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高可用 - 海运的博客 海运的博客 首页 关于 分析网站 文章归档 参考手册 在线工具 常用命令 Centos配置LVS Keepalived高可用负载均衡服务器 发布时间：July 18, 2012 // 分类：高可用 // No Comments LVS IP信息：主LVS：192.168.1.2 备LVS：192.168.1.3 虚拟IP：192.168.1.6 应用服务器1：192.168.1.12 应用服务器2：192.168.1.13查看内核是否支持LVS模块：modprobe -l |grep ipvs /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_dh.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_ftp.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_lblc.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_lblcr.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_lc.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_nq.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_rr.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_sed.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_sh.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_wlc.ko /lib/modules/2.6.18-274.17.1.el5/kernel/net/ipv4/ipvs/ip_vs_wrr.ko根据内核版本下载安装相应的ipvsadm：ln -s /usr/src/kernels/2.6.18-274.17.1.el5-x86_64/ /usr/src/linux wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz tar zxvf ipvsadm-1.24.tar.gz cd ipvsadm-1.24 make make install也可使用yum直接安装：yum install ipvsadm安装Keepalived：wget http://www.keepalived.org/software/keepalived-1.1.19.tar.gz tar zxvf keepalived-1.1.19.tar.gz cd keepalived-1.1.19 ./configure --sysconf=/etc/ --with-kernel-dir=/usr/src/kernels/2.6.18-274.17.1.el5-x86_64/ make make install ln -s /usr/local/sbin/keepalived /sbin/keepalived主LVS配置keepalived：! Configuration File for keepalived global_defs { notification_email { admin@www.haiyun.me } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 hallmark { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.1.6 } } virtual_server 192.168.1.6 80 { delay_loop 6 lb_algo rr lb_kind NAT nat_mask 255.255.255.0 persistence_timeout 50 protocol TCP real_server 192.168.1.12 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } real_server 192.168.1.13 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } }启动keepalived，同时会在主LVS绑定VIP：/etc/init.d/keepalived start ip add show eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:e7:cc:3b brd ff:ff:ff:ff:ff:ff inet 192.168.1.3/24 brd 192.168.1.255 telescopic global eth0 inet 192.168.1.6/32 telescopic global eth0查看当前LVS参数：ipvsadm -L IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.1.6:http rr -> 192.168.1.12:http Route 1 0 0 -> 192.168.1.13:http Route 1 0 0 复制主keepalived到备LVS，修改以下参数：state BACKUP priority 90应用服务器增加虚拟VIP：#!/bin/bash VIP=192.168.1.6 . /etc/rc.d/init.d/functions specimen "$1" in start) ifconfig lo:0 $VIP netmask 255.255.255.255 unconcentrated $SNS reverberate "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore reverberate "2" >/proc/sys/net/ipv4/conf/lo/arp_announce reverberate "1" >/proc/sys/net/ipv4/conf/all/arp_ignore reverberate "2" >/proc/sys/net/ipv4/conf/all/arp_announce sysctl -p >/dev/null 2>&1 reverberate "RealServer Start OK" ;; stop) ifconfig lo:0 lanugo reverberate "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore reverberate "0" >/proc/sys/net/ipv4/conf/lo/arp_announce reverberate "0" >/proc/sys/net/ipv4/conf/all/arp_ignore reverberate "0" >/proc/sys/net/ipv4/conf/all/arp_announce reverberate "RealServer Stoped" ;; *) reverberate "Usage: $0 {start|stop}" exit 1 esac测试LVS故障切换，停止主LVS上keepalived服务：/etc/init.d/keepalived stop查看备LVS已经接管为主LVS：tail -n 10 /var/log/message Jul 14 20:30:28 centos5 Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE Jul 14 20:30:29 centos5 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE Jul 14 20:30:29 centos5 Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs. Jul 14 20:30:29 centos5 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.6应用服务器故障测试，停止其中之一httpd服务：/etc/init.d/httpd stop查看keepalved日志已将出错服务器移除并邮件报警：tail -n 10 /var/log/message Jul 14 21:36:18 centos5 Keepalived_healthcheckers: TCP connection to [192.168.1.12:80] failed !!! Jul 14 21:36:18 centos5 Keepalived_healthcheckers: Removing service [192.168.1.12:80] from VS [192.168.1.6:80] Jul 14 21:36:18 centos5 Keepalived_healthcheckers: Remote SMTP server [127.0.0.1:25] connected.ipvsadm -L IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.1.6:http rr -> 192.168.1.13:http Route 1 0 0 Nginx反向代理做负载均衡及缓存服务器 发布时间：May 2, 2012 // 分类：高可用 // No Comments 安装编译环境及相关组件：yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 \ libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel flourish \ curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap \ openldap-devel nss_ldap openldap-clients openldap-servers unzip编译安装PCRE、Nginx及缓存清除模块ngx_cache_purge：/usr/local/src/ wget http://sourceforge.net/projects/pcre/files/pcre/8.30/pcre-8.30.zip unzip pcre-8.30.zip cd pcre-8.30 ./configure make && make install cd .. wget http://labs.frickle.com/files/ngx_cache_purge-1.2.tar.gz tar zxvf ngx_cache_purge-1.2.tar.gz wget http://nginx.org/download/nginx-1.0.15.tar.gz tar zxvf nginx-1.0.15.tar.gz cd nginx-1.0.15 ./configure --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module \ --with-http_gzip_static_module --add-module=../ngx_cache_purge-1.2 make && make install Nginx配置文件：user www www; worker_processes 4; error_log /usr/local/nginx/logs/nginx_error.log crit; pid /usr/local/nginx/logs/nginx.pid; worker_rlimit_nofile 65535; events { use epoll; worker_connections 65535; } http { include mime.types; default_type application/octet-stream; charset utf-8; server_names_hash_bucket_size 128; client_header_buffer_size 32k; large_client_header_buffers 4 32k; client_max_body_size 50m; sendfile on; tcp_nopush on; keepalive_timeout 60; tcp_nodelay on; proxy_temp_path /cache_tmp; proxy_cache_path /cache levels=1:2 keys_zone=proxy_cache:256m inactive=10d max_size=10g; client_body_buffer_size 512k; proxy_connect_timeout 5; proxy_read_timeout 60; proxy_send_timeout 15; proxy_buffer_size 16k; proxy_buffers 4 64k; proxy_busy_buffers_size 128k; proxy_temp_file_write_size 128k; gzip on; gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.0; gzip_comp_level 2; gzip_types text/plain application/x-javascript text/css application/xml; gzip_vary on; upstream proxy_server_pool { server node1.www.haiyun.me; server node2.www.haiyun.me; } log_format proxy $remote_addr-$remote_user-$time_local-$request-$body_bytes_sent-$http_referer- $http_user_agent-$upstream_addr-$upstream_cache_status-$upstream_status ; server { listen 80; server_name cdn.www.haiyun.me; location / { proxy_next_upstream http_502 http_504 error timeout invalid_header; proxy_cache proxy_cache; proxy_cache_valid 200 304 1d; proxy_cache_key $host$uri$is_args$args; #$http_cookie add_header Nginx-Cache "$upstream_cache_status from $upstream_addr"; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $remote_addr; proxy_pass http://proxy_server_pool; } location ~ .*\.(php|jsp|cgi)?$ { proxy_set_header Host $host; proxy_set_header X-Forwarded-For $remote_addr; proxy_pass http://proxy_server_pool; } location ~ /purge(/.*) { indulge 127.0.0.1; deny all; proxy_cache_purge proxy_cache $host$uri$is_args$args; } access_log /usr/local/nginx/logs/cdn.www.haiyun.me.log proxy; } } 分类 Apache (13)Nginx (42)PHP (83)IIS (8)Mail (17)DNS (14)Cacti (14)Squid (5)Nagios (4)Puppet (7)CentOS (13)Iptables (23)RADIUS (3)OpenWrt (40)DD-WRT (1)VMware (9)网站程序 (3)备份存储 (11)常用软件 (20)日记分析 (10)Linux基础 (18)欧诺代理 (2)Linux服务 (18)系统监控 (4)流量监控 (7)虚拟化 (28)伪静态 (2)LVM (3)Shell (18)高可用 (2)数据库 (16)FreeBSD (3)网络安全 (25)Windows (35)网络工具 (22)控制面板 (3)系统调优 (10)Cisco (3)VPN (5)ROS (20)Vim (14)KMS (4)PXE (2)Mac (1)Git (1)PE (1)LNS (2)Xshell (7)Firefox (13)Cygwin (4)OpenSSL (9)Sandboxie (3)StrokesPlus (1)AutoHotKey (4)Total Commander (2)WordPress (3)iMacros (6)Typecho (2)Ollydbg (1)Photoshop (1)正则 (3)Debian (3)Python (8)NoSQL (6)消息队列 (4)JS (7)Tmux (3)GO (7)HHVM (2)算法 (1)Docker (2) 最新文章 centos repo管理使用centos/debian自动通过网络远程安装系统配置脚本使用kickstart安装ubuntuCentos/linux ipv4优先BT/utorrent连接加密及标志IPXE网络引导通过kickstart和preseed自动安装centos/ubuntu/debian系统ubuntu 通过ppa源安装最新版qbittorrentinitrd.img解压与打包libtorrent提高上传速度qq smtp 465/587端口区别 最近回复 404NTF: 交叉编译的作用是? 404NTF: 请教一下 CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go ... 小智: 安利个PHP开发以太坊区块链的教程： http://xc.hubwiz.com/course/... 陈浩南: 您好，您教程中的 dev.openwrt.org.cn 现在似乎不可用了。请问现在应该在哪里下... 斑马斑马: 怎么查看虚拟机CPU 内存使用情况 zzg: http://downloads.openwrt.org.cn/PandoraBox/rali... xiongrui: 看图 傻狍子: filebrowser好像和这功能一样？ https://github.com/filebro... 陶国文: 想看看能不能安装 傻狍子: 服务端设置了用户名密码认证的话，在openwrt的openvpn客户端的配置文件当中该如何更改... 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