In this post, we recap some new material that you might have missed in the past week or so. Check in next week for the most interesting TICK-stack related issues, workarounds, how-tos, and Q&A from GitHub, IRC, and the InfluxData Community.
Managing alert history in Chronograf
Q: I’m using Chronograf to create alert rules and monitor my infrastructure. My Alert History page shows a lot of alert occurrences; I can narrow down the occurrences with the filter box and the time range selector, but is there a way to expire the occurrences that I no longer need?
A: There is! Chronograf stores the information on the Alert History page as time series data in InfluxDB. It stores it in the
chronograf database and in the
alerts measurement. By default, those data are subject to an infinite retention policy (RP), that is, InfluxDB stores them forever. To expire your alert history data, just shorten the duration of that RP.
We recommend using Chronograf’s Admin page to modify the retention policy in the
chronograf database. In the Databases tab:
1: Locate the
chronograf database and click on the infinity symbol (∞)
2: Enter a different duration
The minimum allowable duration is one hour (
1h) and the maximum is infinite (
INF). See the InfluxDB documentation for the list of acceptable duration units.
3: Click the green check mark to save your changes
That’s it! InfluxDB only keeps data in the
chronograf database that fall within that new duration; the system automatically deletes any data with timestamps that occur before the duration setting.
Writing data with Chronograf
A: Starting with version 220.127.116.11, Chronograf’s Data Explorer supports writing data to your InfluxDB databases.
To write data with Chronograf, click the
Write Data icon at the top of the Data Explorer page and select your target database. Next, enter your line protocol in the main text box and click the
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