Running Tomcat with PostgreSql using Dockerfile -

i want run tomcat postgresql database within same dockerfile.

i have following dockerfile

from tomcat:8-jre7  maintainer "sonam <mymail@gmail.com>"  run apt-get -y update  add simplewebapp.war /usr/local/tomcat/webapps/  run apt-get update && apt-get -y upgrade  postgres 

when run docker image, can't access tomcat if comment out postgres. how postgres running , tomcat too?

thanks

you can take 1 image base, same can have 1 os installed.

if need have 2 applications installed, need build own container - either starting 1 , running sequence of commands in dockerfile need install other app, or start base os image, , install both.

alternatively - why need them in same container? --link might want, more effectively. run 2 containers, , link them.