Summary:

In this article we will learn about Docker Build, Pull and Run command. When you run, “docker run -d -it <container-name> <image:tag>” command, docker demon search local registry for specified “Image with tag”. If the Image is found, a new container is created with the image.

However, if the Image is not found in local registry, docker demon will search Docker Hub for the image in the Public Repository (& Private Registry as well if you are logged into Docker Hub account from the client machine). Once the specified Image is found on Docker Hub, it is Pulled into the client machine in local repository. New container is created from with the image

We can also Build Images using Docker File (with custom configuration)

Prerequisite

Create a Docker Hub account:

https://hub.docker.com/signup

Create 2 Repository, Private and Public

Private Registry: ashmisinha–priv

Public Registry : ashmi_sinha2019             

Docker Architecture:

—-

BUILD

Steps to ‘BUILD’ Docker Image for Docker Swarm Visualizer (NodeJS Image: stefanscherer/node-windows:latest)

1. Copy Complete Docker Swarm Visualizer files to C:\Users\JimmyCater\docker-swarm-visualizer-master

https://github.com/dockersamples/docker-swarm-visualizer

• Edit Docker File, ‘Dockerfile.windows’ with following lines:

FROM stefanscherer/node-windows:latest

• Rename ‘Dockerfile.windows’ to ‘Dockerfile’ (Remove other Docker File to Desktop)

• Run following command in the PowerShell:

docker build -t visualizer:latest 

• New Docker Images will be created:

docker images

REPOSITORY                                 TAG                 IMAGE ID            CREATED             SIZE

visualizer                                 latest              412ba112590e        12 minutes ago      462MB

mcr.microsoft.com/windows/servercore/iis   latest              a753087f34dc        3 weeks ago         3.87GB

mcr.microsoft.com/windows/nanoserver       1809-amd64          9e7d556b2b51        4 weeks ago         251MB

stefanscherer/node-windows                 latest              46b86f7ea7e6        3 months ago        352MB

PUSH

Steps to ‘PUSH’ Images to Docker Hub Repository:

1. Login to the Docker Hub Account from any Host:

docker login

Login with your Docker ID to push and pull images from Docker Hub. If you don’t have a Docker ID, head over to https://hub.docker.com to create one.

Username: user-name

Password: xxxxxxxxx

Login Succeeded

2. Create new Tag for Images for Image IDs: afa9d75a343e | 6c3630785aa2  

docker images

REPOSITORY                                 TAG                 IMAGE ID            CREATED             SIZE

ashmisinha                                  profile             afa9d75a343e        7 days ago          5.2GB

visualizer                                     latest              6c3630785aa2        12 days ago         462MB 

docker tag 6c3630785aa2 ashmisinha/ashmi_sinha2019:visualizer-1809

docker tag afa9d75a343e ashmisinha/ashmisinha-priv:portfolio

3. Upload these images to Docker Hub Repository

Push Image with Tag,  ‘visualizer-1809’ to public repository, ‘ashmisinha/ashmi_sinha2019’

docker push ashmisinha/ashmi_sinha2019:visualizer-1809

Push Image with Tag, ‘portfolio‘ to private repository, ‘ashmisinha/ashmisinha-priv’

docker push ashmisinha/ashmisinha-priv:portfolio

4. Login to the DockerHub and validate Images in Public and Private Repository

1. Private Repository

1 Image with Tag, ‘portfolio’

• Public Repository

1 Image with Tag, ‘visualizer-1809’

5. Search Docker Hub for Image: ashmi_sinha2019

5. Docker Hub

5. Host

docker search ashmi_sinha2019

NAME                         DESCRIPTION                           STARS               OFFICIAL            AUTOMATED

ashmisinha/ashmi_sinha2019   Docker Images for Windows 2019 1809   0

Note: Images in the Private Repository is not available on Docker Hub Public search

docker search ashmisinha-priv

NAME                DESCRIPTION         STARS               OFFICIAL            AUTOMATED

PULL

Steps to ‘PULL’ Images to Docker Hub Repository:

1. Search Docker Hub for Images and search for Repository: ashmi_sinha2019

2. To download Image, ‘visualizer-1809’, switch to ‘Tag’ and copy Docker Pull Command for Image, ‘visualizer-1809’

3. On Host, run Docker Pull command to download image, ‘visualizer-1809’

docker pull ashmisinha/ashmi_sinha2019:visualizer-1809

visualizer-1809: Pulling from ashmisinha/ashmi_sinha2019

Digest: sha256:35bf30679c4bd2e050081f53f9aa8e233c6303aa7adcd4b083b683093e9d1b55

Status: Downloaded newer image for ashmisinha/ashmi_sinha2019:visualizer-1809

docker.io/ashmisinha/ashmi_sinha2019:visualizer-1809

docker images 

REPOSITORY                                 TAG                 IMAGE ID            CREATED             SIZE

ashmisinha/ashmi_sinha2019                 visualizer-1809     6c3630785aa2        13 days ago         462MB

Note: You will not be able to search for Images in Private Repository

RUN

Steps to ‘RUN’ Container with Image: visualizer-1809

1. Create Container, ‘visualizer’ with Image, ‘ashmisinha/ashmi_sinha2019:visualizer-1809′

docker run -d -p 8080:80 -e DOCKER_HOST=${ip}:2375 --name=visualizer ashmisinha/ashmi_sinha2019:visualizer-1809

c93997c979df00067949a62a0812563013862a2e09cc6a3df104eddfe1fcbc74

docker ps

CONTAINER ID        IMAGE                                        COMMAND             CREATED             STATUS                            PORTS                            NAMES

c93997c979df        ashmisinha/ashmi_sinha2019:visualizer-1809   “npm.cmd start”     5 seconds ago       Up 3 seconds (health: starting)   8080/tcp, 0.0.0.0:8080->80/tcp   visualizer 

2. Filter the Container for .NetworkSettings.Networks.nat.IPAddres

docker inspect -f    "{{ .NetworkSettings.Networks.nat.IPAddress }}" visualizer 

172.28.xx.xx

3. Open Browser and type following as URL: 172.28.xx.xx:8080 to access visualizer web console