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Docker auf RHEL / CentOS 7
In this 3-article series, we will discuss about Docker, is an open-source lightweight virtualization tool
which runs at top of Operating System level, allowing users to create, run and deploy applications, encapsulated into small containers.
Installation von Docker und Docker-Compose
Step 1 - Install deps, add docker Repo and setup Docker:
# yum install -y yum-utils device-mapper-persistent-data lvm2 # yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo # yum update # yum install docker-ce docker-ce-cli containerd.io # systemctl start docker && systemctl enable docker
Step 2 - Install docker-compose binary:
# newest_version="$(curl -s https://api.github.com/repos/docker/compose/releases/latest | grep -Po '"tag_name": "\K.*?(?=")')" # curl -L "https://github.com/docker/compose/releases/download/${newest_version}/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose # chmod +x /usr/local/bin/docker-compose # curl -L https://raw.githubusercontent.com/docker/compose/$(docker-compose version --short)/contrib/completion/bash/docker-compose -o /etc/bash_completion.d/docker-compose # docker-compose version
Installation Docker Environment
Step 1 - Create Project Folder:
# mkdir /opt/docker-PROJECT
Step 2 - Create Project Docker Compose-File:
# vim /opt/docker-PROJECT/docker_compose.yml
DEMO - Docker Compose File:
version: "3.2" services: # ---------------------------------------------------------------------------- pihole: image: pihole/pihole:latest container_name: "pihole-main" volumes: - /opt/docker-pihole/pihole/:/etc/pihole/ - /opt/docker-pihole/dnsmasq.d/:/etc/dnsmasq.d/ - /opt/docker-pihole/adminCMS/pi-hole.css:/var/www/html/admin/style/pi-hole.css - /etc/localtime:/etc/localtime:ro environment: - VIRTUAL_HOST=www.blackgate.org - ServerIP=192.168.1.2 - DNS1=127.0.0.1#5353 - DNS2=no - TZ=Europe/Zurich - WEBPASSWORD=SUPERSECRETPASSWORD - WEB_PORT=81 - INTERFACE=enp1s0 #ports: # - 53:53/tcp # - 53:53/udp # - 67:67/udp # - 81:80 #networks: # - local restart: always network_mode: "host" # ------------------------------------------------------------------------------ #networks: # local: # driver: bridge
Step x - Start / Stop Docker Compose Projects:
# docker-compose -f /opt/docker-PROJECT/docker_compose.yml up -d # docker-compose -f /opt/docker-PROJECT/docker_compose.yml down
Docker Grundlagen
This type of Linux containers are proven to be fast, portable and secure. The processes that run in a Docker container are always isolated from the main host, preventing outside tampering.
Part 2: How to Deploy and Run Applications into Docker Containers on CentOS/RHEL 7/6
https://www.linuxtechi.com/install-use-docker-compose-to-deploy-containers-in-centos7/
This tutorial provides a starting point on how to install Docker, create and run Docker containers on CentOS/RHEL 7/6, but barley scratches the surface of Docker.
https://www.tecmint.com/install-docker-and-learn-containers-in-centos-rhel-7-6/
Baseimages: → RHEL Atomic-Image:
Interessante Docker Projekte: