I am tracking a set of servers as being either up or down. Each is tagged by the region it is in and a name.
In influxdb, I would expect to write the up/down notifications (can be 1/0 or whatever makes sense), each tagged with the region and the server name and, of course, the time of the observed state change. Note that it makes sense here to write the state changes, not a continuous update of the state. Consequently I might have data in influxdb that looks like this:
I would like to chart the NET number of servers that are up and/or down over time in a region. This means for the above dataset, for the us-west region, I would expect to see 1 in the up category from 2017-01-01T17:00:00 through until 2017-01-02T17:00:00 when it would show 2, then drop down to 1 again at 2017-01-05T01:00:00 and stay there moving forwards.
I’m hoping this forum might have a solution - after considerable experimentation with dashboard options I am at a bit of a loss as to whether this is feasible.