Install DOCKER on CentOS 8 – Fix No Internet DNS Error – Easy Step by Step Tutorial – 4 Examples

Video Time Codes (Click them to skip to that part of the video).
Learn how to:
0:00 Introduction
0:31 DOCKER – Install Docker
3:32 DOCKER – Start Docker service
4:28 GROUP – Modify user account
6:58 CONTAINERS – CentOS
8:13 CONTAINERS – Ubuntu
9:06 CONTAINERS – Splunk
10:53 CONTAINERS – Minecraft Server part 1
11:30 FIX ERROR – Fix DNS error
12:00 CONTAINERS – Minecraft Server part 2

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## Commands used ##
#————————————–

# ssh
#————————————–
ssh useraccount@ip_or_hostname

# Update computer
#————————————–
sudo dnf update

# Add Docker-CE repository
#————————————–
sudo dnf config-manager –add-repo=https://download.docker.com/linux/centos/docker-ce.repo

# Find what versions are available:
#————————————–
dnf list docker-ce –showduplicates | sort -r

# Install Docker-ce
#————————————–
sudo dnf install docker-ce-[copied version]
e.g. sudo dnf install docker-ce-3:19.03.12-3.el7

# Fix dependency error
#————————————–
sudo dnf install -y https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.13-3.2.el7.x86_64.rpm

# Check status and start docker service
#————————————–
sudo systemctl status docker.service
sudo systemctl enable –now docker.service

# Add Docker group to account
#————————————–
sudo usermod -aG docker username
groups

# Show Docker versions
#————————————–
docker -v
docker version

# Docker containers
#————————————–
docker run -d -ti –name centos centos
docker exec -ti centos bash
cat /etc/os-release

docker run -d -ti –name ubuntu ubuntu
docker exec -ti ubuntu bash
cat /etc/os-release

docker run -d -p 8000:8000 -e “SPLUNK_START_ARGS=–accept-license” -e “SPLUNK_PASSWORD=Splunk1234” –name splunk splunk/splunk:latest
docker logs -f splunk
http://10.10.2.100:8000
admin Splunk1234

docker run -e EULA=TRUE -d -ti -p 25565:25565 –name minecraft itzg/minecraft-server
docker logs -f minecraft
docker exec -i minecraft rcon-cli
seed
stop

# Fix DNS issues
#————————————–
sudo nano /etc/firewalld/firewalld.conf
in conf file change:
FirewallBackend=nftables
to
FirewallBackend=iptables

# Reload Firewall
#————————————–
sudo systemctl restart firewalld

# Remove containers
#————————————–
docker ps
docker rm -f centos
docker rm -f ubuntu
docker rm -f splunk
docker rm -f minecraft

source

centos 8