80 lines
2.2 KiB
Markdown
80 lines
2.2 KiB
Markdown
## Compose sample application
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### NGINX proxy with GO backend
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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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│ └── main.go
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├── compose.yaml
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├── frontend
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│ ├── Dockerfile
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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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```
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services:
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frontend:
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build: frontend
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ports:
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- 80:80
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depends_on:
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- backend
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backend:
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build: backend
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```
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The compose file defines an application with two services `frontend` and `backend`.
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When deploying the application, docker compose maps port 80 of the frontend service container to the same port of the host as specified in the file.
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Make sure port 80 on the host is not already in use.
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## Deploy with docker compose
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```
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$ docker compose up -d
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Creating network "nginx-golang_default" with the default driver
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Building backend
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Step 1/7 : FROM golang:1.13 AS build
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1.13: Pulling from library/golang
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...
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Successfully built 4b24f27138cc
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Successfully tagged nginx-golang_frontend:latest
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WARNING: Image for service frontend 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_backend_1 ... done
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Creating nginx-golang_frontend_1 ... done
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```
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## Expected result
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Listing containers must show two containers running and the port mapping as below:
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```
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$ docker ps
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CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
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8bd5b0d78e73 nginx-golang_frontend "nginx -g 'daemon of…" 53 seconds ago Up 52 seconds 0.0.0.0:80->80/tcp nginx-golang_frontend_1
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56f929c240a0 nginx-golang_backend "/usr/local/bin/back…" 53 seconds ago Up 53 seconds nginx-golang_backend_1
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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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```
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$ curl localhost:80
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## .
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## ## ## ==
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## ## ## ## ## ===
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/"""""""""""""""""\___/ ===
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{ / ===-
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\______ O __/
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\ \ __/
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\____\_______/
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Hello from Docker!
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```
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Stop and remove the containers
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```
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$ docker compose down
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```
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