How do I fix ln -s not working in Docker? - docker

Question

Step 3/10 : RUN mkdir -p /etc/nginx/{sites-available,sites-enabled}
Step 4/10 : COPY nginx.conf /etc/nginx/
Step 5/10 : COPY sites-available/*.conf /etc/nginx/sites-available/
Step 6/10 : RUN ln -s /etc/nginx/sites-available/* /etc/nginx/sites-enabled/
---> Running in a2f39a3fd6b3
ln: /etc/nginx/sites-enabled/: No such file or directory
ln: /etc/nginx/sites-enabled/: No such file or directory
ln: /etc/nginx/sites-enabled/: No such file or directory
ln: /etc/nginx/sites-enabled/: No such file or directory
ln: /etc/nginx/sites-enabled/: No such file or directory
ln: /etc/nginx/sites-enabled/: No such file or directory
ln: /etc/nginx/sites-enabled/: No such file or directory
ln: /etc/nginx/sites-enabled/: No such file or directory
The command '/bin/sh -c ln -s /etc/nginx/sites-available/* /etc/nginx/sites-enabled/*' returned a non-zero code: 1
Any clue why this isn't working? ^^
I tried all these commands outside of a docker container and it seemed to work

Answer 1

This could be solved by copying the files directly to the sites-enabled directory with the following statement:
COPY sites-available/*.conf /etc/nginx/sites-enabled/

Answer 2

Your step 3 includes a bashism:
mkdir -p /etc/nginx/{sites-available,sites-enabled}
With the default /bin/sh, this will create a single directory rather than the two directories you wanted:
$ docker run -it --rm nginx /bin/sh
# ls -al /etc/nginx
total 48
drwxr-xr-x 3 root root 4096 Dec 28 15:20 .
drwxr-xr-x 1 root root 4096 Jan 26 19:46 ..
drwxr-xr-x 2 root root 4096 Dec 28 15:20 conf.d
-rw-r--r-- 1 root root 1007 Nov 19 12:50 fastcgi_params
-rw-r--r-- 1 root root 2837 Nov 19 12:50 koi-utf
-rw-r--r-- 1 root root 2223 Nov 19 12:50 koi-win
-rw-r--r-- 1 root root 5231 Nov 19 12:50 mime.types
lrwxrwxrwx 1 root root 22 Nov 19 12:50 modules -> /usr/lib/nginx/modules
-rw-r--r-- 1 root root 643 Nov 19 12:50 nginx.conf
-rw-r--r-- 1 root root 636 Nov 19 12:50 scgi_params
-rw-r--r-- 1 root root 664 Nov 19 12:50 uwsgi_params
-rw-r--r-- 1 root root 3610 Nov 19 12:50 win-utf
# mkdir -p /etc/nginx/{sites-available,sites-enabled}
# ls -al /etc/nginx
total 56
drwxr-xr-x 1 root root 4096 Jan 26 19:47 .
drwxr-xr-x 1 root root 4096 Jan 26 19:46 ..
drwxr-xr-x 2 root root 4096 Dec 28 15:20 conf.d
-rw-r--r-- 1 root root 1007 Nov 19 12:50 fastcgi_params
-rw-r--r-- 1 root root 2837 Nov 19 12:50 koi-utf
-rw-r--r-- 1 root root 2223 Nov 19 12:50 koi-win
-rw-r--r-- 1 root root 5231 Nov 19 12:50 mime.types
lrwxrwxrwx 1 root root 22 Nov 19 12:50 modules -> /usr/lib/nginx/modules
-rw-r--r-- 1 root root 643 Nov 19 12:50 nginx.conf
-rw-r--r-- 1 root root 636 Nov 19 12:50 scgi_params
-rw-r--r-- 1 root root 664 Nov 19 12:50 uwsgi_params
-rw-r--r-- 1 root root 3610 Nov 19 12:50 win-utf
drwxr-xr-x 2 root root 4096 Jan 26 19:47 {sites-available,sites-enabled}
For /bin/sh, you need to list them individually:
# mkdir -p /etc/nginx/sites-available /etc/nginx/sites-enabled
# ls -al /etc/nginx
total 64
drwxr-xr-x 1 root root 4096 Jan 26 19:49 .
drwxr-xr-x 1 root root 4096 Jan 26 19:46 ..
drwxr-xr-x 2 root root 4096 Dec 28 15:20 conf.d
-rw-r--r-- 1 root root 1007 Nov 19 12:50 fastcgi_params
-rw-r--r-- 1 root root 2837 Nov 19 12:50 koi-utf
-rw-r--r-- 1 root root 2223 Nov 19 12:50 koi-win
-rw-r--r-- 1 root root 5231 Nov 19 12:50 mime.types
lrwxrwxrwx 1 root root 22 Nov 19 12:50 modules -> /usr/lib/nginx/modules
-rw-r--r-- 1 root root 643 Nov 19 12:50 nginx.conf
-rw-r--r-- 1 root root 636 Nov 19 12:50 scgi_params
drwxr-xr-x 2 root root 4096 Jan 26 19:49 sites-available
drwxr-xr-x 2 root root 4096 Jan 26 19:49 sites-enabled
-rw-r--r-- 1 root root 664 Nov 19 12:50 uwsgi_params
-rw-r--r-- 1 root root 3610 Nov 19 12:50 win-utf
drwxr-xr-x 2 root root 4096 Jan 26 19:47 {sites-available,sites-enabled}