Docker Installation & Configuration ON CENTOS 7

Docker Installation & Configuration ON CENTOS 7

1. Create Docker Repo. 

#yum install -y yum-utils

#yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

2. Install docker.

yum install docker-ce docker-ce-cli containerd.io

3. Start docker service.

systemctl start docker

4. Verify Docker Running Properly.
[root@dockertest ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world

c04b14da8d14: Pull complete
Digest: sha256:0256e8a36e2070f7bf2d0b0763dbabdd67798512411de4cdcf9431a1feb60fd9
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

5. Start docker at boot.
[root@dockertest ~]# chkconfig docker on
Note: Forwarding request to 'systemctl enable docker.service'.
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@dockertest ~]#

6. Show all containers in the system.
[root@dockertest ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                     PORTS               NAMES
10682a232910        hello-world         "/hello"            8 minutes ago       Exited (0) 8 minutes ago                       modest_cori
[root@dockertest ~]#

7. Check all the Images in the local host.
[root@dockertest ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
hello-world         latest              c54a2cc56cbb        5 days ago          1.848 kB
[root@dockertest ~]#
[root@dockertest ~]#