To create a graph view based on Hashtags, click on the 'Configure'
button within Graph Center and then click on 'Service Check', as shown below:
Once clicked, you will be presented with a configuration window, similar to the screen below:
The first section allows you to choose EITHER a Host Template OR one or more Service Checks. When you have selected your Host Template or your Service Check(s), as we have above with the selection of the 'OS - Unix Base' Host Template, the 'Options' section on the right will repopulate with the Hosts which have the selected Host Template/Service Checks, as shown below:
By default, the 'All' radio button is selected - meaning all Hosts that have the 'OS - Unix Base' Host Template applied will be selected. You can also choose the 'Select Host' radio button which allows you to select one or more individual Hosts:
After selecting your hosts, or clicking 'All', simply click 'Apply' and the graph view will be created, as shown below: