81 lines
2.4 KiB
Markdown
81 lines
2.4 KiB
Markdown
## Compose sample application
|
|
### Java application with Spring framework and a Postgres database
|
|
|
|
Project structure:
|
|
```
|
|
.
|
|
├── backend
|
|
│ ├── Dockerfile
|
|
│ └── ...
|
|
├── db
|
|
│ └── password.txt
|
|
├── docker-compose.yaml
|
|
└── README.md
|
|
|
|
```
|
|
|
|
[_docker-compose.yaml_](docker-compose.yaml)
|
|
```
|
|
version: "3.7"
|
|
services:
|
|
backend:
|
|
build: backend
|
|
ports:
|
|
- 8080:8080
|
|
db:
|
|
image: postgres
|
|
...
|
|
```
|
|
The compose file defines an application with two services `backend` and `db`.
|
|
When deploying the application, docker-compose maps port 8080 of the backend service container to port 8080 of the host as specified in the file.
|
|
Make sure port 8080 on the host is not already being in use.
|
|
|
|
## Deploy with docker-compose
|
|
|
|
```
|
|
$ docker-compose up -d
|
|
Creating network "spring-postgres_default" with the default driver
|
|
Building backend
|
|
Step 1/11 : FROM maven:3.5-jdk-9 AS build
|
|
3.5-jdk-9: Pulling from library/maven
|
|
...
|
|
Successfully tagged spring-postgres_backend:latest
|
|
WARNING: Image for service backend was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
|
|
Creating spring-postgres_backend_1 ... done
|
|
Creating spring-postgres_db_1 ... done
|
|
```
|
|
|
|
## Expected result
|
|
|
|
Listing containers must show two containers running and the port mapping as below:
|
|
```
|
|
$ docker ps
|
|
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
|
|
56236f640eaa postgres "docker-entrypoint.s…" 29 seconds ago Up 28 seconds 5432/tcp spring-postgres_db_1
|
|
6e69472dc2c0 spring-postgres_backend "java -Djava.securit…" 29 seconds ago Up 28 seconds 0.0.0.0:8080->8080/tcp spring-postgres_backend_1
|
|
```
|
|
|
|
After the application starts, navigate to `http://localhost:8080` in your web browse or run:
|
|
```
|
|
$ curl localhost:8080
|
|
<!DOCTYPE HTML>
|
|
<html>
|
|
<head>
|
|
<title>Getting Started: Serving Web Content</title>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
|
</head>
|
|
<body>
|
|
<p>Hello from Docker!</p>
|
|
</body>
|
|
```
|
|
|
|
Stop and remove the containers
|
|
```
|
|
$ docker-compose down
|
|
Stopping spring-postgres_db_1 ... done
|
|
Stopping spring-postgres_backend_1 ... done
|
|
Removing spring-postgres_db_1 ... done
|
|
Removing spring-postgres_backend_1 ... done
|
|
Removing network spring-postgres_default
|
|
```
|