[arm-allstar] ARM-allstar Digest, Vol 106, Issue 13

[Mark VE3JMR]

Hi David;

That works great! I'm not that concerned about the log files getting too 
big. 1. I have a script that is triggered by a daily cronjob that trims 
all of the logs to the maximum size (number of lines) that I specify; 2. 
Supermon2 shows the size of the logs and how much of the max size has 
been used. IF it maxes out I know to adjust the trimlog cronjob.

Logs file size brings up an interesting observation. Before I modified 
the two files for persistent logging, Supermon always reported that 2%, 
and if I ran it for many days up to 4%, of the max file size was used. 
After I modified the files and rebooted, Supermon now reports that 56% 
of the log file max has been used. Really? I did not expect this. FYI, I 
use a 32G microSD in my Shari hotspot.

Thanks again.

> Date: Wed, 15 Mar 2023 09:29:43 -0400 (EDT)
> From: David McGough <kb4fxc at inttek.net>
> To: Mark VE3JMR via ARM-allstar <arm-allstar at hamvoip.org>
> 
> Hi Mark,
> 
> Okay, persistent logging to the SD card is easy to setup, there are 2
> steps.
> 
> First, edit the /etc/systemd/journald.conf file and change:
> 
> [Journal]
> Storage=volatile
> 
> ...to...
> 
> [Journal]
> #Storage=volatile
> Storage=persistent
> 
> ...and save the file.
> 
> Second, edit the /etc/fstab file and comment out the entry for the
> /var/log tmpfs, like:
> 
> #
> # /etc/fstab: static file system information
> #
> # <file system> <dir>   <type>  <options>       <dump>  <pass>
> /dev/mmcblk0p1  /boot   vfat    defaults        0       0
> #tmpfs          /var/log        tmpfs   nodev,nosuid,size=50M   0       
> 0
> 
> ....Save the /etc/fstab file and reboot.   That's it!  Now, the 
> logfiles
> will all be in /var/log and that folder will be persistent across 
> reboots.
> 
> NOTE:  Now /var/log is part of the system "root" filesystem. If the
> logfiles get too big, they could leave the root filesystem full, 
> impairing
> system operation until they get cleaned up!!!  So, be careful!
> 
> If you decide to go back to volatile log files, just reverse the 
> changes,
> above, and reboot.
> 
> 73, David K4FXC
> 
> ********************************************
> 
> Thanks so much.
> 
> 73 75 de VE3JMR | VE3MR
> Mark
> Port Colborne, Ontario, CANADA
> https://www.qrz.com/db/VE3JMR
> Allstar# 531320 [1] | Echolink# 736666 | VE3JMR-L [2]
> 
> [3]    [4]    [5]
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> 
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> <if trumpet=%true then exit function>


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