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

雨点打透心脏的1/2处 2022-05-24 12:14 208阅读 0赞

**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

![20180527121208925][]

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:

<?xml version="1.0" encoding="UTF-8"?>
    
    
    <Server port="8005" shutdown="SHUTDOWN">
      <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
      
      
      <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
      
      <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
      <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
      <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
    
      
      <GlobalNamingResources>
        
        <Resource name="UserDatabase" auth="Container"
                  type="org.apache.catalina.UserDatabase"
                  description="User database that can be updated and saved"
                  factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
                  pathname="conf/tomcat-users.xml" />
      </GlobalNamingResources>
    
      
      <Service name="Catalina">
    
        
        
    
    
        
        <Connector port="8080" protocol="HTTP/1.1"
                   connectionTimeout="20000"
                   redirectPort="8443" />
        
        
        
        
        
        
    
        
        <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
    
    
        
    
        
        <Engine name="Catalina" defaultHost="localhost">
    
          
          
    
          
          <Realm className="org.apache.catalina.realm.LockOutRealm">
            
            <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                   resourceName="UserDatabase"/>
          </Realm>
    
          <Host name="localhost"  appBase="webapps"
                unpackWARs="true" autoDeploy="true">
    
            
            
    
            
            <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
                   prefix="localhost_access_log" suffix=".txt"
                   pattern="%h %l %u %t "%r" %s %b" />
    
          </Host>
        </Engine>
      </Service>
    </Server>

**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"%>  
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
    <html>  
    <head>  
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">  
    <title>Nginx+Tomcat负载均衡</title>  
    </head>  
    <body>  
         <%  
             InetAddress addr = InetAddress.getLocalHost();  
             out.println("主机地址："+addr.getHostAddress());  
             out.println("主机名："+addr.getHostName());   
          %>  
    </body>  
    </html>

然后在compose目录下启动docker

docker-compose up

![20180527121329924][]

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/

![20180527121542580][]

![20180527121712183][]

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

[20180527121208925]: /images/20220524/354d9128538a4097b171914f1ae88f4b.png
[20180527121329924]: /images/20220524/7a5bee1fd22d4066983c9fa11824f59c.png
[20180527121542580]: /images/20220524/7567b3a6b1e54b46b64332110ed9c749.png
[20180527121712183]: /images/20220524/d6f4db4d811d4311b2294294bd797f73.png