Ubuntu release peculiarities. about docker-baseimage-gui HOT 4 CLOSED

You are not using the correct image tag. You probably want to use ubuntu-20.04-v4.

So your Dockerfile should have:

FROM jlesage/baseimage-gui:ubuntu-20.04-v4

from docker-baseimage-gui.

Yep. That did it!

I did find out one other peculiarity which might need fixing.

Dockerfile:

COPY startapp.sh /startapp.sh
RUN chmod 755 /startapp.sh

Yes. I have to add "chmod 755" otherwise it does not work, EVEN THOUGH /etc/cont-init.d/00-app-script.sh claims to set the permissions to 755. I've tested it setting my host file permissions to 644.

Here's the content of /etc/cont-init.d/00-app-script.sh (which doesn't seem to work as intended):

#!/usr/bin/with-contenv sh

#
# Make sure the startapp.sh has execution permission.
#

set -e # Exit immediately if a command exits with a non-zero status.
set -u # Treat unset variables as an error.

if [ -e /startapp.sh ] ; then
    chmod 755 /startapp.sh
    sync
fi

# vim:ft=sh:ts=4:sw=4:et:sts=4

Anyway, this is now a moot point because you can just put "startapp.sh" permanently in your baseimage-gui and set the permissions as well before you create your image. Users will never have to modify/copy it again.

from docker-baseimage-gui.

Humm /etc/cont-init.d/00-app-script.sh is not part of the baseimage...

In your source tree, startapp.sh should already have execute permission.

from docker-baseimage-gui.

Humm /etc/cont-init.d/00-app-script.sh is not part of the baseimage...

Strange. I didn't add it.

Anyway, I think the best thing to do is to add this to the Dockerfile and it will prevent any potential problems.

RUN chmod 755 /startapp.sh

from docker-baseimage-gui.