History Explorer

TODO: Describe the history explorer, example usage.

The history explorer is a tool for collecting and downloading cluster reports, which include logs and other information for a certain timeframe. The history explorer is also useful for analysing such cluster reports. You can either upload a previously generated cluster report for analysis, or generate one on the fly.

Once uploaded, you can scroll through all of the cluster events that took place in the time frame covered by the report. For each event, you can see the current cluster configuration, logs from all cluster nodes and a transition graph showing exactly what happened and why.

Create / Upload

From the History Explorer pane, it is possible to create new history reports and upload a previously created report. A list of all created reports appear below, which options to view or download each report.


Viewing a Report

When viewing a report, the interface presents a list of Transitions that occurred during the time frame covered by the report. These Transitions are changes in the cluster state. Either they are triggered by changes in the configuration, or something happened like a resource failure or a node failure, and the cluster reacted to it in some way.

Below the transition list, there is a list of node and resource events. The history explorer analyses the given report and tries to sift out the key events so that finding the interesting section of the report is made a bit easier.



The embedded video is somewhat outdated, and shows the history explorer as it looked in Hawk 1. However, it may be a good introduction to the basic functionality of the history explorer.