Hmm, I am wondering which doc did you refer to, and did not think the current geronimo-web.xml will work in Geronimo 2.1.*.
For the virtual host in Geronimo 2.2.*,  the doc url is  https://cwiki.apache.org/GMOxDOC22/configuring-virtual-host-in-tomcat.html.
If you really would like to use container-config to configure the virtual host, the namespace should be corrected,
--->
<web:container-config>
     <tomcat
xmlns="http://geronimo.apache.org/xml/ns/j2ee/web/tomcat-2.0.1">   <---    <tomcat xmlns="http://geronimo.apache.org/xml/ns/web/tomcat/config-1.0">
       <host>testhost1.vhainc.local</host>
     </tomcat>
   </web:container-config>
<---

2012/1/24 Radim Kolar <hsn@sendmail.cz>
> I started with 2.2, tried 2.1 and tried standalone Tomcat 6.
In 2.1 virtual hosts works, follow documentation on website.




--
Ivan