docker - Dockerfile for tomcat

Question

I need to create an image with tomcat installation details.I tried many dockerfile in net and tried to build but no luck.Can anybody tell me what commands should be their in dockerfile for a successfull tomcat installation?.I dont need any official tomcat image.Thanks in advance.

Answer 1

This is what i did to solve this:

Dockerfile

FROM tomcat

MAINTAINER richard

RUN apt-get update && apt-get -y upgrade

WORKDIR /usr/local/tomcat

COPY tomcat-users.xml /usr/local/tomcat/conf/tomcat-users.xml
COPY context.xml /usr/local/tomcat/webapps/manager/META-INF/context.xml

EXPOSE 8080

I'm copying those two files in order to access the manager app from outside. If you want it too, add the following to your context and tomcat-users files

Context.xml

<Context antiResourceLocking="false" privileged="true" >
    <!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"
        allow="127.d+.d+.d+|::1|0:0:0:0:0:0:0:1" /> -->
    <Manager sessionAttributeValueClassNameFilter="java.lang.(?:Boolean|Integer|Long|Number|String)|org.apache.catalina.filters.CsrfPreventionFilter$LruCache(?:$1)?|java.util.(?:Linked)?HashMap"/>
</Context>

tomcat-users.xml

<tomcat-users xmlns="http://tomcat.apache.org/xml"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://tomcat.apache.org/xml tomcat-users.xsd"
              version="1.0">
  <user username="admin" password="secret" roles="manager-gui"/>
</tomcat-users>

Then you can build it and run it:

docker build -t name/tomcat .
docker run -d -p 8080:8080 --name some_name name/tomcat

Deploy your application as follows:

docker cp some/app.war some_name:/usr/local/tomcat/webapps/app.war