Put two nginx series - docker

Question

Is there a way to put two NGINX server in series?
In my configuration, I have multiple docker-compose instances of containers, which all run the same web applications. In additions, I have two NGINX. The NGINX1 server is located on my physical machine, and the other NGINX server (NGINX2) is located inside a docker-compose container.
Is there a way, connecting to the NGINX1 server, to automatically reach the APP1 application (which is inside a container) passing through the second NGINX (NGINX2, which, also, is internal to the container) by simply typing in a browser the link "mydomain.com/app1"?
I know that a more simple solution would be to point directly the docker-compose container to the external NGINX, but could I apply the scenario described instead?
For better understanding, I made a simple images showing my architecture.
image showing the architecture of the project
Here is my NGINX1 config file:
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
#tcp_nopush on;
keepalive_timeout 9999;
server {
listen 80;
server_name client1.nginx.loc;
access_log logs/nginx_client_loc-access.log;
error_log logs/nginx_client_loc-error.log;
location /loki{
#proxy_http_version 1.1;
#proxy_set_header Upgrade $http_upgrade;
#proxy_set_header Connection "Upgrade";
#proxy_set_header Host $http_host;
proxy_pass http://172.29.161.227:3100;
}
#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 html;
}
}
And here there is the second NGINX config (NGNX2, internal to the container)
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 99999;
server {
listen 80;
server_name localhost 127.0.0.1;
resolver 127.0.0.11;
location /APP1 {
proxy_pass http://APP1/content;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_read_timeout 300;
proxy_connect_timeout 300;
proxy_send_timeout 300;
}
location /App2 {
include /etc/nginx/mime.types;
proxy_pass http://APP2/targets;
proxy_set_header X-Forwarded-For $remote_addr;
}
Thanks so much

Answer 1

If I understood correctly you want NGINX1 to pass into NGINX2 which would pass the packet onward to APP1?
In this case, the solution is rather straight-forward:
Config NGINX1 to send the packet into a specific port, e.g. port 777. Then, add an NGINX2 listener which would listen on port 777 and send it away.
NGINX1:
http {
...
server {
listen 80;
...
location /loki{
#proxy_http_version 1.1;
#proxy_set_header Upgrade $http_upgrade;
#proxy_set_header Connection "Upgrade";
#proxy_set_header Host $http_host;
proxy_pass http://172.29.161.227:3100;
}
location /APP1 {
proxy_pass <URL for NGINX2>:777;
proxy_read_timeout 300;
proxy_connect_timeout 300;
proxy_send_timeout 300;
}
#error_page 404 /404.html;
...
}
NGINX2:
http {
include mime.types;
...
server {
listen 80;
...
}
server {
listen 777;
server_name localhost 127.0.0.1;
resolver 127.0.0.11;
location /APP1 {
proxy_pass http://APP1/content;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_read_timeout 300;
proxy_connect_timeout 300;
proxy_send_timeout 300;
}
}
...
This way a packet that arrives to /APP1 is forwarded by NGINX1 into port 777 of NGINX2 which in-turn forwards it into the APP1 content.
Also, if you could next time include ports on your architecture diagram, thsi would make it clearer to understand packet-movement.
Hopes this helps.