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Ubuntu 16.04 haproxy + keeplive
WEB架构
阐述各服务器用途：
1、haproxy 实现后端Web服务器负载均衡
2、keepalived 实现对haproxy的高可用
3、apache static 实现静态页面的访问
4、aoache dynamic 实现动态页面的访问
What is Keepalived ?
Keepalived is a routing software written in C. The main goal of this project is to provide simple and robust facilities(能力) for loadbalancing and high-availability to Linux system and Linux based infrastructures. Loadbalancing framework relies(依赖) on well-known and widely used Linux Virtual Server (IPVS) kernel module providing Layer4 loadbalancing. On the other hand high-availability is achieved by VRRP protocol.
1、安装Keepalived
~# apt-get install keepalived
2、配置Keepalived
一个功能比较完整的keepalived 的配置文件，其配置文件keepalived.conf 可以包含三个文本块：
全局定义块
VRRP 实例定义块
虚拟服务器定义块
haproxy
安装配置链接
配置文件：
global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
stats socket /run/haproxy/admin.sock mode 660 level admin
stats timeout 30s
user haproxy
group haproxy
daemon
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private
# Default ciphers to use on SSL-enabled listening sockets.
# For more information, see ciphers(1SSL). This list is from:
# https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
ssl-default-bind-ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS
ssl-default-bind-options no-sslv3
defaults
log global
mode http
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
maxconn 60000
retries 3
timeout connect 10s
timeout client 1m
timeout server 1m
timeout check 10s
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
listen stats
bind 0.0.0.0:1080
stats refresh 30s
stats uri /stats
stats realm Haproxy Manager
stats auth admin:admin
frontend main
bind 0.0.0.0:80
acl url_static path_beg -i /static /images /javascript /stylesheets
acl url_static path_end -i .jpg .gif .png .css .js
acl url_dynamic path_end -i .jsp
use_backend static if url_static
use_backend dynamic if url_dynamic
default_backend static
backend static
balance roundrobin
server websrv1 192.168.20.178:80 check maxconn 1000
server websrv2 192.168.20.179:80 check maxconn 1000
backend dynamic
balance roundrobin
server dynamic1 192.168.20.177:8080 inter 3000 rise 2 fall 3 check maxconn 100
server dynamic2 192.168.20.181:8080 inter 3000 rise 3 fall 3 check maxconn 100
Ubuntu 16.04 haproxy + keeplive
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