Nginx's Httpupstreammodule provides simple load balancing for back-end (backend) servers. One of the simplest upstream is written as follows:Server backend1.example.com;Server backend2.example.com;server.backend3.example.com;Location/{Proxy_pass Http://backend;}1, back-end serverThe backend server can be set by upstream, which can be specified by IP address and port, domain name, UNIX socket (socket). Where
If Nginx does not only have to proxy a server, it is not as hot as today, Nginx can be configured to proxy multiple servers, when a server down, can still keep the system available. The specific configuration process is as follows:1. Under the HTTP node, add the upstream node.Upstream LINUXIDC {Server 10.0.6.108:7080;Server 10.0.0.85:8980;}2. Configure the Proxy_pass in the location node under the server node to be://+
First describe the environment, the previous load balancer is forwarded to the Nginx,nginx and then forwarded to the backend application server.The Nginx configuration file is as follows:Upstream Ads {Server ap1:8888 Max_fails=1 fail_timeout=60s;Server ap2:8888 Max_fails=1 fail_timeout=60s;}The phenomena that occur are:A log that resembles *379803415 no live upstreams while connecting to upstream is recorded every two minutes.In addition, there is a l
Nginx of Upstream modules and Proxy simple application of modulesnginx in web service is a powerful tool that can do static Span style= "FONT-FAMILY:CALIBRI;" >web service, of course its most common function is its load balancer, the following is just the application nginx upstream module and proxy module to do a little experiment. The function shown here is just the tip of the iceberg. upst
If Nginx does not only have to proxy a server, it is not as hot as today, Nginx can be configured to proxy multiple servers, when a server down, can still keep the system available. The specific configuration process is as follows:1. Under the HTTP node, add the upstream node.Upstream Favtomcat {server 10.0.6.108:7080; Server 10.0.0.85:8980;}2. Configure the Proxy_pass in the location node under the server node to be://+
Transferred from: http://onlyzq.blog.51cto.com/1228/557848
1. Polling (default)
Each request is assigned to a different back-end server in chronological order, and can be automatically rejected if the backend server is down.
2, WeightSpecifies the polling probability, proportional to the weight and access ratios, for situations where the performance of the backend server is uneven.For example:
Upstream Bakend {Server 192.168.159.10 weight=10;S
The upstream module in Nginx implements load balancing of PHP server upstream module introductionNginx load balancing function relies on the Ngx_http_upstream_module module, the supported proxy methods include Proxy_pass, Fastcgi_pass, Memcached_pass. Upstream is nginx as the core structure of proxy and cache and requests ups
: This article mainly introduces the nginx Reverse proxy-upstream module. if you are interested in the PHP Tutorial, refer to it. 1. nginx server load balancer depends on the ngx_http_upstream_module module and supports the following proxy modes:
Proxy_pass: generally used for reverse proxy
Fastcgi_pass: generally used for interaction with dynamic files, php, etc.
Memcached_pass:
2. writing the upstream
1. Round Robin (default)Each request is distributed to different backend servers one by one in chronological order. If the backend servers are down, they can be removed automatically.2. WeightSpecify the round-robin probability. weight is proportional to the access ratio, which is used when the backend server performance is uneven.For example:
Upstream bakend {
Server 192.168.1.10 Weight = 10;
Server 192.168.1.11 Weight = 10;
}
3. ip_hashEach r
"Pusch (1)-type1 frequency hopping" mentioned why to use the Pusch hopping frequency, as well as detailed introduction of the TYPE1 mode of frequency hopping, this article continues this topic, introduces the TYPE2 mode of frequency hopping.1. Problems needing attention when using Pusch frequency hoppingIn the upstream sub-frame, the PUCCH channel is at the high and low sides of the bandwidth, or at the edge of the band, and the Pusch channel is in th
module obtains the configuration of the upstream module, sets the Peer.init_upstream as the function Ngx_http_upstream_init_consistent_hash, which is used to initialize the upstream, ngx_http _upstream_init_consistent_hash (ngx_conf_t *CF,The function computes a consistent hash based on the IP and port number of the server,ngx_int_tNgx_http_upstream_init_consistent_hash (ngx_conf_t *CF,ngx_http_upstream_sr
#!/bin/SH###################################################### name:create_nginx_conf.SH# VERSION:V1.0# Author: OPS Rookie # Description: Creating Nginx-related Profiles # Create Date: .- --Geneva# Email: ######################################################Env. sh File Content format:10.10.2.6=basics-price-Service; #function_name: The method to invoke Function_name=$1#ns_type: Project Environment name Ns_type=$2#env_file:Env. sh file specific path Env_file_path=$3#判断env. SH is presentfunction
Currently there is a scenario where client A to Server B goes to get an HTTP request, in between a firewall, the firewall to monitor the GET request, if the discovery will be truncated.Here are 2 requirements:1, client A If the packet caught, found that the server is the IP of b2, the server side if turn, found that the connection is client a3, if there is a transit server, can not withstand too much pressureAs a result, a cannot use the normal VPN service to reach B, because after the normal VP
1. Polling (default)
Each request is assigned to a different back-end server in chronological order, and can be automatically removed if the backend server is down.
2, Weight
Specifies the polling probability, proportional to the weight and the access ratio, for the performance of the backend server.
For example:
Copy Code code as follows:
Upstream Backend {
Server 192.168.0.14 weight=10;
Server 192.168.0.15 weight=10;
}
Currently, nginx upstream supports four allocation methods.
1. Round Robin (default)
Each request is distributed to different backend servers one by one in chronological order. If the backend servers are down, they can be removed automatically.
2. weightSpecify the round-robin probability. weight is proportional to the access ratio, which is used when the backend server performance is uneven.For example:Upstream bakend {Server 192.168.0.14 weight = 10
Environment IntroductionServer: centos6.5Service: Nginx ProxyProblem Description:The development environment project of the pressure measurement development colleague It's okay, but the line machine hit%50, a lot of 502Some PHP pages do not open, the page prompts the gateway timeout, and then find the log prompt as follows2015/09/19 14:00:30 [ERROR] 1811#0: *319 upstream timed out (110:connection timed off) While reading response headers from
The 1.nginx load balancer relies on the Ngx_http_upstream_module module, which supports the following proxy modes:
Proxy_pass: Typically used for reverse proxies
Fastcgi_pass: Generally used for interacting with dynamic files, PHP, etc.
Memcached_pass:
2.upstream Module Authoring
Upsrtream Module Name {
Server abc.example.com weight=5;
Can be connected to the domain name or IP, if not the port number by default is 80,weight is the weight, the
ZOJ--2314 -- Reactor Cooling [non-source sink upstream and downstream feasible stream], reactor
Link:Http://acm.zju.edu.cn/onlinejudge/showProblem.do? ProblemId = 1314
Question:A terrorist organization wants to build a nuclear reactor. They need to design a cooling system, and n points are connected by m tubes. To make the liquid flow cyclically, the total inflow volume of each node must be equal to the total outflow volume, we will tell you the minim
1. Round Robin (default)
Each request is distributed to different backend servers one by one in chronological order. If the backend servers are down, they can be removed automatically.
2. weight Specify the round-robin probability. weight is proportional to the access ratio, which is used when the backend server performance is uneven.For example:Copy codeThe Code is as follows: upstream backend {Server 192.168.0.14 weight = 10;Server 192.168.0.15 wei
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