load balancer virtual appliance

Lab Environment:redhat6.5 version Virtual machine 3 units:server1:172.25.44.10, Memory 1024m,cpu dual Coreserver2:172.25.44.20, Memory 512m,cpu single coreserver3:172.25.44.30, Memory 512m,cpu single coreThese three virtual machines iptables are off and SELinux is disabled state.the difference between Apache and Nginx :Nginx's advantages over Apache: Lightweight, also Web services, Nginx consumes less memor

virtual IP from the upper IP addr, the instructions from taking over the service; switching speed quickly;After the Lord initiates the Keepalived service, the master binds the virtual IP, takes over the service;[[Email protected] keepalived]# IP addreth1: The NC command can scan whether the port is open:Scan on other machines, 11.100 and 11.101,11.110 80 ports open;#nc-Z-w2 192.168.11.110 80[Email protecte

HAProxy is a proxy software that provides high availability, server load balancer, and TCP and HTTP applications, HAProxy is a completely free proxy solution that provides TCP and HTTP applications quickly and reliably with HAProxy. HAProxy is applicable to websites with large loads. these sites usually need session persistence or layer-7 processing. HAProxy supports tens of thousands of concurrent connecti

Server Load balancer solutions include hardware and software solutions. Mainstream hardware solutions: F5 BIG-IP Citrix netscalar A10 A10 Array Redware LVS (Linux virtual server) is a layer-4 network switching or routing software solution. It implements switching or routing through kernel framework module ipvs and a set of rules configured on the framework

server with the smallest number of successive4: Weighted minimum connection algorithm (WLC) is to give each server a weight, the scheduler will keep the number of server connections and weights as far as possible balance5: The least-Connection scheduling algorithm based on locality (LBLC) is a scheduling algorithm for the target IP address of the request packet, the algorithm first finds the most recent destination IP address for all used servers based on the destination IP address of the reque

) known for providing audio and video services to RealPlayer, The world's largest open source website (sourceforge.net). Using LVS to set up a server cluster system has three parts, the most front-end load balancer layer, with load balancer, the middle of the server group layer, with server array, the bottom of the dat

=" float: none; "title=" Tomsamlee1.png "alt=" Wkiom1f3coztf69naac-raenpug512.png "/>650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M00/88/6C/wKioL1f3cO_jPD00AADBjw-xilA024.png "style=" float: none; "title=" Tomsamlee2.png "alt=" Wkiol1f3co_jpd00aadbjw-xila024.png "/>Configure HTTPD to implement load balancing reverse proxy tomcatThe configuration file looks like this:# vim/etc/httpd/conf.d/proxy.confRestart the HTTPD service access test as fo

the proxy function of the Apache load balancer mod_proxy moduleThis is just the first time in the experimental environment to achieve Apache Agent, the implementation of the process is relatively simple, I am on a virtual machine (IP:192.168.1.116) using yum installed httpd,php and Tomcat,apache-tomcat-7.0.56. First step:yum installs httpd,php. After installation

; # fastcgi_index index.php; # fastcgi_param script_filename/ Scripts$fastcgi_script_name; # include Fastcgi_params; #} # Deny access to. htaccess files, if Apache ' s document Root# concurs with Nginx ' s one##location ~/\.ht {# Deny All;#}}# Another virtual host using mix of ip-, name-, and port-based configuration##server {# Listen 8000;# Listen somename:8080;# server_name somename alias Another.alias;# location/{# root HTML;# index index.

:./lvsrs.sh Stop off* Modify permissions before executing: chmod 755 lvsrs.sh4.4.2 VerificationRESL Server Configuration [[Email protected] ~]# IP add1:lo: Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00inet 127.0.0.1/8 Scope host Loinet 192.168.98.77/32 BRD 192.168.98.77 Scope Global lo:0INET6:: 1/128 Scope HostValid_lft Forever Preferred_lft Forever2:eth0: Link/ether 00:50:56:91:14:81 BRD FF:FF:FF:FF:FF:FFinet 192.168.98.118/24 BRD 192.168.98.255 Scope Global eth0Inet6 FE

Objective　　First to the big guys for a year, I wish you all: the New Year health Kang, safe!　　　　The formation of this article refers to a lot of people's blogs, the most should be the green years of the brother of this blog, we can first go to see, familiar with some content, because this article is direct practice, some theoretical knowledge needs to be supplemented by their own.This article is in my previous environment LVS + keepalived + Nginx + Tomcat to achieve master-slave hot standby +

1. Like Apache, they are both HTTP server software and adopt Modular Design for function implementation. They all support common language interfaces. At the same time, they also support forward and reverse proxies, virtual hosts, and URL rewriting,CompressionTransmission, SSL encrypted transmission, and so on. However, in terms of execution efficiency, nginx processes faster and consumes less memory resources. In addition, nginx also supports fcgi, wh

] ~]# Curl 192.168.11.110rs2rs2rs2Change the polling algorithm to WRR, the weight is 2, and then execute the file, the error hint file already exists , because the /usr/local/sbin/lvs_dr.sh script file is already up eth1:0, So need to add in the script: Ifconfig eth1:0 down, then will not error;$IPV-A-t $VIP: 80-s wrr$ipv-a-T $vip: 80-r $rs 1:80-g-W 2$ipv-a-t $vip: 80-r $rs 2:80-g-W 1[[email protected] ~]# BASH/USR/LOCAL/SBIN/LVS_DR.SHSIOCADDRT: File already existsIf one of the RS is hung, it wi

Nginx configuration file:nginx安装目录/conf/nginx.confReload the configuration file./nginx -s reloadConfiguring a virtual HostOne server is a single virtual host server { listen 80;//监听端口 server_name localhost;//域名 location / { root html; index index.html index.htm; } }Reverse Proxy and load balancingupstrea

One, reverse proxyDescription: There should be an Nginx server with multiple application servers (which can be Tomcat), this article uses a virtual machine, installs an nginx, multiple tomcat, to simulateUpstream Tomcats{server 192.168.25.148:8080;server 192.168.25.148:8081;} server { listen ; server_name tomcat.taotao.com; #charset Koi8-r; #access_log logs/host.access.log main; Location/{ proxy_p

Ngigx + Tomcat configure static/dynamic separation, Server Load balancer, and ngigxtomcat Since the company used Ngnix, I felt a little curious about Nginx, So I studied it. My version used in windows is nginx-1.8.1: 1. Start Ngnix Double-click nginx-1.8.1. nginx.exe in the folder. If two nginx processes exist in the task manager, the startup is successful! 2. Common Ngnix commands Forced nginx-s stop Shutd

Resttemplate can be automatically configured to use the Ribbon. To create a load balancing resttemplate create a resttemplate @Bean and use the @loadbalanced qualifier.Warning: resttemplate beans are no longer created with automatic configuration. It must be created by a single application.@Configurationpublic class MyConfiguration { @LoadBalanced @Bean RestTemplate restTemplate() { return new RestTemplate(); }}public class MyClass

RestTemplateCan be automatically configured to use the Ribbon. Create RestTemplate RestTemplate @Bean and use qualifiers to create load balancing @LoadBalanced .Warning: Beans are no longer created through automatic configuration RestTemplate . It must be created by a single application.@Configuration Public classmyconfiguration {@LoadBalanced @Bean resttemplate resttemplate () {return Newresttemplate (); }} Public classMyClass {@AutowiredPrivaterest

Resttemplate can be automatically configured to use the Ribbon. To create a load balancing resttemplate create a resttemplate @Bean and use the @loadbalanced qualifier.Warning: resttemplate beans are no longer created with automatic configuration. It must be created by a single application.@Configurationpublic class MyConfiguration { @LoadBalanced @Bean RestTemplate restTemplate() { return new RestTemplate(); }}public class MyClass

Resttemplate can be automatically configured to use the Ribbon. To create a load balancing resttemplate create a resttemplate @Bean and use the @loadbalanced qualifier.Warning: resttemplate beans are no longer created with automatic configuration. It must be created by a single application.@Configurationpublic class MyConfiguration { @LoadBalanced @Bean RestTemplate restTemplate() { return new RestTemplate(); }}public class MyClass