Introduction

This repository contains scripts and configuration files needed to obtain a working instance of NextCloud on encrypted disks based on the official NextCloud Docker image and LUKS technology.

The following procedure has been tested on a Debian 9 (Stretch) virtual machine with two exernal devices:

• /dev/vdb used for the DBMS working directory (mounted on /opt/nextcloud/db)
• /dev/vdc used to store NextCloud data (mounted on /opt/nextcloud/data)

N.B. the devices must not be partitioned, formatted and mounted. the LUKS script will take care of encrypting, formatting and mounting them on the correct locations

Procedure

The procedure assumes as working directory the one containing the repo. Start by updating packages:

apt update
apt -y full-upgrade
apt -y autoremove

Then install Docker and the required packages:

apt -y install apt-transport-https ca-certificates curl gnupg2 software-properties-common
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"
apt update
apt -y install docker-ce

Install docker-compose (choose the last available version on https://github.com/docker/compose/releases)

curl -s https://github.com/docker/compose/releases | grep compose/releases | grep uname | head -1 | sed s/\<pre\>\<code\>// | bash
chmod +x /usr/local/bin/docker-compose

Encrypt devices with the scripts from https://github.com/mtangaro/fast-luks (copied in this repo and adapted; /dev/vdb is the DB device, /dev/vdc is the NextCloud data device):

apt -y install cryptsetup # you will be asked to choose your keyboard layout
cp luksctl_d* /usr/local/bin/
cp fast_luks_d* /usr/local/bin/
mkdir -p /etc/luks
mkdir -p /opt/nextcloud/db
mkdir -p /opt/nextcloud/data
fast_luks_db # insert password for the encryption of the device where DB files are stored
fast_luks_data # insert password for the encryption of the device where NextCloud data files are stored
rm -r /opt/nextcloud/data/lost+found/
rm -r /opt/nextcloud/db/lost+found/

N.B. the password is not stored anywhere and cannot be recovered or reset. If forgotten, when unmounting the devices all data will be lost. Please store it in a safe place.

Substitute the following fields in the docker-compose.yml file:

• <MYSQL_ROOT_PASSWORD> --> the root password for MySQL
• <MYSQL_nextcloud_USER_PASSWORD> --> the password for the MySQL nextcloud user.

and start the containers:

cp docker-compose.yml /opt/nextcloud/
cd /opt/nextcloud
docker-compose up -d

This will start two containers, one called nextcloud_app_1, the app, and another called nextcloud_db_1, the DBMS. The DB container is linked to the app one, which can refer to it as db (as will be specified in the online configuration). Complete the configuration online, pointing your browser to http://<DNS_NAME>:8080 and filling in the fields using the following parameter:

• In the field "Create an admin account" write username and password you want to use the administrator account
• Click on the drop down menu "Storage & database"
  • In the field "Data folder" put /var/www/html/data (there should already be the right path)
  • In the field "Configure the database" choose MySQL/MariaDB and put the following parameters
    • Database user --> nextcloud
    • Database password --> the value of the key MYSQL_PASSWORD in the docker-compose.yml file
    • Database name --> nextcloud
    • Database host --> db:3306

then click on "Finish setup"

Reverse proxy configuration

Now the app is available at the 8080 port, on HTTP without SSL. To enable SSL:

apt -y install nginx
rm /etc/nginx/sites-available/* /etc/nginx/sites-enabled/*
cp nextcloud.nginx /etc/nginx/sites-available/nextcloud

Substitute the <DNS_NAME> string in the /etc/nginx/sites-available/nextcloud file with the DNS name associated to your public IP. Create the directory to store the certificate and the private key:

mkdir -p /etc/nginx/ssl/

Link the SSL certificate to /etc/nginx/ssl/nextcloud.crt and the private key to /etc/nginx/ssl/nextcloud.key

ln -s <PATH_TO_SSL_CERTIFICATE> /etc/nginx/ssl/nextcloud.crt
ln -s <PATH_TO_PRIVATE_KEY> /etc/nginx/ssl/nextcloud.key

Activate the proxy:

ln -s /etc/nginx/sites-available/nextcloud /etc/nginx/sites-enabled/nextcloud
systemctl restart nginx.service

Now the app is available on https://<DNS_NAME> (with http to https redirection).

Enable the mail service

Enter the app container:

docker exec -it nextcloud_app_1 bash

and install sendmail

apt update
apt -y install sendmail