Checking for file from iRule?

Another option would be to use priority groups and a health check which looks for a file on the server which is available over HTTP(S). The monitor would check that file for an UP message and mark the pool member up. If the server admin modifies the file or the web server is down, the file wouldn't be served and the monitor would mark the pool member down. You could use priority groups on the pool so that your normal production servers would handle all requests unless some or all of them were down. In that case, the lower priority pool members would be used.

 

 

This option would only be efficient for one click changes if the servers' content is pushed via a CMS.

 

 

Aaron