Example Pre-recovery / Post-recovery Scripts

KB Number:
00000034

Purpose:

Purpose


Following are some examples of Pre-Recovery and/or Post-Recovery scripts for use with Zerto Virtual Replication.

Examples


Example 1 – Replace DNS A and PTR Records
The following script, c:ZertoScriptsDNS-Change.ps1, replaces multiple DNS A and PTR records for the two DNS servers, mydns1 and mydns2:
 
 

## Set DNS servers
$DNSservers= @("mydns1", "mydns2")
## Filepath to script and CSV files
$FP = "C:ZertoScripts"
CD $FP
Foreach($DNSserver in $DNSservers)
{
  Import-CSV .DNS-OldA.csv | foreach {
    dnscmd $DNSserver /RecordDelete $_.zone $_.hostname A $_.ip /f}
  Import-CSV .DNS-NewA.csv | foreach {
    dnscmd $DNSserver /RecordAdd $_.zone $_.hostname A $_.ip}
  Import-CSV .DNS-OldPTR.csv | foreach {
    dnscmd $DNSserver /RecordDelete $_.reversezone $_.lowip PTR $_.fqdn /f}
  Import-CSV .DNS-NewPTR.csv | foreach {
    dnscmd $DNSserver /RecordAdd $_.reversezone $_.lowip PTR $_.fqdn}
}

 
 
The script must be in the same folder, C:ZertoScripts, on both the local and remote Zerto Virtual Managers and this is the folder is the folder specified for the variable $FP in the script.
Update Command to run and Params fields for all the VPG definitions that you want to run the script.
 
Command to run – CMD:powershell.exe
Params – C:ZertoScriptsDNS-Change.ps1
This script requires that the machines running the Zerto Virtual Managers must be logged in as a member of the DNS administrators group and that all prerequisites for DNSCMD.exe are available. In addition, you require the files DNS-OldA.csvDNS-NewA.csvDNS-OldPTR.csv and DNS-NewPTR.csv, with the relevant A and PTR values in the same folder as the PowerShell script (C:ZertoScripts).
This example is for reference only. 
Example 2 – Recording Failover Tests
The following script, c:ZertoScriptsTestedVPGs.bat, writes the VPG name and date to the TestedVPGs.txt file every time a failover test is run:
 
 

SET isodt=%date:~10,4%-%date:~7,2%-%date:~4,2% %time:~0,2% %time:~3,2%-%time:~6,2% 
IF %1==Test ECHO %2 %isodt% >>c:ZertoScriptsResultsListOfTestedVPGs.txt

 
Where %1 is the first parameter in the list of parameters, %ZertoOperation%, and %2 is the second parameter in the list of parameters, %ZertoVPGName%.
 
Note: If the file ListOfTestedVPGs.txt does not exist it is created, as long as the folder, c:ZertoScriptsResults, exists.
Update Command to run and Params fields for all the VPG definitions that you want to run the script.
 
Command to run – c:ZertoScriptsTestedVPGs.bat
Params – %ZertoOperation% %ZertoVPGName%
Whenever a failover test is run on the relevant VPGs the TestedVPGs.txt file is updated with the name of the VPG and the date and time the test was run.
Example 3 – Moving Virtual Machines to a Resource Pool After a Failover
The following PowerShell script is an example of how to move virtual machines into resource pools as a post-recovery script. This script would typically be used when you want to move virtual machines into a resource pool following a failover. Note that this script is a basic example and requires some configuration, as noted in the comments of the script:
 

##The following are a list of requirements for this script:
##    - This script must be present in the same directory on both sites ##      listed in the Manage VPGs dialog
##    - PowerShell v2.0 installed on both Zerto Virtual Managers
##    - VMWare PowerCLI installed on both Zerto Virtual Managers
##
##This script was written by Zerto Support and is used at the customer's##own risk and discretion.
##
##Note: The desired resource pool MUST exist on the vCenter Server prior to ##running this script.
##
##To run this script from the VPG screen, an example command is'powershell.exe' with the parameter 'C:ZertoScriptsMove-VMs.ps1'
 
##
##START OF SCRIPT
##
##PowerCLI requires remote signed execution policy - if this is not
##enabled, it may be enabled here by uncommenting the line below.
 
##Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Force
 
##Below are the variables that must be configured.
 
##Variables:
 
##The location of this script
$strMoveScriptLoc = "C:Zerto Scripts"
 
##vCenter IP address
$strVCenterIP = "10.10.10.10"
 
##vCenter user account to use; account must have the ability to move thedesired machines
$strVCUser = "Administrator"
 
##vcenter user password
$strVCPw = "password"
 
##Name of resource pool in vCenter
$strResPool = "ResourcePool"
 
##Array of VMs to move - this list should include ALL virtual machines inthe VPG and is case sensitive.
$strVMtoMove = @("VM-1", "VM-2", "VM-3")
 
##The PowerCLI snap-in must first be registered
Add-PSSnapin VMware.VimAutomation.Core
 
##Move to directory where script is located
CD $strMoveScriptLoc
 
##Connect to target VC server based on variables above
Connect-VIServer -Server $strVCenterIP -Protocol https -User $strVCUser -Password $strVCPw
 
##execute the move for each VM specified
 
foreach ($objVM in $strVMtoMove){
    Move-VM -VM $objVM -Destination $strResPool }
 
##Disconnect from session with VC server
Disconnect-VIServer -Server $strVCenterIP -Force
 
##End of script

 

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