ZertoSensor.ps1

$User = "AD Domain Name\Name of Zerto Viewer Service Account"
$EncryptedPassword = "Encrypted Password"

$SecurePassword = $EncryptedPassword | ConvertTo-SecureString
$Marshal = [System.Runtime.InteropServices.Marshal]
$Bstr = $Marshal::SecureStringToBSTR($SecurePassword)
$Password = $Marshal::PtrToStringAuto($Bstr)
$Marshal::ZeroFreeBSTR($Bstr)

$ZertoServerURI = "https://zertoserver.domain.local:9669"

#Supress SSL check to allow Invoke-WebRequest to work with non trusted SSL certs
Add-Type @"
    using System;
    using System.Net;
    using System.Net.Security;
    using System.Security.Cryptography.X509Certificates;
    public class ServerCertificateValidationCallback
    {
        public static void Ignore()
        {
            ServicePointManager.ServerCertificateValidationCallback += 
                delegate
                (
                    Object obj, 
                    X509Certificate certificate, 
                    X509Chain chain, 
                    SslPolicyErrors errors
                )
                {
                    return true;
                };
        }
    }
"@
 
[ServerCertificateValidationCallback]::Ignore();

# POST Authorization to grab x-zerto-session header
$Auth = @{uri = "$ZertoServerURI/v1/session/add";
                   Method = 'POST';
                   Headers = @{Authorization = 'Basic ' + [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes("$($User):$($Password)"));}
		}

$AuthXML = Invoke-WebRequest @Auth -UseBasicParsing

# GET Zerto Virtual Manager Errors
$ZvmErrors = @{uri = "$ZertoServerURI/v1/alerts?entity=Zvm&level=error";
                   Method = 'GET';
				   Headers = @{'x-zerto-session' = $AuthXML.Headers['x-zerto-session']; 'Accept' = 'application/xml';}
				}
[xml]$ZvmErrorsXML = invoke-restmethod @ZvmErrors

# GET Zerto Virtual Manager Warnings
$ZvmWarnings = @{uri = "$ZertoServerURI/v1/alerts?entity=Zvm&level=warning";
                   Method = 'GET';
				   Headers = @{'x-zerto-session' = $AuthXML.Headers['x-zerto-session']; 'Accept' = 'application/xml';}
				}
[xml]$ZvmWarningsXML = invoke-restmethod @ZvmWarnings
	
# GET Zerto Virtual Appliance Errors
$VraErrors = @{uri = "$ZertoServerURI/v1/alerts?entity=Vra&level=error";
                   Method = 'GET';
				   Headers = @{'x-zerto-session' = $AuthXML.Headers['x-zerto-session']; 'Accept' = 'application/xml';}
				}
[xml]$VraErrorsXML = invoke-restmethod @VraErrors
	
# GET Zerto Virtual Appliance Warnings
$VraWarnings = @{uri = "$ZertoServerURI/v1/alerts?entity=Vra&level=warning";
                   Method = 'GET';
				   Headers = @{'x-zerto-session' = $AuthXML.Headers['x-zerto-session']; 'Accept' = 'application/xml';}
				}
[xml]$VraWarningsXML = invoke-restmethod @VraWarnings

# GET Zerto Virtual Protection Group Errors
$VpgErrors = @{uri = "$ZertoServerURI/v1/alerts?entity=Vpg&level=error";
                   Method = 'GET';
				   Headers = @{'x-zerto-session' = $AuthXML.Headers['x-zerto-session']; 'Accept' = 'application/xml';}
				}
[xml]$VpgErrorsXML = invoke-restmethod @VpgErrors

# GET Zerto Virtual Protection Group Warnings
$VpgWarnings = @{uri = "$ZertoServerURI/v1/alerts?entity=Vpg&level=warning";
                   Method = 'GET';
				   Headers = @{'x-zerto-session' = $AuthXML.Headers['x-zerto-session']; 'Accept' = 'application/xml';}
				}
[xml]$VpgWarningsXML = invoke-restmethod @VpgWarnings

#Count the number of error or warning values for each result
$ZVMErrorCount = $ZvmErrorsXML.ArrayOfAlertApi.ChildNodes.Count
$ZVMWarningCount = $ZvmWarningsXML.ArrayOfAlertApi.ChildNodes.Count
$VraErrorCount = $VraErrorsXML.ArrayOfAlertApi.ChildNodes.Count
$VraWarningCount = $VraWarningsXML.ArrayOfAlertApi.ChildNodes.Count
$VpgErrorCount = $VpgErrorsXML.ArrayOfAlertApi.ChildNodes.Count
$VpgWarningCount = $VpgWarningsXML.ArrayOfAlertApi.ChildNodes.Count

# XML Output for PRTG
Write-Host "<prtg>" 
Write-Host "<result>"
               "<channel>ZVMErrors</channel>"
               "<value>$ZVMErrorCount</value>"
               "<showChart>1</showChart>"
               "<showTable>1</showTable>"
	       "<LimitMaxError>0</LimitMaxError>"
               "<LimitMode>1</LimitMode>"
               "</result>"
Write-Host "<result>"
               "<channel>ZVMWarnings</channel>"
               "<value>$ZVMWarningCount</value>"
               "<showChart>1</showChart>"
               "<showTable>1</showTable>"
	       "<LimitMaxWarning>0</LimitMaxWarning>"
               "<LimitMode>1</LimitMode>"
               "</result>"
Write-Host "<result>"
               "<channel>VRAErrors</channel>"
               "<value>$VraErrorCount</value>"
               "<showChart>1</showChart>"
               "<showTable>1</showTable>"
	       "<LimitMaxError>0</LimitMaxError>"
               "<LimitMode>1</LimitMode>"
               "</result>"
Write-Host "<result>"
               "<channel>VRAWarnings</channel>"
               "<value>$VraWarningCount</value>"
               "<showChart>1</showChart>"
               "<showTable>1</showTable>"
	       "<LimitMaxWarning>0</LimitMaxWarning>"
               "<LimitMode>1</LimitMode>"
               "</result>"
Write-Host "<result>"
               "<channel>VPGErrors</channel>"
               "<value>$VpgErrorCount</value>"
               "<showChart>1</showChart>"
               "<showTable>1</showTable>"
	       "<LimitMaxError>0</LimitMaxError>"
               "<LimitMode>1</LimitMode>"
               "</result>"
Write-Host "<result>"
               "<channel>VPGWarnings</channel>"
               "<value>$VpgWarningCount</value>"
               "<showChart>1</showChart>"
               "<showTable>1</showTable>"
	       "<LimitMaxWarning>0</LimitMaxWarning>"
               "<LimitMode>1</LimitMode>"
               "</result>"
Write-Host "</prtg>"