Log2Ram

Like ramlog for systemd (on debian 8 jessie for example).

Usefull for RaspberryPi for not writing on the SD card all the time. You need it because your SD card doesn't want to suffer anymore!

Explanations: The script creates a /var/log mount point in RAM. So any writing of the log to the /var/log folder will not actually be written to disk (in this case to the sd card for a raspberry card) but directly to RAM. By default, every hour, the CRON will launch a synchronization of the RAM to the folder located on the physical disk. The script will also make this copy of RAM to disk in case of machine shutdown (but cannot do it in case of power failure). This way you avoid excessive writing on the SD card.

The script log2ram can work on every linux system. So you can use it with your own daemon manager if you don't have systemd.

Log2Ram is based on transient log for Systemd here : A transient /var/log

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Menu

1. Install
2. Upgrade
3. Customize
4. It is working ?
5. Uninstall

Install

curl -Lo log2ram.tar.gz https://github.com/azlux/log2ram/archive/master.tar.gz
tar xf log2ram.tar.gz
cd log2ram-master
chmod +x install.sh && sudo ./install.sh
cd ..
rm -r log2ram-master

REBOOT before installing anything else (for example apache2)

Upgrade

You need to stop log2ram (service log2ram stop) and start the install.

Customize

variables :

In the file /etc/log2ram.conf, there are three variables:

• SIZE: defines the size the log folder will reserve into the RAM (default is 40M).
• USE_RSYNC: Can be set to true if you prefer ´rsync´ rather than ´cp´. I use the command cp -u and rsync -X, I don't copy the all folder every time for optimization.
• MAIL: Disables the error system mail if there is not enough place on RAM (if set to false)

refresh time:

By default Log2Ram writes to the HardDisk every hour. If you think this is too much, you can make the write every day by moving the cron file to daily: sudo mv /etc/cron.hourly/log2ram /etc/cron.daily/log2ram.

It is working?

pi@raspberrypi:~ $ mount | grep log2ram
log2ram on /var/log type tmpfs (rw,nosuid,nodev,noexec,relatime,size=40960k,mode=755)

pi@raspberrypi:~ $ df -h /var/log
Filesystem      Size  Used Avail Use% Mounted on
log2ram          40M   10M   31M  25% /var/log

The log for log2ram will be written at: /var/log/log2ram.log

Now, muffins for everyone!

Uninstall :(

(Because sometime we need it)

chmod +x /usr/local/bin/uninstall-log2ram.sh && sudo /usr/local/bin/uninstall-log2ram.sh