Using NSSM

here's a simple powershell that helped me setup beszel-agent as a windows service, nssm.exe needs to be placed in the same directory as the app or installed in path in its own dir:

# Check for administrator privileges
if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
    try {
        $scriptPath = $MyInvocation.MyCommand.Path
        $scriptDir = Split-Path $scriptPath
        Start-Process powershell "-NoProfile -ExecutionPolicy Bypass -File `"$scriptPath`"" -Verb RunAs -WorkingDirectory $scriptDir -ErrorAction Stop
        exit 0
    } catch {
        Write-Host "Failed to elevate script: $_"
        Read-Host "Press Enter to exit"
        exit 1
    }
}

try {
    Write-Host "Running with admin rights..."
    C:\beszel-agent\nssm.exe install beszel-agent "C:\beszel-agent\beszel-agent.exe" --% "-listen ""45876"" -key ""ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOP77rXdtv5yX4yYVy1AIz1ZZ1b1/Xh42Ma3CIbhH0r5"""
    C:\beszel-agent\nssm.exe set beszel-agent DisplayName Beszel Agent
    C:\beszel-agent\nssm.exe set beszel-agent Description Beszel agent resources monitor
    C:\beszel-agent\nssm.exe set beszel-agent Start SERVICE_AUTO_START
    C:\beszel-agent\nssm.exe set beszel-agent AppEnvironmentExtra "+EXTRA_FILESYSTEMS=F:,E:"
    C:\beszel-agent\nssm.exe start beszel-agent

    Write-Host "Agent installed successfully"    
    Read-Host "Press Enter to exit"
    exit 0
}
catch {
    Write-Error "An error occurred: $_"
    Read-Host "Press Enter to exit"
    exit 1
}

To uninstall, use:

if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) { 
    try {
        $scriptPath = $MyInvocation.MyCommand.Path 
    	$scriptDir = Split-Path $scriptPath 
    	Start-Process powershell "-NoProfile -ExecutionPolicy Bypass -File `"$scriptPath`"" -Verb RunAs -WorkingDirectory $scriptDir -ErrorAction Stop 
    	exit 0
    } catch {
	    Write-Host "Failed to elevate script: $_" Read-Host "Press Enter to exit" 
	    exit 1
    }
} 

try {Ï
    C:\beszel-agent\nssm.exe stop beszel-agent 
    C:\beszel-agent\nssm.exe remove beszel-agent confirm 
    Write-Host "Agent uninstalled successfully" 
    Read-Host "Press Enter to exit" 
    exit 0
} catch {
    Write-Error "An error occurred: $_" Read-Host "Press Enter to exit"
    exit 1 
}