# Requirements for Sherpa Orchestrator Server (Local Installation)

### System Requirements

* **OS**: Debian 11 minimal (recommended), other Linux distributions with possible modifications
* **CPU**: x86\_64, minimum 2 cores
* **RAM**: 4 GB minimum, 8 GB+ recommended
* **Disk**: 20 GB+ of free space
* **Network**: Fixed IP address and stable internet connection for all expected clients
* **Access**: sudo rights for installation

**Important:**

* Installation takes time due to downloading packages and dependencies
* After installation, internet is not required for operation
* The server must have a fixed IP address

### Preparing the Server

#### Checking System Resources

```bash
# Check system resources
df -h          # Disk space
free -h        # RAM
lscpu | grep -E "^CPU\(s\)|Model name"  # CPU information
```

<details>

<summary>💡 Comments on Resource Check</summary>

**df -h** - shows disk space usage in human-readable format **free -h** - shows information about RAM **lscpu** - shows information about the CPU

**Recommended minimum values:**

* Disk: at least 20 GB of free space
* RAM: at least 4 GB
* CPU: at least 2 cores

</details>

#### Checking Port Availability

Sherpa Orchestrator uses the following ports:

* **443** - HTTPS web interface (mandatory)
* **3306** - MySQL/MariaDB database
* **5432** - PostgreSQL database (optional)

#### Checking Port Availability

```bash
# Check if the required ports are occupied
sudo netstat -tlnp | grep -E ":443 |:3306 |:5432 " || echo "Ports are free"
```

<details>

<summary>💡 Comments on Port Check</summary>

**sudo netstat -tlnp** - shows all listening TCP ports and processes

* `-t` - TCP ports
* `-l` - only listening ports
* `-n` - numeric format (without name resolution)
* `-p` - shows PID and process name

**Expected Result:**

* If the ports are free, the command will output "Ports are free"
* If the ports are occupied, it will show the processes using them

</details>

### Supported Operating Systems

* **Debian 11** (recommended for this guide)
* Ubuntu 18.04+
* CentOS 7/8
* Other Linux distributions (with possible command modifications)

### Network Requirements

* **Fixed IP address** - critically important for client access
* **Internet access** - for downloading packages and updates
* **DNS resolution** - for accessing package repositories

### Security Requirements

* **SSL/TLS certificates** - for HTTPS access
* **Firewall** - must allow access to port 443
* **SELinux/AppArmor** - must be configured or disabled if issues arise

### Final Check Before Installation

```bash
# Check system resources
echo "=== System Resources ==="
df -h /
free -h
lscpu | grep -E "^CPU\(s\)|Model name"

# Check network
echo "=== Network Configuration ==="
ip addr show

# Check access to repositories
echo "=== Access to Repositories ==="
sudo apt update --dry-run 2>/dev/null | head -10

echo "If all checks are successful, you can proceed with the installation of Sherpa Orchestrator"
```


---

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