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集群一 HAProxy+keepalived+varnsh
一、部署HAProxy(2台)
1、安装
yum install HAProxy
2、配置
vim /etc/haproxy/haproxy.cfg
global #全局配置
log 127.0.0.1 local3 #日志纪录位置
chroot /var/lib/haproxy #haproxy的工作目录
pidfile /var/run/haproxy.pid #pid文件位置
maxconn 4000 #最大连接数
user haproxy #运行时使用的用户身份
group haproxy #运行时使用的组身份
daemon #启动为守护进程，不加此处运行在前台
stats socket /var/lib/haproxy/stats #本地访问stats统计信息时以套接字方式通信
defaults #默认配置
mode http #已http模式运行
log global #默认日志为全局配置中日志的设置
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8 #除本机外所有发往服务器的请求首部中加入“X-Forwarded-For”首部
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000 #前端最大并发连接数
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend web *:80
#acl url_static path_beg -i /static /images /javascript /stylesheets
#acl url_static path_end -i .jpg .gif .png .css .js .html .txt .htm
#acl url_dynamic path_begin -i .php .jsp
#default_backend static_srv if url_static
#use_backend dynamic_srv if url_dynamic
use_backend varnish_srv
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend varnish_srv
balance uri #使用基于URL的一致性哈希调度算法
hash-type consistent
server varnish1 192.168.50.56:9527 check
server varnish2 192.168.50.57:9527 check
listen stats #开启HAProxy图形化Web管理功能
bind :9091
stats enable
stats uri /simpletime?admin
stats hide-version
stats auth admin:hequan.123
stats admin if TRUE
3、启动
systemctl start haproxy
systemctl status haproxy
systemctl enable haproxy
netstat -lntup
二、在haproxy部署keepalived
1、安装
yum install -y keepalived
2、配置
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id proxy1
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 1
weight -20
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 100
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.50.200/24
}
track_script {
chk_down
chk_haproxy
}
notify_master "/etc/keepalived/changemail.py master"
notify_backup "/etc/keepalived/changemail.py backup"
notify_fault "/etc/keepalived/changemail.py fault"
}
3、启动
systemctl start keepalived.service
systemctl enable keepalived.service
systemctl status keepalived.service
报警邮件设置
vim /etc/keepalived/changemail.py
#!/usr/bin/python
# -*- coding: UTF-8 -*-
import smtplib
import socket
import time
from email.MIMEText import MIMEText
from email.Utils import formatdate
from email.Header import Header
import sys
#发送邮件的相关信息，根据实际情况填写
smtpHost = ‘XXXXXXXXXXXXXXXXXXX‘
smtpPort = ‘25‘
sslPort = ‘110‘
fromMail = ‘XXXXXXXXXXXXXXXXX‘
toMail = ‘XXXXXXXXXXXX‘
username = ‘XXXXXXXXXX‘
password = ‘XXXXXXX‘
#解决中文问题
reload(sys)
sys.setdefaultencoding(‘utf8‘)
#邮件标题和内容
subject = socket.gethostname() + " HA status has changed"
body = (time.strftime("%Y-%m-%d %H:%M:%S")) + " vrrp transition, " + socket.gethostname() + " changed to be " + sys.argv[1]
#初始化邮件
encoding = ‘utf-8‘
mail = MIMEText(body.encode(encoding),‘plain‘,encoding)
mail[‘Subject‘] = Header(subject,encoding)
mail[‘From‘] = fromMail
mail[‘To‘] = toMail
mail[‘Date‘] = formatdate()
try:
#连接smtp服务器，明文/SSL/TLS三种方式，根据你使用的SMTP支持情况选择一种
#普通方式，通信过程不加密
smtp = smtplib.SMTP(smtpHost,smtpPort)
smtp.ehlo()
smtp.login(username,password)
#tls加密方式，通信过程加密，邮件数据安全，使用正常的smtp端口
#smtp = smtplib.SMTP(smtpHost,smtpPort)
#smtp.ehlo()
#smtp.starttls()
#smtp.ehlo()
#smtp.login(username,password)
#纯粹的ssl加密方式，通信过程加密，邮件数据安全
#smtp = smtplib.SMTP_SSL(smtpHost,sslPort)
#smtp.ehlo()
#smtp.login(username,password)
#发送邮件
smtp.sendmail(fromMail,toMail,mail.as_string())
smtp.close()
print ‘OK‘
except Exception:
print ‘Error: unable to send email‘
chmod +x /etc/keepalived/changemail.py
三、部署varnsh（2台）
1、安装
yum install varnish -y
2、配置
vim /etc/varnish/varnish.params
VARNISH_LISTEN_PORT=9527 #更改默认端口
vim /etc/varnish/default.vcl #修改配置文件
vcl 4.0;
##############启用负载均衡模块###############
import directors;
################定义Purge-ACL控制#######################
acl purgers {
"127.0.0.1";
"192.168.50.0"/24;
}
# Default backend definition. Set this to point to your content server.
##############配置健康状态探测##############
probe HE { #静态检测
.url = "/health.html"; #指定检测URL
.timeout = 2s; #探测超时时长
.window = 5; #探测次数
.threshold = 2; #探测次数成功多少次才算健康
.initial = 2; #Varnish启动探测后端主机2次健康后加入主机
.interval = 2s; #探测间隔时长
.expected_response = 200; #期望状态响应码
}
probe HC { #动态监测
.url = "/health.php";
.timeout = 2s;
.window = 5;
.threshold = 2;
.initial = 2;
.interval = 2s;
.expected_response = 200;
}
#############添加后端主机################
backend web1 {
.host = "192.168.50.58:80";
.port = "80";
.probe = HC;
}
backend web2 {
.host = "192.168.50.59:80";
.port = "80";
.probe = HC;
}
backend app1 {
.host = "192.168.50.60:80";
.port = "80";
.probe = HE;
}
backend app2 {
.host = "192.168.50.61:80";
.port = "80";
.probe = HE;
}
#############定义负载均衡及算法###############
sub vcl_init {
new webcluster = directors.round_robin();
webcluster.add_backend(web1);
webcluster.add_backend(web2);
new appcluster = directors.round_robin();
appcluster.add_backend(app1);
appcluster.add_backend(app2);
}
################定义vcl_recv函数段######################
sub vcl_recv {
#####ACL未授权，不允许PURGE，并返回405#####
if (req.method == "PURGE") {
if(!client.ip ~ purgers){
return(synth(405,"Purging not allowed for" + client.ip));
}
return (purge);
}
#####添加首部信息，使后端服务记录访问者的真实IP
# if (req.restarts == 0) {
# set req.http.X-Forwarded-For = req.http.X-Forwarded-For + ", " + client.ip;
# } else {
# set req.http.X-Forwarded-For = client.ip;
# }
# set req.backend_hint = webcluster.backend();
# set req.backend_hint = appcluster.backend();
#注：因为Varnish不是一级代理，配置forward只能取到上级代理IP，而上级代理IP，本身就包含在HAProxy发送过来的Forward里，所以没必要配置，而后端服务器只要日志格式有启用记录Forward信息，并且上级代理没有做限制，那么，就能获取到客户端真实IP；
#####动静分离#####
if (req.url ~ "(?i)\.(php|asp|aspx|jsp|do|ashx|shtml)($|\?)") {
set req.backend_hint = webcluster.backend();
}else{
set req.backend_hint = appcluster.backend();
}
#####不正常的请求不缓存#####
if (req.method != "GET" &&
req.method != "HEAD" &&
req.method != "PUT" &&
req.method != "POST" &&
req.method != "TRACE" &&
req.method != "OPTIONS" &&
req.method != "PATCH" &&
req.method != "DELETE") {
return (pipe);
}
#####如果请求不是GET或者HEAD，不缓存#####
if (req.method != "GET" && req.method != "HEAD") {
return (pass);
}
#####如果请求包含Authorization授权或Cookie认证，不缓存#####
if (req.http.Authorization || req.http.Cookie) {
return (pass);
}
#####启用压缩，但排除一些流文件压缩#####
if (req.http.Accept-Encoding) {
if (req.url ~ "\.(bmp|png|gif|jpg|jpeg|ico|gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)$") {
unset req.http.Accept-Encoding;
} elseif (req.http.Accept-Encoding ~ "gzip") {
set req.http.Accept-Encoding = "gzip";
} elseif (req.http.Accept-Encoding ~ "deflate") {
set req.http.Accept-Encoding = "deflate";
} else {
unset req.http.Accept-Encoding;
}
}
return (hash);
}
####################定义vcl_pipe函数段#################
sub vcl_pipe {
return (pipe);
}
sub vcl_miss {
return (fetch);
}
####################定义vcl_hash函数段#################
sub vcl_hash {
hash_data(req.url);
if (req.http.host) {
hash_data(req.http.host);
} else {
hash_data(server.ip);
}
if (req.http.Accept-Encoding ~ "gzip") {
hash_data ("gzip");
} elseif (req.http.Accept-Encoding ~ "deflate") {
hash_data ("deflate");
}
}
##############设置资源缓存时长#################
sub vcl_backend_response {
if (beresp.http.cache-control !~ "s-maxage") {
if (bereq.url ~ "(?i)\.(jpg|jpeg|png|gif|css|js|html|htm)$") {
unset beresp.http.Set-Cookie;
set beresp.ttl = 3600s;
}
}
}
################启用Purge#####################
sub vcl_purge {
return(synth(200,"Purged"));
}
###############记录缓存命中状态##############
sub vcl_deliver {
if (obj.hits > 0) {
set resp.http.X-Cache = "HIT from " + req.http.host;
set resp.http.X-Cache-Hits = obj.hits;
} else {
set resp.http.X-Cache = "MISS from " + req.http.host;
}
unset resp.http.X-Powered-By;
unset resp.http.Server;
unset resp.http.Via;
unset resp.http.X-Varnish;
unset resp.http.Age;
}
3、启动
systemctl start varnish.service
systemctl enable varnish.service
systemctl status varnish.service
4、查看，加载配置，因为还没有配置后端应用服务器，可以看到后端主机健康检测全部处于Sick状态
#varnishadm -S /etc/varnish/secret -T 127.0.0.1:6082
200
varnish> vcl.load conf1 default.vcl
200
VCL compiled.
varnish> vcl.use conf1
200
VCL ‘conf1‘ now active
varnish> backend.list
200
Backend name Refs Admin Probe
web1(192.168.50.58,,80) 2 probe Sick 0/5
web2(192.168.50.59,,80) 2 probe Sick 0/5
app1(192.168.50.60,,80) 2 probe Sick 0/5
app2(192.168.50.61,,80) 2 probe Sick 0/5本文出自 “何全” 博客，请务必保留此出处http://hequan.blog.51cto.com/5701886/1886307
集群一 HAProxy+keepalived+varnsh
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