Shopware 6 - docker:start fails with non-zero code: 2 - docker

Question

First I pull this repo: https://github.com/shopware/development
Then I want to start a demo shop with command ./psh.phar docker:start in the repo directory.
Then this error appears, and the containers are not biult:
Building app_mysql ... done
Successfully tagged shopware-test_app_mysql:latest
---> Running in e0e02269e83d
Listen 8000
Warning: apt-key output should not be parsed (stdout is not a terminal)
gpg: no valid OpenPGP data found.
ERROR: for app_server (<Service: app_server>, 'The command \'/bin/sh -c sed -ri -e \'s!VirtualHost \\*:80!VirtualHost \\*:8000!g\' /opt/docker/etc/httpd/vhost.conf && echo "Listen 8000" | tee -a /etc/apache2/ports.conf && curl -sL https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - && sh -c \'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list\' && curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add - && sh -c \'echo "deb [arch=amd64] https://download.docker.com/linux/debian stretch stable" >> /etc/apt/sources.list.d/docker.list\' && mkdir -p /usr/share/man/man1 && curl -sL https://deb.nodesource.com/setup_12.x | bash && mkdir -p ${NPM_CONFIG_CACHE} && apt-install default-mysql-client nodejs google-chrome-stable libicu-dev graphviz vim gnupg2 docker-ce=5:18.09.7~3-0~debian-stretch libgtk2.0-0 libgtk-3-0 libgbm-dev libnotify-dev libgconf-2-4 libnss3 libxss1 libasound2 libxtst6 xauth xvfb && npm install -g npm#^6.14.11 && npm i forever -g && chown -R ${USER_ID}:${GROUP_ID} ${NPM_CONFIG_CACHE} && ln -s /app/psh.phar /bin/psh && pecl install pcov && docker-php-ext-enable pcov\' returned a non-zero code: 2')
Service 'app_server' failed to build: The command '/bin/sh -c sed -ri -e 's!VirtualHost \*:80!VirtualHost \*:8000!g' /opt/docker/etc/httpd/vhost.conf && echo "Listen 8000" | tee -a /etc/apache2/ports.conf && curl -sL https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - && sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' && curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add - && sh -c 'echo "deb [arch=amd64] https://download.docker.com/linux/debian stretch stable" >> /etc/apt/sources.list.d/docker.list' && mkdir -p /usr/share/man/man1 && curl -sL https://deb.nodesource.com/setup_12.x | bash && mkdir -p ${NPM_CONFIG_CACHE} && apt-install default-mysql-client nodejs google-chrome-stable libicu-dev graphviz vim gnupg2 docker-ce=5:18.09.7~3-0~debian-stretch libgtk2.0-0 libgtk-3-0 libgbm-dev libnotify-dev libgconf-2-4 libnss3 libxss1 libasound2 libxtst6 xauth xvfb && npm install -g npm#^6.14.11 && npm i forever -g && chown -R ${USER_ID}:${GROUP_ID} ${NPM_CONFIG_CACHE} && ln -s /app/psh.phar /bin/psh && pecl install pcov && docker-php-ext-enable pcov' returned a non-zero code: 2
Execution aborted, a subcommand failed!
The same happens when I run docker-compose up.
What is the problem there?
I run Xubuntu 18.04. This used to work fine a few weeks ago. What could have happened?
I also opened an issue on Github: https://github.com/shopware/development/issues/161

Answer 1

If you take a look into the error, here:
curl -sL https://dl-ssl.google.com/linux/linux_signing_key.pub |
apt-key add -
download the key and try to use it, but gives you this error:
Warning: apt-key output should not be parsed (stdout is not a terminal)
You should check if in your environment docker is able to download that key and use it

Answer 2

I kind of solved this by updating Xubuntu from 18.04 to 20.04. The apt-key output error remains, but otherwise the containers get built.

Answer 3

I had this issue on ubuntu 22 when docker-compose was not installed, so just run:
sudo apt install docker-compose