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(11) nginx + keepalived 双机热备

發布時間：2024/1/23 编程问答 22 豆豆

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轉載地址： ?http://www.cnblogs.com/kaituorensheng/p/4889268.html

閱讀目錄

序
nginx
keepalived
測試
問題：殺死keepalived進程后，可以實現vip的偏移，但是原機器的vip無法自動刪除

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序

雙機熱備是指兩臺機器都在運行，但并非兩臺機器同時在提供服務。
當提供服務的一臺出現故障的時候，另外一臺會馬上自動接管并且提供服務，且切換的時間非常短。

keepalived的工作原理是VRRP——虛擬路由冗余協議。

測試環境如下：

?	ip	vip
master	192.168.174.135	192.168.174.140
backup	192.168.174.137	192.168.174.140

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nginx

安裝

sudo apt-get install nginx?

查找配置文件位置

sudo find / -name nginx.conf /etc/nginx/nginx.conf

修改配置文件（nginx.conf）

user www-data; worker_processes 4; pid /run/nginx.pid;events {worker_connections 1024; }http {sendfile on;tcp_nopush on;tcp_nodelay on;keepalive_timeout 65;types_hash_max_size 2048;include /etc/nginx/mime.types;default_type application/octet-stream;access_log /var/log/nginx/access.log;error_log /var/log/nginx/error.log;server {listen 80 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;}} }

文件/usr/share/nginx/html/index.html

在192.168.174.135上加上? <h1>Welcome to nginx!? 135? </h1>

在192.168.174.137上加上? <h1>Welcome to nginx!?? ***137***?? </h1>

啟動

sudo service nginx start

關閉

sudo service nginx stop 回到頂部

keepalived

安裝

下載keepalived-1.2.19.tar.gz

tar –zxvf keepalived-1.2.19.tar.gz cd keepalived-1.2.19 ./configure --prefix=/usr/local/keepalived make sudo make install

期間可能出現問題：

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

解決

sudo apt-get install libssl.dev

建立軟鏈接

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

啟動

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

關閉

sudo killall keepalived

配置（keepalived.conf）：

global_defs {router_id NODEA }vrrp_instance VI_1 {state MASTER interface eth0 #監測網絡接口 virtual_router_id 50 #主、備必須一樣 priority 100 #優先級：主＞備advert_int 1authentication {auth_type PASS #VRRP認證，主備一致auth_pass 1111 #密碼 }virtual_ipaddress {192.168.174.140/24 #VRRP HA虛擬地址} }

備用節點的配置

global_defs {router_id NODEB }vrrp_instance VI_1 {state BACKUPinterface eth0virtual_router_id 50priority 90 advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.174.140/24} } 回到頂部

測試

雙擊熱備

兩臺機子均啟動nginx和keepalived，瀏覽器各自訪問

瀏覽器訪問：http://192.168.174.140/，顯示的是MASTER的頁面。

同樣用ip appr可以驗證：

135機器：

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