Software and Systems How-To's, Tutorials, Demos, Notes

How to build a docker image from a Dockerfile in OpenShift

Suppose you have the following Dockerfile:

#==== BEGIN DOCKER FILE
FROM centos:latest
RUN yum install -y java-1.8.0-openjdk-devel
RUN yum install -y unzip
RUN adduser tomcat
USER tomcat
RUN cd /home/tomcat && curl -L http://www-us.apache.org/dist/tomcat/tomcat-9/v9.0.8/bin/apache-tomcat-9.0.8.zip -o apache-tomcat-9.0.8.zip
#COPY apache-tomcat-9.0.0.M19.zip /home/tomcat
RUN cd /home/tomcat && unzip apache-tomcat-9.0.8.zip  && chmod -R 777 /home/tomcat && ln -s apache-tomcat-9.0.8 tomcat
EXPOSE 8080
RUN cd /home/tomcat/tomcat/bin && chmod +x *.sh
ENTRYPOINT cd /home/tomcat/tomcat/bin && ./catalina.sh run
#==== END DOCKER FILE
  1. Create a new project 
    oc new-project test
  2. process the docker file 
    cat Dockerfile | oc new-build --to=mytomcat -D -
  3. Using the web console, go to Builds->Builds->mytomcat->View Log. Wait for the build to finish.
  4. Create a new app 
    oc new-app mytomcat
  5. Create a route 
    oc expose mytomcat
  6. Go to web and click on the route created for mytomcat.
Written on July 27th, 2018 by Bobby Corpus
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