做摄影网站,网站制作怎么办,科技公司怎么取名字,黄骅网站建设价格目录 项目架构
一#xff0c;环境介绍
二#xff0c;项目部署
在Web服务器上配置Web测试页面
nginx负载均衡配置
配置Nginx_Master
通过vrrp_script实现对集群资源的监控#xff08;1通过killall命令探测服务运行状态#xff09;
通过vrrp_script实现对集群资源…目录 项目架构
一环境介绍
二项目部署
在Web服务器上配置Web测试页面
nginx负载均衡配置
配置Nginx_Master
通过vrrp_script实现对集群资源的监控1通过killall命令探测服务运行状态
通过vrrp_script实现对集群资源的监控2、开发检测nginx存活的shell脚本
三项目测试
四实现不抢占模式 项目架构
NginxKeepalived实现高可用
在 Keepalived Nginx 高可用负载均衡架构中keepalived 负责实现高可用。它是一个高性能的服务器高可用或者热备解决方案Keepalived主要来防止服务器单点故障的发生问题可以通过其与Nginx的配合实现Web服务器端的高可用。使用keepalived可以保证nginx的高可用他能监控nginx的健康状态当nginx出现宕机时自动主备切换。
一环境介绍
服务器名称IP用途Nginx_Master172.16.90.111提供负载均衡Nginx_Backup172.16.90.112提供负载均衡LVS-DR-VIP172.16.90.200网站的VIP地址Web1服务器172.16.90.113提供Web服务Web2服务器172.16.90.114提供Web服务 二项目部署
在Web服务器上配置Web测试页面
web01配置
cd /usr/share/nginx/html/
echo web test page,hostname -I. index.html
systemctl restart nginxweb02配置同上 nginx负载均衡配置
两台nginx做同样配置
1、安装nginx
yum install http://nginx.org/packages/rhel/7/x86_64/RPMS/nginx-1.10.0-1.el7.ngx.x86_64.rpm 2、配置nginx反向代理
[rootnginx_master ~]# cd /etc/nginx/conf.d/
[rootnginx_master conf.d]# mv default.conf{,.bak}
[rootnginx_master conf.d]# vim web.confupstream webpools {server 172.16.90.113;server 172.16.90.114;
}server {location / {proxy_pass http://webpools;index index.html;}
}3重启nginx服务并测试访问nginx
nginx -t
systemctl restart nginx客户端访问测试负载均衡
for ((i1;i10;i)); do curl 172.16.90.111; done 配置Nginx_Master
安装keepalived
yum install keepalived -y
通过vrrp_script实现对集群资源的监控1通过killall命令探测服务运行状态
配置keepalived
vim /etc/keepalived/keepalived.confvrrp_script chk_nginx {script killall -0 nginx#script /dev/tcp/127.0.0.1/80#script if [ -f /var/run/httpd/httpd.pid ];then exit 0;else exit 1;fi#script /etc/keepalived/check_nginx.shinterval 2fall 2rise 1}vrrp_instance VI_1 {state MASTERinterface ens32 //填你对应的网卡名称virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}notify_master /etc/keepalived/master.shnotify_backup /etc/keepalived/backup.shnotify_fault /etc/keepalived/fault.shtrack_script{chk_nginx}virtual_ipaddress {172.16.90.200/24 dev ens32}}相关参数说明
notify的用法
notify_master:当当前节点成为master时通知脚本执行任务(一般用于启动某服务比如 nginx,haproxy等)
notify_backup:当当前节点成为backup时通知脚本执行任务(一般用于关闭某服务比如nginx,haproxy等)
notify_fault当当前节点出现故障执行的任务;
根据提供的路径脚本路径编写提供日志记录的脚本
vim /etc/keepalived/master.sh
#!/bin/bash
LOGFILE/etc/keepalived/nginx_state.log
echo [master] $LOGFILE
date $LOGFILEvim /etc/keepalived/backup.sh
#!/bin/bash
LOGFILE/etc/keepalived/nginx_state.sh
echo [backup] $LOGFILE
date $LOGFILEvim /etc/keepalived/fault.sh
#!/bin/bash
LOGFILE/etc/keepalived/nginx_state.log
echo [dault] $LOGFILE
date $LOGFILE给文件赋予执行权限
chmod x /etc/keepalived/*.sh
Nginx_Backup配置同上
通过vrrp_script实现对集群资源的监控2、开发检测nginx存活的shell脚本
vim /etc/keepalived/check_nginx.sh#!/bin/bash
Aps -C nginx --no-header |wc -l
if [ $A -eq 0 ];thensystemctl start nginxsleep 3
if [ ps -C nginx --no-header |wc -l -eq 0 ]
thensystemctl stop keepalivedfi
fi给文件赋予执行权限
chmod x /etc/keepalived/*.sh
配置keepalived
vim /etc/keepalived/keepalived.confvrrp_script chk_nginx {#script killall -0 nginx#script /dev/tcp/127.0.0.1/80#script if [ -f /var/run/httpd/httpd.pid ];then exit 0;else exit 1;fiscript /etc/keepalived/check_nginx.shinterval 2fall 2rise 1}vrrp_instance VI_1 {state MASTERinterface ens32 //填你对应的网卡名称virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}notify_master /etc/keepalived/master.shnotify_backup /etc/keepalived/backup.shnotify_fault /etc/keepalived/fault.shtrack_script{chk_nginx}virtual_ipaddress {172.16.90.200/24 dev ens32}}Nginx_Backup配置同上
三项目测试
重启主从调度的nginx和keepalived
[rootnginx_master ~]# systemctl restart nginx keepalived
[rootnginx_backup ~]# systemctl restart nginx keepalived
MasterBackup都正常只有Master对外提供服务
[rootnginx_master ~]# ip a | grep 172.16.90.200
inet 172.16.90.200/24 scope global ens32
Master宕机Backup接替Master对外提供服务
模拟Master的keepalived服务器停止
[rootnginx_master ~]# systemctl stop keepalived.service
此时VIP在Backup上
[rootnginx_backup ~]# ip a | grep 172.16.90.200
inet 172.16.90.200/24 scope global ens32
在客户机上验证是否Backup接管后还能实现负载均衡
for ((i1;i10;i)); do curl 172.16.90.200; done
Master恢复正常Master继续提供服务Backup停止服务
模拟Master的keepalived服务恢复正常
[rootnginx_master ~]# systemctl start keepalived.service
此时VIP在Master上
[rootnginx_master ~]# ip a | grep 172.16.90.200
inet 172.16.90.200/24 scope global ens32
四实现不抢占模式
上述主节点一宕机备节点就会接管主节点修复好了又会重新接管服务。服务的切换存在一定的风险和不稳定性为了避免生产中多次网络抖动要实现不抢占模式
nopreempt 设置的是高可用集群中的不抢占功能:设置 nopreempt可以实现主节点故障恢复后不再切回到主节点让服务一直在备用节点下工作 直到备用节点出现故障才会进行切换。在使用不抢占功能时在“state” 状态为 “BACKUP” 的节点上设置,而且这个节点的优先级必须高于其他节点
Nginx_Master上
vim /etc/keepalived/keepalived.confvrrp_script chk_nginx {#script killall -0 nginx#script /dev/tcp/127.0.0.1/80#script if [ -f /var/run/httpd/httpd.pid ];then exit 0;else exit 1;fiscript /etc/keepalived/check_nginx.shinterval 2fall 2rise 1}vrrp_instance VI_1 {state BACKUP //原来的MASTER改为BACKUPinterface ens32 //填你对应的网卡名称virtual_router_id 51priority 100nopreept //添加这行advert_int 1authentication {auth_type PASSauth_pass 1111}notify_master /etc/keepalived/master.shnotify_backup /etc/keepalived/backup.shnotify_fault /etc/keepalived/fault.shtrack_script{chk_nginx}virtual_ipaddress {172.16.90.200/24 dev ens32}}
