Docker architecture details and Install Docker in Centos /RHEL. Part-2

 

Docker Architecture Details :-

Client (User) run command :-  

1. Docker Build à “docker image build -t myubuntu:1 . “ for image created on DOCKER_HOST.
2. Docker Pull à “docker pull ubuntu:18.04” for get ubuntu-18 image from docker Registry (docker public repo) on Docker Host/ docker machine.
3. Docker run à “docker run -itd ubuntu:18.04” for run ubuntu image on docker machine. 

Installing Docker :-

For RHEL/CentOS 6 32-64 Bit

#wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm#

#rpm -ivh epel-release-6-8.noarch.rpm

For RHEL/CentOS 6 64-Bit

#wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

#rpm -ivh epel-release-6-8.noarch.rpm

For CentOS/RHEL 7

# yum install docker 

# yum install device-mapper-event-libs

For RHEL 6

# yum install docker-io

# yum install device-mapper-event-libs

For RHEL/CentOS 7

# systemctl start docker.service

# systemctl status docker.service

# systemctl enable docker.service

For RHEL/CentOS 6

# service docker start

# service docker status

# chkconfig docker on

Verify Installation :-

# docker --version

Docker version 19.03.6-ce, build 369ce74

Install bash-completion for auto docker commands :-

# yum -y install bash-completion

# curl https://raw.githubusercontent.com/docker/docker-ce/master/components/cli/contrib/completion/bash/docker  -o  /etc/bash_completion.d/docker.sh