建站服務(wù)器

使用keepalived+nginx+tomcat搭建高性能web服務(wù)器集群，前端用nginx做反向代理實(shí)現(xiàn)負(fù)載均衡，同時(shí)結(jié)合keepalived對(duì)nginx實(shí)現(xiàn)高可用，后端使用tomcat做動(dòng)態(tài)jsp解析，實(shí)現(xiàn)了動(dòng)靜分離。

十余年的滁州網(wǎng)站建設(shè)經(jīng)驗(yàn)，針對(duì)設(shè)計(jì)、前端、開(kāi)發(fā)、售后、文案、推廣等六對(duì)一服務(wù)，響應(yīng)快，48小時(shí)及時(shí)工作處理。營(yíng)銷(xiāo)型網(wǎng)站建設(shè)的優(yōu)勢(shì)是能夠根據(jù)用戶設(shè)備顯示端的尺寸不同，自動(dòng)調(diào)整滁州建站的顯示方式，使網(wǎng)站能夠適用不同顯示終端，在瀏覽器中調(diào)整網(wǎng)站的寬度，無(wú)論在任何一種瀏覽器上瀏覽網(wǎng)站，都能展現(xiàn)優(yōu)雅布局與設(shè)計(jì)，從而大程度地提升瀏覽體驗(yàn)。創(chuàng)新互聯(lián)從事“滁州網(wǎng)站設(shè)計(jì)”,“滁州網(wǎng)站推廣”以來(lái)，每個(gè)客戶項(xiàng)目都認(rèn)真落實(shí)執(zhí)行。

（本文永久地址：http://woymk.blog.51cto.com/10000269/1928716）

搭建環(huán)境：centos 6.9

準(zhǔn)備四臺(tái)服務(wù)器
vip: 192.168.75.130
master: 192.168.75.131 (安裝nginx做反向代理實(shí)現(xiàn)負(fù)載勻衡，結(jié)合keepalived實(shí)現(xiàn)高可用）
backup: 192.168.75.132 (同上)
web1: 192.168.75.151 (安裝nginx和tomcat實(shí)現(xiàn)動(dòng)靜分離)
web2: 192.168.75.152 (同上)
這里為節(jié)省服務(wù)器，nginx和tomcat裝在了一臺(tái)服務(wù)上，也可以分開(kāi)配置。

配置步驟如下：

1. 安裝nginx、tomcat軟件

四臺(tái)服務(wù)器分別安裝好nginx
安裝方法參見(jiàn)：LNMP環(huán)境搭建

web1，web2上分別安裝好tomcat

安裝方法參見(jiàn)：Tomcat8.5的安裝配置

web1, web2上分別啟動(dòng)nginx和tomcat
service nginx start
service tomcat start

2. 在master和backup上配置nginx

vi /usr/local/nginx/conf/nginx.conf

加入或修改以下內(nèi)容：

upstreamweb_nginx {
server 192.168.75.151;
server 192.168.75.152;
}

upstreamweb_tomcat {

#ip_hash;

server 192.168.75.151:8080;
server 192.168.75.152:8080;
}

server {
listen 80;
server_name localhost;

#charset koi8-r;

#access_log logs/host.access.log main;

location / {
proxy_pass http://web_nginx/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

location ~ \\.jsp$ {
proxy_pass http://web_tomcat/;
}

}

分別在master和backup上啟動(dòng)nginx服務(wù)

service nginx start

3. 配置keepalived

在master和backup上分別安裝keepalived
yum install -y keepalived

1) 配置master
vi /etc/keepalived/keepalived.conf
清空原文，加入如下內(nèi)容：
! Configuration File for keepalived

global_defs {
notification_email {
#acassen@firewall.loc
#failover@firewall.loc
#sysadmin@firewall.loc
}
#notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id LVS_DEVEL
}

vrrp_script chk_http_port {
script </dev/tcp/127.0.0.1/80
interval 1
weight -2
}

vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.75.130
}
track_script {
chk_http_port
}
}

2) 配置backup
scp 192.168.75.131:/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf

vi /etc/keepalived/keepalived.conf
backup的配置文件只需要修改
state MASTER -> state BACKUP
priority 100 -> priority 99

最后，分別在master和backup上啟動(dòng)keepalived服務(wù)，先主后備
/etc/init.d/keepalived start

4. 測(cè)試：

在master上停止nginx服務(wù)

[root@master ~]# /etc/init.d/nginx stop
停止 nginx： [確定]

在backup上查看日志

[root@backup ~]# tail -f /var/log/messages

May 23 17:21:33 backup Keepalived_vrrp[1818]: VRRP_Instance(VI_1) forcing a new MASTER election
May 23 17:21:33 backup Keepalived_vrrp[1818]: VRRP_Instance(VI_1) forcing a new MASTER election
May 23 17:21:34 backup Keepalived_vrrp[1818]: VRRP_Instance(VI_1) Transition to MASTER STATE
May 23 17:21:35 backup Keepalived_vrrp[1818]: VRRP_Instance(VI_1) Entering MASTER STATE
May 23 17:21:35 backup Keepalived_vrrp[1818]: VRRP_Instance(VI_1) setting protocol VIPs.
May 23 17:21:35 backup Keepalived_vrrp[1818]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.75.130
May 23 17:21:35 backup Keepalived_healthcheckers[1817]: Netlink reflector reports IP 192.168.75.130 added
May 23 17:21:40 backup Keepalived_vrrp[1818]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.75.130

日志顯示已經(jīng)成功切換到備用節(jié)點(diǎn)上。

[root@backup ~]# curl 192.168.75.130 -I
HTTP/1.1 200 OK
Server: nginx/1.10.3
Date: Tue, 23 May 2017 09:34:21 GMT
Content-Type: text/html
Content-Length: 616
Connection: keep-alive
Last-Modified: Mon, 22 May 2017 10:28:07 GMT
ETag: 5922bd37-268
Accept-Ranges: bytes

master停掉后，用curl訪問(wèn)web服務(wù)，一切正常。

當(dāng)前名稱(chēng)：keepalived+nginx+tomcat搭建高性能web服務(wù)器集群
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