docker - tomcat

FROM ubuntu
RUN mkdir opt/fsd
RUN apt-get update
RUN apt install vim --assume-yes
ADD jdk-8u231-linux-x64.tar.gz opt/fsd
ENV JAVA_HOME=/opt/fsd/jdk1.8.0_231
ENV PATH=$JAVA_HOME/bin:$PATH
ENV CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ADD apache-tomcat-9.0.29.tar.gz  opt/fsd
ENV CATALINA_HOME=/opt/fsd/apache-tomcat-9.0.29
ENV PATH=$PATH:$CATALINA_HOME/bin
COPY myapp /opt/fsd/apache-tomcat-9.0.29/webapps
EXPOSE 8080
ENTRYPOINT sh /opt/fsd/apache-tomcat-9.0.29/bin/catalina.sh run

1. create Dockerfile for tomcat and copy myapp to webapps

2. docker build -t imyapp:latest .

3. docker run -p 8080:8080  --name myapp -it imyapp /bin/bash

4. docker stop myapp

5. docker start myapp

6. docker exec -it myapp /bin/bash

ENTRYPOINT sh /opt/fsd/apache-tomcat-9.0.29/bin/catalina.sh run

ENTRYPOINT : define the command when the container is startd.