Nginx + keepalived Dual machine hot standby

Last Update:2016-09-06 Source: Internet

Author: User

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Problem: After killing the keepalived process, the VIP offset can be achieved, but the original machine's VIP cannot be deleted automatically

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Dual-machine hot standby means that two machines are in operation, but not both machines are serving at the same time.
When one of the service providers fails, the other one will automatically take over and provide the service immediately, and the switch time is very short.

Keepalived works by vrrp--Virtual Routing Redundancy protocol.

The test environment is as follows:

	Ip	Vip
Master	192.168.174.135	192.168.174.140
Backup	192.168.174.137	192.168.174.140

Back to TopNginx

Installation

Install Nginx

Find profile Location

Find/-name nginx.conf/etc/nginx/nginx.conf

Modifying a configuration file (nginx.conf)

User www-Data;worker_processes4;p id/run/nginx.pid;events {worker_connections1024; Types_hash_max_size 2048mime.types; Default_type application/octet-stream; Access_log/var/log/nginx/access.log; Error_log/var/log/nginx/error.log; server {listen 80< Span style= "color: #000000;" > Default_server; server_name test; CharSet Utf-8; location/  {root HTML; index index.html index.htm; Proxy_set_header x real_ip $remote _addr; client_max_body_size 100m;} }}

File/usr/share/nginx/html/index.html

Add

Start

sudo service nginx start

Shut down

sudo service nginx stop

Back to Topkeepalived

Installation

Download keepalived-1.2.19.tar.gz

TAR–ZXVF keepalived-1.2.  tar. GZCD keepalived-1.2.  /configure--prefix=/usr/local/keepalived makeinstall

Problems may occur during:

!!! OpenSSL is not a properly installed on your system. !!!
!!! Can not include OpenSSL headers files. !!!

Solve

Install Libssl.dev

Create a soft link

Ln-s/usr/local/keepalived/sbin/keepalived/sbin/ln-s/usr/local/keepalived/etc/rc.d/init.d/keepalived/ etc/init.d/ln-s/usr/local/keepalived/etc/sysconfig/keepalived/etc/sysconfig/

Start

sudo keepalived-d-f/usr/local/keepalived/etc/keepalived/keepalived.conf

Shut down

Killall keepalived

Configuration (keepalived.conf):

global_defs {    router_id nodea}vrrp_instance vi_1 {State    MASTER     interface eth0        #监测网络接口     50 The   #主 must be the same as                #优先级: Master and prepare    11111192.168.  174.140/ #VRRP ha virtual address}}

Configuration of alternate nodes

global_defs {   router_id nodeb}vrrp_instance vi_1 {State    BACKUP    interface eth0        90      11111192.168.  174.140/ }}

Double-click Hot Spare

Both devices start Nginx and keepalived, the browser each access

Browser access: http://192.168.174.140/, which shows the master page.

The same IP appr can be used to verify:

135 Machine:

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 65536 qdisc noqueue State UNKNOWN Group Default

Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00

inet 127.0.0.1/8 Scope host Lo