OpenWRT version needs shorter query log retention options due to free space limitations

[egalitarian]

Prerequisites

Please answer the following questions for yourself before submitting an issue. YOU MAY DELETE THE PREREQUISITES SECTION.

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed

Problem Description

The smallest query logs retention setting of 24h still creates a log far too big for most OpenWRT devices filling up all of the available space.

Proposed Solution

Adding option for 1h or any other smaller than 24h would allow to check all latest queries and still be of some use when debugging problems.

Alternatives Considered

An alternative would be to stop logging altogether and just start it from when you debug things but that would be more inconvenient.

Additional Information

[emlimap]

Another option that would be good to have rather than completely disable logging is to have limited in memory logs. This feature would be useful to extend the lifetime of sd card on SBC's like Raspberry Pi by not writing any logs to disk but have enough logs to troubleshoot blocked domains. Amount of logs held in memory can be set by user.

There is already a parameter querylog_size_memory which set the number of logs to queue up before it writes to disk. We could use this but not write to disk when logging is completed disabled

[ameshkov]

Another option that would be good to have rather than completely disable logging is to have limited in memory logs

As I recall, that's exactly what happens when querylog_file_enabled is set to false

[agneevX]

Can this be documented in Raspberry Pi install instructions, @ameshkov? Would help users to a great extent, thanks.

[EugeneOne1]

@egalitarian, you may now set 6h value for query logs retention period. It's available in the latest edge builds and in beta builds since v0.107.0-b.4. Could you please check if it fixes the situation?

[EugeneOne1]

We'll close the issue for now. Please, feel free to reopen it if you'll face any problems with it.