IT-SDK-Docker

Source

• https://docs.docker.com/docker-hub/access-tokens/
• https://cloud.google.com/container-registry/docs/pulling-cached-images#docker-ui
• https://github.com/Philip-Scott/docker-workspace
• VS-Code & Containers: https://code.visualstudio.com/docs/remote/containers
• CheatSheet: https://www.docker.com/sites/default/files/d8/2019-09/docker-cheat-sheet.pdf
• Source: https://docs.docker.com/v17.09/engine/reference/builder/
• Link: http://docs.projectatomic.io/container-best-practices/#_abstract
• Link: https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
• Website-CMD: (https://docs.docker.com/engine/reference/commandline/)
• Website-TUT: (https://docs.docker.com/engine/tutorials/usingdocker/)
• Portainer: (http://portainer.io/index.html) stammt aus UI-for-Docker (https://github.com/kevana/ui-for-docker)
• Docker & Kubernetes: https://www.middlewareinventory.com/blog/deploy-docker-image-to-kubernetes/
• Docker & Kubernetes: https://www.linode.com/docs/kubernetes/deploy-container-image-to-kubernetes/

Definitions

• Docker Compose is a tool for defining and running multi-container Docker applications

Installation

docker-compose

• Source: https://docs.docker.com/compose/install/

sudo curl -L "https://github.com/docker/compose/releases/download/1.25.3/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

fedora

• Source: https://docs.docker.com/engine/install/fedora/

sudo dnf remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-selinux docker-engine-selinux docker-engine
---
sudo dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo
sudo dnf install docker-ce docker-ce-cli containerd.io
---
sudo systemctl start docker
sudo systemctl enable docker

ubuntu

• Source: https://docs.docker.com/engine/install/ubuntu/

$ sudo apt-get remove docker docker-engine docker.io containerd runc
$ sudo apt-get update
$ sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io
..
$ sudo groupadd docker
$ sudo usermod -aG docker $USER

Dockerfile

Ref

• https://docs.docker.com/engine/reference/builder/
• https://developers.redhat.com/articles/2021/10/12/10-steps-better-dockerfile

Dockerfile-Definition

FROM        Sets the base image for subsequent
MAINTAINER  Sets the author field of the generated images
RUN	    Execute commands in a new layer on top of the current image and commit the results
CMD	    Allowed only once (if many then last one takes effect)
LABEL	    Adds metadata to an image
EXPOSE	    Informs container runtime that the container listens on the specified network ports at runtime
ENV	    Sets an environment variable
ADD	    Copy new files, directories, or remote file URLs from >> into the filesystem of the container
COPY (this) Copy new files or directories >> into the filesystem of the container
ENTRYPOINT  Allows you to configure a container that will run as an executable
VOLUME	    Creates a mount point and marks it as holding externally mounted volumes from native host or other containers
USER	    Sets the username or UID to use when running the image
WORKDIR	    Sets the working directory for any RUN, CMD, ENTRYPOINT, COPY, and ADD commands
ARG	    Defines a variable that users can pass at build-time to the builder using --build-arg
ONBUILD	    Adds an instruction to be executed later, when the image is used as the base for another build
STOPSIGNAL  Sets the system call signal that will be sent to the container to exit

Dockerfile-Template

FROM debian:stretch-slim
USER root
LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
WORKDIR /app
COPY nginx-repo.crt /etc/ssl/nginx/
RUN apt-get update && apt-get upgrade -y
# --------------------------------------------------------------
# nginx config for OpenShift
RUN chmod g+rwx /var/cache/nginx /var/run /var/log/nginx
RUN sed -i.bak 's/listen\(.*\)80;/listen 8081;/' /etc/nginx/conf.d/default.conf
RUN sed -i.bak 's/^user/#user/' /etc/nginx/nginx.conf
# --------------------------------------------------------------
EXPOSE 80
STOPSIGNAL SIGTERM
CMD ["nginx", "-g", "daemon off;"]
USER 1001

Docker-Images

Mix

• maven:3.6.3-jdk-8
• maven:3.6.3-jdk-8-slim
• gradle:6.8.0-jdk8
• gradle:4.7.0-jdk8-alpine
• nginx:alpine
• node:10-alpine3.10
• openjdk:8-alpine

Image: Jenkins

• src: https://wiki.jenkins.io/display/JENKINS/Installing+Jenkins+with+Docker

export WORKSPACE=/workspace
...
sudo docker run --detach \
 --hostname jenkins.box-blue \
 --publish 49001:8080 \
 --name jenkins \
 --restart always \
 --volume $WORKSPACE/jenkins:/var/jenkins_home:z \
 --tty jenkins/jenkins

Image: GitLab

• src: https://docs.gitlab.com/omnibus/docker/

export WORKSPACE=/workspace
...
sudo docker run --detach \
  --hostname gitlab.box-blue \
  --publish 443:443 \
  --publish 80:80 \
  --publish 22:22 \
  --name gitlab \
  --restart always \
  --volume $WORKSPACE/gitlab/config:/etc/gitlab \
  --volume $WORKSPACE/gitlab/logs:/var/log/gitlab \
  --volume $WORKSPACE/gitlab/data:/var/opt/gitlab \
  gitlab/gitlab-ce:latest
...
sudo docker exec -it gitlab /bin/bash

Image: Postgres

• ref: https://hub.docker.com/_/postgres/
• ref: https://quarkus.io/guides/reactive-sql-clients

docker run -d --ulimit memlock=-1:-1 -it --rm=true --memory-swappiness=0 --name postgres -e POSTGRES_USER=db -e POSTGRES_PASSWORD=db -e POSTGRES_DB=db_01 -p 5432:5432 postgres:10.5

• ref: https://www.pgadmin.org/docs/pgadmin4/latest/container_deployment.html

docker pull dpage/pgadmin4
docker run -p 80:80 \
 --name pgadmin \
 -e 'PGADMIN_DEFAULT_EMAIL=user@mail.com' \
 -e 'PGADMIN_DEFAULT_PASSWORD=password' \
 -d dpage/pgadmin4

Image: HiveMQ

• https://www.hivemq.com/downloads/docker/

docker run --rm --name mqtt -p 8080:8080 -p 1883:1883 hivemq/hivemq4