Error during docker build PHP 8.1 on Ubuntu 20.04 - docker

Question

I'm working on a Ubuntu Linux 20.04
Docker version is: Docker version 20.10.18, build b40c2f6
I have the following Dockerfile file
FROM ubuntu:20.04
LABEL maintainer="Taylor Otwell"
ARG WWWGROUP
ARG NODE_VERSION=16
WORKDIR /var/www/html
ENV DEBIAN_FRONTEND noninteractive
ENV TZ=UTC
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
RUN apt-get update \
&& apt-get install -y apt-transport-https
RUN apt-get install -y software-properties-common gnupg gosu curl ca-certificates zip unzip git supervisor sqlite3 libcap2-bin libpng-dev python2 \
&& mkdir -p ~/.gnupg \
&& chmod 600 ~/.gnupg \
&& echo "disable-ipv6" >> ~/.gnupg/dirmngr.conf
RUN LC_ALL=C.UTF-8 add-apt-repository -y ppa:ondrej/php \
&& apt-get update \
&& apt-get install -y php8.1-cli php8.1-dev \
php8.1-pgsql php8.1-sqlite3 php8.1-gd \
php8.1-curl \
php8.1-imap php8.1-mysql php8.1-mbstring \
php8.1-xml php8.1-zip php8.1-bcmath php8.1-soap \
php8.1-intl php8.1-readline \
php8.1-ldap \
php8.1-msgpack php8.1-igbinary php8.1-redis php8.1-swoole \
php8.1-memcached php8.1-pcov php8.1-xdebug \
php8.1-amqp php8.1-imagick \
&& sed -i 's/<policy domain="coder" rights="none" pattern="PDF" \/>/<policy domain="coder" rights="read|write" pattern="PDF" \/>/g' /etc/ImageMagick-6/policy.xml \
&& php -r "readfile('https://getcomposer.org/installer');" | php -- --install-dir=/usr/bin/ --filename=composer \
&& curl -sL https://deb.nodesource.com/setup_$NODE_VERSION.x | bash - \
&& apt-get install -y nodejs \
&& npm install -g npm \
&& curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
&& echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list \
&& sh -c 'echo "deb https://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list' \
&& curl -sS https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
&& apt-get update \
&& apt-get install -y yarn \
&& apt-get install -y mysql-client \
&& apt-get install -y postgresql-client-14 \
&& apt-get -y autoremove \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
RUN setcap "cap_net_bind_service=+ep" /usr/bin/php8.1
RUN groupadd --force -g $WWWGROUP dstr
RUN useradd -ms /bin/bash --no-user-group -g $WWWGROUP -u 1337 dstr
COPY start-container /usr/local/bin/start-container
COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
COPY php.ini /etc/php/8.1/cli/conf.d/99-dstr.ini
RUN chmod +x /usr/local/bin/start-container
EXPOSE 8000
ENTRYPOINT ["start-container"]
Then I run command:
docker build -t np1tshkodenko/api:8.1 .
I got the following output:
shkodenko.t#WSH63676:~/2023-02-07_lara/zoning-backend/docker/api/8.1$ docker build -t np1tshkodenko/api:8.1 .
[+] Building 149.0s (13/18)
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 2.62kB 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/ubuntu:20.04 2.8s
=> [auth] library/ubuntu:pull token for registry-1.docker.io 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 1.05kB 0.0s
=> [ 1/13] FROM docker.io/library/ubuntu:20.04#sha256:4a45212e9518f35983a976eead0de5eecc555a2f047134e9dd2cfc589076a00d 2.1s
=> => resolve docker.io/library/ubuntu:20.04#sha256:4a45212e9518f35983a976eead0de5eecc555a2f047134e9dd2cfc589076a00d 0.0s
=> => sha256:4a45212e9518f35983a976eead0de5eecc555a2f047134e9dd2cfc589076a00d 1.13kB / 1.13kB 0.0s
=> => sha256:bffb6799d706144f263f4b91e1226745ffb5643ea0ea89c2f709208e8d70c999 424B / 424B 0.0s
=> => sha256:e40cf56b4be35b04f620bc9cfbef80038fd7370d4ed36d90676223174ecbf0b0 2.30kB / 2.30kB 0.0s
=> => sha256:b549f31133a955f68f9fa0d93f18436c4a180e12184b999a8ecf14f7eaa83309 27.50MB / 27.50MB 1.1s
=> => extracting sha256:b549f31133a955f68f9fa0d93f18436c4a180e12184b999a8ecf14f7eaa83309 0.9s
=> [ 2/13] WORKDIR /var/www/html 0.1s
=> [ 3/13] RUN ln -snf /usr/share/zoneinfo/UTC /etc/localtime && echo UTC > /etc/timezone 0.2s
=> [ 4/13] RUN apt-get update && apt-get install -y apt-transport-https 6.6s
=> [ 5/13] RUN apt-get install -y software-properties-common gnupg gosu curl ca-certificates zip unzip git supervisor sqlite3 libcap2-bin libpng-dev python2 && mkdir -p ~/. 58.5s
=> [ 6/13] RUN LC_ALL=C.UTF-8 add-apt-repository -y ppa:ondrej/php && apt-get update && apt-get install -y php8.1-cli php8.1-dev php8.1-pgsql php8.1-sqlite3 php8 78.1s
=> [ 7/13] RUN setcap "cap_net_bind_service=+ep" /usr/bin/php8.1 0.2s
=> ERROR [ 8/13] RUN groupadd --force -g $WWWGROUP dstr 0.2s
------
> [ 8/13] RUN groupadd --force -g $WWWGROUP dstr:
#12 0.211 groupadd: invalid group ID 'dstr'
------
executor failed running [/bin/sh -c groupadd --force -g $WWWGROUP dstr]: exit code: 3
shkodenko.t#WSH63676:~/2023-02-07_lara/zoning-backend/docker/api/8.1$
How can I fix this error to complete a build?
I've tried to execute docker build -t np1tshkodenko/api:8.1 . and I'm expecting to get a working container build.

Answer 1

You need to pass a value for the WWWGROUP variable when you build the image.
I don't know what a sensible value would be, but let's say that you want the value to be 'mygroup'. Then you'd do
docker build -t np1tshkodenko/api:8.1 --build-arg WWWGROUP=mygroup .