Upstream Blocks and Backend Servers
1 min read
- Authors
- Name
- Vijaykumar Rajendran
- @vijayrajendran_
Table of Contents
Upstream Blocks
What are Upstream Blocks?
Upstream blocks define a pool of backend servers that can be referenced by proxy_pass directives.
Basic Upstream
upstream backend {
server backend1:8080;
server backend2:8080;
server backend3:8080;
}
server {
location / {
proxy_pass http://backend;
}
}
With Server Weights
Route more traffic to powerful servers:
upstream backend {
server backend1:8080 weight=5; # 5x traffic
server backend2:8080 weight=2; # 2x traffic
server backend3:8080 weight=1; # 1x traffic
}
Backup Servers
Use backup when all primary servers are down:
upstream backend {
server primary1:8080;
server primary2:8080;
server backup:8080 backup;
}
Backend pools configured!