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

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  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

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  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)

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  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 <arungupta@redhat.com> ---> Using cache ---> e490dfcb3685 Step 2 : RUN yum -y update && yum clean all ---> Using cache ---> f212cb9dbcf5 Step 3 : RUN yum -y install xmlstarlet saxon augeas bsdtar unzip && yum clean all ---> Using cache ---> 28b11e6151f0 Step 4 : RUN groupadd -r jboss -g 1000 && useradd -u 1000 -r -g jboss -m -d /opt/jboss -s /sbin/nologin -c "JBoss user" jboss ---> Using cache ---> 73603eab89b7 Step 5 : WORKDIR /opt/jboss ---> Using cache ---> 9a661ae4341b Step 6 : USER jboss ---> Using cache ---> 6265153611c7 Step 7 : USER root ---> Using cache ---> 12ed28a7acb7 Step 8 : RUN yum -y install java-1.7.0-openjdk-devel && yum clean all ---> Using cache ---> 44c4bb92fa11 Step 9 : USER jboss ---> Using cache ---> 930cb2a860f7 Step 10 : ENV JAVA_HOME /usr/lib/jvm/java ---> Using cache ---> fff2c21b0a71 Step 11 : ENV WILDFLY_VERSION 8.2.0.Final ---> Using cache ---> b7b7ca7a9172 Step 12 : RUN cd $HOME && curl -O http://download.jboss.org/wildfly/$WILDFLY_VERSION/wildfly-$WILDFLY_VERSION.zip && unzip wildfly-$WILDFLY_VERSION.zip && mv $HOME/wildfly-$WILDFLY_VERSION $HOME/wildfly && rm wildfly-$WILDFLY_VERSION.zip ---> Using cache ---> a1bc79a43c77 Step 13 : ENV JBOSS_HOME /opt/jboss/wildfly ---> Using cache ---> d46fdd618d55 Step 14 : EXPOSE 8080 9990 ---> Running in 9c2c2a5ef41c ---> 8988c8cbc051 Removing intermediate container 9c2c2a5ef41c Step 15 : CMD /opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0 ---> Running in 9e28c3449ec1 ---> d989008d1f84 Removing intermediate container 9e28c3449ec1 Successfully built d989008d1f84

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  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 <arungupta@redhat.com> ---> Using cache ---> e490dfcb3685 Step 2 : RUN yum -y update && yum clean all ---> Using cache ---> f212cb9dbcf5 Step 3 : RUN yum -y install xmlstarlet saxon augeas bsdtar unzip && yum clean all ---> Using cache ---> 28b11e6151f0 Step 4 : RUN groupadd -r jboss -g 1000 && useradd -u 1000 -r -g jboss -m -d /opt/jboss -s /sbin/nologin -c "JBoss user" jboss ---> Using cache ---> 73603eab89b7 Step 5 : WORKDIR /opt/jboss ---> Using cache ---> 9a661ae4341b Step 6 : USER jboss ---> Using cache ---> 6265153611c7 Step 7 : USER root ---> Using cache ---> 12ed28a7acb7 Step 8 : RUN yum -y install java-1.7.0-openjdk-devel && yum clean all ---> Using cache ---> 44c4bb92fa11 Step 9 : USER jboss ---> Using cache ---> 930cb2a860f7 Step 10 : ENV JAVA_HOME /usr/lib/jvm/java ---> Using cache ---> fff2c21b0a71 Step 11 : ENV WILDFLY_VERSION 8.2.0.Final ---> Using cache ---> b7b7ca7a9172 Step 12 : RUN cd $HOME && curl -O http://download.jboss.org/wildfly/$WILDFLY_VERSION/wildfly-$WILDFLY_VERSION.zip && unzip wildfly-$WILDFLY_VERSION.zip && mv $HOME/wildfly-$WILDFLY_VERSION $HOME/wildfly && rm wildfly-$WILDFLY_VERSION.zip ---> Using cache ---> a1bc79a43c77 Step 13 : ENV JBOSS_HOME /opt/jboss/wildfly ---> Using cache ---> d46fdd618d55 Step 14 : EXPOSE 8080 9990 ---> Running in 9c2c2a5ef41c ---> 8988c8cbc051 Removing intermediate container 9c2c2a5ef41c Step 15 : CMD /opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0 ---> Running in 9e28c3449ec1 ---> d989008d1f84 Removing intermediate container 9e28c3449ec1 Successfully built d989008d1f84

  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 <none> <none> 0281986b0ed8 44 hours ago 749.5 MB <none> <none> 1a5e1aeadc85 44 hours ago 607.7 MB wildfly-centos latest 97c8780a7d6a 45 hours ago 619.6 MB registry latest 7e2db37c6564 13 days ago 411.6 MB centos latest ae0c2d0bdc10 3 weeks ago 224 MB jboss/wildfly latest 365390553f92 4 weeks ago 948.7 MB ubuntu latest 5506de2b643b 4 weeks ago 199.3 MB

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  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 <none>                     <none>              0281986b0ed8        44 hours ago        749.5 MB <none>                     <none>              1a5e1aeadc85        44 hours ago        607.7 MB wildfly-centos             latest              97c8780a7d6a        45 hours ago        619.6 MB registry                   latest              7e2db37c6564        13 days ago         411.6 MB centos                     latest              ae0c2d0bdc10        3 weeks ago         224 MB jboss/wildfly              latest              365390553f92        4 weeks ago         948.7 MB ubuntu                     latest              5506de2b643b        4 weeks ago         199.3 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}

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  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

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  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!

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