The Set-ExecutionPolicy changes the user preference for the execution policy of the shell. The execution policy is part of the security strategy of Windows PowerShell. It determines whether you can load configuration files (including your Windows PowerShell profile) and run scripts, and it determines which scripts, if any, must be digitally signed before they will run.
In the case of changing the power state from within the VI Web Access interface, a number of configuration options are available in terms of what actually happens when the power state is changed (for example when the VI Web Access power off button is clicked) and also which VMware Tools scripts are triggered within the guest operating system.
Vmware scripts
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If a virtual machine is configured to use VMware Tools scripts then either the default scripts installed with VMware Tools, or custom scripts may be used. On Windows based guest operating systems, the default scripts take the form of Windows Batch files and are located in \Program Files\VMware\VMware Tools. On Linux guests the default scripts are shell scripts and reside in /etc/vmware-tools. On both guest types the files are descriptively named poweroff-vm-default, poweron-vm-default, resume-vm-default and suspend-vm-default.
A review of the content of these scripts using a text or programming editor will reveal that by default they actually do very little. For example, with the exception of suspend and resume, the Windows VMware Tools scripts contain nothing but a couple of comment lines. The real power of the VMware Tools scripts is the ability to configure custom scripts.
As described in the previous section, the default scripts provided may be overridden using custom scripts. Custom scripts may be created either by modifying the default scripts, or by creating new scripts and configuring VMware Tools to use the new script in place of the default script. Custom scripts may be edited using any suitable text or programming editor, or by using the Edit... button located on the Scripts tab of the VMware Tools control panel (for more details on the VMware control panel read The VMware Tools Control Panel chapter of this book). Note that the use of the control panel script editing feature on Linux will require knowledge of the vi editor. Those lacking the necessary skills with vi should consider directly creating and editing the custom scripts using their preferred editor outside the context of the control panel.
If custom scripts are being created outside of the VMware Tools control panel (and are new files rather than modifications to the existing default scripts) it will be necessary to configure VMware Tools to use these scripts. To achieve this, open the VMware Tools control panel, select the Scripts tab and choose the appropriate power state from the drop down menu. Ensure that Use scripts and Custom Script are both selected, use the Browse feature to navigate to and select the new custom script and click on OK to apply the change.
In addition to the scripts outlined above, an additional mechanism is provided on Linux, Solaris and FreeBSD guests for executing commands when a virtual machine is either shut down or rebooted. These are specified in the /etc/vmware-tools.conf file using the halt-command = and reboot-command = directives.
For those who may not be familiar with Microsoft PowerShell, in brief, it is a scripting language from Microsoft that was first released in 2006 and has grown in popularity since then. Historically in computing, a non-graphical software program that lets end users interact with the operating system has been referred to as a "shell". PowerShell can be used interactively, or scripts can be written and executed directly or by a scheduling mechanism. It has many built-in capabilities for some things, like administering computers running a version of the Windows Operating System, but to work with things like VMware, extensions or "modules" are needed.
Items that can be executed in PowerShell are referred to as "cmdlets" (short for "commandlets", either built-in or provided by modules), functions, and scripts. At first, PowerShell might appear to be just another text-based command line shell, but it is built on the Microsoft .NET Common Language Runtime (CLR), and all inputs and outputs are .NET objects. You will soon see how this makes PowerShell, and hence, PowerCLI, very powerful.
See the documentation for the slaxml library. http.host, http.max-body-size, http.max-cache-size, http.max-pipeline, http.pipeline, http.truncated-ok, http.useragent See the documentation for the http library. smbdomain, smbhash, smbnoguest, smbpassword, smbtype, smbusername See the documentation for the smbauth library. Example Usage nmap --script vmware-version -p443 Script Output vmware-version: Server version: VMware ESX 4.1.0 Build: 348481 Locale version: INTL 000 OS type: vmnix-x86_ Product Line ID: esx Requires http nmap shortport stdnse table Author:Alexey TyurinLicense: Same as Nmap--See -legal.html
Once the assemblies have been added, the developer can instantiate a PowerShell runtime instance and begin to add scripts to it. In the following function, vCenter is queried for information regarding the Hypervisor hosts. The information is parsed and then stored in the file hypervisors.xml.
Figure 5: Sample datagrid that displays the XML data. In this post, I examined some administrative task automation possibilities involving .NET, PowerShell and PowerCLI. There are many more possibilities for automation utilizing these tools. With the example provided here, one can see that its relatively straightforward to execute PowerShell scripting programmatically. Utilizing any GUI, such as a web interface, enables non-technical users the ability to run PowerShell scripts on demand.
As a continuation of my efforts from my previous post about VirtualBox with VMware, I wanted the VM to be part of auto power on and off process. After I enabled the setting on the VM (Automating the process of starting and stopping virtual machines on VMware ESX\ESXi (850), I realized vmware-tools would just send a guest shutdown command to the VM and the Gentoo would just shutdown the OS without gracefully shutting down any VMs running in VirtualBox. So I decided to fix that.
Another thing to do is to enable vmware-tools logging so you can confirm vmware-tools is running the scripts (I found the settings in Enabling debug logging for VMware Tools within a guest operating system (1007873):
Ultimately, my use case was slightly different and I also did not need all the bells and whistles such as configuring Application Virtual Networks (VCN) and this also meant that I could dramatically simplify the deployment. For example, instead of deploying the ESXi hosts from scratch, I could simply take advantage of my Nested ESXi Virtual Appliance and use that as a starting point. For those familiar with my various PowerCLI automated lab deployment scripts, I have created a simliar experience for VCF that will deploy a set of Nested ESXi Appliances along with the VMware Cloud Builder appliance, which is then used to deploy VCF on top of the Nested ESXi VMs. To ensure the user experience is as painless and simple, I also use the customer supplied configurations within the script to automagically generate the VCF configuration JSON file that can then be uploaded directly to the Cloud Builder appliance to begin the VCF deployment once the initial infrastructure has been deployed by the automation script.
" Host preparation failed with the following errors: com.vmware.evo.sddc.common.hostservices.error.HostPreparationException: Failed to delete partitions on ESXi host vcf-m01-esx01. com.vmware.evo.sddc.common.hostservices.error.HostPreparationException:Failed to delete partitions on ESXi host vcf-m01-esx02. com.vmware.evo.sddc.common.hostservices.error.HostPreparationException:Failed to delete partitions on ESXi host vcf-m01-esx03.. com.vmware.evo.sddc.common.hostservices.error.HostPreparationException:Failed to delete partitions on ESXi host vcf-m01-esx04.
You can use this script I just wrote -Getachew/vmbackuputil.git. It loops through multiple virtual machines in Virtualbox (I'm sure you can do some modifications for vmware) and backs them up to a remote server. You can delete the bottom half of the script and just get the OVA files. 2ff7e9595c
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