Self-Hosting Nextcloud: Complete Guide

What is Nextcloud?

Nextcloud is a self-hosted alternative to Google Drive, Dropbox, and Microsoft 365. It provides file sync, calendar, contacts, mail, video calls, and hundreds of apps.

Requirements

Docker Installation (Recommended)

# docker-compose.yml
services:
  nextcloud:
    image: nextcloud:28-apache
    ports:
      - "8080:80"
    volumes:
      - nextcloud_data:/var/www/html
    environment:
      - MYSQL_HOST=db
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud
      - MYSQL_PASSWORD=secure-password-here
    depends_on:
      - db
    restart: unless-stopped

  db:
    image: mariadb:11
    volumes:
      - db_data:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=root-password
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud
      - MYSQL_PASSWORD=secure-password-here
    restart: unless-stopped

volumes:
  nextcloud_data:
  db_data:

docker compose up -d

Nginx Reverse Proxy

server {
    listen 443 ssl http2;
    server_name cloud.example.com;

    ssl_certificate /etc/letsencrypt/live/cloud.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/cloud.example.com/privkey.pem;

    client_max_body_size 10G;

    location / {
        proxy_pass http://127.0.0.1:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

Performance Tuning

Enable Redis Caching

# Add to docker-compose.yml
  redis:
    image: redis:7-alpine
    restart: unless-stopped

Add to config.php:

'memcache.local' => '\OC\Memcache\APCu',
'memcache.distributed' => '\OC\Memcache\Redis',
'memcache.locking' => '\OC\Memcache\Redis',
'redis' => [
    'host' => 'redis',
    'port' => 6379,
],

PHP Tuning

memory_limit = 512M
upload_max_filesize = 10G
post_max_size = 10G
max_execution_time = 3600

Essential Post-Install Steps

1. Set up trusted domains in config.php
2. Configure email server for notifications
3. Enable 2FA for all users
4. Set up background jobs via cron (not AJAX)
5. Install and configure the Collabora or OnlyOffice app for document editing

Warning Always set client_max_body_size in Nginx to match your upload limit. The default 1M will prevent any meaningful file uploads.