Keepalived高可用Nginx

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实验拓扑：

Keepalived 高可用 Nginx

1. 在两台 realserver 上配置 web 服务

Keepalived 高可用 Nginx

2.keepalived 配置
master 的配置
global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
}

vrrp_script chk_down {#keepalived 控制脚本
script “[[-f /etc/keepalived/down]] && exit 1 || exit 0” #脚本内容
interval 2
weight -6
}

vrrp_script chk_nginx {#检测 nginx 服务脚本
script “killall -0 nginx && exit 0 || exit 1” #脚本内容
interval 2
weight -6
}

vrrp_instance VI_1 {#配置实例
state MASTER
interface eno16777736
virtual_router_id 88
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}

virtual_ipaddress {
10.1.88.88/16 dev eno16777736 label eno16777736:0
}

track_script {#调用脚本
chk_down
chk_nginx
}

notify_master “/etc/keepalived/notify.sh master” #定义通告脚本
notify_backup “/etc/keepalived/notify.sh backup”
notify_fault “/etc/keepalived/notify.sh fault”
}

backup 的配置：

global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
}

vrrp_script chk_down {
script “[[-f /etc/keepalived/down]] && exit 1 || exit 0”
interval 2
weight -6
}

vrrp_script chk_nginx {
script “killall -0 nginx && exit 0 || exit 1”
interval 2
weight -6
}

vrrp_instance VI_1 {
state BACKUP
interface eno16777736
virtual_router_id 88
priority 98
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}

virtual_ipaddress {
10.1.88.88/16 dev eno16777736 label eno16777736:0
}

track_script {
chk_down
chk_nginx
}

notify_master “/etc/keepalived/notify.sh master”
notify_backup “/etc/keepalived/notify.sh backup”
notify_fault “/etc/keepalived/notify.sh fault”
}

3.nginx 调度器配置
两台 nginx 调度器的配置文件
#http 段中的配置
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;

log_format main ‘$remote_addr – $remote_user [$time_local] “$request” ‘
‘$status $body_bytes_sent “$http_referer” ‘
‘”$http_user_agent” “$http_x_forwarded_for”‘;

access_log /var/log/nginx/access.log main;

sendfile on;
#tcp_nopush on;

keepalive_timeout 65;

#gzip on;

include /etc/nginx/conf.d/*.conf;

upstream webserver {
server 10.1.68.5 weight=1 max_fails=2;
server 10.1.68.6 weight=1 max_fails=2;
}

server {
listen 80;
server_name localhost;

location / {
index index.html index.htm;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://webserver;
}
}

}