Dockerfile for tomcat

Question

我需要创建一个带有tomcat安装细节的图像。我在网上尝试了很多dockerfile并尝试构建但没有运气。任何人都可以告诉我在dockerfile中为了成功的tomcat安装应该是什么命令？。我不需要任何官方的tomcat图像。提前致谢。

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

Answer 2

There are several available options for using Tomcat in Docker. Eg there are the official versions that you can find on https://registry.hub.docker.com/_/tomcat/

But, If you want to create a file from scratch the following could be of help:

FROM ubuntu:14.04
RUN apt-get update && apt-get -y upgrade

RUN apt-get -y install software-properties-common
RUN add-apt-repository ppa:webupd8team/java
RUN apt-get -y update

# Accept the license
RUN echo "oracle-java7-installer shared/accepted-oracle-license-v1-1 boolean true" | debconf-set-selections

RUN apt-get -y install oracle-java7-installer

# Here comes the tomcat installation
RUN apt-get -y install tomcat7
RUN echo "JAVA_HOME=/usr/lib/jvm/java-7-oracle" >> /etc/default/tomcat7

# Expose the default tomcat port
EXPOSE 8080

# Start the tomcat (and leave it hanging)
CMD service tomcat7 start && tail -f /var/lib/tomcat7/logs/catalina.out

To build the image simply use docker build :

docker build -t my/tomcat .

To start the container you must mount a volume with your war-file.

docker run -v /somefolder/myapp:/var/lib/tomcat7/webapps/myapp -p 8080:8080 my/tomcat

Then you should be all set!