keepalived高可用(haporxy)
keepalived高可用的介绍可以参考keepalived高可用(nginx)
环境
| 系统信息 | 主机名 | IP | 服务 |
|---|---|---|---|
| centos8 | master | 192.168.222.250 | haproxy,keepalived |
| centos8 | backup | 192.168.222.137 | haproxy,keepalived |
| centos8 | RS1 | 192.168.222.138 | httpd |
| centos8 | RS2 | 192.168.222.139 | nginx |
部署httpd,nginx
RS1
[root@localhost ~]# hostnamectl set-hostname RS1
[root@localhost ~]# bash
[root@RS1 ~]# systemctl stop firewalld.service //关闭防火墙
[root@RS1 ~]# vim /etc/selinux/config
SELINUX=disabled
[root@RS1 ~]# setenforce 0
[root@RS1 ~]# systemctl disable --now firewalld.service
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@RS1 ~]# dnf -y install wget
[root@RS1 ~]# cd /etc/yum.repos.d/
[root@RS1 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
//配置阿里源
[root@RS1 yum.repos.d]#sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
[root@RS1 yum.repos.d]# ls
CentOS-Base.repo
[root@RS1 yum.repos.d]# cd
[root@RS1 ~]# dnf -y install httpd
[root@RS1 ~]# echo "RS1" > /var/www/html/index.html
[root@RS1 ~]# cat /var/www/html/index.html
RS1
[root@RS1 ~]# systemctl enable --now httpd
Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service → /usr/lib/systemd/system/httpd.service.
[root@RS1 ~]# ss -antl //查看80端口
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:111 0.0.0.0:*
LISTEN 0 32 192.168.122.1:53 0.0.0.0:*
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 [::]:111 [::]:*
LISTEN 0 128 *:80 *:*
LISTEN 0 128 [::]:22 [::]:*
访问:
RS2
[root@localhost ~]# hostnamectl set-hostname RS2
[root@localhost ~]# bash
[root@RS2 ~]# systemctl stop firewalld.service //关闭防火墙
[root@RS2 ~]# vim /etc/selinux/config
SELINUX=disabled
[root@RS2 ~]# setenforce 0
[root@RS2 ~]# systemctl disable --now firewalld.service
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@RS2 ~]# dnf -y install wget
[root@RS2 ~]# cd /etc/yum.repos.d/
[root@RS2 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
//配置阿里源
[root@RS2 yum.repos.d]#sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
[root@RS2 yum.repos.d]# ls
CentOS-Base.repo
[root@RS2 yum.repos.d]# cd
[root@RS2 ~]# dnf -y install nginx
[root@RS2 ~]# echo "RS2" > /usr/share/nginx/html/index.html
[root@RS2 ~]# cat /usr/share/nginx/html/index.html
RS2
[root@RS2 ~]# systemctl enable --now nginx
Created symlink /etc/systemd/system/multi-user.target.wants/nginx.service → /usr/lib/systemd/system/nginx.service.
[root@RS2 ~]# ss -antl //查看80端口
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 0.0.0.0:80 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 128 [::]:80 [::]:*
访问:
部署haproxy负载均衡
master
[root@localhost ~]# host