docker-- JAVA deployment environment and tomcat

Do not use docker deployment

Java environment configuration

The server is not configured java environment

Ready jdk and tomcat installation package

Extract the apache-tomcat-8.5.35.tar.gz

tar -xf apache-tomcat-8.5.35.tar.gz

Extracting jdk-8u211-linux-x64.tar.gz and moved to the / usr / local / under, rename jdk8

Decompression: tar -xf the JDK-8u211-linux- x64.tar.gz
Mobile:. Music Videos jdk1 8.0_211 / / usr / local / jdk8

Configuring environment variables jdk

vi / etc / profile is written in the rearmost file the following, the first line is the location of your JDK, you need to change, need to change back

export JAVA_HOME=/usr/local/jdk8
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

The environmental variables and verification

source /etc/profile

Start tomcat

Start tomcat is very simple, just unzip and into the bin directory, execute it startup.sh

The default port tomcat 8080 port, access, see the following page configuration is successful

Such is the background to start up tomcat, we can also start in the foreground

[root@WC bin]# ./catalina.sh run

需要加run参数

如果访问不了请检查防火墙

docker启动

在apache和jdk同级的目录下创建dockerfile文件，内容如下

FROM centos:7
ADD jdk-8u211-linux-x64.tar.gz /usr/local
RUN mv /usr/local/jdk1.8.0_211 /usr/local/jdk8
ENV JAVA_HOME=/usr/local/jdk8
ENV JRE_HOME=$JAVA_HOME/jre
ENV CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
ENV PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
ADD apache-tomcat-8.5.35.tar.gz /usr/local
RUN mv /usr/local/apache-tomcat-8.5.35 /usr/local/tomcat
EXPOSE 8080
ENTRYPOINT ["/usr/local/tomcat/bin/catalina.sh","run"]

代码解释：

ADD jdk-8u211-linux-x64.tar.gz /usr/local 将本地的jdk复制到容器内部并解压

RUN mv /usr/local/jdk1.8.0_211 /usr/local/jdk8 移动并重命名
后面的4个env是设置环境变量
EXPOSE 8080 暴露出8080端口
ENTRYPOINT ["/usr/local/tomcat/bin/catalina.sh","run"] 启动容器的时候执行，不能后台启动，要不然容器启动后就停止了

[root@WC ~]# docker build -t centos:java .

启动容器：

docker run -itd -p 8081:8080 -v /root/test/ROOT:/usr/local/tomcat/webapps/ROOT centos:java /bin/bash

然后我们访问8081端口就可以访问tomcat服务了