Tech Tip #57 explained how to create your own Docker images. That particular blog specifically showed how to build your own WildFly Docker images on CentOS and Ubuntu. Now you are ready to share your images with rest of the world. That’s where Docker Hub comes in handy.

Docker Hub is the “distribution component” of Docker, or a place to store and search images. From the Getting Started with Docker Hub docs …

The Docker Hub is a centralized resource for working with Docker and its components. Docker Hub helps you collaborate with colleagues and get the most out of Docker.

Starting and pushing images to with Docker Hub is pretty straight forward.

• Pushing images to Docker Hub require an account. It can be created as explained here. Or rather easily by using docker login command.

  wildfly-centos> docker login
  Username: arungupta
  Password: 
  Email: arun.gupta@gmail.com
  Login Succeeded
  

  Searching on WildFly shows there are 72 images:

  wildfly-centos> docker search wildfly
  NAME DESCRIPTION STARS OFFICIAL AUTOMATED
  jboss/wildfly WildFly application server image 42 [OK]
  sewatech/wildfly Debian + WildFly 8.1.0.Final with OpenJDK ... 1 [OK]
  kamcord/wildfly 1 
  openshift/wildfly-8-centos 1 [OK]
  abstractj/wildfly AeroGear Wildfly Docker image 1 
  jsightler/wildfly_nightly Nightly build from wildfly's github master... 1 
  centos/wildfly CentOS based WildFly Docker image 1 
  aerogear/unifiedpush-wildfly 1 [OK]
  t0nyhays/wildfly 1 [OK]
  tsuckow/wildfly-propeller Dockerization of my application *Propeller... 0 [OK]
  n3ziniuka5/wildfly 0 [OK]
  snasello/wildfly 0 [OK]
  jboss/keycloak-adapter-wildfly 0 [OK]
  emsouza/wildfly 0 [OK]
  sillenttroll/wildfly-java-8 WildFly container with java 8 0 [OK]
  jboss/switchyard-wildfly 0 [OK]
  n3ziniuka5/wildfly-jrebel 0 [OK]
  dfranssen/docker-wildfly 0 [OK]
  wildflyext/wildfly-camel WildFly with Camel Subsystem 0 
  ianblenke/wildfly 0 [OK]
  arcamael/docker-wildfly 0 [OK]
  dmartin/wildfly 0 [OK]
  pires/wildfly-cluster-backend 0 [OK]
  aerogear/push-quickstarts-wildfly-dev 0 [OK]
  faga/wildfly Wildfly application server with ubuntu. 0 
  abstractj/unifiedpush-wildfly AeroGear Wildfly Docker image 0 
  murad/wildfly - oficial centos image - java JDK "1.8.0_0... 0 
  aerogear/unifiedpush-wildfly-dev 0 [OK]
  ianblenke/wildfly-cluster 0 [OK]
  blackhm/wildfly 0 
  khipu/wildfly8 0 [OK]
  rowanto/docker-wheezy-wildfly-java8 0 [OK]
  ordercloud/wildfly 0 
  lavaliere/je-wildfly A Jenkins Enterprise demo master with a Wi... 0 
  adorsys/wildfly Ubuntu - Wildfly - Base Image 0 
  akalliya/wildfly 0 
  lavaliere/joc-wildfly Jenkins Operations Center master with an a... 0 
  tdiesler/wildfly 0 
  apiman/on-wildfly8 0 [OK]
  rowanto/docker-wheezy-wildfly-java8-ex 0 [OK]
  arcamael/blog-wildfly 0 
  lavaliere/wildfly 0 
  jfaerman/wildfly 0 
  yntelectual/wildfly 0 
  svenvintges/wildfly 0 
  dbrotsky/wildfly 0 
  luksa/wildfly 0 
  tdiesler/wildfly-camel 0 
  blackhm/wildfly-junixsocket 0 
  abstractj/unifiedpush-wildfly-dev AeroGear UnifiedPush server developer envi... 0 
  abstractj/push-quickstarts-wildfly-dev AeroGear UnifiedPush Quickstarts developer... 0 
  bn3t/wildfly-wicket-examples An image to run the wicket-examples on wil... 0 
  lavaliere/wildfly-1 0 
  munchee13/wildfly-node 0 
  munchee13/wildfly-manager 0 
  munchee13/wildfly-dandd 0 
  munchee13/wildfly-admin 0 
  bparees/wildfly-8-centos 0 
  lecoz/wildflysiolapie fedora latest, jdk1.8.0_25, wildfly-8.1.0.... 0 
  lecoz/wildflysshsiolapie wildfly 8.1.0.Final, jdk1.8.0_25, sshd, fe... 0 
  wildflyext/example-camel-rest 0 
  pepedigital/wildfly 0 [OK]
  tsuckow/wildfly JBoss Wildfly 8.1.0.Final standalone mode ... 0 [OK]
  mihahribar/wildfly Dockerfile for Wildfly running on Ubuntu 1... 0 [OK]
  hpehl/wildfly-domain Dockerfiles based on "jboss/wildfly" to se... 0 [OK]
  raynera/wildfly 0 [OK]
  hpehl/wildfly-standalone Dockerfile based on jboss/wildfly to setup... 0 [OK]
  aerogear/wildfly 0 [OK]
  piegsaj/wildfly 0 [OK]
  wildflyext/wildfly Tagged versions JBoss WildFly 0
  

  Official images are tagged jboss/wildfly.

• In order to push your own image, it needs to be built as a named image otherwise you’ll get an error as shown:

  2014/11/26 09:59:37 You cannot push a "root" repository. Please rename your repository in <user>/<repo> (ex: arungupta/wildfly-centos)
  
  

  This can be easily done as shown:

  wildfly-centos> docker build -t="arungupta/wildfly-centos" .
  Sending build context to Docker daemon 4.096 kB
  Sending build context to Docker daemon 
  Step 0 : FROM centos
   ---> ae0c2d0bdc10
  Step 1 : MAINTAINER Arun Gupta 

  docker build command builds the image, -t specifies the repository name to be applied to the resulting image.

• Once the image is built, it can be verified as:

  wildfly-centos> docker images
  REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
  arungupta/wildfly-centos latest d989008d1f84 14 hours ago 619.6 MB
  wildfly-ubuntu latest a2e96e76eb10 43 hours ago 749.5 MB
  

  Notice the first line shows the named image arungupta/wildfly-centos.

• This image can then be pushed to Docker Hub as:

  wildfly-centos> docker push arungupta/wildfly-centos
  The push refers to a repository [arungupta/wildfly-centos] (len: 1)
  Sending image list
  Pushing repository arungupta/wildfly-centos (1 tags)
  511136ea3c5a: Image already pushed, skipping 
  5b12ef8fd570: Image already pushed, skipping 
  ae0c2d0bdc10: Image already pushed, skipping 
  e490dfcb3685: Image successfully pushed 
  f212cb9dbcf5: Image successfully pushed 
  28b11e6151f0: Image successfully pushed 
  73603eab89b7: Image successfully pushed 
  9a661ae4341b: Image successfully pushed 
  6265153611c7: Image successfully pushed 
  12ed28a7acb7: Image successfully pushed 
  44c4bb92fa11: Image successfully pushed 
  930cb2a860f7: Image successfully pushed 
  fff2c21b0a71: Image successfully pushed 
  b7b7ca7a9172: Image successfully pushed 
  a1bc79a43c77: Image successfully pushed 
  d46fdd618d55: Image successfully pushed 
  8988c8cbc051: Image successfully pushed 
  d989008d1f84: Image successfully pushed 
  Pushing tag for rev [d989008d1f84] on {https://cdn-registry-1.docker.io/v1/repositories/arungupta/wildfly-centos/tags/latest}
  

• And you can verify this by pulling the image:

  wildfly-centos> docker pull arungupta/wildfly-centos
  Pulling repository arungupta/wildfly-centos
  d989008d1f84: Download complete 
  511136ea3c5a: Download complete 
  5b12ef8fd570: Download complete 
  ae0c2d0bdc10: Download complete 
  e490dfcb3685: Download complete 
  f212cb9dbcf5: Download complete 
  28b11e6151f0: Download complete 
  73603eab89b7: Download complete 
  9a661ae4341b: Download complete 
  6265153611c7: Download complete 
  12ed28a7acb7: Download complete 
  44c4bb92fa11: Download complete 
  930cb2a860f7: Download complete 
  fff2c21b0a71: Download complete 
  b7b7ca7a9172: Download complete 
  a1bc79a43c77: Download complete 
  d46fdd618d55: Download complete 
  8988c8cbc051: Download complete 
  Status: Image is up to date for arungupta/wildfly-centos:latest
  

Enjoy!