  HOME src   Would create a folder called src in your directory and add contents of your folder src into this

User · Answer

COPY    lt destination gt   Which would be in your case   COPY

User · Answer

FROM openjdk 8-jdk-alpine RUN apk update  amp  amp  apk add wget openssl lsof procps curl RUN apk update RUN mkdir -p  apps agent RUN mkdir -p  apps lib ADD   app agent  apps agent ADD   app lib  apps lib ADD   app    apps app  RUN ls -lrt  apps app  CMD sh  apps app launch sh  by using DockerFile  I m copying agent  and lib directories to  apps agent  apps lib directories and bunch of files to target

User · Answer

Use ADD  docs  The ADD command can accept as a  lt src gt  parameter   A folder within the build folder  the same folder as your Dockerfile   You would then add a line in your Dockerfile like this   ADD folder  path inside your container  or  A single-file archive anywhere in your host filesystem  To create an archive use the command   tar -cvzf newArchive tar gz  path to your folder  You would then add a line to your Dockerfile like this  ADD  path to archive newArchive tar gz   path inside your container  Notes   ADD will automatically extract your archive  presence absence of trailing slashes is important  see the linked docs

User · Answer

the simplest way   sudo docker cp path on your machine adam ubuntu  root path in container   Note putting into the root path if you are copying something that needs to be picked up by the root using

[docker] How to copy folders to docker image from Dockerfile?

it will add to your container with temp/newfolder

folder is the folder/directory where you have the dockerfile, more concretely, where you put your content and want to copy that.

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