Re: basic nginx setup help as load balancer

Pratyush Kumar Wed, 06 Jul 2016 00:05:44 -0700

I'm new to servers and proxies,
But don't you think running both nginx and Apache on port 80 of same machine will cause one of those to fail to start.
In my opinion backend should be on different IP:port combination.

Please correct me if I'm wrong.

On 05-Jul-2016 21:41, "NdridCold ." <[email protected]> wrote:

I was getting a host not found problem while trying to start nginx.

nginx: [emerg] host not found in upstream "backendservers.com" in /etc/nginx/conf.d/default.conf:37

I am fairly certain that this is because there is no name resolution for "backendservers.com" in our DNS. So I changed up a few things to make it work.

But I am confused on a few concepts here. First of all, should my server name in the "upstream" directive be the same name in the "server_name" directive in the "server" stanza? Here is what I have so far:

upstream myapplication.net {
# Use ip hash for session persistance
ip_hash;
server 1.net;
server 2.net;
server 3..net;

# The below only works on nginx plus
#sticky route $route_cookie $route_uri;
}
server {

listen 80;
server_name myapplication.net;
keepalive_timeout 70;

#charset koi8-r;
#access_log /var/log/nginx/log/host.access.log main;

location / {
root /usr/share/nginx/html;
index index.html index.htm;
}

#error_page 404 /404.html;

# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}

# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
location ~ \.php$ {
proxy_pass http://myapplication.net;
proxy_http_version 1.1;
proxy_set_header Connection "";
}

# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;

# include fastcgi_params;
#}

# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}

server {

listen 443 ssl;
server_name myapplication.net;
keepalive_timeout 70;

#charset koi8-r;
#access_log /var/log/nginx/log/host.access.log main;

location / {
root /usr/share/nginx/html;
index index.html index.htm;
}

#error_page 404 /404.html;

# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}

# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
location ~ \.php$ {
proxy_pass https://myapplication.net;
proxy_http_version 1.1;
proxy_set_header Connection "";
}

# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}

# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}

So here is what I need to happen. I need nginx to asnwer requests for myapplication.net and send them to the servers "server1,net, server2.net, and server3.net". Am I accomplishing this with this config? And to recap, should my server name in the "upstream" directive be the same name in the "server_name" directive in the "server" stanza?

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Re: basic nginx setup help as load balancer

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