Docker Learning Notes: Deploying Java Web System with Docker

Docker deployment of Java Web system

　1.In the root directory, create a path test/.In the root directory, create a path test

2.Copy apache-tomcat-7.0.29.tar.gz and jdk-7u25-linux-x64.tar.gz copy to the app directory

3.Unzip two tar.gz files

tar -zxvf apache-tomcat-7.0.29.tar.gz tar -zxvf jdk-7u25-linux-x64.tar.gz

4.Rename the unpacked files

mv apache-tomcat-7.0.29 tomcat mv jdk-7u25-linux-x64 jdk

5.In the app directory, create a Dockerfile file to create the image

touch Dockerfile

6.Dockerfile document content and annotations

-----------------------------Dockerfile content----------------------------------

 # Use ubuntu:14.04As the base image
 FROM ubuntu:14.04
# Specify the information of the image creator
 MAINTAINER test [email protected]
# Creation date
 ENV REFRESHED_AT 2017-2-15
# Change the image directory, enter/usr directory
 WORKDIR /usr
# In/usr/Create a jdk directory below to store jdk files
 RUN mkdir jdk
# In/usr/Create a tomcat directory below to store tomcat
 RUN mkdir tomcat
# Change the directory of the image to/usr/jdk
 WORKDIR /usr/jdk/
# Copy files from the host's jdk directory to the image/usr/In the jdk directory
 ADD jdk /usr/jdk
# Change the directory of the image to/usr/tomcat
 WORKDIR /usr/tomcat
# Copy files from the host's tomcat directory to the image/usr/In the tomcat directory
 ADD tomcat /usr/tomcat
# Set environment variables
 ENV JAVA_HOME=/usr/jdk
 ENV JAVA_BIN=/usr/jdk/bin
 ENV PATH=$PATH:$JAVA_HOME/bin
 ENV CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
#Switch the working directory to ROOT
 WORKDIR /usr/tomcat/webapps/ROOT
#Delete the default project files of tomcat
 RUN rm -rf *
#Add your xxx.war system to the ROOT directory under tomcat in the docker image
 ADD webapp /usr/tomcat/webapps/xxx.war
#Announce the port of tomcat8080 Port
 EXPOSE 8080
#Start tomcat
 ENTRYPOINT ["../../bin/catalina.sh","run"]

---------------------------------------------------------------------------------

7.Create an image through Dockerfile

Command:　　

docker build -t Image Name: Tag Dockerfile Location
docker build -t tms:1.0 . (. represents the current directory)

8.Thus, the Java Web system is made into an image, and verified through docker images

9.Through the newly built image to start a Docker container

Command: docker run -d -p Host Machine Mapped Port: Container Exposed Port --name Container Name Image Name/Image ID

-d Parameter: Backend startup mode

-p Parameter: Mapping of host machine port to container port

--name Parameter: Give the container a different name

docker run -d -p 8081:8080 --name Container Name Image Name name: Image Tag

10.Through docker ps -a to verify

That's all for this article. Hope it will be helpful to your study, and also hope everyone will support the Yelling Tutorial.

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