Host Log Retention max entires

[antoweb]

trafficstars

Describe the issue you are experiencing

Today my Raspberry restart itself, I wanted to investigate the case but when I go to see the Host logs I noticed that the dmesg log starts from the start. Can't configure or even retrieve logs before reboot to pinpoint the problem?

What is the used version of the Supervisor?

supervisor-2021.04.3

What type of installation are you running?

Home Assistant OS

Which operating system are you running on?

Home Assistant Operating System

What is the version of your installed operating system?

5.13

What version of Home Assistant Core is installed?

core-2021.5.5

Steps to reproduce the issue

...

Anything in the Supervisor logs that might be useful for us?

[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd083]
[    0.000000] Linux version 5.4.83-v8 (builder@3b343e44eee4) (gcc version 9.3.0 (Buildroot -gdd4918c8)) home-assistant/supervisor#1 SMP PREEMPT Thu Apr 1 18:30:43 UTC 2021
[    0.000000] Machine model: Raspberry Pi 4 Model B Rev 1.4
[    0.000000] efi: Getting EFI parameters from FDT:
[    0.000000] efi: UEFI not found.

Additional information

No response

[agners]

You can get the logs from the previous boot on the OS level shell. You need to use the terminal and login as root, then type login to get to the shell, or use SSH access (see https://developers.home-assistant.io/docs/operating-system/debugging how to enable this).

From there, you can use journalctl, e.g. journalctl -b -1 gets all the logs of the previous boot.

[agners]

That said, it would be nice to have access to previous logs in Supervisor. I'll label this issue as enhancement. Please open a new issue once you were able to get the logs of the reboot issue.