There are only 6 main steps to achieve this task assuming you already have an instance of SQL Server Reporting Services and SharePoint 2010.
I had created this starting from a clean installation of SQL Reporting Services so this guide will discuss the steps on configuring your SQL Reporting Services 2008 for integration with SharePoint 2010.
Step 1: Configuring SQL Reporting Services – Web Service URL
Simply go to Reporting Services Configuration Manager and choose Web Service URL and populate the following needed information. The fields are named properly so I guess there is no need for further explanation. What this does is that it configures the IIS for you depending on what Virtual Directory names you had declared.
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Step 2: Configuring SQL Reporting Services – Create a Report Database
Same here, fields need no further explanation except for one which is Native Mode and SharePoint Integrated mode which I will explain below.
Choose create a database or if you already have one choose an existing one. For this example, we will create a new one:
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Connect to the database where you want your Report Data to be stored:
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Give it a Name and a Report Server Mode.
With SharePoint Integrated Mode the report RDLs are stored on SharePoint and not in the Report Database. For this instance, we will use the SharePoint Integrated Mode:
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Specify the credentials that the report server will use to connect to the database.
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Review your configuration.
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Then wait while it's configured.
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Step 3: Configuring SQL Reporting Services – Create a Report Manager URL
What this does is that it configures the IIS for you depending on what Virtual Directory names you had declared.
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That’s it. At this point, your report server is configured for SharePoint Integration 2010.
Step 4: SharePoint Integration Configuration – Reporting Services Integration
Simply go to SharePoint 2010 Central Administration, then General Application Settings, then choose Reporting Services Integration.
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Now populate the fields using the Web Service URL you had configured a while ago on Step 2 of this guide.
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Once done, you will see the Activation State message.
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Step 5: SharePoint Integration Configuration – Add a Report Server to the Integration
Now add the report server by putting the Server Name and the Server instance.
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At this point it's all done, all you have to do now is try it out.
Step 6: Verify by Checking the Server and Uploading a Report
To verify if it's now integrated, go to Site Settings on your SharePoint Site, then Site Collection Features.
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Check if the Report Server Integration Feature is Active, if not just click activate:
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Now try to use the SQL Server Reporting Services Webpart:
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Or you can also upload a report from a library.
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That's it, so simple!