My application is divided into a backend and frontend docker container which are running in digital ocean server. I purchased a domain and inserted the routes provided from digital ocean into my namecheap DNS. I am using nginx server block to route my frontend to the server and would like it to communicate to my backend docker container. I am currently watching this tutorial from faraday.
My frontend container is running on localhost:3000 and my backend is running on localhost:5000;
And i've set the ports to run when the location is server_name/ . How will my nginx server block know whether it's loading the frontend or backend to the domain since both are expected to run proxy_pass at location /?
I want to display the front onto server_name provided but still able to access my backend
server{
server_name newlife.life;
access_log /var/log/nginx/st-access.log
error_log /var/log/nginx/st-error.log debug
location / {
proxy_pass http://localhost:3000;
}
location / {
proxy_pass http://localhost:5000;
}
}
Your frontend can make the backend calls on a different subpath. These requests will arrive at nginx and then nginx can proxy them to backend by rewriting the URL using the http_rewrite module.
See https://nginx.org/en/docs/http/ngx_http_rewrite_module.html
Example:
location /backend {
proxy_pass localhost:5000;
rewrite ^/backend/(.*) /$1 break;
}
Related
I deployed an nginx:1.22.1 instance alongside a static react app server on a worker node in a docker swarm. This is docker swarm mode, not classic swarm.
The advertise address that I listed when joining the swarm is internal to the data center, I do not know if that matters because I can still access these services with the public addresses.
Both containers are pinned to the same worker node and communicate over a user-created overlay network.
I can retrieve the full bundle directly from the react app server over the public network.
I cannot retrieve the full bundle through the nginx reverse-proxy server over the public network.
When I attempt to fetch the bundle using chrome browser as the user-agent I get 2 errors:
net::ERR_INCOMPLETE_CHUNKED_ENCODING 200 (OK).
The app bundle is cutoff mid js function as if a chunk of data was not transmitted.
Rarely, the upstream server will send html and not a js bundle. But I receive that whole response body and it is not truncated like the js bundle.
I have played with all kinds of configuration and cannot get it to work.
(most relevant)
This is my configuration under /etc/nginx/conf.d/default.conf
resolver 127.0.0.11 valid=10s;
error_log /dev/stdout info;
map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}
server {
listen 80;
return 301 https://$host$request_uri;
}
server {
listen 443 ssl;
ssl_certificate /etc/nginx/certs/nginx.pem;
ssl_certificate_key /etc/nginx/certs/key.pem;
client_max_body_size 100M;
proxy_buffers 8 1024k;
proxy_buffer_size 1024k;
proxy_max_temp_file_size 1024m;
location / {
set $reactapp reacthost;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://$reactapp:3000/;
proxy_redirect off;
}
root /usr/share/nginx/html;
}
error_page 500 502 503 504 /50x.html;
}
I use the variable $reactapp for service discovery after nginx server start. See NGINX blog here.
Note that the nginx:1.22.1 instance runs with user nginx after it is deployed to the stack. I only see this below message when I deploy via docker stack. If I start the container directly using docker engine, I do not see it.
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: can not modify /etc/nginx/conf.d/default.conf (read-only file system?)
However, I can exec into the container as the nginx user, access /var/cache/nginx/, and create a directory.
I do not know if:
my server / location configuration is plain bad.
The NGINX server cannot write a part of the container it needs to write when the service is deployed in stack mode.
If I cannot access the server properly over the public network via the overlay network.
Prior to using docker stack I was able to use this reverse proxy.
The two containers were on the same host without swarm mode running.
The containers communicated over a bridge network.
The reverse proxy server port was published on the public interface of the server it was deployed on.
The NGINX server started after the upstream server.
Because there is no depends_on key honored in stack mode I have to allow DNS service discovery after the NGINX server starts up. Placing them on an overlay gives me more flexibility in how I do my deployments, but this has become a bit muddled. There are enough differences between the two environments that it has become difficult to get the stack to behave as I expect.
recently I'm trying to set up a litte Home Server with a buildin DNS.
The DNS Service is given by lancacheDNS and set up in combination with a Monolithic-Cache (Port 1234) in two docker containers on 192.168.178.11 (Host machine) in my local network.
Since I want to serve a Website(Port 8080) along with some independent APIs (Ports 8081, 8082 or whatsoever) I decided to use Nginx as a reverse Proxy.
The DNS does the following:
getr.me --> 192.168.178.11
The routing works completely fine and getr.me:8080 gives me my website as expected.
Now the tricky part (for me);
Set up Nginx such that:
website.getr.me --> serving website
api1.getr.me --> serving the API1
api2.getr.me --> serving the API2
For that I created a Newtwork "default_dash_nginx".
I edited the nginx to connect to that via:
networks: default: name: default_dash_nginx external: true
Also I connected my website serving container (dashboard) to the network via --network default_dash_nginx.
The serving website gets the IP 172.20.0.4 (received via docker inspect default_dash_nginx) and also the nginx server is connected to the network.
Nginx works and I can edit the admin page.
But unfortunaly event though I edited the proxyHost to the IP + Port of my website receiced from the network, the site is not available. Here the output of my network inspection: https://pastebin.com/jsuPZpqQ
I hope you have another Idea,
thanks in advance,
Maxi
Edit:
The nginx container is actually a NginxReverseProxyManager Container (I don´t know of it was unclear above or simply not important)
The Nginx container can actually Ping the website container ang also get the HTML files from Port 80 from it.
So it seems like the nginx itself isn´t working like it should.
The first answer got no results( I tried to save it as every of the mentioned files
here
Do I have missed something or am I just not smart enough?
nginx config, try and understand
server {
listen 80;
server_name api1.getr.me;
location / {
proxy_pass http://localhost:8081;
}
}
server {
listen 80;
server_name api2.getr.me;
location / {
proxy_pass http://localhost:8082;
}
}
server {
listen 80;
server_name some.getr.me;
location / {
proxy_pass http://localhost:XXXX;
}
}
I have an application running on port 4343. This is a single page app, so hitting http://myApp:4343 will dynamically redirect me to somewhere like http://myApp:4343/#/pageOne.
Both the nginx container and the myApp container are running on the same docker network so can resolve via container name.
I'm trying to proxy this via nginx with:
server {
listen 80;
server_name localhost;
location /myApp {
proxy_pass http://myApp:4343
}
}
How do I wildcard the rule?
I have a docker compose file with 2 services: joomla and phpmyadmin.
I need a reverse proxy which behaves like below:
path: / --> joomla service
path: /managedb --> phpmyadmin service
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://joomla;
}
location /managedb {
proxy_pass http://phpmyadmin;
}
}
Everthing works well, however I'd need to add load balancing to balance work between my 3 machines in docker swarm.
They all are VM on the same LAN with static IP 192.168.75.11/12/13.
The Nginx way to add load balancing should be the follow:
upstream joomla_app {
server 192.168.75.11;
server 192.168.75.12;
server 192.168.75.13;
}
upstream phpmyadmin_app {
server 192.168.75.11;
server 192.168.75.12;
server 192.168.75.13;
}
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://joomla_app;
}
location /managedb {
proxy_pass http://phpmyadmin_app;
}
}
However, since the only exposed port is the Ngxinx 80 one because i need it as reverse proxy too, the code above is obviously not working.
So how can I add the load balancing in this scenario?
Thank you in advance!
In docker swarm, you don't need own load balancer, it has a built in one. Simply scale your services and that's all. Swarm name resolver will resolve joomla and phpmyadmin either to a virtual ip that will be a swarm lb for that service or if you configure service to work in dnsrr mode, will use a dns round-robin method when resolving servicename-hostname to container ip.
However, if you want to distribute services across nodes in swarm, that's a different thing. In this case, you can set placement restrictions for each service or set them to be "global" instead replicated - see https://docs.docker.com/engine/swarm/services/#control-service-placement
I'm trying to keep a jenkins container(docker) behind nginx reverse proxy. It works fine with this path, https://example.com/ but it returns 502 Bad Gateway when I add parameter to the path, https://example.com/jenkins.
The docker container for jenkins is run like this
docker container run -d -p 127.0.0.1:8080:8080 jenkins/jenkins
Here is my code,
server {
listen 80;
root /var/www/html;
server_name schoolcloudy.com www.schoolcloudy.com;
location / {
proxy_pass http://localhost:8000;
}
}
# Virtual Host configuration for example.com
upstream jenkins {
server 127.0.0.1:8080;
}
server {
listen 80;
server_name jenkins;
location /jenkins {
proxy_pass http://jenkins;
proxy_redirect 127.0.0.1:8080 https://schoolcloudy.com/jenkins;
}
}
Specify the Jenkins container's network with --network=host flag when you run the container. This way the container will be able to interact with host network or use the container's IP explicitly in the Nginx conf.
good practice in such questions is official documentation usage:
wiki.jenkins.io
I've configured Jenkins behind Nginx reverse proxy several time, wiki works fine for me each time.
P.S.: look like proxy_pass option value in your config should be changed to http://127.0.0.1:8080