Docker : Install2017/07/30

	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@3bbfa01408ff /]#

# Container's console

[root@3bbfa01408ff /]#

uname -a

Linux 3bbfa01408ff 4.11.9-300.fc26.x86_64 #1 SMP Wed Jul 5 16:21:56 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[root@3bbfa01408ff /]#

exit

exit
[root@dlp ~]#

# 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@86c57db58a2f /]# [root@dlp ~]#

# Ctrl+p, Ctrl+q

# show docker process

[root@dlp ~]#

docker ps

CONTAINER ID   IMAGE     COMMAND       CREATED          STATUS           PORTS   NAMES
86c57db58a2f   fedora    "/bin/bash"   40 seconds ago   Up 39 seconds            elastic_euclid

# connect to container's session

[root@dlp ~]#

docker exec -it 86c57db58a2f /bin/bash

[root@86c57db58a2f /]#

# connected

# shutdown container's process from Host's console

[root@dlp ~]#

docker kill 86c57db58a2f

[root@dlp ~]#

docker ps

CONTAINER ID    IMAGE          COMMAND       CREATED          STATUS          PORTS     NAMES

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