Tracy Boggiano shows off a script which checks Availability Group status of selected servers:
My favorite thing to automate using PowerShell is checking on the status of things on multiple servers. For example, after patching your environment running a quick query to make sure the version number is the same. In this example, we will use a cmdlet my coworker wrote in combination in my cmdlet to check the health of all the Availability Groups across our landscape or you could use it just check one. After all I do consider myself to be an HA/DR nut.
I’ve blogged about my coworker’s Get-CmsHost cmdlet before but now he has and shared it on github so you can read more about here.
In my cmdlet I use the same code that used in the SSMS AG dashboard to check the status of my Availability Groups.
Tracy includes her cmdlet as well as several example calls.