Home Assistant Community

MariaDB addon


Hi all!

First of all I want to say that I love Homeassistant and Hassio so thank you all for developing this great software.

I migrated from my old home assistant installation (raspberry pi 3) to hassio and I experienced a couple of problems.
I’m wondering where I can find the mariaDB database file. When I login trough SSH I couldn’t find it anywhere. Also, the mysql command returns an error so it’s unusable. I would like to see the mariaDB database to check it’s size since hassio is becoming slower and i think the database is getting too big.

The error i get when putting in the mysql command:
“➜ / mysql homeassistant
ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/run/mysqld/mysqld.sock’ (2 “No such file or directory”)”

Also, my apple tv stopped responding. It says: “Establishing connection to apple tv”. Before updating to hassio it worked perfectly. Authenticating after scanning works perfectly but it doesn’t work in my frontend.

I’m working with home assistant 0.52.1 at the moment.

Thank you all for your feedback!
Kind regards,


Nobody with the same problems?


Hi @Filip, i’m running hass.io only for testing on a Virtualbox VM (ubuntu 16.04).
If i’m on the ubuntu host, i can find the database in:

When i connect to the maria_db container with:
docker exec -i -t addon_core_mariadb /bin/sh, they are in:
Don’t know if it’s the same for Hass.io image for raspberry.
Hope that helps!


Hi @VDRainer!

Thank you very much for your help!
Couldn’t find it in: /usr/share/hassio/addons/data/core_mariadb/databases/.

I’m connecting to my raspberry pi 3 through ssh on an external computer.
When i go to /usr/share/ i can’t find the hassio directory.

These are the files in /usr/share/ on my installation.

. git-core nano terminfo
… icons ncat vim
apk man nmap zoneinfo
applications misc perl5 zsh
ca-certificates mysql tabset

Again, thanks for your input. :wink:


HI @Filip

did you ever find your MariaDB? Cant find a clue, so hoped you had luck before me…



Did anyone ever find the location for mariadb database files in Hassio on an RPi3? I have also looked everywhere and have come up empty. Just a bunch of threads of other people looking for the same, but no answers! I can’t believe this information is not available.

This is no help. https://mariadb.com/kb/en/library/default-data-directory-for-mariadb/


Agreed! Where the hell is this thing? Helpppppppppppppppp


Another vote for finding this stupid thing. Need to purge it since the purge command from Hassio is not working for me.


I’m not totally sure about the hassio architecture so I cannot explain the details, but if what you want/need is just to connect to MariaDB you can use the following command:


Default values are:
mysql -u hass -pPASSWORD -h 192.168.1.XX homeassistant

That is enough for me to connect to mariaDB in the RPI3.

Hope it helps.

1 Like

Never found it I’m sorry.


I use PHPMyAdmin to maintain my MariaDB database, this will allow yo uto remove data.

1 Like

I’m not practical to use this SQL tools.
Can you explain me how to do something like the purge leaving data only for the last X days?
Also which tables need to be considered.



When I have had DB problems in the past, I usually use PHPMyAdmin to backup and completely remove the old HA database, and make a new database entirely, then update my HA config to use the new DB and this fix works for me.

I’m sure there is an SQL query that will remove values older than a certain date, Im’ not an SQL wiz either.

1 Like