Docker series: 4. Push your Docker image to Hub

Push your Docker image to hub

This article illustrates how to push or upload your image to the docker hub so that it can be available for download.

root@machine1 ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu latest 4c108a37151f 4 weeks ago 64.2MB
centos centos7 9f38484d220f 4 months ago 202MB
centos latest 9f38484d220f 4 months ago 202MB
hello-world latest fce289e99eb9 6 months ago 1.84kB

Run your container and run any script or install packages that are rquired for your image to be part of.

Here, I am trying to create a centos 7 image for any Hadoop node installation with prerequisites setup.

[root@machine1 ~]# docker exec -i -t 45fe220d4030 /bin/bash
[root@45fe220d4030 /]# vi presetup.sh
[root@45fe220d4030 /]# chmod +x presetup.sh
[root@45fe220d4030 /]# ./presetup.sh
[root@45fe220d4030 mydir]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)

As you can see it has installed Java and did other stuff as apart of my Hadoop prerequisites.

[root@45fe220d4030 ~]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)
[root@45fe220d4030 ~]# exit

Time to commit your image locally.Get your container id using following command.

[root@machine1 ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
45fe220d4030 centos:latest “/bin/bash” 13 hours ago Up 13 hours myoscontainer

commit and list

[root@machine1 ~]# docker commit 45fe220d4030 jacksparrow007/hadooppresetup
sha256:2c3a110c721e9bfbc3d098a1d5082a8bcabdc476d695a067e8be6e8eea6c8441
[root@machine1 ~]# docker image ls
REPOSITORY                      TAG                 IMAGE ID            CREATED             SIZE
jacksparrow007/hadooppresetup   latest              2c3a110c721e        4 seconds ago       658MB
hadooppresetup                  7.6                 480bb5e4c896        4 minutes ago       658MB
ubuntu                          latest              4c108a37151f        4 weeks ago         64.2MB
centos                          centos7             9f38484d220f        4 months ago        202MB
centos                          latest              9f38484d220f        4 months ago        202MB
hello-world                     latest              fce289e99eb9        6 months ago        1.84kB

Push your repository to your personal docker hub repo.

[root@machine1 ~]# docker push jacksparrow007/hadooppresetup
The push refers to repository [docker.io/jacksparrow007/hadooppresetup]
6a120d17a342: Pushed
d69483a6face: Pushed
latest: digest: sha256:82ab86d3dbc72440482c85328d99a42cc6304aa27b320d0dff281515b75f82da size: 742
[root@machine1 ~]#

Login to you docker hub and see your image is uploaded over there.

You can use it anywhere now.

Now you are ready to pull this repo.

docker push jacksparrow007/hadooppresetup:tagname

Series next read;

https://medium.com/cloudscoop/cloudscoop-docker-series-remove-docker-image-2150e43fb771