Dockerfile for centos and tomcat

• Make sure you have docker in your system . sudo apt-get install docker
• The dockerfile present here is part of a project present here.
• First run git clone "https://github.com/beardbytes/JavaTomcatDocker"
• Then cd JavaTomcatDocker
• Before running the dockerfile, install apache-tomcat and keep the tar file in the same directory where dockerfile id present.
• Steps to run the dockerfile :

1. Build the image : sudo docker build -t centos/tomcat8
2. See the list of images : sudo docker images ls
3. Run the container : sudo docker container run -it -d --name tomcatcontainer1 -p 8081:8080 centos/tomcat8
   • if you look into tomcat dockerfile, you will find tomcat expose port 8080, so while creating container we map tomcat container port to local machine port by using --publish <local_machine_port>:<tomcat_expose_port>
   • you will find that the container is up and running by the following command : sudo docker ps -a
4. Finally run this command : sudo docker run -it centos/tomcat8

• In case you get the error that AppStream could not be found then don't panic . I have fix for you.
• Follow these steps:

1. cd etc/docker/.
2. Make a new file with the name daemon.json in this directory.
3. Add these two lines in this file (Use editor of your choice.):
   • {"dns":["192.168.1.1","8.8.8.8"]}

• And here we go....the dockerfile starts running again.

• PS:The above fix worked for me.Or else use this.

Dockerfile2

• Run this file using the above steps , if the above file dosen't hit the end point .