How to deploy a Java web application using Docker

docker deploys java web system

1. Create a path test/app in the root directory mkdir test && cd test&& mkdir app &&cd app

2. Change apache-tomcat-7.0. 29. Copy tar.gz and jdk-7u25-linux-x64.tar.gz to the app directory

3. Decompress the two tar.gz files

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

4. Copy the decompressed Rename the file

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

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

touch dockerfile

6.Dockerfile document content and annotations

------ -----------------------dockerfile content------------------------- ---------

 #使用ubuntu:14.04作为基础镜像
 from ubuntu:14.04
#指定镜像创建者信息
 maintainer test xxxx@xxx.com
#创建日期
 env refreshed_at 2017-2-15
#切换镜像目录，进入/usr目录
 workdir /usr
#在/usr/下创建jdk目录,用来存放jdk文件
 run mkdir jdk
#在/usr/下创建tomcat目录，用来存放tomcat
 run mkdir tomcat
#切换镜像的目录至/usr/jdk
 workdir /usr/jdk/

#将宿主机的jdk目录下的文件拷至镜像的/usr/jdk目录下
 add jdk /usr/jdk
#切换镜像的目录至/usr/tomcat
 workdir /usr/tomcat
#将宿主机的tomcat目录下的文件拷至镜像的/usr/tomcat目录下
 add tomcat /usr/tomcat
#设置环境变量
 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
#切换工作目录到root下
 workdir /usr/tomcat/webapps/root
#删除tomcat默认的项目文件
 run rm -rf *
#将自己的xxx.war系统添加到docker镜像中tomcat下的root目录下
 add webapp /usr/tomcat/webapps/xxx.war
#公布tomcat的8080端口
 expose 8080
#启动tomcat
 entrypoint ["../../bin/catalina.sh","run"]

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

7. Create the image through dockerfile

Command:

docker build -t 镜像名称:标签 dockerfile位置
docker build -t tms:1.0 . （.代表当前目录)

8. At this point, just put java web The system is made into an image and verified through docker images

9. Start a docker container by just building the image

Command: docker run -d -p host mapped port: container exposed port --name container name Image name/image id

-d Parameter: Backend startup mode

-p Parameter: Mapping of host port and container port

-- name parameter: Give the container an alias

docker run -d -p 8081:8080 --name 容器名称 镜像name:镜像tag

10. Verify through docker ps -a

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