I would like to configure NGINX as a simple 2 ARM load balancer. This is the target scenario:
I have tried this configuration:
http {
upstream backend1 {
server 192.168.1.3;
server 192.168.1.2;
}
server {
listen 80;
location / {
proxy_pass http://backend1;
}
}
}
but it is not working. What am I doing wrong?
http block redefined in default.conf, you could just keep server block in default.conf and move upstream to http block defined in /etc/nginx/nginx.conf
Edit /etc/nginx/site-enabled/default.conf, just keep the server block
server {
listen 80;
location / {
proxy_pass http://backend1;
}
}
Edit /etc/nginx/nginx.conf, insert your upstream configure
http {
...
// insert upstream before the following two `include` commands
upstream backend1 {
server 192.168.1.3;
server 192.168.1.2;
}
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}
Restart nginx systemctl restart nginx to make your changes take effect.
Related
I have a very simple load balancing configuration, set it up for PoC purpose. My app server1 and load balancer server is same.Below is my load balncer conf file content. Please help me is this correct?
At the moment, whenever all my request goes to IP1. I expect it to route traffic to IP2 as well whenever I hit IP1, please correct if this understanding is wrong.
upstream myapp1 {
server srv1.example.com;
server srv2.example.com;
server srv3.example.com;
}
server {
listen 80;
location / {
proxy_pass http://myapp1;
}
}
Your configuration is correct. Sending multiple requests to your NGINX Proxy Port 80 will Loadbalance the traffic with the default LB-Algorithem round-robin to one of your backend (upstream) servers.
Check this out:
https://www.nginx.com/resources/wiki/start/topics/examples/loadbalanceexample/
http {
upstream myproject {
server 127.0.0.1:8080;
server 127.0.0.1:8081;
server 127.0.0.1:8082;
}
server {
listen 80;
server_name www.domain.com;
location / {
proxy_pass http://myproject;
}
}
}
You can try this from any Linux command line
for ((i=1;i<=10;i++)); do curl -v "http://localhost"; sleep 1; done
This should print AppServer1, AppServer2, AppServer3 and start again from 1.
A demo-backend could look like
server {
listen 8080;
location / {
return 200 "AppServer1\n";
}
}
server {
listen 8081;
location / {
return 200 "AppServer2\n";
}
}
server {
listen 8082;
location / {
return 200 "AppServer3\n";
}
}
I have just tested in a fresh nginx docker container without any problem.
I'm a bit new to using nginx so I'm likely missing something obvious. I'm trying to create an nginx server that will reverse proxy to a set of web servers that use https.
I've been able to get it to work with one server list this:
server {
listen $PORT;
server_name <nginx server>.herokuapp.com;
location / {
proxy_pass https://<server1>.herokuapp.com;
}
}
However, as soon I try to add in the 'upstream' configuration element it no longer works.
upstream backend {
server <server1>.herokuapp.com;
}
server {
listen $PORT;
server_name <nginx server>.herokuapp.com;
location / {
proxy_pass https://backend;
}
}
I've tried adding in 443, but that also fails.
upstream backend {
server <server1>.herokuapp.com:443;
}
server {
listen $PORT;
server_name <nginx server>.herokuapp.com;
location / {
proxy_pass https://backend;
}
}
Any ideas what I'm doing wrong here?
Why is nginx is nginx placing the upstream name in the redirected URL?
This is my nginx.conf:
worker_processes 1;
events {
worker_connections 1024;
}
http {
upstream servs {
server facebook.com;
}
server {
listen 80;
location / {
proxy_pass http://servs;
}
}
}
When I access the port 80, I get:
This site can’t be reached
servs.facebook.com’s server DNS address could not be found.
Why is it placing "servs." before facebook.com?
You are not setting the Host header in the upstream request, so nginx constructs a value from the proxy_pass directive. As you are using an upstream block, this value is the name of the upstream block, rather than the name of the server you are trying to access.
If you are using an upstream block, it may be advisable to set the Host header explicitly:
proxy_set_header Host example.com;
See this document for more.
I done congfiguration in nginx for redirection and it works successfully.
But in that i want load balancing :-
for that i already create load-balancer.conf as well as give server name into that file like :-
upstream backend {
# ip_hash;
server 1.2.3.4;
server 5.6.7.8;
}
server {
listen 80;
location / {
proxy_pass http://backend;
}
}
In both instances i did same configuration
and it default uses round-robin algorithm so in that request transfer via one pc to another pc.....
but it were not working
can any one suggest me anything that secong request going to another server 5.6.7.8
so i can check load balancing.
Thankyou so much.
Create a log file for upstream to check request is going to which server
http {
log_format upstreamlog '$server_name to: $upstream_addr {$request} '
'upstream_response_time $upstream_response_time'
' request_time $request_time';
upstream backend {
# ip_hash;
server 1.2.3.4;
server 5.6.7.8;
}
server {
listen 80;
access_log /var/log/nginx/nginx-access.log upstreamlog;
location / {
proxy_pass http://backend;
}
}
and then check your log file
sudo cat /var/log/nginx/nginx-access.log;
you will see log like
to: 5.6.7.8:80 {GET /sites/default/files/abc.png HTTP/1.1} upstream_response_time 0.171 request_time 0.171
I want to configure nginx to be a reverse proxy using upstream directive (and add there keepalive for example).
upstream my_backend {
server 127.0.0.1:3579;
}
server {
listen 80;
location / {
proxy_pass http://my_backend;
}
}
But the problem is that it returns Bad Request (Invalid host). And there is nothing in nginx error log to help me solve it.
Everything else being the same this configuration without upstream directive works as expected:
server {
listen 80;
location / {
proxy_pass http://127.0.0.1:3579;
}
}
Aren't those two equivalent? And what do I have to do to make it work with upstream?