As DNS admin it is useful to know how to both view and clear the cache of a Bind server. This can be for a number of reasons but for me its often down to slow DNS lookup, which leads to a sluggish web experience. This is often caused by an issue with the cache,... Continue Reading →
Skipping tags in Puppet
Most people know about the --tags argument to puppet agent execute specific parts of the manifest. '--tags' allows you to specify what portions of a configuration you want to apply. Puppet elements are tagged with all of the class or definition names that contain them, and you can use the 'tags' flag to specify one... Continue Reading →
XenServer Monitoring
Problem: We want to monitor XenServer health in Opsview. Overview: Because installing unapproved software on XenServer / Citrix Hypervisor can impact your support arrangement with Citrix we have to look for other means of monitoring our hypervisor estate. There are a number of options, the one I am going to cover here is for basic... Continue Reading →
WillowSphere 