I would like to run 2 jenkins server behind nginx reverse proxy, but I can not find the proper to configure it.
The config below is working fine
location /jenkins {
proxy_pass https://contoso.com/jenkins;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
If i try to change location to /jenkins_test, than it does not work anymore.
What do I wrong?
You will need two define each jenkins instance in its own server section.
Then depending on the url that you are calling on nginx, the right jenkins server will respond.
Your nginx config could have a structure like this:
http{
# application server for first jenkins instance
upstream app_servers_first_jenkins_instance {
# if jenkins is running on the same server this should be something like 127.0.0.1 ...
server https://contoso.com/jenkins;
}
# application server for secons jenkins instance
upstream app_servers_second_jenkins_instance {
server https://contoso.com/jenkins;
}
# JENKINS SERVER 1
server{
listen 80;
server_name jenkinsfirstinstance.yourdomain.com;
location / {
proxy_pass http://app_servers_first_jenkins_instance;
}
}
# JENKINS SERVER 2
server{
listen 80;
server_name jenkinssecondinstance.yourdomain.com;
location / {
proxy_pass http://app_servers_second_jenkins_instance;
}
}
} # END OF HTTP SECTION
In this example both urls will call the same jenknins endpoint (https://contoso.com/jenkins) if you want them to be different jenkins instances you will have modify this url in one of the upstream sections
If you want to run 2 servers behind the nginx proxy, that's mean you need 2 location contexts (also called "blocks").
In your configuration file which is probably located in /etc/nginx/sites-availables you should add the locations:
http{
listen 80;
location /jenkins1 {
proxy_pass http://jenkins1-local-ip-address:8000;
include /etc/nginx/proxy_params;
}
location /jenkins2 {
proxy_pass http://jenkins2-local-ip-address:8001;
include /etc/nginx/proxy_params;
}
}
One thing you schould note is that I consider that your jenkins server is in same LAN (Local Area Network) otherwise it will not make sense to habe a proxy in front because your sever is already accessible via internet.
If your jenkins servers are accessible via HTTPS you schould change http to https in a location context and edit the port number to listen 443 and some ssl certificates configurations.
Related
Suppose I want to proxy some portion of my traffic to a remote backend instead of the local listener on the server. For example:
upstream backends {
server 127.0.0.1:8080 weight=20; # local process (HTTP)
server other-remote-backend.company-internal.com:443; # remote server (HTTPS)
}
location / {
# ...other stuff...
proxy_pass http://backends;
}
In the above configuration, every 20 or so requests NGINX will try to route to http://other-remote-backend.company-internal.com:443 which is only listening for SSL.
Is there a way for the upstream to define its own protocol scheme? Right now this seems undoable without changing the local listener process to be SSL as well (which is a less than desirable change to make).
Thanks
As is the usual case, I've figured out my own problem and its quite obvious. If you're trying to accomplish the above the trick is quite simple.
First create a new NGINX Virtual Host that listens on HTTP and proxy_passes to your remote HTTPS backend like so:
/etc/nginx/sites-available/remote_proxy
upstream remote {
server other-remote-backend.company-internal.com:443;
}
server {
# other-remote-backend.company-internal.com:443;
listen 8181;
server_name my_original_server_name;
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass https://remote;
}
}
You can now use just http for your upstreams in the original configuration listening on 443:
/etc/nginx/sites-available/default
upstream backends {
server 127.0.0.1:8080 weight=20; # local process (HTTP)
server 127.0.0.1:8181 # local nginx proxying to HTTPS remote
}
location / {
# ...other stuff...
proxy_pass http://backends;
}
Now just enable your new site and restart
$ ln -s /etc/nginx/sites-available/remote_proxy /etc/nginx/sites-enabled/ && systemctl restart nginx
I'm not sure if the behavior I want is actually possible natively with nginx but here goes.
I have a server running on port 81 with the following nginx config:
CONFIGURATION OF SERVER1 NGINX
server {
listen 81;
server_name SERVER_DNS_NAME;
location /server1 {
proxy_pass http://127.0.0.1:8084/;
proxy_set_header Host $host;
}
location / {
proxy_pass http://127.0.0.1:8084;
proxy_set_header Host $host:$server_port;
}
}
I have another server running on port 82 with similar configuration. Now what'd i'd like to do is be able to visit them both from port 80 with just different uris.
For example: URL/server1 would take me to the first server, and URL/server2 would take me to the second.
CONFIGURATION OF NGINX LISTENING ON PORT 80
server {
listen SERVER_IP:80;
location /server1{
proxy_set_header Host $host;
http://SERVER_IP:81;
}
location /server2 {
proxy_pass http://SERVER_IP:82;
proxy_set_header Host $host;
}
This works fine when I go to URL/server1. I am successfully routed to the main page on server1. However as soon as I click any of the links present on the page on server1 I get a 404. This is because the site tries to go to URL/some_subdir_of_server1 (for which there is no mapping) rather than doing URL/server1/some_subdir_of_server1. Is this behavior doable? If so how?
Thanks!
Be careful with trailing slashes: in your example, you have
proxy_pass http://SERVER_IP:81/; which will set the proxy URL to root /
Consider two websites hosted on the same server: domain.com and foo.domain.com. I want to start up a monitoring panel for each site on port 5555. Each site has a separate monitoring panel so I need to use nginx to route domain.com:5555 and foo.domain.com:5555 to two different places.
Here is the configuration for foo.domain.com:
server {
listen 5555;
server_name foo.domain.com;
location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://localhost:5678;
}
}
While this works fine for foo.domain.com:5555, it is also routing domain.com:5555 to the monitoring panel. This is acting like I had defined server_name domain.com foo.domain.com, but clearly I only defined it for foo.domain.com.
The only other nginx configs on the server are for ports 80 and 443. Neither of those configs use any wildcards and explicitly use the full name.
nginx always has a default server - if you do not define a default server, it will use the first server block with a matching listen directive.
If you want to discourage this behaviour, you will need to define a catch-all server for port 5555.
For example:
server {
listen 5555 default_server;
return 444;
}
See this document for more.
I am configuring Nginx load balance with Nginx upstream module, configuration as follow:
upstream load {
server loadapi.example.com;
server loadapi.anotherdomain.com down;
}
server {
listen 80;
server_name api.example.com;
location / {
proxy_pass http://load;
# proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
server {
listen 80;
server_name loadapi.example.com;
root /disk/projects/load/loadapi;
index index.html index.htm index.shtml index.php;
...
...
error_page 404 /404.html;
}
Notice that the api.example.com and loadapi.example.com are on the same server. loadapi.anotherdomain.com is resolved to another server which provides the same service.
Everything works fine with loadapi.anotherdomain.com, which are on another server.
But when I use the loadapi.example.com as the backend, it seems that Nginx cannot handle it correctly. I can get my service up and running on loadapi.example.com. But it is not working with the upstream.(look like Nginx cannot resolve the subdomain name correctly).
any advice? thx in advance.
nginx uses the Host header to determine which server block to use to process a request.
When the request passes through the proxy_pass http://load; statement, the Host header is set to the value load by default.
To make nginx choose the server block containing the server_name loadapi.example.com; statement, it either needs to be the default_server server, or include the name load in its server_name, or set the Host header using:
proxy_set_header Host loadapi.example.com;
Of course, using upstream for load balancing means that both servers receive the same value for the Host header, and must both respond correctly to it.
See this document for more.
I have 2 servers,
The first one contains 2 websites (located in 2 separate directories):
https://example.com/site1
https://example.com/site2
The second server contains 1 website in root folder (React website).
Can you please help me to set up nginx on first server to make it point to the second server when user access to https://example.com.
Since nginx would be running in port 80, thus you need to run your web hosting content onto another port for example port 3000 from your first server.
In your nginx.config file, you would need to create an upstream where you list the server that nginx needs to re-route to: (before making changes to the file, i would recommend that you make a copy of it)
events {
worker_connections 768;
# multi_accept on;
}
upstream server_banks {
server localhost:3000; # if not localhost put the ip of the server
server second_server_ip:portNumber;
}
server { # nginx service will operate on port 80
listen 80;
server_name example.com
# it could your first server's ip or example.com if the domain is associated with that ip
location / {
proxy_pass http://server_banks;
}
}
After you save the config, reload service && restart
You need nginx running on both server2 and server2, then set nginx config as follow
On Server 1
#####server1####
server {
listen 443;
server_name example.com;
location / {
proxy_pass http://second_server_ip:80;
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
}
location /site1 {
alias /path/to_site1_dir/;
}
location /site2 {
alias /path/to_site2_dir/;
}
}
On server 2
###Server2#####
server {
listen 80;
server_name localhost;
root /path/to_site_dir_for-server2;
location / {
}
}