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https://github.com/washira/docker-compose-and-nginx
Demonstration of Reverse Proxy and Load Balancer using NGINX while Docker Compose is service discovery.
https://github.com/washira/docker-compose-and-nginx
docker-compose nginx nodejs
Last synced: about 8 hours ago
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Demonstration of Reverse Proxy and Load Balancer using NGINX while Docker Compose is service discovery.
- Host: GitHub
- URL: https://github.com/washira/docker-compose-and-nginx
- Owner: Washira
- Created: 2023-09-12T14:32:30.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2023-09-12T14:35:46.000Z (about 1 year ago)
- Last Synced: 2023-09-12T23:36:57.634Z (about 1 year ago)
- Topics: docker-compose, nginx, nodejs
- Language: Dockerfile
- Homepage:
- Size: 8.79 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Configuration
## Files
- service bundles (index.js, package.json, etc)
- Dockerfile
- docker-compose.yml
## Docker Compose Commands
Initially start a instance, you may stop by `ctrl` + `c`
```
docker compose up
```
You can connect service by port which you config in the service to listen such as `3000`
## Start by Scaling Command
Before start you must
- remove `posts` from `docker-compose.yml`
- remove `container_name` from `docker-compose.yml` because `docker-compose` will config own itself
by command below
```
docker compose up --scale [service_name]=[number_of_instance_you_need]
```
exp.
```
docker compose up --scale api=5
```
Right now you get 5 instances running, but how do the external aplication know which one instance they should connect to? In this case you need using NGINX
Remove all instances with
```
docker compose down
```
You can build and run all instances to be background with this command
```
docker compose up --scale [service_name]=[number_of_instance_you_need] -d --build
```
## Reverse Proxy and Load Balancer (NGINX)
Add another service in `docker-compose.yml`
```
services:
...
nginx:
image: nginx:latest
volumes:
- ./conf.d:/etc/nginx/conf.d
depends_on:
- api_test
ports:
- 8080:4000
```
In part of
```
volumes:
- ./conf.d:/etc/nginx/conf.d
```
first `conf.d` you can change to any, it should be same as the folder which contain `nginx.conf` and the path after that (`:/etc/nginx/conf.d`) must be fixed the example
You config external port is `80` and internal to connect service is `3000`
Next, create folder `conf.d` and file `nginx.conf` inside it
config reverse proxy by type inside the file with
```
server {
listen 4000;
location / {
proxy_pass http://localhost:3000;
}
}
```
It means listening external request at port `8080` and forward to EGINX at port `4000`
Then NGINX forward to url of service at port `3000` (AKA Reverse Proxy)
You can change the ports all that you want
## Testing
Send request at port `8080`
```
http://localhost:8080
```
You may get response like
```
{"message":"Hello from 07e2ada3ef6c","hostname":"07e2ada3ef6c"}
```
And if refresh, the hostname will change
Because of `Load Balancer` takes request to all instances by round rolling