ec2 load balancer

I. LVS principles 1. The full name of LVS is Linux Virtual Server, that is, Linux Virtual Server. It is an open-source project of Dr. Zhang Wenyu from our country. In linux memory 2.6, it has become a part of the kernel. in earlier versions, the kernel needs to be re-compiled ., LVS is mainly used for multi-server load balancing. It works at the network layer to implement high-performance and high-availability server cluster technology. It is cheap an

Zhang Hua posted: 2015-11-13Copyright notice: Can be reproduced arbitrarily, please be sure to use hyperlinks in the form of the original source of the article and the author's information and this copyright notice(http://blog.csdn.net/quqi99) Four-tier load balancing is to determine which traffic needs to be load balanced by publishing a three-tier IP address (VIP), and then add a four-tier port n

Clusters, such as buying a generation to push the server down and put a piece he's quite a cluster, and load balancing is to get this big bunch of servers to work on average. He is called load Balancer, as shown in:For example, I use 192.168.8.155 to act as a pic host 1 and PIC Host 2 with Server A, 192.168.8.166, and 192.168.8.177来 as follows:Then start modifyin

load balancing is mainly through the server node to install the device specifically for load balancing, such as F5, and software load balancing is to complete the request distribution work by installing some software with load balancing function or module on the server, such as Nginx, etc. Whether you are using hardwa

Iping object that checks whether a service instance is functioning properly, defaults to NULL, and constructs a time injectionDefines the execution policy object ipingstrategy for checking service instance operations, in BaseloadbalancerSerialpingstrategy is used by default, traverse checkIrule object that defines the processing rules for load balancing, from BaseloadbalancerChooseserver (Object key), which actually delegates the selection task to th

requestsDoRouting.First, assume that each request is processed by a computer on the server. If the external request load is evenly distributed to each computer node, the server load balancer will be successful.Without considering the backend technology of distributed databases, the core of server load

1. Story ReviewIn my previous blog, I built two Web servers and then built an nginx load balancer server on the front end to distribute the requests to two different servers (http://blog.51cto.com/superpcm/2095324). The previous test is not a problem because the test program is a static web site that is purely static and does not change. Later I set up on both the web to build a WordPress service, and then

Linux Cluster Server Load balancer lab notes I,Network Topology: II,Virtual Machine Configuration Create three virtual machines on one physical computer.WindowsOperating System, Configuration192.168.1.0The IP address of the CIDR block.Centos5.4. One Server Load balancer instance must be configured with two NI

I. Introduction to the Basic overviewIi. types and principles of LVSThree, LVS scheduling algorithmIv. using DR and Nat to achieve web load balancingI. Introduction to the Basic overviewLVS is a load balancing software that works at the transport level and consists of two components of the IPVSADM and kernel space of the user space Ipvs. The Ipvsadm is a command-line tool for user space, primarily for manag

ngx_posted_accept_events queue can be processed first. After processing, the ngx_accept_mutex lock will be released, and then the time in the ngx_posted_events, this greatly reduces the time occupied by the ngx_accept_mutex lock. Server Load balancer When establishing a connection, when multiple sub-processes compete for a new connection time, only one worker sub-process will eventually connect the resume,

: % M: % S % Y]"# JkMount/*. * controller7./Etc/httpd/conf/Create and configure the workers. properties fileWorker. list = controller, statusWorker. tomcat129.port = 8009Worker. tomcat129.host = 192.168.152.129Worker. tomcat129.type = ajp13Worker. tomcat129.lbfactor = 1Worker. tomcat130.port = 8009Worker. tomcat130.host = 192.168.152.130Worker. tomcat130.type = ajp13Worker. tomcat130.lbfactor = 1Worker. controller. type = lbWorker. controller. balance_workers = tomcat129, tomcat130Worker. c

/webapps/testapp/index.jspsetting the Tomcat environment variable[Email protected] tomcat]# Vim/etc/profile.d/tomcat.shexport Catalina_home=/usr/local/tomcatexport PATH= $CATALINA _Home/bin: $PATH [[email protected] tomcat]#. /etc/profile.d/tomcat.shSetup Complete Start Service[[email protected] tomcat]# catalina.sh startaccess to the TestApp application is normal650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/6E/B3/wKiom1WC-dzTJ1AvAAC2EP4IqPY563.jpg "/>Tomcat-02DeploymentIn addition

;; *) Echo "Usage: $ start|stop}" ;; Esac 2.1.3 LVS Process Monitoring Recovery script#!/bin/bashrs_1=192.168.136.129rs_2=192.168.136.130vip=192.168.136.127. /etc/init.d/functionsWeb_result () {rs=curl -I -s $1 |awk ‘NR==1 {print $2}‘Return $rs}Lvs_result () {rs=ipvsadm -ln |grep $1:80 |wc -lReturn $rs}Auto_lvs () {Web_result $A=$?Lvs_result $B=$?If [$a-ne] [$b-ge 1]ThenIpvsadm-d-T $VIP: 80-r $Action "Kill"/bin/trueFiIf [$a-eq] [$b-lt 1]ThenIpvsadm-a-T $VIP: 80-r $1-g-W 1Action "add $"/bin

Build a Server Load balancer cluster with LVS in Linux Common open-source load balancing software: nginx, lvs, and keepalivedCommercial Hardware load equipment: F5, Netscale1. Introduction to LB and LVSLB clusters are short for load balance clusters.

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Article Title: about dual-connection server load balancer. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Save everyone's time. First, let's talk about the theme: 　　 Packet-level TCP/UDP load balancing and NAT (Network Addres

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First, the problems encounteredWhen we deploy a Web application with an IIS server, when many users have high concurrent access, the client responds very slowly and the customer experience is poor, because when IIS accepts a client request, it creates a thread that consumes large memory when the thread reaches thousands of. At the same time, because these threads are switching, the CPU usage is also high, which makes IIS more difficult to perform. So how do we solve this problem? Second, how t

Apache HTTP Server is selected as the front-end Server Load balancer, and two Tomcat clusters are selected at the backend. The selected configuration method is session sticky (sticky session ), this method forwards requests from the same user to a specific Tomcat server to avoid session replication in the cluster. The disadvantage is that the user only communicates with one server, if the server is down, it

1) Open the "httpd.conf" file in the "/usr/local/apache2/conf" directory and add the following configuration item at the end of the file, as shown in Figure 4-2-1. Proxyrequests OFF proxypass/balancer://mycluster/ Balancermember ajp://localhost:10009 ROUTE=TOMCAT1 Balancermember ajp://localhost:20009 ROUTE=TOMCAT2 Figure 4-2-1 Description: Where "Mycluster" is the name of the cluster, "ajp://localhost:10009 ROUTE=TOMCAT1" corresponds to the Tc6_a in