It seems every time that I have a customer who wants to setup Kerberos, it is into a farm that already exists. So I had to put these steps together for SharePoint 2010 recently for a customer and thought I would share it with all of you.
If your running Windows 2008 you need this
A Kerberos authentication fails together with the error code 0X80090302 or 0x8009030f on a computer that is running Windows Server 2008 or Windows Vista when the AES algorithm is used (http://support.microsoft.com/kb/969083)
Articles of interest
Review for known issues
Info to gather
Steps to follow to enable Kerberos for Web Application and SSRS
Select s.session_id, s.login_name, s.host_name, c.auth_scheme From sys.dm_exec_connections c inner join sys.dm_exec_sessions s on c.session_id = s.session_id
$w = Get-SPWebApplication -Identity http://portal$w.GrantAccessToProcessIdentity("vmlab\svcSQLRS")
Using Site Settings configure Site Collection to host a report
Create and publish a report to your Site Collection
Hope you find this helpful.
Thanks for putting this list of steps together. This post is in my Favs now.