nextcloud-selfhosted/README.md

# Nextcloud Self-hosted VPS

Docker Compose setup for a self-hosted VPS running Nextcloud, Gitea, and monitoring — managed as a GitOps-style repo.

## Prerequisites

- A VPS with SSH access
- Domain `t-gstone.de` with DNS control
- Git installed locally

Check your VPS OS:

```bash
cat /etc/os-release
```

## DNS Setup

Create these A records pointing to your VPS IP:

| Record                  | Value      |
|-------------------------|------------|
| `nextcloud.t-gstone.de` | `<VPS_IP>` |
| `git.t-gstone.de`       | `<VPS_IP>` |

## Local Setup

### SSH Access

Add this to `~/.ssh/config` on your local machine:

```
Host t-gstone.de
    HostName t-gstone.de
    User gstone
    Port 55
    IdentityFile ~/.ssh/id_ed25519
    UseKeychain yes
    AddKeysToAgent yes
```

Generate a key and copy it to the VPS:

```bash
# Generate key (skip if you already have ~/.ssh/id_ed25519)
ssh-keygen -t ed25519

# Copy it to the VPS (will ask for your password once)
ssh-copy-id -p 55 gstone@t-gstone.de

# Store passphrase in macOS Keychain
ssh-add --apple-use-keychain ~/.ssh/id_ed25519
```

After this, `ssh t-gstone.de` connects without any password prompts.

## Syncing to the VPS

If the VPS doesn't have a git remote set up yet, use `rsync` over SSH to push the repo:

```bash
# Sync the repo to the VPS (dry-run first to check what would be sent)
rsync -avz --dry-run -e 'ssh -p 55' \
  --exclude '.env' --exclude '*/.env' --exclude '.git' \
  ./ gstone@t-gstone.de:~/nextcloud-selfhosted/

# Run for real (remove --dry-run)
rsync -avz -e 'ssh -p 55' \
  --exclude '.env' --exclude '*/.env' --exclude '.git' \
  ./ gstone@t-gstone.de:~/nextcloud-selfhosted/
```

The `.env` files are excluded because they contain secrets and should be created directly on the VPS from the `.env.example` templates.

## Syncing via Git (recommended)

Now that Gitea is running, you can clone the repo directly on the VPS instead of using rsync.

### First-time setup on the VPS

```bash
# 1. Add your SSH key to Gitea (via https://git.t-gstone.de user settings)

# 2. Clone the repo
cd ~
git clone ssh://git@git.t-gstone.de:2222/gstone/nextcloud-selfhosted.git
cd nextcloud-selfhosted

# 3. Create .env files from examples
cp .env.example .env
cp nextcloud/.env.example nextcloud/.env
cp gitea/.env.example gitea/.env
cp monitoring/.env.example monitoring/.env

# 4. Edit each .env file with real values
nano .env
nano nextcloud/.env
nano gitea/.env
nano monitoring/.env

# 5. Deploy
sudo ./scripts/deploy.sh
```

### Updating the VPS after pushing changes

```bash
cd ~/nextcloud-selfhosted
git pull
sudo docker compose --env-file .env up -d
```

## Quick Start

```bash
# 1. Clone this repo on the VPS
git clone <repo-url> && cd nextcloud-selfhosted

# 2. Create .env files from examples
cp .env.example .env
cp nextcloud/.env.example nextcloud/.env
cp gitea/.env.example gitea/.env
cp monitoring/.env.example monitoring/.env

# 3. Edit each .env file with real values
#    - Generate strong passwords for Postgres and Nextcloud admin
#    - Add Grafana Cloud credentials to monitoring/.env

# 4. Deploy
./scripts/deploy.sh
```

## Services

| Service    | Subdomain               | Stack                               |
|------------|-------------------------|-------------------------------------|
| Nextcloud  | `nextcloud.t-gstone.de` | Nextcloud + PostgreSQL 16 + Redis 7 |
| Gitea      | `git.t-gstone.de`       | Gitea (SQLite)                      |
| Caddy      | —                       | Reverse proxy, auto HTTPS           |
| Monitoring | —                       | Grafana Alloy -> Grafana Cloud      |

## Data Layout

All persistent data lives under `/opt/docker-data/`:

```
/opt/docker-data/
├── caddy/data/          # TLS certificates
├── caddy/config/
├── nextcloud/html/      # Nextcloud application
├── nextcloud/data/      # User files
├── nextcloud/db/        # PostgreSQL data
├── gitea/data/          # Repositories + Gitea DB
└── gitea/config/        # Gitea configuration
```

## Managing Services

A root `docker-compose.yml` includes all stacks, so you can manage everything with one command:

```bash
# Start / restart all services
docker compose --env-file .env up -d

# View logs for all services
docker compose --env-file .env logs -f

# Stop everything
docker compose --env-file .env down
```

You can still target individual services via their compose file:

```bash
docker compose -f nextcloud/docker-compose.yml --env-file .env up -d
docker compose -f gitea/docker-compose.yml --env-file .env logs -f
```

## Adding a New Service

1. Create a new directory: `mkdir myapp/`
2. Create `myapp/docker-compose.yml`:
    - Join the `proxy` external network
    - Bind mount data to `${DATA_ROOT}/myapp/`
    - Add `myapp/.env.example` if the service needs secrets
3. Add `- path: myapp/docker-compose.yml` to root `docker-compose.yml`
4. Add a reverse proxy entry in `caddy/Caddyfile`:
   ```
   myapp.t-gstone.de {
       reverse_proxy myapp:8080
   }
   ```
5. Reload Caddy: `docker exec caddy caddy reload --config /etc/caddy/Caddyfile`
6. Add a DNS A record for `myapp.t-gstone.de` -> VPS IP
7. Add data directory creation to `scripts/deploy.sh`
8. Add backup steps to `scripts/backup.sh` if the service has persistent data

## Backup & Restore

### Creating Backups

```bash
./scripts/backup.sh
```

This dumps the Nextcloud Postgres database, archives Nextcloud data/config and Gitea data, and stores them in
`/opt/backups/` with date-stamped filenames. Backups older than 7 days are automatically removed.

Schedule daily backups:

```bash
crontab -e
# Add:
0 3 * * * /path/to/scripts/backup.sh >> /var/log/backup.log 2>&1
```

### Restoring

```bash
./scripts/restore.sh 2026-03-22
```

This stops services, restores data from the specified date's backup files, restores the database, and restarts
everything.

### Backup Strategy Options

The current setup stores backups locally on the same VPS. For production use, consider an off-site strategy:

| Option                                                                          | Pros                                 | Cons                      |
|---------------------------------------------------------------------------------|--------------------------------------|---------------------------|
| **Local only** (`/opt/backups/`)                                                | Simplest, no extra cost              | Lost if VPS dies          |
| **rsync to second VPS or home server**                                          | Simple, full control                 | Need a second machine     |
| **S3-compatible object storage** (Backblaze B2, Hetzner Object Storage, Wasabi) | Cheap, durable, off-site             | Monthly cost (~$0.005/GB) |
| **Restic or BorgBackup** to any remote target                                   | Encrypted, deduplicated, incremental | More setup complexity     |

Recommendation for a personal setup: **Backblaze B2 or Hetzner Object Storage with Restic**. Both offer free egress (B2)
or low cost, and Restic handles encryption + deduplication automatically. A cron job running `restic backup` after
`backup.sh` completes the pipeline.

## Monitoring

### Setup

1. Sign up at [grafana.com](https://grafana.com) (free tier)
2. Go to **My Account** -> **Grafana Cloud** -> your stack
3. Find your Loki and Prometheus endpoints + credentials
4. Fill in `monitoring/.env` with those values
5. Start the monitoring stack: `docker compose --env-file .env up -d`

### Recommended Alerts

Set these up in Grafana Cloud UI (**Alerting** -> **Alert rules**):

| Alert                | Condition                                                             | Severity |
|----------------------|-----------------------------------------------------------------------|----------|
| Disk usage high      | `node_filesystem_avail_bytes` / `node_filesystem_size_bytes` < 0.2    | Critical |
| Container restarting | Container restart count > 3 in 10 min                                 | Warning  |
| High memory usage    | `node_memory_MemAvailable_bytes` / `node_memory_MemTotal_bytes` < 0.1 | Warning  |
| High CPU usage       | `node_cpu_seconds_total` idle < 10% sustained 5 min                   | Warning  |
| Nextcloud cron stale | No log line from `nextcloud-cron` in 15 min                           | Warning  |

### Recommended Dashboards

Import these from [Grafana Dashboards](https://grafana.com/grafana/dashboards/):

- **Node Exporter Full** (ID: 1860) — CPU, memory, disk, network
- **Docker Container Monitoring** (ID: 893) — per-container resource usage
- **Loki Docker Logs** — search and filter container logs

## Security Hardening (Reference)

These steps are **not automated** — apply them manually based on your needs.

### Firewall (UFW)

```bash
ufw default deny incoming
ufw default allow outgoing
ufw allow 22/tcp      # SSH (change if using non-default port)
ufw allow 80/tcp      # HTTP (Caddy redirect)
ufw allow 443/tcp     # HTTPS
ufw allow 443/udp     # HTTPS (HTTP/3 / QUIC)
ufw allow 2222/tcp    # Gitea SSH
ufw enable
```

### SSH Hardening

Edit `/etc/ssh/sshd_config`:

```
PasswordAuthentication no
PermitRootLogin prohibit-password
MaxAuthTries 3
```

Then: `systemctl restart sshd`

### fail2ban

```bash
apt install fail2ban
```

Create `/etc/fail2ban/jail.local`:

```ini
[sshd]
enabled = true
maxretry = 5
bantime = 3600

[nextcloud]
enabled = true
port = 80,443
filter = nextcloud
logpath = /opt/docker-data/nextcloud/data/nextcloud.log
maxretry = 5
bantime = 3600
```

Create `/etc/fail2ban/filter.d/nextcloud.conf`:

```ini
[Definition]
failregex = ^.*Login failed.*Remote IP.*<HOST>.*$
```

### Unattended Security Upgrades

```bash
apt install unattended-upgrades
dpkg-reconfigure -plow unattended-upgrades
```

### Docker Daemon

- Keep Docker updated: `apt update && apt upgrade docker-ce`
- Don't run containers as root unless necessary (Gitea uses rootless image)
- The Docker socket is mounted read-only into the Alloy container — be aware this still grants significant access