Nginx highly available configuration keepalived

Bobo roast duck 2020-11-13 04:56:56
nginx highly available configuration keepalived


Nginx High availability

Why a high availability configuration is needed
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Single Nginx Load balance the whole system , If nginx Hang up , Then the whole system will crash , At this point, we need to make sure we're on time 1 individual Nginx Hang up , The whole system is also available .
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Now we need to implement Nginx High availability ,nginx High availability needs to be matched with keepalived Together .

preparation

1. Two nginx service

The deployment of two Linux node ,ip Respectively 192.168.12.120 and 198.168.12.121, To start, respectively, nginx
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2. Two keepalived service

1).yum Command to install keepalived

yum install -y keepalived

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2) After installation , stay etc It generates a directory keepalived, Documents keepalived.conf

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3. Complete highly available configuration

modify /etc/keepalived/keepalivec.conf The configuration file

global_defs {

notification_email {

acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.17.129
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_http_port {

script "/usr/local/src/nginx_check.sh"
interval 2 #( Detects the interval between script execution )
weight 2
}
vrrp_instance VI_1 {

state BACKUP
# On the backup server MASTER Change it to BACKUP
interface ens33 // network card
virtual_router_id 51
# Lord 、 Standby virtual_router_id It has to be the same 
priority 90
# Lord 、 The standby machine takes different priorities , The main engine is worth a lot , The value of the backup machine is small 
advert_int 1
authentication {

auth_type PASS
auth_pass 1111
}
virtual_ipaddress {

192.168.12.150 // VRRP H Virtual address
}
}

stay /usr/local/src Add detection script

#!/bin/bash
A=`ps -C nginx –no-header |wc -l`
if [ $A -eq 0 ];then
/usr/local/nginx/sbin/nginx
sleep 2
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
killall keepalived
fi
fi

Put two servers on nginx and keepalived start-up
start-up nginx:./nginx
start-up keepalived:systemctl start keepalived.service

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4. Final test

Enter in the address bar 192.168.12.150:8088

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Successful visit

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take master Corresponding nginx and keepalived Stop

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The service is still available .

Indicates that the configuration is in effect .

版权声明
本文为[Bobo roast duck]所创,转载请带上原文链接,感谢

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