Fedora 27
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Docker : Install
2017/12/21
 
Install Docker which is the Operating System-Level Virtualization Tool, which automates the deployment of applications inside Containers.
[1] Install Docker.
[root@dlp ~]#
dnf -y install docker
[root@dlp ~]#
systemctl start docker

[root@dlp ~]#
systemctl enable docker

[2] Download an official image and create a Container and output the words [Welcome to the Docker World] inside the Container.
# download the image

[root@dlp ~]#
docker pull fedora

Using default tag: latest
Trying to pull repository registry.fedoraproject.org/fedora
.....
.....
# run echo inside Container

[root@dlp ~]#
docker run fedora /bin/echo "Welcome to the Docker World"

Welcome to the Docker World
[3] Connect to the interactive session of a Container with [i] and [t] option like follows. If exit from the Container session, the process of a Container finishes.
[root@dlp ~]#
docker run -i -t fedora /bin/bash

[root@ce94d76e7283 /]#    
# Container's console
[root@ce94d76e7283 /]#
uname -a

Linux ce94d76e7283 4.14.3-300.fc27.x86_64 #1 SMP Mon Dec 4 17:18:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[root@ce94d76e7283 /]#
exit

exit
[root@dlp ~]#    
# come back
[4] If exit from the Container session with keeping container's process, push [Ctrl+p] and [Ctrl+q] key.
[root@dlp ~]#
docker run -i -t fedora /bin/bash

[root@368b6f803394 /]# [root@dlp ~]#    
# Ctrl+p, Ctrl+q
# show docker process

[root@dlp ~]#
docker ps

CONTAINER ID   IMAGE     COMMAND       CREATED          STATUS           PORTS     NAMES
368b6f803394   fedora    "/bin/bash"   31 seconds ago   Up 30 seconds              peaceful_khorana

# connect to container's session

[root@dlp ~]#
docker exec -it 368b6f803394 /bin/bash

[root@368b6f803394 /]#    
# connected
# shutdown container's process from Host's console

[root@dlp ~]#
docker kill 368b6f803394

[root@dlp ~]#
docker ps

CONTAINER ID    IMAGE          COMMAND       CREATED          STATUS          PORTS     NAMES
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