aws network load balancer

I. Introduction of keepalived SoftwareKeepalived is a software based on the VRRP protocol to achieve high availability, it can solve the problem of single point of failure, through the keepalived to build a highly available LVS load Balancing cluster, keepalived can also detect the running state of the background server.Ii. Introduction to the principle of VRRP protocolVRRP (Virtual Router Redundancy protocol) is a single point of failure problem for

have a short time recently, study a bitNginx , and made a simple introductory case. Brief introduction: Nginx (engine x) is a lightweight Web Server, reverse proxy server, and e-mail (imap/pop3) proxy server. The Normal mode of client Access server is direct access, with nginx Server, we can deploy the same application to different servers, the access mode is as follows: This greatly improves the concurrency capability, reduces the pressure on the server and improves the performance. Normal

.[Email protected] ~]# ipvsadm-a-t 192.168.60.200:80-r 192.168.60.132:80–g[Email protected] ~]# ipvsadm-a-t 192.168.60.200:80-r 192.168.60.144:80–gThe above two settings indicate that two new real server records are added to the virtual server 192.168.60.200, two real server IPs are 192.168.60.132 and 192.168, respectively. 60.144, Parameter "-G" Specifies that the operating mode of the virtual server is the direct route mode, which is the DR mode.After this is set up, when the user accesses the

192.168.60.132:80–g[Email protected] ~]# ipvsadm-a-t 192.168.60.200:80-r 192.168.60.144:80–gThe above two settings indicate that two new real server records are added to the virtual server 192.168.60.200, two real server IPs are 192.168.60.132 and 192.168, respectively. 60.144, Parameter "-G" Specifies that the operating mode of the virtual server is the direct route mode, which is the DR mode.After this is set up, when the user accesses the 192.168.60.200 80 service, LVS assigns the request to

Record Server Load balancer web Service requests based on DNS As a forum site: There are two types of data to be processed:1. structured data, such as user names and user comments, can be stored in relational databases. 2. unstructured data, such as attachments uploaded by users. Stored in the file system. Forum architecture: Use two httpd servers to serve users' access requests. Use the record of DNS for c

Although the previous LVS have been configured successfully and load balanced, we found that when a real server stopped the Nginx process, the Director would still forward the request to the past, which caused some requests to be abnormal. So there needs to be a mechanism to detect the state of real server, which is keepalived. In addition to detecting the RS State, it can also detect the state of the standby director, that is, keepalived can implemen

Prepare for three virtual, all CentOS6.5 x86_64Note that the port consistency is maintained during the configuration process.Director (Eth0 192.168.1.189, VIP eth0:0: 192.168.1.18) Director 78Real Server1 (eth0 192.168.1.207, VIP lo:0:192.168.1.18) Server1 78Real Server2 (eth0 192.168.1.208, VIP lo:0:192.168.1.18) Server2 781, configure the static IP, installation test httpd (two sets of realserver to do)[email protected] ~]# Yum install-y httpd[[email protected] ~]# echo "server1_aaa111" >/var/

"/>Or we modify the dir parameter modification.650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M02/76/41/wKiom1ZN5E-BlKU9AABxyOzJQvQ126.png "title=" Image.png "alt=" Wkiom1zn5e-blku9aabxyozjqvq126.png "/>Then execute this script![Email protected] ~]# sh/usr/local/sbin/lvs_dr.shSiocaddrt:file existsAfter the implementation of the problem, it is because we have just executed, opened the eth0:0 so we have to shut down the network and then open.Co

Today, the teacher talked about the server architecture. Although simple, there are still some difficulties. We need to expand the architecture on this basis. There is data synchronization during Server Load balancer. Baidu later saw the previous generation share: Inotify + Rsync is used to implement batch synchronization and batch update of Linux Files in batches. This should be a frequent task for O M pe

, 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

automatically start the System Service) Only for the Current User, on port 8080, when startedManually (Only for the Current User to install, use port 8080, manually start) Select the first port. (check whether port 80 of the local machine is not in use) After entering the information, click "next" 5. Go to the "Setup Type" page, including Typical (installed by default) and Custom (Custom installation). select Custom and click "Next" 6. go to the Custom Setup page, click Apacche HTTP Server 2.

About haproxy Provides high availability, Server Load balancer, and proxy Based on TCP and HTTP applications, and supports Virtual Hosts. It 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 the current hardware and supports tens of thousands of concurrent connection

:229406(224.0KiB) TX Bytes:229406(224.0KiB) [Email protected] keepalived]# Ipvsadm-lnip Virtual Server version1.2.1(size=4096) Prot localaddress:port Scheduler Flags-remoteaddress:port Forward Weight activeconn inactconntcp192.168.103.100: theWRR Persistent --192.168.103.101: theRoute1 0 0-192.168.103.105: theRoute1 0 0If the NODE3 does not turn off the firewall, the ETH0:1 network card is also enabled, so be careful to shu

Abstract: This article discusses the server load balancer technology and load allocation strategies used by distributed network servers, and implements the server load balancer Gateway on FreeBSD based on

Network Load Balancing Principle and algorithm [Winmag]Author: Slhhacker1. Network Load BalancingGenerally, service nodes in a cluster can provide such information as processor load, application system load, active users, availabl

SummaryThis article mainly discusses the basic balancing algorithms and dynamic load balancing mechanisms in the network load balancing cluster system. Based on LVS, the poll algorithm is used to implement the dynamic negative feedback mechanism of the cluster. A basic dynamic balancing model is provided and analyzed. (12:22:44) ----------------------------------

Abstract: This article discusses the Server Load balancer technology and load allocation strategies used by distributed network servers, and implements the Server Load balancer gateway on FreeBSD Based on

1. IntroductionEssentially, network load balancing is an implementation of a Distributed Job Scheduling System. As the controller of network request allocation, the balancer uses a centralized or distributed policy to allocate network service requests based on the current pr

Abstract: This article discusses the Server Load balancer technology and load allocation strategies used by distributed network servers, and implements the Server Load balancer gateway on FreeBSD Based on

sharing. However, how can we achieve a reasonable traffic distribution between multiple network devices with the same function? In this case, there may be "Labor imbalance" among multiple devices. Therefore, the Server Load balancer mechanism that coordinates the "working intensity" of each device by means of the Network