Nginx 负债均衡的几种方式
Nginx 负载均衡 About 2,056 words轮询
http {
upstream loadbalanceone{
server 127.0.0.1:9000;
server 127.0.0.1:10000;
}
server {
listen 8000;
location / {
proxy_pass http://loadbalanceone/;
}
}
}
权重
http {
upstream loadbalancetwo{
server 127.0.0.1:9000 weight=1;
server 127.0.0.1:10000 weight=2;
}
server {
listen 8000;
location / {
proxy_pass http://loadbalancetwo/;
}
}
}
ip_hash
根据IP
的哈希值来转发。
ip_hash
可以和weight
共用,当hash
冲突时可以在几台机器间按权重再分配。
ip_hash
不支持backup
指令。
http {
upstream loadbalancethree{
ip_hash;
server 127.0.0.1:9000 weight=1;
server 127.0.0.1:10000 weight=2;
}
server {
listen 8000;
location / {
proxy_pass http://loadbalancethree/;
}
}
}
least_conn
根据连接数来转发,转发至最少连接的那台服务器。
http {
upstream loadbalancefour{
least_conn;
server 127.0.0.1:9000 weight=1;
server 127.0.0.1:10000 weight=2;
}
server {
listen 8000;
location / {
proxy_pass http://loadbalancefour/;
}
}
}
url_hash
http {
upstream loadbalancefive{
hash $request_uri;
server 127.0.0.1:9000 weight=1;
server 127.0.0.1:10000 weight=2;
}
server {
listen 8000;
location / {
proxy_pass http://loadbalancefive/;
}
}
}
其他相关
down
、backup
、max_fails
、fail_timeout
等指令。
down
:表示当前服务不参与负载均衡。backup
:表示其他非backup
服务都down
或繁忙时,请求该服务,这个服务压力最小。max_fails
:允许请求失败的最大次数,默认为1
,当超过max_fails
将不再调度到该服务。fail_timeout
:超过max_fails
后,暂停调度到该服务的时间。
http {
upstream loadbalancesix{
server 127.0.0.1:9000 down;
server 127.0.0.1:10000 backup;
server 127.0.0.1:11000 max_fails=1 fail_timeout=60s;
}
server {
listen 8000;
location / {
proxy_pass http://loadbalancesix/;
proxy_connect_timeout 3s;
}
}
}
注意
ip_hash
不支持backup
指令。
nginx: [emerg] balancing method does not support parameter "backup" in ./conf/nginx.conf:61
Views: 2,788 · Posted: 2021-05-12
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