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Move all samples to the root dir

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Signed-off-by: Anca Iordache <anca.iordache@docker.com>
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Anca Iordache 2020-03-16 17:23:59 +01:00
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samples/sparkjava-mysql/README.md
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## Compose sample application
### Java Spark application with MySQL 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:
- 80:8080
db:
image: mysql:5.7
...
```
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 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 "sparkjava-mysql_default" with the default driver
Building backend
...
Successfully tagged sparkjava-mysql_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 sparkjava-mysql_db_1 ... done
Creating sparkjava-mysql_backend_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
ee1e4f05d9f6 sparkjava-mysql_backend "/bin/sh -c 'java -j…" 44 seconds ago Up 43 seconds 0.0.0.0:80->8080/tcp sparkjava-mysql_backend_1
716025ddf65b mysql:5.7 "docker-entrypoint.s…" 44 seconds ago Up 43 seconds 3306/tcp, 33060/tcp sparkjava-mysql_db_1
```
After the application starts, 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
Stopping sparkjava-mysql_backend_1 ... done
Stopping sparkjava-mysql_db_1 ... done
Removing sparkjava-mysql_backend_1 ... done
Removing sparkjava-mysql_db_1 ... done
Removing network sparkjava-mysql_default
```