Docker(五)----Docker-Compose部署nginx代理Tomcat集群

1.前言

使用Docker镜像部署Nginx代理的多个Tomcat集群

目录结构如下:

docker-compose.yml
etc
└── localtime      #文件
mysql
├── conf          #目录
│   └── my.cnf    #文件
└── mysqldb       #目录
nginx
├── conf.d        #目录
│   └── test.conf #文件
├── Dockerfile    #文件
├── logs          #目录
└── nginx.conf    #文件
tomcat
├── Dockerfile    #文件
└── server.xml    #文件
webapps
 
# webapps 用于放置tomcat项目使用
# mysqldb 数据将会存放在 mysql/mysqldb中

my.cnf文件如下：

[client]
port = 3306
socket = /var/lib/mysql/mysql.sock
default-character-set = utf8
[mysql]
port = 3306
socket = /var/lib/mysql/mysql.sock
default-character-set = utf8
[mysqld]
port = 3306
basedir = /var/lib/mysql
datadir = /var/lib/mysql
socket = /var/lib/mysql/mysql.sock
character-set-server = utf8
skip-external-locking
slow-query-log = on
long_query_time = 1
slow_query_log_file = /var/lib/mysql/slow.log

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER

log-error=/var/lib/mysql/mysql.log
pid-file=/var/lib/mysql/mysql.pid

nginx.conf文件如下:

user  nginx;
worker_processes  1;

#error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    gzip  on;
    gzip_http_version 1.0;
    gzip_comp_level 6;
    gzip_proxied any;
    gzip_types text/plain  text/javascript application/x-javascript text/css  text/xml image/jpg  application/xml  image/jpeg image/gif image/png;
    gzip_vary on;
    gzip_disable        "Dalvik\.";
    gzip_disable "MSIE [1-6].(?!.*SV1)";

    include /usr/local/nginx/conf.d/*.conf;
}

test.conf文件如下:

upstream example {
   server tomcat01:8080;
   server tomcat02:8080;
   server tomcat03:8080;
}

server {
    listen  80;
    # listen  443 ssl;
    server_name  localhost;

    access_log  logs/test_access.log main;
    error_log   logs/test_error.log ;
    
    location / {
      proxy_pass http://example;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;  
    }
    
    location ~ \.(html|css|js|jpg|png|gif)$ {
       root /opt/webapps/ROOT;
    }
}

service.xml文件如下:

2.部署和构建

2.1、使用Dockerfile构建nginx镜像

FROM centos:centos7
MAINTAINER fendo
RUN yum -y install pcre-devel openssl-devel net-tools gcc gcc-c++ zlib zlib-devel \
    make openssl
ADD http://nginx.org/download/nginx-1.14.0.tar.gz /tmp/
WORKDIR  /tmp
RUN tar -zxvf nginx-1.14.0.tar.gz
RUN cd /tmp/nginx-1.14.0 \
    && ./configure --prefix=/usr/local/nginx \
     --with-http_ssl_module \
     --with-http_gzip_static_module \
     --with-http_realip_module \
    && make && make install
RUN mkdir -p /usr/local/nginx/logs \
    && groupadd -g 1001 nginx \
    && useradd -g 1001 -u 1001 -s /sbin/nologin -M nginx

CMD ["/usr/local/nginx/sbin/nginx", "-g", "daemon off;"]

2.2、使用Dockerfile构建tomcat镜像

FROM centos:centos7
MAINTAINER fendo

RUN yum install -y wget

RUN wget -P /usr/local  https://mirrors.cnnic.cn/apache/tomcat/tomcat-8/v8.0.52/bin/apache-tomcat-8.0.52.tar.gz
RUN wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" -P /usr/local "http://download.oracle.com/otn-pub/java/jdk/8u171-b11/512cd62ec5174c3487ac17c61aaa89e8/jdk-8u171-linux-x64.tar.gz"

WORKDIR  /usr/local
RUN mv jdk-8u171-linux-x64.tar.gz jdk-8u171-linux-x64.tar
RUN mv apache-tomcat-8.0.52.tar.gz apache-tomcat-8.0.52.tar
RUN tar -zxvf apache-tomcat-8.0.52.tar
RUN tar -zxvf jdk-8u171-linux-x64.tar
COPY server.xml /usr/local/apache-tomcat-8.0.52/conf/server.xml

#设置环境变量
ENV JAVA_HOME /usr/local/jdk1.8.0_171
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENV CATALINA_HOME /usr/local/apache-tomcat-8.0.52
ENV PATH $PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin

EXPOSE 8080
ENTRYPOINT ["/usr/local/apache-tomcat-8.0.52/bin/catalina.sh", "run"]
#ENTRYPOINT /usr/local/apache-tomcat-8.0.52/bin/startup.sh && tail -f /usr/local/apache-tomcat-8.0.52/logs/catalina.out

2.3、mysql镜像使用docker hub 镜像

2.4、docker-compose.yml文件

version: '3'
services:
  # web-server  
  nginx:
    build:
      context: ./nginx
      dockerfile: Dockerfile
    ports:
      - "80:80"
      - "443:443"
    links:
      - tomcat01:tomcat01
      - tomcat02:tomcat02
      - tomcat03:tomcat03
    volumes:
      - ./webapps:/opt/webapps
      - ./nginx/logs:/usr/local/nginx/logs
      - ./etc/localtime:/etc/localtime
      - ./nginx/nginx.conf:/usr/local/nginx/conf/nginx.conf:ro
      - ./nginx/conf.d/:/usr/local/nginx/conf.d/:ro
    depends_on:
      - mysql
      - tomcat01
      - tomcat02
      - tomcat03
  # tomcat
  tomcat01:
    hostname: tomcat01
    build: ./tomcat
    links:
      -  mysql:mysql
    volumes:
      - ./webapps:/usr/local/apache-tomcat-8.0.52/webapps
      - ./etc/localtime:/etc/localtime

  tomcat02:
    hostname: tomcat02
    build: ./tomcat
    links:
      -  mysql:mysql
    volumes:
      - ./webapps:/usr/local/apache-tomcat-8.0.52/webapps
      - ./etc/localtime:/etc/localtime

  tomcat03:
    hostname: tomcat03
    build: ./tomcat
    links:
      -  mysql:mysql
    volumes:
      - ./webapps:/usr/local/apache-tomcat-8.0.52/webapps
      - ./etc/localtime:/etc/localtime

  # mysql
  mysql:
    hostname: mysql
    image: mysql:latest
    ports:
     - "3307:3306"
    volumes:
      - ./mysql/conf/my.cnf:/etc/mysql/conf.d/my.cnf
      - ./mysql/mysqldb:/var/lib/mysql
      - ./etc/localtime:/etc/localtime:ro
    environment:
      - MYSQL_ROOT_PASSWORD=root

3.测试项目

在webapps目录下创建index.jsp文件，内容如下:

<%@ page language="java" contentType="text/html; charset=utf-8"  import="java.net.InetAddress"  
    pageEncoding="utf-8"%>  
  
  
  
  
  
  
  
     <%  
         InetAddress addr = InetAddress.getLocalHost();  
         out.println("主机地址："+addr.getHostAddress());  
         out.println("主机名："+addr.getHostName());   
      %>  
  
 

然后在compose目录下启动docker

docker-compose up

如果出现以上提示说明启动成功，查看启动状态

[root@swarm01 compose]# docker-compose ps
       Name                     Command               State                     Ports                  
-------------------------------------------------------------------------------------------------------
compose_mysql_1      docker-entrypoint.sh mysqld      Exit 1                                           
compose_nginx_1      /usr/local/nginx/sbin/ngin ...   Up       0.0.0.0:443->443/tcp, 0.0.0.0:80->80/tcp
compose_tomcat01_1   /bin/sh -c /usr/local/apac ...   Up       8080/tcp                                
compose_tomcat02_1   /bin/sh -c /usr/local/apac ...   Up       8080/tcp                                
compose_tomcat03_1   /bin/sh -c /usr/local/apac ...   Up       8080/tcp                                
[root@swarm01 compose]# 

然后访问http://192.168.182.110/

每次访问的主机名都不一样说明负载均衡成功!!!

完整示例: https://download.csdn.net/download/u011781521/10440466

参考:https://www.cnblogs.com/bigberg/p/8516026.html