26 lines
1.3 KiB
Markdown
26 lines
1.3 KiB
Markdown
---
|
|
author: Stefan Agner
|
|
authorURL: https://github.com/agners
|
|
title: New limits for Supervisor Add-ons
|
|
---
|
|
|
|
With Home Assistant OS 10, we update to the latest Docker release 23.0. With the
|
|
new Docker version the maximum number of open file descriptors for add-ons
|
|
changed to infinity (sort of).
|
|
|
|
If you are an add-on developer and experience out-of-memory issues on Home
|
|
Assistant OS 10, you can apply the old limit by using `ulimit -n 1048576` before
|
|
starting your service.
|
|
|
|
Background: During Home Assistant OS release candidate phase, the higher limit turned out to
|
|
be problematic for several add-ons (Node-RED, Network UPS Tools, and the EMQX
|
|
MQTT broker, see [Home Assistant OS issue #2438](https://github.com/home-assistant/operating-system/issues/2438)).
|
|
In all cases, the problems manifested as an out-of-memory error,
|
|
where it worked on the same hardware as the previous Home Assistant OS release. Also
|
|
in all three cases, memory got allocated dynamically depending on the number of
|
|
open file descriptors allowed (which can be determined via `prlimit64` syscall,
|
|
which returns a limit of 1073741816).
|
|
|
|
We considered returning to the old limit; however, according to the change
|
|
in the Docker (moby) repository using infinity as a limit has less overhead.
|
|
Therefore we decided to stick with the new default. |