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94 lines
2.8 KiB
Markdown
94 lines
2.8 KiB
Markdown
## Compose sample application
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### Go server with an Nginx proxy and a Postgres database
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Project structure:
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```
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.
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├── backend
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│ ├── Dockerfile
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│ ├── go.mod
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│ ├── go.sum
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│ └── main.go
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├── db
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│ └── password.txt
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├── compose.yaml
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├── proxy
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│ └── nginx.conf
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└── README.md
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```
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[_compose.yaml_](compose.yaml)
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```shell
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services:
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backend:
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build:
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context: backend
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target: builder
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...
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db:
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image: postgres
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...
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proxy:
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image: nginx
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volumes:
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- type: bind
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source: ./proxy/nginx.conf
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target: /etc/nginx/conf.d/default.conf
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read_only: true
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ports:
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- 80:80
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...
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```
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The compose file defines an application with three services `proxy`, `backend` and `db`.
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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.
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Make sure port 80 on the host is not already being in use.
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## Deploy with docker compose
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```shell
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$ docker compose up -d
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Creating network "nginx-golang-postgres_default" with the default driver
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Pulling db (postgres:)...
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latest: Pulling from library/postgres
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...
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Successfully built 5f7c899f9b49
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Successfully tagged nginx-golang-postgres_proxy:latest
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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`.
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Creating nginx-golang-postgres_db_1 ... done
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Creating nginx-golang-postgres_backend_1 ... done
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Creating nginx-golang-postgres_proxy_1 ... done
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```
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## Expected result
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Listing containers must show three containers running and the port mapping as below:
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```shell
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$ docker compose ps
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NAME COMMAND SERVICE STATUS PORTS
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nginx-golang-postgres-backend-1 "/code/bin/backend" backend running
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nginx-golang-postgres-db-1 "docker-entrypoint.s…" db running (healthy) 5432/tcp
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nginx-golang-postgres-proxy-1 "/docker-entrypoint.…" proxy running 0.0.0.0:80->80/tcp
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```
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After the application starts, navigate to `http://localhost:80` in your web browser or run:
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```shell
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$ curl localhost:80
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["Blog post #0","Blog post #1","Blog post #2","Blog post #3","Blog post #4"]
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```
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Stop and remove the containers
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```shell
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$ docker compose down
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```
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## Use with Docker Development Environments
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You can use this sample with the Dev Environments feature of Docker Desktop.
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To develop directly on the services inside containers, use the HTTPS Git url of the sample:
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```
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https://github.com/docker/awesome-compose/tree/master/nginx-golang-postgres
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```
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