Docker image push

To push a image to docker hub follow below,

Use docker container ls command to list running container image details.

 [root@jkcli ~]# docker container ls
CONTAINER ID   IMAGE     COMMAND              CREATED          STATUS          PORTS                                   NAMES
cb72f5d90279   httpd     "httpd-foreground"   21 minutes ago   Up 21 minutes   0.0.0.0:8080->80/tcp, :::8080->80/tcp   jkapache
[root@jkcli ~]#

Use docker container commit command to commit container as a image with tag.

[root@jkcli ~]# docker container commit cb72f5d90279 jk-httpd:test
sha256:8daf5db17d6fdb0fd6ceea7e4d6ed38d22c3fdad6375f479ed6fc7986eec4a61
[root@jkcli ~]#

You can now list and see the created image is available.

[root@jkcli ~]# docker image ls
REPOSITORY   TAG       IMAGE ID       CREATED              SIZE
jk-httpd     test      8daf5db17d6f   About a minute ago   189MB
httpd        latest    30287d899656   7 days ago           138MB
nginx        latest    d1a364dc548d   5 weeks ago          133MB
[root@jkcli ~]#

To upload your newly created image to docker hub. First you have to login to docker with docker login credentials. To do this use, docker login command.

[root@jkcli ~]# 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: karthick04

Password: XXXXX

Now we can tag the image across the repository created in the docker hub. Here I have already created a repository karthick04/jkrepo. 

Command : docker tag source_image:tag target_image:tag

[root@jkcli ~]# docker tag jk-httpd:test karthick04/jkrepo:version1
REPOSITORY          TAG        IMAGE ID       CREATED         SIZE
karthick04/jkrepo   version1   8daf5db17d6f   9 minutes ago   189MB
jk-httpd            test       8daf5db17d6f   9 minutes ago   189MB
httpd               latest     30287d899656   7 days ago      138MB
nginx               latest     d1a364dc548d   5 weeks ago     133MB
[root@jkcli ~]# 

[root@jkcli ~]# docker image ls

To push the image finally to the docker hub use docker image push command. 

[root@jkcli ~]# docker image push karthick04/jkrepo:version1
The push refers to repository [docker.io/karthick04/jkrepo]
c54811c7708d: Pushed
dfd488a286c9: Pushed
15176fdb9a61: Pushed
61172cb5065c: Pushed
9fbbeddcc4e4: Pushed
764055ebc9a7: Pushed
version1: digest: sha256:c6271d65a6b6a4b6274adcbd51b0ddd5dab1b94b8112ccdbd7d407770bdb238b size: 1578
[root@jkcli ~]#

Successfully we have pushed the image to docker hub, we can see this image in docker hub now

https://hub.docker.com/r/karthick04/jkrepo

Also you can pull same image using docker pull karthick04/jkrepo:version1

[root@jkcli ~]# docker pull karthick04/jkrepo:version1
version1: Pulling from karthick04/jkrepo
b4d181a07f80: Already exists
4b72f5187e6e: Already exists
12b2c44d04b2: Already exists
ef481fc2a03a: Already exists
d483d945fcab: Already exists
6b6a1b4ae105: Pull complete
Digest: sha256:c6271d65a6b6a4b6274adcbd51b0ddd5dab1b94b8112ccdbd7d407770bdb238b
Status: Downloaded newer image for karthick04/jkrepo:version1
docker.io/karthick04/jkrepo:version1
[root@jkcli ~]# docker image ls
REPOSITORY          TAG        IMAGE ID       CREATED          SIZE
karthick04/jkrepo   version1   8daf5db17d6f   26 minutes ago   189MB
httpd               latest     30287d899656   7 days ago       138MB
nginx               latest     d1a364dc548d   5 weeks ago      133MB
[root@jkcli ~]#