kemp network load balancer

distribution request, and the response packet is returned directly to the customer by RS, reducing the load balancer's massive data flow, and the load balancer is no longer a system bottleneckDisadvantage: Each machine needs a public IP, * Tunnel-tun: principle: (one IP packet is encapsulated in another IP packet, so it can cross the

Local DNS; 8. The Local DNS returns the www.qq.com resolution record to the user. Local DNS is generally provided by network operators (such as China Telecom and China Netcom. The cache DNS is between the client (this is a relative concept) and the local DNS, and uses the cache function of the DNS server software and the close-up characteristics between the cache DNS and the client to accelerate domain name resolution. You can also perform Domain Nam

NAT type of Load Balancer cluster LVS under Linux1. The cluster type is divided into 3 types:Lb:load balancing, load balancingHa:high Availability , High availabilityHp:high performance, high performanceThe 2.LB load Balancer four layer LVS type is divided into the followin

server can be added here IP192.168.5.149 or 127.0.0.1 can both represent access to themselves.Restart Nginx, and then visit a.com to see if it will be assigned to the primary server.The primary server is also able to join the service normally.At lastOne, load balancing is not nginx unique, famous dingding Apache also have, but performance may not be as nginx.Second, more than one server to provide services, but the domain name only resolves to the pr

:80;Server 127.0.0.1:8080;}Since the main server can be added here IP192.168.5.149 or 127.0.0.1 can both represent access to themselves.Restart Nginx, and then visit a.com to see if it will be assigned to the primary server.The primary server is also able to join the service normally.At lastOne, load balancing is not nginx unique, famous dingding Apache also have, but performance may not be as nginx.Second, more than one server to provide services, bu

192.168.16.16; # Charset koi8-r;Charset UTF-8;# Set access logs for the current virtual hostAccess_log logs/host. access. log main;# If you access/img/*,/js/*,/css/* resources, you can directly obtain the local document without passing squid# If there are many documents, this method is not recommended because the squid cache has better results.# Location ~ ^/(Img | js | css )/{# Root/data3/Html;# Expires 24 h;#}# Enable Server Load

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

code:Upstream A.com {Server 192.168.5.126:80;Server 192.168.5.27:80;Server 127.0.0.1:8080;}Since the main server can be added here IP192.168.5.149 or 127.0.0.1 can both represent access to themselves.Restart Nginx, and then visit a.com to see if it will be assigned to the primary server.The primary server is also able to join the service normally.At lastOne, load balancing is not nginx unique, famous dingding Apache also have, but performance may not

the main server can be added here IP192.168.5.149 or 127.0.0.1 can both represent access to themselves.Restart Nginx, and then visit a.com to see if it will be assigned to the primary server.OkThe primary server is also able to join the service normally.finallyOne, load balancing is not nginx unique, famous dingding Apache also have, but performance may not be as nginx.Second, more than one server to provide services, but the domain name only resolve

;Server 127.0.0.1:8080;}Since the main server can be added here IP192.168.5.149 or 127.0.0.1 can both represent access to themselves.Restart Nginx, and then visit a.com to see if it will be assigned to the primary server.The primary server is also able to join the service normally.At lastOne, load balancing is not nginx unique, famous dingding Apache also have, but performance may not be as nginx.Second, more than one server to provide services, but t

support: YesUse VRRP Framework: YesUse LinkWatch: NoUse Debug flags: NoMakeMake install Mkdir/etc/keepalivedLn-s/usr/local/keepalived/etc/rc. d/init. d/keepalived/etc/init. d/Ln-s/usr/local/keepalived/etc/keepalived. conf/etc/keepalived/Ln-s/usr/local/keepalived/etc/sysconfig/Ln-s/usr/local/keepalived/bin/*/bin/Ln-s/usr/local/keepalived/sbin/*/sbin/ Vi/etc/rc. localModprobe ip_vs Vi/etc/keepalived. conf ! Configuration File for keepalivedGlobal_defs {Notification_email {Root@example.com # email

In "high concurrency, massive data, distributed, nosql, cloud computing ...... I believe many of my friends have heard of and even often talked about "clusters and Server Load balancer". But not all of them have the opportunity to really come into use these technologies, not everyone really understands these technical terms. The following is a brief explanation. Cluster) A cluster is a loosely coupled mult

bindings on the RS side, do not set 0 even if the VIP bindings are stoppedif [${#VIP [@]}-le 1];thenecho "0" >/proc/sys/net/ipv4/config/lo/arp_ignoreecho "0" >/proc/sys/net/ipv4/config/lo/arp_announceecho "0" >/proc/sys/net/ipv4/config/all/arp_ignoreecho "0" >/proc/sys/net/ipv4/config/all/arp_announceFi Inspection of the service provided by the RS node itself Auxiliary exclusion Tool Tcpdump Ping Load balancing and reverse proxy clusters

server is also able to join the service normally.At lastOne, load balancing is not nginx unique, famous dingding Apache also have, but performance may not be as nginx.Second, more than one server to provide services, but the domain name only resolves to the primary server, and the real server IP will not be ping can be obtained, add a certain security.Third, the IP in the upstream is not necessarily the intranet, the external

HAProxy for Server Load balancer HAProxy provides high availability, Server Load balancer, and TCP and HTTP application-based proxy. It supports Virtual Hosts and is a free, fast, and reliable solution. HAProxy is especially suitable for websites with extremely high loads, which usually require session persistence or l

This article tries to explain the operation steps and simple configuration of using keepalived + Nginx + Tomcat to build a high-availability load balancing environment in Ubuntu Server environment, which does not involve performance tuning. Let's talk about their respective roles: tomcat– Application Server nginx– reverse proxy server, as a load balancer