• Rocky Linux (9):
  • erst epel-release installieren (fügt neues Repository hinzu)
  • debootstrap
• Debian (ab 12): debootstrap

¹⁾

sudo debootstrap --variant=minbase trixie ./debian http://debian/debian
sudo tar cC debian/ . | docker image import - ingo/debian:trixie

Tag latest hinzufügen:

docker image ls ingo/debian:trixie

→ id rauskopieren (z.B. dc9f1edde160)

docker image tag dc9f1edde160 ingo/debian:latest

docker container run ingo/debian echo hello world

mkdir nginx
cd nginx

Dockerfile

FROM ingo/debian:trixie
LABEL version="0.0.1"
LABEL maintainer="me@example.com"
ENV DEBIAN_FRONTEND=noninteractive
ARG REFRESHED_AT=2026-01-07
RUN set -eux; \
  apt-get -qq update; \
  apt-get install -y --no-install-recommends nginx
RUN echo 'A warm welcome from your Dockerfile' > /var/www/html/index.html
EXPOSE 80
ENTRYPOINT ["/usr/sbin/nginx", "-g", "daemon off;"]

²⁾

ENTRYPOINT / CMD / run-Command

["script.sh"]

script.sh

["script.sh"]

/bin/dash

script.sh /bin/dash

["script.sh"]

["httpd"]

script.sh httpd

["script.sh"]

["httpd"]

/bin/dash

script.sh /bin/dash

["/bin/sh"]

/bin/sh

["/bin/sh"]

/bin/dash

/bin/dash

/bin/bash

docker build -t='ingo/nginx:0.0.1' .
docker image ls ingo/nginx:0.0.1

→ id rauskopieren (z.B. 5879d7773761)

docker image tag 5879d7773761 ingo/nginx:latest
docker container run -d -p 80:80 --name my_nginx ingo/nginx
curl -s http://localhost:80

→ im Browser http://localhost öffnen

Dockerfile

…
RUN ln -sf /dev/stdout /var/log/nginx/access.log \
    && ln -sf /dev/stderr /var/log/nginx/error.log
…

docker build --no-cache --pull -t='ingo/nginx:0.0.2' .

Jetzt noch mal testen und

docker logs

ansehen.