构建 JDK1.7 + Tomcat8 Docker 镜像

Tomcat 本身是有现成的官方镜像的。

Docker Hub

可惜最低支持到openJDK1.8，项目需要1.7的，所以需要自己来构建使用 openJDK1.7 的镜像。

Dockerfile

FROM centos:latest

RUN mkdir -p /usr/local/java/jdk1.7
RUN mkdir -p /usr/local/tomcat

ADD jdk1.7.0_80 /usr/local/java/jdk1.7
ADD apache-tomcat-8.5.42 /usr/local/tomcat

ENV JAVA_HOME /usr/local/java/jdk1.7
ENV CATALINA_HOME /usr/local/tomcat
ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/bin

EXPOSE 8080

CMD ["/usr/local/tomcat/bin/catalina.sh", "run"]

下载好jdk1.7和tomcat8的安装包，并放到和Dockerfile同一目录下，建新镜像执行

wget https://files-cdn.liferay.com/mirrors/download.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-x64.tar.gz
wget http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.42/bin/apache-tomcat-8.5.42.tar.gz
tar -zxvf jdk-7u80-linux-x64.tar.gz
tar -zxvf apache-tomcat-8.5.42.tar.gz
docker build -t colbrze430/jdk7-tomcat8 .

使用 docker-compose.yml

version: "3.4"

services:
  web1:
    image: colbrze430/jdk7-tomcat8
    ports:
      - "8080:8080"
    restart: always
    environment:
      - TZ=Asia/Shanghai
    volumes:
      - $PWD/lantin:/usr/local/tomcat/webapps/ROOT  # 项目目录
      - $PWD/catalina.sh:/usr/local/tomcat/bin/catalina.sh
      - $PWD/logs1:/lantin

  web2:
    image: colbrze430/jdk7-tomcat8
    ports:
      - "8081:8080"
    restart: always
    environment:
      - TZ=Asia/Shanghai
    volumes:
      - $PWD/lantin:/usr/local/tomcat/webapps/ROOT  # 项目目录
      - $PWD/catalina.sh:/usr/local/tomcat/bin/catalina.sh
      - $PWD/logs2:/lantin

tomcat 的相关配置可以通过修改 catalina.sh 文件来配置。

热更新脚本 update.sh :

#!/bin/bash
set -e
if [ ! -f lantin.zip ]; then
    echo "未找到 lantin.zip 文件, 请将文件放到 $(pwd) 下"
    exit -1
fi

unzip -o lantin.zip

docker-compose restart web1
start=$(date "+%s")
while [ $(curl -I -m 3 -o /dev/null -s -w %{http_code}  127.0.0.1:8080) == 000 ]
do
    now=$(date "+%s")
    echo -en "\r等待 web1 重启..." $((now-start))
    sleep 1
done
echo -e "\nweb1 已启动\n"
docker-compose restart web2
start=$(date "+%s")
while [ $(curl -I -m 3 -o /dev/null -s -w %{http_code}  127.0.0.1:8081) == 000 ]
do
    now=$(date "+%s")
    echo -en "\r等待 web2 重启..." $((now-start))
    sleep 1;
done
echo -e "\nweb2 已启动\n"

rm -f lantin.zip

包含了解压和重启。

参考

构建自己的centos+jdk7+tomcat8的docker镜像 - qn0007的博客 - CSDN博客