Dockerfile making mirror: jdk+tomcat

1. Write dockerfile

FROM  centos:7.2.1511
MAINTAINER zhu <[email protected]>


#Create a directory
RUN mkdir -p /xx/java/jdk1.8.0_151
#Add the jdk folder in the current directory to the mirror
ADD jdk1.8.0_151 /xx/java/jdk1.8.0_151


#Create tomcat directory
RUN mkdir -p /xx/apache-tomcat-7.0.82
#Add the tomcat folder in the current directory to the mirror
ADD apache-tomcat-7.0.82 /xx/apache-tomcat-7.0.82


#Add environment variables
ENV JAVA_HOME=/xx/java/jdk1.8.0_151
ENV CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/tools.jar:${JAVA_HOME}/lib/dt.jar
ENV PATH=$PATH:$JAVA_HOME/bin
ENV CATALINA_HOME=/xx/apache-tomcat-7.0.82
ENV PATH=$PATH:${CATALINA_HOME}/bin


# Expose port 8080
EXPOSE 8080

CMD ["/xx/apache-tomcat-7.0.82/bin/catalina.sh","run"]

CMD must be written in this way. Other CMD bash xx.sh is also not easy to use

And it must be catalina.sh, and it is not easy to replace it with startup.sh.

docker logs container id View container startup logs

reason:

catalina.sh

 touch "$CATALINA_OUT"
  if [ "$1" = "-security" ] ; then
    if [ $have_tty -eq 1 ]; then
      echo "Using Security Manager"
    fi
    shift
    eval $_NOHUP "\"$_RUNJAVA\"" "\"$LOGGING_CONFIG\"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \
      -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \
      -Djava.security.manager \
      -Djava.security.policy=="\"$CATALINA_BASE/conf/catalina.policy\"" \
      -Dcatalina.base="\"$CATALINA_BASE\"" \
      -Dcatalina.home="\"$CATALINA_HOME\"" \
      -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \
      org.apache.catalina.startup.Bootstrap "$@" start \
      >> "$CATALINA_OUT" 2>&1 "&"


  else
    eval $_NOHUP "\"$_RUNJAVA\"" "\"$LOGGING_CONFIG\"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \
      -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \
      -Dcatalina.base="\"$CATALINA_BASE\"" \
      -Dcatalina.home="\"$CATALINA_HOME\"" \
      -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \
      org.apache.catalina.startup.Bootstrap "$@" start \
      >> "$CATALINA_OUT" 2>&1 "&"

  be

Remove the above red part, you can use startup.sh

CMD bash /daas/apache-tomcat-7.0.82/bin/startup.sh

also ok

2. Generate image
docker build -t custom image name: tag .
For example:
docker build -t jdk1.8.tomcat7:0.0.1 .




3. Run
docker run --name zcy1 -d -p 8020:8080 720902d110bc

Verify that the startup was successful

docker ps 

If there is, the startup is successful, otherwise it fails, you need to delete the container, delete the image, and make a new one

docker rm container id

docker rmi image

4. Verify
that
the tomcat page appears when visiting ip:8020


5. Debug the dockerfile
to enter the container, and check whether the operation in the dockerfile takes effect in the container