80 lines
2.4 KiB
Markdown
80 lines
2.4 KiB
Markdown
## Compose sample application
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### Go server with an Nginx proxy and a MySQL 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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│ └── main.go
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├── db
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│ └── password.txt
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├── docker-compose.yaml
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├── proxy
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│ ├── conf
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│ └── Dockerfile
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└── README.md
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```
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[_docker-compose.yaml_](docker-compose.yaml)
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```
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services:
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backend:
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build: backend
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...
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db:
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image: mysql:5.7
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...
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proxy:
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build: proxy
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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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```
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$ docker-compose up -d
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Creating network "nginx-golang-mysql_default" with the default driver
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Building backend
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Step 1/8 : FROM golang:1.13-alpine AS build
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1.13-alpine: Pulling from library/golang
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...
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Successfully built 5f7c899f9b49
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Successfully tagged nginx-golang-mysql_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-mysql_db_1 ... done
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Creating nginx-golang-mysql_backend_1 ... done
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Creating nginx-golang-mysql_proxy_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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8906b14c5ad1 nginx-golang-mysql_proxy "nginx -g 'daemon of…" 2 minutes ago Up 2 minutes 0.0.0.0:80->80/tcp nginx-golang-mysq
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l_proxy_1
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13e0e0a7715a nginx-golang-mysql_backend "/server" 2 minutes ago Up 2 minutes 8000/tcp nginx-golang-mysq
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l_backend_1
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ca8c5975d205 mysql:5.7 "docker-entrypoint.s…" 2 minutes ago Up 2 minutes 3306/tcp, 33060/tcp nginx-golang-mysq
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l_db_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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["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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```
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$ docker-compose down
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```
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