76 lines
2.4 KiB
Markdown
76 lines
2.4 KiB
Markdown
## Compose sample application
|
|
### Go server with an Nginx proxy and a Postgres database
|
|
|
|
Project structure:
|
|
```
|
|
.
|
|
├── backend
|
|
│ ├── Dockerfile
|
|
│ ├── go.mod
|
|
│ └── main.go
|
|
├── db
|
|
│ └── password.txt
|
|
├── compose.yaml
|
|
├── proxy
|
|
│ ├── conf
|
|
│ └── Dockerfile
|
|
└── README.md
|
|
```
|
|
|
|
[_compose.yaml_](compose.yaml)
|
|
```
|
|
services:
|
|
backend:
|
|
build: backend
|
|
...
|
|
db:
|
|
image: postgres
|
|
...
|
|
proxy:
|
|
build: proxy
|
|
ports:
|
|
- 80:80
|
|
...
|
|
```
|
|
The compose file defines an application with three services `proxy`, `backend` and `db`.
|
|
When deploying the application, docker compose maps port 80 of the proxy service container to port 80 of the host as specified in the file.
|
|
Make sure port 80 on the host is not already being in use.
|
|
|
|
## Deploy with docker compose
|
|
|
|
```
|
|
$ docker compose up -d
|
|
Creating network "nginx-golang-postgres_default" with the default driver
|
|
Pulling db (postgres:)...
|
|
latest: Pulling from library/postgres
|
|
...
|
|
Successfully built 5f7c899f9b49
|
|
Successfully tagged nginx-golang-postgres_proxy:latest
|
|
WARNING: Image for service proxy was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
|
|
Creating nginx-golang-postgres_db_1 ... done
|
|
Creating nginx-golang-postgres_backend_1 ... done
|
|
Creating nginx-golang-postgres_proxy_1 ... done
|
|
```
|
|
|
|
## Expected result
|
|
|
|
Listing containers must show three containers running and the port mapping as below:
|
|
```
|
|
$ docker ps
|
|
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
|
|
5e3ecd0289c0 nginx-golang-postgres_proxy "nginx -g 'daemon of…" 48 seconds ago Up 48 seconds 0.0.0.0:80->80/tcp nginx-golang-postgres_proxy_1
|
|
ffa1410b1c8a nginx-golang-postgres_backend "/server" 49 seconds ago Up 48 seconds 8000/tcp nginx-golang-postgres_backend_1
|
|
e63be7db7cbc postgres "docker-entrypoint.s…" 49 seconds ago Up 49 seconds 5432/tcp nginx-golang-postgres_db_1
|
|
```
|
|
|
|
After the application starts, navigate to `http://localhost:80` in your web browser or run:
|
|
```
|
|
$ curl localhost:80
|
|
["Blog post #0","Blog post #1","Blog post #2","Blog post #3","Blog post #4"]
|
|
```
|
|
|
|
Stop and remove the containers
|
|
```
|
|
$ docker compose down
|
|
```
|