The HAProxy reverse proxy server supports dual-host hot standby and supports virtual hosts. the configuration is simple and has a very good server health check function. When the back-end server of the proxy fails, HAProxy will automatically remove the server, and then automatically add the server after the fault is restored. Mysql Cluster Proxy
The HAProxy rever
Build a Web cluster using Haproxy
Case Overview: Haproxy is currently a popular cluster scheduling tool. In comparison, LVS performance is the best, but the construction of complex, Nginx upstream module support cluster function, but the cluster node health Check function is not strong, performance is not haproxy good.
Lab Environment:
Tags: outer netstat bind stat Code load Blog backend service textHttp://www.cnblogs.com/tae44/p/4717334.html Experimental system: CentOS 6.6_x86_64 (2.6.32-504.30.3.el6.x86_64) Lab Prerequisites: Firewall and SELinux are off The experiment shows that there are 4 hosts in this experiment, such as the topology of IP assignment Experimental software: keepalived-1.2.19 haproxy-1.5.14 mariadb-10.0.20 : Http://pan.baidu.com/s/1bnnYiMr Experimental topology:
Recently, a company's business has been growing fast, resulting in heavy pressure on front-end servers. in order to solve this problem as soon as possible, I submitted a request for purchasing servers to the company. soon the company approved the request and the servers were in place. how can we reasonably utilize the resources of newly purchased servers (originally a front-end server)? First, we thought that using nginx for load was a recent rapid development of a company's business, the pressu
1. Preface
The previous section implemented a technical solution based on LVS (DR) + keepalived cluster. However, in terms of usage and maintenance, it was found that it is more difficult to maintain and implement than the haproxy + keepalived technical solution, the haproxy + keepalived cluster for Web applications is sufficient. Therefore, we recommend the haproxy
Haproxy + Apache for Linux Server Load balancer Software
Haproxy provides high availability, Server Load balancer, and reverse proxy Based on TCP and HTTP applications, especially for websites with extremely high loads that usually require session persistence or layer-7 processing. Haproxy runs on the current hardware and supports tens of thousands of concurrent
Keepalived
Due to the use of mysqlcluster in the production environment, high availability load balancing is required, and keepalived+haproxy is provided here for implementation.
The main function of keepalived is to realize the fault isolation of the real machine and the failover between load balancer. Can be exchanged at the 3,4,5 layer. It is implemented through VRRPV2 (Virtual Router redundancy) stack.
Layer3:keepalived periodically to servers
1. The architecture diagram of this article:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/25/90/wKioL1Nki0jiTqeUAAE35qbWq7g043.jpg "title=" Haproxy, Keepalived.png "alt=" Wkiol1nki0jitqeuaae35qbwq7g043.jpg "/>Describe the purpose of each server:1, Haproxy in this framework is the implementation of: Load Balancing2, keepalived to achieve the high availability of haproxy3, Apache static page acce
What is Haproxy?Haproxy is a free and open source software written in C that provides high availability, load balancing, and TCP and HTTP-based application proxies that can run on most major Linux operating systems.This experiment uses three servers to build a Web cluster, haproxy as a dispatch server, two Nginx servers as node servers.Experimental environment
Project Practice 4-haproxy Server Load balancer and ACL control, haproxyacl
Haproxy implements advanced Load Balancing
Environment: With the development of the company's business, the company's server Load balancer service has achieved layer-4 Server Load balancer, but the business complexity has increased, the company requires the mobile phone site as a separate service to provide, if you do not provide
Haproxy compared to the use of LVS is much simpler, functional aspects are also very rich. Currently, Haproxy supports two main proxy modes: "TCP" is also 4 layers (mostly for mail servers, internal protocol communications Servers, etc.), and 7 tiers (HTTP). In 4-tier mode, Haproxy only forwards bidirectional traffic between the client and the server. In 7-tier m
HAProxy provides high availability, Server Load balancer, and TCP and HTTP application-based proxy. It supports Virtual Hosts and is a free, fast, and reliable solution. HAProxy is especially suitable for websites with extremely high loads, which usually require session persistence or layer-7 processing. HAProxy runs on current hardware and supports tens of thous
Haproxy is a popular cluster scheduling tool, with many similar cluster scheduling tools, such as LVS and Nginx. In comparison, LVS performance is the best, but the construction of relatively complex, Nginx upstream module support cluster function, but the cluster node health Check function is not strong, performance is not haproxy good. Lab Environment:
Host
Operating System
IP Ad
Haproxy is a popular cluster scheduling tool, with many similar cluster scheduling tools, such as LVS and Nginx. In comparison, LVS performance is the best, but the construction of relatively complex, Nginx upstream module support cluster function, but the cluster node health Check function is not strong, performance is not haproxy good. Lab Environment:
Host
Operating System
IP Ad
can be used as the default gateway of the LAN client, greatly reducing the possibility that the default gateway becomes a single point of failure;
Load Sharing: allow traffic from LAN clients to be shared by multiple router devices;
Multiple VRRP groups: up to 255 VRRP groups can be configured on one vro physical interface;
Multi-IP Address: You can configure multiple IP addresses on the same physical interface based on the Interface alias to allow access to multiple subnets on the same physica
HAProxy is currently a popular cluster scheduling tool, similar cluster scheduling tool, compared with LVS, LVS performance is the best, but the building is relatively complex, Nginx upstream module support cluster function, but the cluster node health Check function is not strong, performance is not HAProxy good.System environment
Host
IP Address
main software
Overview:Haproxy is a cluster scheduling tool that provides high availability, load balancing, and proxy software based on TCP (layer fourth) and HTTP (layer seventh) applications, supporting virtual hosting, which is a free, fast, and reliable solution. Haproxy is especially useful for Web sites that are heavily loaded, and often require session-hold or seven-tier processing. Haproxy runs on today's hardwa
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