Mode (Direct Routing)
In Dr Mode, after the client's request packet reaches the virtual service IP port of the load balancer, the load balancer does not overwrite the IP and port of the request packet, but overwrites the MAC
As a Linux/Unix system engineer, I have been involved in external projects over the past few years. I have worked on the architectures of many small and medium-sized websites. F5, LVS, and nginx have many contacts, I want to explain to you what Server Load balancer is and what is a Linux cluster in a simple and easy-to-understand tone, to help you get out of this misunderstanding and understand them in the
address: Http://client.com/consumer/dept/list. This time with the Ribbon and Eureka after the integration of the user no longer pay attention to the specific Rest service address and port number, all the information is obtained through Eureka complete.2.2. Ribbon Load BalancingThe above code shows that there is a load-balanced annotation in the Ribbon: @LoadBalanced, it means that
Detailed description of LVS Server Load balancer cluster service establishment
I. LVS Overview
1. LVS: Linux Virtual Server
Layer-4 Switching (Routing): forwards request packets to a server in the backend host Cluster Based on the target IP address and target PORT (based on Scheduling Algorithm );
Load Balancing at the
-RCV-hop-for-Resp
!
SLB virtual-server DNS-dianxin 192.168.10.16
Extended-Stats
Port 53 UDP
Gslb-enable
Use-RCV-hop-for-Resp
!
SLB virtual-server dns_liw.g 192.168.10.18
Extended-Stats
Port 53 UDP
Gslb-enable
Use-RCV-hop-for-Resp
In a multi-link environment, enable the source/output function in port53 UDP.
Use-RCV-hop-for-resplserver mode vs. proxymode
Load service-group in port 53 UDP is the proxy mode, while loa
just a load balancer software, simply from the efficiency of haproxy will be better than nginx load balancing speed, in concurrent processing is better than nginx.4, Haproxy support the TCP protocol load-balanced forwarding, MySQL read load Balancing, the backend of the MyS
Load BalancingMainstream open source software: LVS, keepalived, Haproxy, Nginx and so on;OSI Layer: LVS (4), Nginx (7), Haproxy (4, 7);The Keepalived load balancing function is actually the LVSLVS Load balancer can distribute other ports than 80, such as MySQL, while Nginx only supports HTTP, https, mail;LVS Introducti
Windows Azure Platform Family of articles CatalogNote: If Azure is facing a customer that is only an enterprise customer, an enterprise customer accessing the Internet with a NAT device, because multiple clients use the same source IP address, can cause a single server to be under a lot of stress.This feature has been out for some time, the author here to do a little note. Readers familiar with the Azure platform know that the rules for Azure
Nginx/lvs/haproxy is currently the most widely used three load balancing software, the general use of load balancing with the increase in the size of the site according to different stages of the use of different technologies, specific application needs to be specific analysis. if it is a small and medium-sized Web application, such as the day PV less than 10 million, with Nginx can be completely, if a lot
, website access is not affected. In this way, the whole site will not be dragged down due to the downtime of a server in server load balancer mode.
What should I do if I want to configure server load balancer for B .com?It's easy, just like setting a.com. As follows:
Assume that the master server
Ningx acts as a Load balancer and is also a reverse proxy server. The configuration syntax is quite simple. It can be used to balance the backend servers by round robin, IP_hash, url_hash, weight, and other methods, it also supports backend server health check. In addition, it has advantages over LVS because it is based on Layer 7 Server Load
:
Worker. loadbalancer. type = lb
Each type has different actions, which will be described below.
3. set Worker attributes:
After defining a worker, you also need to provide the attributes of each worker. the following methods are used to define these attributes:
Worker ..
=
3-1 ajp12 type Worker attribute :.
When ajp12 type worker is working, the ajpv12 protocol based on TCP/IP socket is forwarded to the Tomcat worker "out-of-process.
The
) Automatic creation of new arm NIC NICs leiarmweb01953(3) Create a new network Security GROUP:LEIARMWEB01-NSG(4) Create a new high-availability set: Web-avbset In the second part, we quickly create a 2nd Azure VM named LEIARMWEB02. Remember to set availability set, Remember to set availability set, and remember to set availability. After creating the 2nd Azure VM, create a new resource as follows:(1) Create a new Azure virtual machine: LEIARMWEB02(2) Create a new Azure virtual machine NI
In network applications, "Server Load balancer" is no longer a new topic. From hardware to software, there are also many ways to achieve Server Load balancer. The server Load balancer discussed here does not refer to Server
applications. Local Load Balancing refers to load balancing for local Server clusters, and global Load Balancing refers to load balancing between server clusters with different network structures in different geographic locations. Local Server Load
scalability will be more powerful, and the client can be completely unaffected.In addition, the client detects the balancer and allows the customer to find the network area with the fastest response speed.As for the disadvantages, the opposite is the advantage of solution 1. Since the advantages of solution 1 are not an advantage, this disadvantage is naturally not a disadvantage. Can be ignored.
Load Bala
[Guide] load Balancing is our big traffic site to do a thing, let me introduce you to the Nginx server load Balancing configuration method, I hope that the students have the necessary help Oh. Load balancing let's take a quick look at what is load balancing, which can be sol
addresses. Therefore, the client that queries this name will get an address, in this way, different customers can access different servers to achieve load balancing.
DNS Server Load balancer is a simple and effective method, but it cannot distinguish between servers or reflect the current running status of servers. When using DNS Server
Load BalancingLoad balancing is our big traffic site to do a thing, let me introduce you to the Nginx server load Balancing configuration method, I hope to have the necessary students help OH.Let's start with a quick look at what is load balancing, which is interpreted literally to explain the average
, you can also consider suchTechnology: Use a proxy server to evenly forward requests to multiple servers to achieve load balancing.
3. address translation gateway Server Load balancer supports the address translation gateway of Server Load balancer. You can map an external
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