Now that I have talked about displaying event log information and virtual machine health information; the next part of my status email is storage health information.
In my experience – the most common failure for my servers is a failed hard disk. Now, as I have multiple levels of redundancy configured in my storage configuration, it is not always obvious that a disk has failed. Luckily, it is very easy to get this information with PowerShell.
In fact, this is one of the primary reasons why I like using storage spaces. The great integration with PowerShell. Here is the code that I use to generate this table:
# Storage Health$message = $message + ""$message = $message + "Storage Health
"$message = $message + "Physical Disk Health:
" + ((Get-PhysicalDisk | ` Select-Object @{Expression={$_.FriendlyName};Label="Physical Disk Name"}, ` @{Expression={$_.DeviceID};Label="Device ID"}, ` @{Expression={$_.OperationalStatus};Label="Operational Status"}, ` @{Expression={$_.HealthStatus};Label="Health Status"}, ` @{Expression={"{0:N2}" -f ($_.Size / 1073741824)};Label="Size (GB)"} `| ConvertTo-HTML -Fragment) `
| %{if($_.Contains("OK Healthy ")){$_.Replace("", "background-color:$($tableColor)`">")}else{$_}}) ` + "
"$message = $message + "Storage Pool Health:
" + ((Get-StoragePool | ` where-object {($_.FriendlyName -ne"Primordial")} | ` Select-Object @{Expression={$_.FriendlyName};Label="Storage Pool Name"}, ` @{Expression={$_.OperationalStatus};Label="Operational Status"}, ` @{Expression={$_.HealthStatus};Label="Health Status"} ` | ConvertTo-HTML -Fragment) `
| %{if($_.Contains("OK Healthy ")){$_.Replace("", "background-color:$($tableColor)`">")}else{$_}}) ` + "
"$message = $message + "Virtual Disk Health:
" + ((Get-VirtualDisk | ` Select-Object @{Expression={$_.FriendlyName};Label="Virtual Disk Name"}, ` @{Expression={$_.OperationalStatus};Label="Operational Status"}, ` @{Expression={$_.HealthStatus};Label="Health Status"} ` | ConvertTo-HTML -Fragment) `
| %{if($_.Contains("OK Healthy ")){$_.Replace("", "background-color:$($tableColor)`">")}else{$_}}) ` + "
"Notes about this code:
- I am using “Get-PhysicalDisk”, “Get-StoragePool” and “Get-VirtualDisk” to gather the raw data.
- Once again - I use raw HTML to set the color of the table headers.
- Again - I run the output of these commands through Select-Object with the use of the “Expression” option to set column labels appropriately.
- Again - I use ConvertTo-HTML –Fragment to get a nice HTML table outputted.
- Again – I implement color coding for individual entries in the table. I set each table cell to be “red” by default. I then do some string parsing to see if the health is good – and switch the background color if I get a positive result.
Cheers,
Ben
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