What does upstream mean in nginx

Question

upstream app front static       server 192 168 206 105 80      Never seen it before  anyone knows  what it means

User · Answer

upstream defines a cluster that you can proxy requests to  It s commonly used for defining either a web server cluster for load balancing  or an app server cluster for routing   load balancing

User · Answer

If we have a single server we can directly include it in the proxy pass  But in case if we have many servers we use upstream to maintain the servers  Nginx will load-balance based on the incoming traffic

User · Answer

It s used for proxying requests to other servers   An example from http   wiki nginx org LoadBalanceExample is   http     upstream myproject       server 127 0 0 1 8000 weight 3      server 127 0 0 1 8001      server 127 0 0 1 8002          server 127 0 0 1 8003         server       listen 80      server name www domain com      location           proxy pass http   myproject                This means all requests for   go to the any of the servers listed under upstream XXX  with a preference for port 8000

[nginx] What does upstream mean in nginx?

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