barracuda virtual load balancer

SQLRelay0.50 includes some improvements to using SQLServer through FreeTDS, adding parameters to format the date and time, and fixing other bugs and memory leaks. SQLRelay is a persistent database connection pool that provides database connection pools, proxies, and Server Load balancer for Unix or Linux. SQL Relay 0.50 includes some improvements to using SQL Server through FreeTDS, adding parameters to fo

, which is the VIP address above, is shared by the director server and all real servers,If there is an ARP request VIP address, the Director server responds with all real servers, and the problem occurs.Therefore, the real server needs to be prevented from responding to ARP requests.Third, configure the Tomcat service on the real server, slightly. To build an HTML file in 192.18.8.5, the contents are:This is the test pageFrom server 192.168.8.5To build an HTML file in 192.18.8.6, the contents ar

1 , LVS , TUN IntroductionLVS is a Linux Virtual Server in the actual environment, often as b/S structure of the network application in the load balancer to use, working in 7 Layer network model, the network layer, which is usually said IP layer, because the data is processed in Linux The kernel state is complete, so the relative reverse proxy server, the perform

: VMware8.0, three CentOS5.6 virtual machines Server Configuration C_server 8.8.8.1 D_SERVER0 8.8.8.8 (Public network IP) D_server1 192.168.10.1 (LAN IP) R_server1 192.168.10.2(LAN IP) R_server2 192.168.10.3(LAN IP) Ensure that C_server and D_SERVER0 can communicate with each other, d_server1,r_server1 and r_server2 can communicate with each other, and R_server1 and R_server2 gateways point to D_ Server1 (Command: Route add default GW 192.168.10.1), i

LVSis aLinux Virtual Serverthe short, meaning thatLinux Virtual Server, is a virtual server cluster system. Founded in May 1998 by Dr. Zhangwensong, this project is the first free software project in ChinaA. Projects that host WCF services for IIS implement high-availability load balancing in a way that LVS + keepalive

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

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

/nginx/conf.d/*.conf; Upstream Ken {server 172.20.10.8 weight=1 max_fails=3 fail_timeout=5; Server 172.20.10.9 weight=2 max_fails=3 fail_timeout=5; } server {Listen default_server; Listen [::]:80 default_server; server_name _; root/var/www/html; Index index.php index.html; # Load configuration files for the default server block. # Include/etc/nginx/default.d/*.conf; Location/{Proxy_passhttp://ken/;

Detailed configuration of Server Load balancer in lvs dr mode in CentOS 1. Prepare for LVS installation: 1. Prepare four Centos 6.2 x86_64 Note: SELinux and IPtables firewalls are disabled in this experiment. Management IP address role remarks 192.168.1.101LVS Master scheduler (Master ctor) provides external services with VIP 192.168.1.180192.168.1.114LVS slave scheduler (Backup Director) which can be used

=" 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

With load balancing, modify the configuration HTTP node as follows:#设定http服务器, using its reverse proxy function to provide load balancer support http{ #设定mime类型, type defined by Mime.type file include/etc/nginx/ mime.types;default_typeapplication/octet-stream; #设定日志格式 access_log/var/log/ nginx/access.log; #省略上文有的一些配置节点 # ..... #设定负载均衡的服务器列表 upstreammysvr{ #we

A brief introduction to the principle1.HAProxyHaproxy provides high availability, load balancing, and proxies based on TCP and HTTP 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 hardware and can support tens of thousand

A brief introduction to the principle1.HAProxyHaproxy provides high availability, load balancing, and proxies based on TCP and HTTP 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 hardware and can support tens of thousand

DocumentRootDocumentRoot "/data/wwwroot/polyguide"About 477 lines, remove comments, enable Apache to turn on the virtual host functionInclude/etc/httpd/extra/httpd-vhosts.conf(2) Edit httpd virtual Host configuration fileVim/etc/httpd/extra/httpd-vhosts.confServerName a.pl.com #基于域名的虚拟主机DocumentRoot "/data/wwwroot/polyguide"Options Noneallowoverride NoneRequire all granted #允许所有用户访问Rewriteengine onRewriter

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 +

] ~]# 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

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

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