Nextcloud Hub: Self-Hosted Google Workspace Alternative

Nextcloud started as a file sync tool (like Dropbox) and has grown into a full collaboration platform. Nextcloud Hub adds Calendar, Contacts, Talk (video/messaging), Office (document editing), and Mail to the core file sync. The result is a credible Google Workspace alternative that runs on your infrastructure.

Photo by BoliviaInteligente on Unsplash

What Nextcloud Hub Includes

Files: File sync and share. Desktop sync clients (Windows, Mac, Linux), mobile apps, web interface. Versioning, trash, sharing with links or user accounts.

Calendar: CalDAV-compatible calendar. Sync with iOS Calendar, Android, macOS, Thunderbird. Create, share, and subscribe to calendars.

Contacts: CardDAV contact storage. Sync with phone contacts, macOS Contacts, Thunderbird.

Talk: Video/audio calls, chat, and group messaging. Screen sharing. No external infrastructure needed — runs on your server.

Collabora Online / Nextcloud Office: Real-time collaborative document editing (Writer, Calc, Impress). Either self-hosted Collabora or the lighter-weight Nextcloud Office.

Mail: Webmail client connecting to your existing IMAP accounts.

Deck: Kanban boards for project management.

Photos: Photo viewing with albums and memories timeline.

Docker Compose Deployment

Nextcloud with PostgreSQL and Redis:

services:
  nextcloud:
    image: nextcloud:28-apache
    restart: always
    ports:
      - 8080:80
    volumes:
      - nextcloud-data:/var/www/html
      - /path/to/your/data:/var/www/html/data  # External data directory
    environment:
      POSTGRES_HOST: nextcloud-db
      POSTGRES_DB: nextcloud
      POSTGRES_USER: nextcloud
      POSTGRES_PASSWORD: change-this
      NEXTCLOUD_ADMIN_USER: admin
      NEXTCLOUD_ADMIN_PASSWORD: change-admin-password
      NEXTCLOUD_TRUSTED_DOMAINS: nextcloud.yourdomain.com
      REDIS_HOST: nextcloud-redis
      PHP_MEMORY_LIMIT: 512M
      PHP_UPLOAD_LIMIT: 512M
    depends_on:
      - nextcloud-db
      - nextcloud-redis

  nextcloud-db:
    image: postgres:15-alpine
    restart: always
    environment:
      POSTGRES_DB: nextcloud
      POSTGRES_USER: nextcloud
      POSTGRES_PASSWORD: change-this
    volumes:
      - nextcloud-db:/var/lib/postgresql/data

  nextcloud-redis:
    image: redis:7-alpine
    restart: always

  # Cron job for background tasks
  nextcloud-cron:
    image: nextcloud:28-apache
    restart: always
    volumes:
      - nextcloud-data:/var/www/html
    entrypoint: /cron.sh
    depends_on:
      - nextcloud-db
      - nextcloud-redis

volumes:
  nextcloud-data:
  nextcloud-db:

Note: Put your actual data on an external path (not a named volume) if you have a large storage volume mounted. The /var/www/html volume is for app code; /var/www/html/data is user files.

Initial Setup

After starting, navigate to your URL and Nextcloud will complete the admin setup (unless you set NEXTCLOUD_ADMIN_USER in environment variables, in which case it's already done).

Post-install tasks:

1. Set up a reverse proxy with HTTPS (required for mobile sync)
2. Configure email for notifications: Settings → Basic settings → Email server
3. Set up cron: ensure the cron container is running (replaces Nextcloud's webcron)
4. Configure Redis memcache (should be automatic from the compose above)

Performance: The Critical Tweaks

Nextcloud can be slow without tuning. Key changes:

APCu for local cache (add to nextcloud container environment):

environment:
  PHP_OPCACHE_ENABLE: 1

PHP-FPM instead of Apache mod_php: The nextcloud:fpm image uses PHP-FPM with Nginx, which is faster:

image: nextcloud:28-fpm

This requires a separate Nginx container configured as a frontend.

Redis for file locking (already in compose above — ensure REDIS_HOST is set).

Nextcloud config.php optimizations:

docker exec -u www-data nextcloud php occ config:system:set memcache.local --value='\OC\Memcache\APCu'
docker exec -u www-data nextcloud php occ config:system:set memcache.locking --value='\OC\Memcache\Redis'
docker exec -u www-data nextcloud php occ config:system:set maintenance_window_start --value=1

Default phone region (fixes warnings):

docker exec -u www-data nextcloud php occ config:system:set default_phone_region --value='US'

occ Command Line Interface

Nextcloud's CLI (occ) is essential for administration:

# Run as www-data user in the container
docker exec -u www-data nextcloud php occ <command>

# Common commands:
docker exec -u www-data nextcloud php occ status
docker exec -u www-data nextcloud php occ upgrade
docker exec -u www-data nextcloud php occ files:scan --all        # Re-scan for file changes
docker exec -u www-data nextcloud php occ user:list
docker exec -u www-data nextcloud php occ app:list                # Installed apps
docker exec -u www-data nextcloud php occ maintenance:mode --on   # Enable maintenance mode

Mobile Clients

File sync: Nextcloud iOS and Android apps. Set up server URL (your HTTPS domain), log in, enable auto-upload for photos.

Calendar: iOS — Settings → Calendar → Accounts → Add Account → Other → CalDAV. URL: https://nextcloud.yourdomain.com/remote.php/dav/

Contacts: iOS — Settings → Contacts → Accounts → Add Account → Other → CardDAV. Same URL format.

The CalDAV/CardDAV auto-discovery works if your server is accessible via HTTPS.

Nextcloud Office (Collaborative Editing)

For collaborative document editing without a full Collabora installation:

1. Install the "Nextcloud Office" app (lighter weight, built-in)
2. Or install "Collabora Online" app and connect a Collabora instance

Nextcloud Office is simpler — it's bundled and requires no separate service. Collabora Online has better compatibility with complex documents.

Key Apps Worth Installing

From the App Store (Settings → Apps):

• Calendar: Calendar app (usually pre-installed)
• Contacts: Contacts app
• Deck: Kanban boards
• Tasks: Tasks/to-do lists syncing with CalDAV
• Notes: Simple markdown notes
• Photos: Enhanced photo browsing
• Talk: Video/chat (requires TURN server for reliable external connections)
• External storage: Mount S3, FTP, SMB shares in Nextcloud

Backups

# 1. Enable maintenance mode
docker exec -u www-data nextcloud php occ maintenance:mode --on

# 2. Backup database
docker exec nextcloud-db pg_dump -U nextcloud nextcloud > nextcloud_$(date +%Y%m%d).sql

# 3. Backup data directory
rsync -av /path/to/your/data/ backup/

# 4. Backup config
docker exec nextcloud cat /var/www/html/config/config.php > nextcloud_config.php

# 5. Disable maintenance mode
docker exec -u www-data nextcloud php occ maintenance:mode --off

Hardware Requirements

Nextcloud is PHP-based and memory-hungry. File transfers and photo thumbnailing are CPU-intensive. On a $20/month VPS (2vCPU, 4GB RAM), Nextcloud runs smoothly for a family of 5.