Workshop 1: Storage and Networks in Docker

Storage

Let’s work with Docker volumes:

Create a Docker volume called “miweb”:
```
docker volume create miweb
```
Create a container from the image php:7.4-apache, mounting the Docker volume in /var/www/html (the DocumentRoot of the server):
```
docker run -d --name my-apache-app -v miweb:/var/www/html -p 8080:80 php:7.4-apache
```

Use the docker cp command to copy an index.html file (with your name) into /var/www/html:

echo "<h1>Javier Cruces</h1>" > index.html
docker cp index.html my-apache-app:/var/www/html/

Access the container from the browser to check the index.html file:
```
curl http://localhost:8080
```
Output:
```
<h1>Javier Cruces</h1>
```
Delete the container:
```
docker rm -f my-apache-app
```

Create a new container and mount the same volume:

docker run -d --name Taller1 -v miweb:/var/www/html -p 8080:80 php:7.4-apache

Access the container again to verify the file is still there:
```
curl http://localhost:8080
```
Output:
```
<h1>Javier Cruces</h1>
```

Bind Mount

Create a directory on your host and copy index.html into it:
```
mkdir taller1
cp index.html taller1/
```

Create a container from php:7.4-apache, mounting the directory via bind mount:

docker run -d --name Taller1 -v $(pwd)/taller1:/var/www/html -p 8080:80 php:7.4-apache

Access the container from the browser to verify the file:
```
curl http://localhost:8080
```
Output:
```
<h1>Javier Cruces</h1>
```

Modify the index.html file on your host and check if the content updates in the container:

echo "<h1>Javier Cruces Doval</h1>" > taller1/index.html
curl http://localhost:8080

Output:

<h1>Javier Cruces Doval</h1>

Delete the container:
```
docker rm -f Taller1
```

Create a new container and mount the same directory:

docker run -d --name Taller1 -v $(pwd)/taller1:/var/www/html -p 8080:80 php:7.4-apache

Verify the content again:

curl http://localhost:8080

Output:

<h1>Javier Cruces Doval</h1>

Networks

Nextcloud + MariaDB Deployment

We are going to deploy the Nextcloud application with a database (NOTE: Use the image mariadb:10.5 to avoid issues). You can use the WordPress deployment guide as reference.

Create a bridge-type network:
```
docker network create taller1
```

Create the database container connected to the network. Configure it to create a database and a user, and ensure data persistence using volumes:

docker run -d --name wp_db \
    --network taller1 \
    -v db_vol:/var/lib/mysql \
    -e MYSQL_ROOT_PASSWORD=wordpress \
    -e MYSQL_DATABASE=wordpress \
    -e MYSQL_USER=wordpress \
    -e MYSQL_PASSWORD=wordpress \
    mariadb:10.5

Create a Nextcloud container connected to the same network, using appropriate environment variables for database connection and persistence:

docker run -d --name nextcloud \
    --network taller1 \
    -e MYSQL_DATABASE=wordpress \
    -e MYSQL_USER=wordpress \
    -e MYSQL_PASSWORD=wordpress \
    -e MYSQL_HOST=wp_db \
    -p 8080:80 \
    nextcloud:latest

Access the application using a web browser at http://localhost:8080.

Francisco Javier Cruces Doval

Workshop 1: Storage and Networks in Docker