Gradually turn on lights.

[Talisker]

I updated to the latest version of Reactor this morning. I run reactor (successfully) on a Raspberry PI 4 4GB with SSD 64GB. I also run Home Assistant in Docker. After updating I noticed a disk space critical error warning!

I have tried purging the docker install (docker image prune -a)

I have rebooted the Raspberry PI also, and the error messages keep coming.

I have the following disk space:

How do I free up space?

Any help would be appreciated.

[toggledbits]

READ ALL BEFORE DOING ANYTHING -- DO NOT RESTART REACTOR UNTIL YOU"VE CLEARED SOME SPACE

Use sudo su - to open a root shell (so you don't have to sudo in front of the rest of the commands here).

Go to the root directory and find out what path is consuming the lion's share of space...

cd /
du -sk * | sort -n

The second command will give you the size of every directory under /, sorted by size. You may have a very large var, and so go into that and repeat the command:

cd var
du -sk * | sort -n

The log subdirectory (full path /var/log) is always suspect, particularly on long-running systems. You can remove extraneous or old log files from this directory safely (new logs will be created after you eventually reboot, but don't do that yet). The /var/cache/apt directory can also get large, so running apt clean will usually purge that cache and make space available.

You can repeat wandering into directories and using du -sk * | sort -n to find the biggest consumers.

If you are running InfluxDB, you may need to set a purge policy (I forget what they actually call it) on your databases. That's in their documentation.

If your /var/lib/docker directory is still a big consumer, you can also try docker container prune -f and docker image prune -f.

Also, you may have a 64GB SSD, but your root volume is only 16GB. You can try running raspi-config, choosing Advanced Options in the menu, and then Expand Filesystem. Are you sure you are booted from the SSD? You've removed any Micro-SD card entirely, right?

And hopefully you've been doing backups, as filesystem full can lead to file corruption (i.e. OS or app can't write all of a file).

[RHCPNG]

I've got the same message, but my disk is not full.

Am I missing something?

I just did a recreate of the container with a new pull. I'm on docker 23078.

Is the threshold set to 90%. That would explain the error of course, but there is still 2 gb free.

[RHCPNG]

It was not the space in the docker but the mounted volume, although it still had more than 2gb of space. So it complains a little bit early, but it has been resolved for me.

[toggledbits]

Reading: https://reactor.toggledbits.com/docs/SystemController/

[RHCPNG]

@toggledbits said in Critical Disk Space Warning:

Reading: https://reactor.toggledbits.com/docs/SystemController/

Splendid. You think of everything! Forgot about that.