如何搭建keepalived+nginx+httpd+dns高可用双主反向代理服务器
如何搭建keepalived+nginx+httpd+DNS高可用双主反向代理服务器，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
成都创新互联公司制作网站网页找三站合一网站制作公司,专注于网页设计,网站设计制作、成都网站制作,网站设计,企业网站搭建,网站开发,建网站业务,680元做网站,已为近千家服务,成都创新互联公司网站建设将一如既往的为我们的客户提供最优质的网站建设、网络营销推广服务!
1.rs服务器安装httpd，ip为：192.168.122.5，192.168.122.6
2.rs配置好web页面并启动服务
3.node1两块网卡，一块是外网172.16.0.3，一个内网192.168.122.3
4.node2两块网卡，一块是外网172.16.0.4，一个内网192.168.122.4
5.node1配置时间服务器，其余三台来同步时间
6.nod1配置好nginx反向代理后端两台rs,并测试
7.nod2配置好nginx反向代理后端两台rs,并测试
yun -y install nginx
http {
upstream webservers {
server 192.168.122.5:80;
server 192.168.122.6:80;
}
server {
location / {
proxy_pass http://webservers;
}
}
8.两节点安装keepalived
9.node1配置高可用
vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localdomain ##本地通知
}
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
vrrp_mcast_group4 224.1.1.33 ##多播地址
}
#集群1
vrrp_instance VI_1 {
state MASTER ##主节点标志
interface ens33
virtual_router_id 51 #集群1ID
priority 100 #点点优先级，越高就是主
advert_int 1
authentication {
auth_type PASS
auth_pass %^*AJOoj78j.
}
virtual_ipaddress {
172.16.0.90/16 dev ens33 label ens33:0 ##集群VIP
}
}
#集群2
vrrp_instance VI_2 {
state BACKUP
interface ens33
virtual_router_id 44 #集群ID，唯一值，不能跟其他集群ID相同
priority 96
advert_int 1
authentication {
auth_type PASS
auth_pass J%(#Qjb78.
}
virtual_ipaddress {
172.16.0.91/16 dev ens33 label ens33:1
}
}
10.node2配置高可用
[root@node2 keepalived]# vi keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localdomain
}
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
vrrp_mcast_group4 224.1.1.33
}
vrrp_instance VI_1 {
state BACKUP ##集群1的备节点
interface ens33
virtual_router_id 51
priority 96
advert_int 1
authentication {
auth_type PASS
auth_pass %^*AJOoj78j.
}
virtual_ipaddress {
172.16.0.90/16 dev ens33 label ens33:0
}
}
vrrp_instance VI_2 {
state MASTER ##集群2的主节点，这样就够成了双主模式
interface ens33
virtual_router_id 44
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass J%(#Qjb78.
}
virtual_ipaddress {
172.16.0.91/16 dev ens33 label ens33:1
}
}
到此服务已可以正常使用，测试
curl http://172.16.0.91
curl http://172.16.0.90 均可正常访问到后端两主机
当一台主机出故障时自动降为备节点,另一台会自动接管,服务不会宕机.
停止节点1的服务,查看节点的2rip
systemctl stop keepalived.service
ifconfig
journalctl -f -u keepalived.service 查看日志
11.建立nginx检测脚本,当一台ngix服务没启的时候同样降为备节点,另一台会自动接管,服务不会宕机.
vi /etc/keepalived/chk_nginx.sh
#!/bin/bash
#
killall -0 nginx || weight -10
增加可执行权限 chmod u+x chk_nginx.sh
12.配置调用126发邮件设置
1.获取126SSL发送证书
mkdir -p /root/.certs/
cd /root/.certs/
echo -n | openssl s_client -connect smtp.126.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/qq.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/qq.crt
certutil -L -d /root/.certs/
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ./ -i qq.crt
2.配置postfix
vi /etc/postfix/main.cf
inet_interfaces = all
inet_protocols = all
systemctl enable postfix
systemctl restart postfix
3.配置调用126发邮件
vi /etc/mail.rc
set from=xxxxxxxx@126.com --邮箱用户名
set smtp=smtps://smtp.126.com:465
set smtp-auth-user=xxxxxxxx@126.com --邮箱用户名
set smtp-auth-password=ajbjs465785 --注意这是授权码
set smtp-auth=login
set ssl-verify=ignore
set nss-config-dir=/root/.certs
13.通知脚本：当成主/备节点时都启动nginx,两个节点都一样
cd /etc/keepalived/
vi notify.sh
#!/bin/bash
#
contact='xxxxxxx@qq.com' --接收邮件的邮箱
notify() {
local mailsubject="$(hostname) to be $1,vip floating"
local mailbody="$(date +'%F %T'):vrrp transition,$(hostname) changed to be $1 "
echo "$mailbody" | mail -s "$mailsubject" $contact
}
case $1 in
master)
systemctl start nginx ##当成为主节点时启动nginx
notify master;;
backup)
systemctl start nginx ##因为双主模式,所以当成为备节点时不能停止nginx,一定要启动nginx,作为另一个主节点
notify backup;;
fault)
notify fault;;
*)
echo "error"
exit 1 ;;
esac
增加执行权限
chmod u+x notify.sh
测试成为备节点时通知邮件能不能正常发送
./notify.sh backup
14.在配置文件中全局配置下,集群配置上调用nginx检测脚本,并持续追踪.(见最终配置文件)
vrrp_script chk_nginx {
script "/etc/keepalived/chk_nginx.sh"
fall 3
rise 3
}
15.在集群内跟踪检测结果.(见最终配置文件)
track_script {
chk_down
chk_nginx
}
16.在两个集群内部调用通知脚本. (见最终配置文件)
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
16.查看日志
journalctl -f -u keepalived
17.测试停止node1,nginx,查看是否降为备节点,查看日志,查看是否邮件通知,查看ip,客户端两个VIP能否正常访问.
18.最终配置文件
##节点1
[root@node1 keepalived]# cat keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localdomain
}
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
vrrp_mcast_group4 224.1.1.33
}
vrrp_script chk_nginx {
script "/etc/keepalived/chk_nginx.sh"
fall 3
rise 3
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass %^*AJOoj78j.
}
virtual_ipaddress {
172.16.0.90/16 dev ens33 label ens33:0
}
track_script {
chk_nginx
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
vrrp_instance VI_2 {
state BACKUP
interface ens33
virtual_router_id 44
priority 96
advert_int 1
authentication {
auth_type PASS
auth_pass J%(#Qjb78.
}
virtual_ipaddress {
172.16.0.91/16 dev ens33 label ens33:1
}
track_script {
chk_nginx
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
##节点2
cat keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localdomain
}
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
vrrp_mcast_group4 224.1.1.33
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 96
advert_int 1
authentication {
auth_type PASS
auth_pass %^*AJOoj78j.
}
virtual_ipaddress {
172.16.0.90/16 dev ens33 label ens33:0
}
track_script {
chk_nginx
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
vrrp_instance VI_2 {
state MASTER
interface ens33
virtual_router_id 44
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass J%(#Qjb78.
}
virtual_ipaddress {
172.16.0.91/16 dev ens33 label ens33:1
}
track_script {
chk_nginx
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
19.dns 服务器.ip:172.16.0.7.将两个VIP 172.16.0.90/91 解析成www.bjs.io,并顺序解析
yum -y install bind
##正向区域数据
vi /etc/named.conf
zone "bjs.io" IN {
type master;
file "bjs.io.zone";
};
##反向区域数据
zone "0.16.172.in-addr.arpa" IN {
type master;
file "0.16.172.in-addr.arpa";
};
##正向区域数据文件
vi /var/named/bjs.io.zone
$TTL 1D
@ IN SOA ns1.bjs.io root.localdomain 2019011601 1H 10M 3D 1D
IN NS ns1
ns1 IN A 172.16.0.7
www IN A 172.16.0.90
www IN A 172.16.0.91
##反向区域数据文件
vi /var/named/0.16.172.in-addr.arpa
$TTL 1D
@ IN SOA ns1.bjs.io root.localdomain 2019011601 1H 10M 3D 1D
IN NS ns1.bjs.io.
7 IN PTR ns1.bjs.io.
90 IN PTR www.bjs.io.
91 IN PTR www.bjs.io.
看完上述内容，你们掌握如何搭建keepalived+nginx+httpd+dns高可用双主反向代理服务器的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注创新互联行业资讯频道，感谢各位的阅读！
分享文章：如何搭建keepalived+nginx+httpd+dns高可用双主反向代理服务器
文章网址：http://pwwzsj.com/article/ghdogh.html
