Nginx+Tomcat+Keepalived實現高可用web集群
阿新 • • 發佈：2018-05-01
Nginx Keepadlived Tomcat Nginx+Tomcat+Keepalived實現高可用web集群：
環境：CenOS 6.5
Nginx-Master：10.10.10.128
Nginx-Backup：10.10.10.129
Tomcat1：10.10.10.130
Tomcat2：10.10.10.131
VIP：10.10.10.100
一、環境基礎配置
1、更換國內yum源
2、關閉防火墻、SELinux
3、時間同步
二、Web端安裝Web服務
1、查看是否安裝JDK [root@Tomcat1 ~]# java -version java version "1.8.0_171" Java(TM) SE Runtime Environment (build 1.8.0_171-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode) 2、安裝JDK 官網下載二進制包 解壓到/usr/local/java tar zxvf jdk-8u171-linux-x64.tar.gz -C /usr/local/java/ 修改環境變量/etc/profile JAVA_HOME=/usr/local/java PATH=$JAVA_HOME/bin:$PATH CLASSPATH=$JAVA_HOME/jre/lib/ext:$JAVA_HOME/lib/tools.jar export PATH JAVA_HOME CLASSPATH 使環境變量生效： source /etc/profile 3、下載Tomcat源碼包： wget -O /opt/apache-tomcat-9.0.7.tar.gz http://mirrors.hust.edu.cn/apache/tomcat/tomcat-9/v9.0.7/bin/apache-tomcat-9.0.7.tar.gz 4、解壓到/usr/local/tomcat tar zxvf /opt/apache-tomcat-9.0.7.tar.gz -C /usr/local/ 5、修改Tomcat的主頁 rm -rf /usr/local/apache-tomcat-9.0.7/webapps/ROOT/* echo "Tomcat1" >/usr/local/apache-tomcat-9.0.7/webapps/ROOT/index.html #Tomcat1 echo "Tomcat2" >/usr/local/apache-tomcat-9.0.7/webapps/ROOT/index.html #Tomcat2 6、測試Tomcat能否正常啟動 [root@Tomcat1 bin]# ./usr/local/apache-tomcat-9.0.7/bin /startup.sh Using CATALINA_BASE: /usr/local/apache-tomcat-9.0.7 Using CATALINA_HOME: /usr/local/apache-tomcat-9.0.7 Using CATALINA_TMPDIR: /usr/local/apache-tomcat-9.0.7/temp Using JRE_HOME: /usr/local/java Using CLASSPATH: /usr/local/apache-tomcat-9.0.7/bin/bootstrap.jar:/usr/local/apache-tomcat-9.0.7/bin/tomcat-juli.jar Tomcat started. curl 10.10.10.130:8080 #返回Tomcat1 curl 10.10.10.131:8080 #返回Tomcat2 至此web端配置完成。
二、Nginx反向代理安裝
1、安裝依賴軟件 yum install -y gcc gcc-c++ yum install -y pcre pcre-devel openssl openssl-devel zlib zlib-devel 2、官網下載源碼包 3、解壓源碼包 tar zxvf nginx-1.14.0.tar.gz -C /tmp/ 4、編譯安裝 useradd -s /bin/false -M nginx ./configure --user=nginx --group=nginx --prefix=/usr/local/nginx-1.14.0/ --with-http_v2_module --with-http_ssl_module --with-http_sub_module --with-http_stub_status_module --with-http_gzip_static_module --with-pcre make && make install 5、配置反向代理/usr/local/nginx/conf/nginx.conf worker_processes 1; pid /usr/local/nginx/logs/nginx.pid; worker_rlimit_nofile 51200; events { use epoll; worker_connections 51200; } http { include mime.types; default_type application/octet-stream; server_names_hash_bucket_size 128; client_header_buffer_size 32k; large_client_header_buffers 4 32k; client_max_body_size 8m; sendfile on; tcp_nopush on; keepalive_timeout 65; tcp_nodelay on; gzip on; gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.0; gzip_comp_level 2; gzip_types test/plain application/x-javascript test/css application/xml; gzip_vary on; upstream backend { server 10.10.10.130:8080; server 10.10.10.131:8080; } server { listen 80; server_name 10.10.10.128; #Nginx2改為：10.10.10.129 location / { root /var/www/html; index index.php index.html index.htm; proxy_pass http://backend; } } } 先測試再啟動： [root@Nginx1 ~]# /usr/local/nginx-1.14.0/sbin/nginx -t nginx: the configuration file /usr/local/nginx-1.14.0//conf/nginx.conf syntax is ok nginx: configuration file /usr/local/nginx-1.14.0//conf/nginx.conf test is successful [root@Nginx1 ~]# /usr/local/nginx-1.14.0/sbin/nginx [root@Nginx1 ~]# lsof -i:80 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME nginx 4896 root 6u IPv4 18439 0t0 TCP *:http (LISTEN) nginx 4897 nginx 6u IPv4 18439 0t0 TCP *:http (LISTEN) curl 10.10.10.128 #輪詢返回Tomcat1 Tomcat2 Nginx2同樣的搭建。 至此Nginx反向代理搭建完成。
三、使用Keepalived實現高可用
1、安裝： yum install keepalived -y 2、修改配置文件/etc/keepalived/keepalived.conf MASTER 端： ! Configuration File for keepalived vrrp_script check_nginx { script "/etc/keepalived/check_nginx.sh" interval 2 weight 2 } global_defs { notification_email { [email protected] [email protected] [email protected] } notification_email_from [email protected] smtp_server 192.168.200.1 smtp_connect_timeout 30 router_id LVS_DEVEL1 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 10.10.10.100/24 dev eth0 } track_script { check_nginx } } BACKUP端： 修改： router_id LVS_DEVEL2 state BACKUP priority 90 檢測Nginx腳本： #!/bin/bash nginxpid=`ps -C nginx --no-header | wc -l` if [ $nginxpid -eq 0 ];then /etc/init.d/keepalived stop fi chmod +x /etc/keepalived/check_nginx.sh 重啟Keepalived服務 service keepalived restart
四、檢驗服務的高可用
Nginx1執行：killall nginx
發現 web訪問依然正常
Tomcat1執行：/usr/local/apache-tomcat-9.0.7/bin/shutdown.sh
發現 web訪問依然正常
高可用的環境搭建完畢。Nginx+Tomcat+Keepalived實現高可用web集群