keepalive +nginx （主从），keepalivenginx
keepalive +nginx （主从），keepalivenginx
环境：cenos7 keepalive1.3.8 nginx1.12.2
vip 172.18.203.101 master机器 nginx1:外网172.18.203.172 内网 172.18.1.172 slave机器 nginx2：外网172.18.203.173 内网 172.18.1.173
keepalive master 配置文件
[root@keepalive ~]# cat /etc/keepalived/keepalived.conf ! Configuration File for keepalived #全局定义 global_defs { notification_email { xiaofeng@sunspeedy.com } notification_email_from xiaofeng@sunspeedy.com smtp_server smtp.exmail.qq.com smtp_connect_timeout 30 router_id master-node } vrrp_script chk_http_port { script "/opt/chk_nginx.sh" interval 2 weight -5 fall 2 rise 1 } vrrp_instance VI_1 { state MASTER interface ens192 mcast_src_ip 172.18.203.172
unicast_peer {
172.18.203.173 ##（对端IP地址）此地址一定不能忘记,vrrp need use
}
virtual_router_id 51 priority 101 advert_int 1 authentication { auth_type PASS #设置vrrp验证类型，主要有PASS和AH两种 auth_pass 1111 } virtual_ipaddress { #VRRP HA 虚拟地址 如果有多个VIP，继续换行填写 172.18.203.101 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault" track_script { chk_http_port } }
nginx配置
[root@keepalive ~]# cat /usr/local/nginx/conf/nginx.conf user nginx; worker_processes 2; #error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info; #pid logs/nginx.pid; events { worker_connections 65535; } http { include mime.types; default_type application/octet-stream; charset utf-8; ###### ## set access log format ###### log_format main '$http_x_forwarded_for $remote_addr $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_cookie" $host $request_time'; ####### ## http setting ####### sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; proxy_cache_path /var/www/cache levels=1:2 keys_zone=mycache:20m max_size=2048m inactive=60m; proxy_temp_path /var/www/cache/tmp; fastcgi_connect_timeout 3000; fastcgi_send_timeout 3000; fastcgi_read_timeout 3000; fastcgi_buffer_size 256k; fastcgi_buffers 8 256k; fastcgi_busy_buffers_size 256k; fastcgi_temp_file_write_size 256k; fastcgi_intercept_errors on; # client_header_timeout 600s; client_body_timeout 600s; # client_max_body_size 50m; client_max_body_size 100m; #允许客户端请求的最大单个文件字节数 client_body_buffer_size 256k; #缓冲区代理缓冲请求的最大字节数，可以理解为先保存到本地再传给用户 gzip on; gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.1; gzip_comp_level 9; gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php; gzip_vary on; ## includes vhosts include vhosts/*.conf; }
[root@keepalive ~]# cat /usr/local/nginx/conf/vhosts/ntt52101.conf upstream LB-WWW { ip_hash; server 172.18.1.155:52101 max_fails=3 fail_timeout=30s; #max_fails = 3 为允许失败的次数，默认值为1 server 172.18.1.156:52101 max_fails=3 fail_timeout=30s; #fail_timeout = 30s 当max_fails次失败后，暂停将请求分发到该后端服务器的时间 } server { listen 52101; ######如果后端有多组web，需要将其域名解析到vip server_name 172.18.203.101; access_log /usr/local/nginx/logs/nttinterface_access.log main; error_log /usr/local/nginx/logs/nttinterface_error.log; location / { proxy_pass http://LB-WWW; proxy_redirect off ; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_connect_timeout 300; #跟后端服务器连接超时时间，发起握手等候响应时间 proxy_send_timeout 300; #后端服务器回传时间，就是在规定时间内后端服务器必须传完所有数据 proxy_read_timeout 600; #连接成功后等待后端服务器的响应时间，已经进入后端的排队之中等候处理 proxy_buffer_size 256k; #代理请求缓冲区,会保存用户的头信息以供nginx进行处理 proxy_buffers 4 256k; #同上，告诉nginx保存单个用几个buffer最大用多少空间 proxy_busy_buffers_size 256k; #如果系统很忙时候可以申请最大的proxy_buffers proxy_temp_file_write_size 256k; #proxy缓存临时文件的大小 proxy_next_upstream error timeout invalid_header http_500 http_503 http_404; proxy_max_temp_file_size 128m; proxy_cache mycache; proxy_cache_valid 200 302 60m; proxy_cache_valid 404 1m; } }
slave端
[root@keepalive src]# cat /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { xiaofeng@sunspeedy.com } notification_email_from xiaofeng@sunspeedy.com smtp_server smtp.exmail.qq.com smtp_connect_timeout 30 router_id slave-node } vrrp_script chk_http_port { script "/opt/chk_nginx.sh" interval 2 weight -5 fall 2 rise 1 } vrrp_instance VI_1 { state BACKUP interface ens192 mcast_src_ip 172.18.203.173
unicast_peer {
172.18.203.172 ##（对端IP地址）此地址一定不能忘记,vrrp need use
}
virtual_router_id 51 priority 99 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.18.203.101 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault" track_script { chk_http_port } }
ngixn检查
[root@keepalive src]# cat /opt/ chk_nginx.sh frp/ [root@keepalive src]# cat /opt/chk_nginx.sh #!/bin/bash counter=$(ps -C nginx --no-heading|wc -l) if [ "${counter}" = "0" ]; then /usr/local/nginx/sbin/nginx sleep 2 counter=$(ps -C nginx --no-heading|wc -l) if [ "${counter}" = "0" ]; then /etc/init.d/keepalived stop fi fi
发送邮件
[root@keepalive src]# cat /etc/keepalived/notify.sh #!/bin/bash # Author: MageEdu <linuxedu@foxmail.com> # description: An example of notify script # vip=172.18.203.101 contact='xiaofeng@sunspeedy.com' notify() { mailsubject="`hostname` to be $1: $vip floating" mailbody="`date '+%F %H:%M:%S'`: vrrp transition, `hostname` changed to be $1" echo $mailbody | mail -s "$mailsubject" $contact }
防火墙配置
1008 iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT 1009 iptables -A INPUT -p icmp -j ACCEPT 1010 iptables -A INPUT -i lo -j ACCEPT 1011 iptables -A INPUT -s 172.18.203.0/24 -d 224.0.0.18 -j ACCEPT 1012 iptables -A INPUT -s 172.18.1.0/24 -d 224.0.0.18 -j ACCEPT 1013 iptables -A INPUT -s 172.18.203.0/24 -p vrrp -j ACCEPT 1014 iptables -A INPUT -s 172.18.1.0/24 -p vrrp -j ACCEPT 1015 iptables -A INPUT -p tcp -m multiport --dport 80,22,52101,8123 -j ACCEPT 1016 iptables -A INPUT -j REJECT --reject-with icmp-host-prohibited 1017 iptables -A FORWARD -j REJECT --reject-with icmp-host-prohibited 1018 iptables-save 1019 history
防火墙配置
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT 1084 iptables -A INPUT -p icmp -j ACCEPT 1085 iptables -A INPUT -i lo -j ACCEPT 1086 iptables -A INPUT -d 172.18.203.101 -j ACCEPT 1087 iptables -A INPUT -s 172.18.203.0/24 -d 224.0.0.18 -j ACCEPT 1088 iptables -A INPUT -s 172.18.1.0/24 -d 224.0.0.18 -j ACCEPT 1089 iptables -A INPUT -s 172.18.203.0/24 -p vrrp -j ACCEPT 1090 iptables -A INPUT -s 172.18.1.0/24 -p vrrp -j ACCEPT 1091 iptables -A INPUT -p tcp -m multiport --dport 80,22,52101,8123 -j ACCEPT 1092 iptables -A INPUT -j REJECT --reject-with icmp-host-prohibited 1093 iptables -A FORWARD -j REJECT --reject-with icmp-host-prohibited 1094 iptables -L -n 1095 iptables-save
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