Podman+Tomcat tutorial

A basic tutorial on running a web app on Tomcat using Podman (based on a docker tutorial)

Steps

• Install podman.
• Clone this repository

$ git clone https://github.com/emverdes/docker-tomcat-tutorial.git

$ cd docker-tomcat-tutorial

Build the image

$ podman build -t tomcat-demo:1 .

Run the image

$ podman run -p 8008:8080 --name demo1 tomcat-demo:1

• In your browser go to http://localhost:8008
• Run another instance for load balancing

$ podman run -p 8009:8080 --name demo1 tomcat-demo:1

Simple apache reverse proxy

Add to a VirtualHost in your apache web server configuration. Replace localhost with the hostname of the host running your containers. Remember to open up the ports in your firewall if needed.

ProxyPass "/sample"  "http://localhost:8008/sample"
ProxyPassReverse "/sample"  "http://localhost:8008/sample"

Apache proxy loadbalancer for 2 containers

<Proxy "balancer://mycluster">
    BalancerMember "http://localhost:8008/sample"
    BalancerMember "http://localhost:8009/sample"
</Proxy>
ProxyPass        "/" "balancer://mycluster/"
ProxyPassReverse "/" "balancer://mycluster/"

For reverse proxy

• #setsebool -P httpd_can_network_connect on
• #setsebool -P httpd_can_network_relay on

Links

Sample Tomcat web app