free load balancer linux

Identification of Layer7 data streams (Connection Tracking) in Linux Streaming Server Load balancer 1. nf_conntrack supporting Layer7 is really unnecessary After the fire, you will feel the need to quickly change "data streams based on quintuple" to "data streams with fixed offset based on the application layer protocol". The sooner the better! Therefore, this pe

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

Http://tcsrvs;}Use NGINX-T to check the configuration file for errors.[Email protected] nginx]# nginx-tNginx:the configuration file/etc/nginx/nginx.conf syntax is OKNginx:configuration file/etc/nginx/nginx.conf Test is successful[Email protected] nginx]#Then the browser verification: a refresh to jump to the other two up, indicating that the test was successful.650) this.width=650; "Src=" https://s3.51cto.com/wyfs02/M00/A3/3B/wKioL1mj7c_Tb7AeAABDYdw0gtE085.jpg-wh_500x0-wm_ 3-wmp_4-s_1794468385.

Add the following to the Nginx configuration file "/etc/nginx/nginx.conf" http node:such as domain name: admin.wxh.com load to two servershttp{//... Omit this line above other configuration content upstreamadmin.wxh.com{ server10.0.0.11:9000weight=1;server 10.0.0.11:8000weight=3;}server{ listen80; server_nameadmin.wxh.com;location/ {proxy_pass http://admin.mewxh.com; proxy_set_headerHost $host; proxy_set_headerx-real-ip $remote _addr; proxy_set_heade

Load BalancerIpvs:http://kb.linuxvirtualserver.org/wiki/ipvsNat:http://kb.linuxvirtualserver.org/wiki/lvs/natVip:http://kb.linuxvirtualserver.org/wiki/vipArp:http://kb.linuxvirtualserver.org/wiki/arp_issues_in_lvs/dr_and_lvs/tun_clustersTun:http://kb.linuxvirtualserver.org/wiki/lvs/tunHttp://www.linuxvirtualserver.org/VS-IPTunneling.htmlDr:http://kb.linuxvirtualserver.org/wiki/lvs/drHttp://www.linuxvirtualserver.org/VS-DRouting.htmlFnat:[Network] Ipvs

/arp_ignoreecho 0 >/proc/sys/net/ipv4/conf/lo/arp_announceecho 0 >/proc/sys/net/ipv4/conf/all/arp_ignoreecho 0 >/proc/sys/net/ipv4/conf/all/arp_announce;;Status# Status of Lvs-dr Real server.Islothere= '/sbin/ifconfig lo:0 | grep $VIP 'Isrothere= ' Netstat-rn | grep "lo:0" | grep $VIP 'if [! "$islothere"-O! "Isrothere"];then# either the route or the lo:0 device# not found.echo "LVS-DR Real server Stopped."Elseecho "LVS-DR Real server Running."Fi;;*)# Invalid entry.echo "$0:usage: $ {start|status

, 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

Haproxy configuration for Server Load balancer and haproxy configuration for Server Load balancerCommon Open-Source Software load balancers include Nginx, LVS, and Haproxy. Comparison of three major software load balancers (LVS Nginx VS Haproxy) I. LVS:1. Strong

be enabled. I use the linux source code to compile apache, mod_proxy.so and mod_proxy_http.so are already included, and other versions of apache should also exist. If not, install the library file separately. ############# Mod_proxy.so ##############LoadModule proxy_module modules/mod_proxy.so# LoadModule proxy_connect_module modules/mod_proxy_connect.so# LoadModule proxy_ftp_module modules/mod_proxy_ftp.so############# Mod_proxy_http.so ############

Nginx Server Load balancer transmits the parameter method to the backend (the backend is also an nginx server), and nginx Server Load balancer A website uses nginx for load balancing and multiple nginx servers at the backend. Encountered a problem, when it is used as SSL sup

capability. However, some data shows that most vswitches no longer have a layer-4 switching capability at such a high speed, only layer-3 or layer-2 exchange is supported. 　 However, for most sites, the current load balancing mainly solves the bottleneck of the Web server's processing capability, rather than the network transmission capability. The total Internet connection bandwidth of many sites is less than 10 MB, only a few sites can have high-sp

lot of practical, in addition to the solutions provided by some vendors, A more effective way is to use free software to complete this task. This includes the NAT Implementation Method in the Linux virtual server project, or the revised version of natd under FreeBSD. Generally speaking, this software method is used to implement address translation. The bandwidth limit of the central server

E-commerce Web site technology architecture with over 1 million visits The first introduction to E-commerce Web site high-performance, highly available solutions. From the frame composition of the scheme, the application is lvs+keepalived load balance. Achieve high-performance, highly available solutions (server clusters, load Balancing, high-performance, highly available, highly scalable server cluster)

Founded by Dr. Zhangwensong in May 1998, the Linux Virtual Server Project is one of the earliest free software projects in China. Linux Virtual Server proposes a load balancing scheduling solution based on IP layer and content request distribution based on the requirements of highly scalable and highly available networ

. Therefore, it is not required for small network services for the time being; in addition, it is similar to Nginx/LVS/HAProxy's Linux-based open-source free server load balancer software, which is implemented at the software level, so the cost is very low. Currently, the website architecture is generally reasonable an

PS: nginx/LVS/haproxy is currently the most widely used three load balancing software. I have implemented these software in multiple projects. I have referenced some materials and combined some of my experience in using it, to sum up. Generally, Server Load balancer uses different technologies at different stages as the website scale increases. Specific Applica

. If you have enough funds, you can use up to 100,001 hardware devices. If you already have a technical team, use nginx/haproxy + keepalived to build your own front-end. Balanced methods are flexible, with random, weight, ip, and url options.4. Synchronization depends on what to synchronize. Common files can be synchronized in real time. However, if the database is used, you must select the synchronization mode for the specific type.5. the backend application servers and database clusters should

there is no need to use The other is Linux-based, open-source, free load balancing software similar to Nginx/lvs/haproxy, which is implemented at the software level, so it's very inexpensive.At present, the structure of the Web site architecture is generally more reasonable: the Web front-end uses nginx/haproxy+keepalived as the

there is a machine down, it is only one of the db n one of the data can not access it, which we can accept, at least more than before the segmentation of the situation is much better, not the entire DB can not access. In general applications, such machine failure caused by the data is not accessible is acceptable, assuming our system is a high-concurrency e-commerce site? The economic losses caused by single-node machine outages are very serious. In other words, there is still a problem with ou

The current development trend of the website for the use of network load balancing is as the scale of the website increases according to different stages to use different technologies:One is through hardware. Common Hardware includes expensive NetScaler, F5, radware, array, and other commercial load balancers, it has the advantage of a professional maintenance team to maintain these services. The disadvanta