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developers.home-assistant/docs/hassio_addon_config.md

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---
title: "Add-On Configuration"
---
Each add-on is stored in a folder. The file structure looks like this:
```text
addon_name/
apparmor.txt
build.json
CHANGELOG.md
config.json
DOC.md
Dockerfile
icon.png
logo.png
README.md
run.sh
```
## Add-on script
As with every Docker container, you will need a script to run when the container is started. A user might run many add-ons, so it is encouraged to try to stick to Bash scripts if you're doing simple things.
All our Images have also [bashio][bashio] installed. It contains a set of commonly used operations and can be used to be included in add-ons to reduce code duplication across add-ons and therefore making it easier to develop and maintain add-ons.
When developing your script:
- `/data` is a volume for persistent storage.
- `/data/options.json` contains the user configuration. You can use bashio or `jq` inside your shell script to parse this data.
```shell
CONFIG_PATH=/data/options.json
TARGET="$(jq --raw-output '.target' $CONFIG_PATH)"
```
So if your `options` contain
```json
{ "target": "beer" }
```
then there will be a variable `TARGET` containing `beer` in the environment of your bash file afterwards.
[bashio]: https://github.com/hassio-addons/bashio
## Add-on Docker file
All add-ons are based on latest Alpine Linux. Hass.io will automatically substitute the right base image based on the machine architecture. Add `tzdata` if you need run in a different timezone. `tzdata` Is is already added to our base images.
```dockerfile
ARG BUILD_FROM
FROM $BUILD_FROM
ENV LANG C.UTF-8
# Install requirements for add-on
RUN apk add --no-cache jq
# Copy data for add-on
COPY run.sh /
RUN chmod a+x /run.sh
CMD [ "/run.sh" ]
```
If you don't use local build on device or our build script, make sure that the Dockerfile have also a set of labels include:
```
LABEL io.hass.version="VERSION" io.hass.type="addon" io.hass.arch="armhf|aarch64|i386|amd64"
```
It is possible to use own base image with `build.json` or if you do not need support for automatic multi-arch building you can also use a simple docker `FROM`.
### Build Args
We support the following build arguments by default:
| ARG | Description |
|-----|-------------|
| BUILD_FROM | Hold image for dynamic builds or buildings over our systems.
| BUILD_VERSION | Add-on version (read from `config.json`).
| BUILD_ARCH | Hold current build arch inside.
## Add-on config
The config for an add-on is stored in `config.json`.
```json
{
"name": "xy",
"version": "1.2",
"slug": "folder",
"description": "long description",
"arch": ["amd64"],
"url": "website with more information about add-on (ie a forum thread for support)",
"startup": "application",
"boot": "auto",
"ports": {
"123/tcp": 123
},
"map": ["config:rw", "ssl"],
"options": {},
"schema": {},
"image": "repo/{arch}-my-custom-addon"
}
```
| Key | Type | Required | Description |
| --- | ---- | -------- | ----------- |
| name | string | yes | Name of the add-on
| version | string | yes | Version of the add-on
| slug | string | yes | Slug of the add-on
| description | string | yes | Description of the add-on
| arch | list | yes | List of supported arch: `armhf`, `armv7`, `aarch64`, `amd64`, `i386`.
| machine | list | no | Default it support any machine type. You can select that this add-on run only on specific machines.
| url | url | no | Homepage of the addon. Here you can explain the add-ons and options.
| startup | string | yes | `initialize` will start addon on setup of Hass.io. `system` is for things like databases and not dependent on other things. `services` will start before Home Assistant, while `application` is started afterwards. Finally `once` is for applications that don't run as a daemon.
| webui | string | no | A URL for web interface of this add-on. Like `http://[HOST]:[PORT:2839]/dashboard`, the port needs the internal port, which will be replaced with the effective port. It is also possible to bind the proto part to a config options with: `[PROTO:option_name]://[HOST]:[PORT:2839]/dashboard` and he lookup if they is True and going to `https`.
| boot | string | yes | `auto` by system and manual or only `manual`
| ports | dict | no | Network ports to expose from the container. Format is `"container-port/type": host-port`. If host-port is `null`, the mapping is disabled.
| ports_description | dict | no | Network ports description mapping. Format is `"container-port/type": "description of this port"`.
| host_network | bool | no | If that is True, the add-on run on host network.
| host_ipc | bool | no | Default False. Allow to share the IPC namespace with others.
| host_dbus | bool | no | Default False. Map Host dbus service into add-on.
| host_pid | bool | no | Default False. Allow to run container on host PID namespace. Work only for not protected add-ons.
| devices | list | no | Device list to map into the add-on. Format is: `<path_on_host>:<path_in_container>:<cgroup_permissions>`. i.e. `/dev/ttyAMA0:/dev/ttyAMA0:rwm`
| udev | bool | no | Default False. Set this True, if your container runs a udev process of its own.
| auto_uart | bool | no | Default False. Auto mapping all UART/Serial device from host into add-on.
| homeassistant | string | no | Pin a minimum required Home Assistant Core version for such Add-on. Value is a version string like `0.91.2`.
| hassio_role | str | no | Default `default`. Role-based access to Supervisor API. Available: `default`, `homeassistant`, `backup`, `manager`, `admin`.
| hassio_api | bool | no | This add-on can access to Hass.io REST API. It set the host alias `hassio`.
| homeassistant_api | bool | no | This add-on can access to Hass.io Home-Assistant REST API proxy. Use `http://supervisor/core/api`.
| docker_api | bool | no | Allow read-oly access to docker API for add-on. Work only for not protected add-ons.
| privileged | list | no | Privilege for access to hardware/system. Available access: `NET_ADMIN`, `SYS_ADMIN`, `SYS_RAWIO`, `SYS_TIME`, `SYS_NICE`, `SYS_RESOURCE`, `SYS_PTRACE`, `SYS_MODULE`, `DAC_READ_SEARCH`.
| full_access | bool | no | Give full access to hardware like the privileged mode in docker. Work only for not protected add-ons.
| apparmor | bool/string | no | Enable or disable AppArmor support. If it is enable, you can also use custom profiles with the name of the profile.
| map | list | no | List of maps for additional Hass.io folders. Possible values: `config`, `ssl`, `addons`, `backup`, `share`. Defaults to `ro`, which you can change by adding `:rw` to the end of the name.
| environment | dict | no | A dict of environment variable to run add-on.
| audio | bool | no | Boolean. Mark this add-on to use internal an audio system. We map a working PulseAudio setup into container. If you application did not support PulseAudio, you need maybe install: Alpine `alsa-plugins-pulse` or debian/ubunut `libasound2-plugins`.
| video | bool | no | Boolean. Mark this add-on touse internal an video system. All available devices will be mapped into addon.
| gpio | bool | no | Boolean. If this is set to True, `/sys/class/gpio` will map into add-on for access to GPIO interface from kernel. Some library need also `/dev/mem` and `SYS_RAWIO` for read/write access to this device. On system with AppArmor enabled, you need disable AppArmor or better for security, provide you own profile for the add-on.
| devicetree | bool | no | Boolean. If this is set to True, `/device-tree` will map into add-on.
| kernel_modules | bool | no | Map host kernel modules and config into add-on (readonly).
| stdin | bool | no | Boolean. If that is enable, you can use the STDIN with Hass.io API.
| legacy | bool | no | Boolean. If the docker image have no hass.io labels, you can enable the legacy mode to use the config data.
| options | dict | yes | Default options value of the add-on
| schema | dict | yes | Schema for options value of the add-on. It can be `False` to disable schema validation and use custom options.
| image | string | no | For use with Docker Hub and other container registries.
| timeout | integer | no | Default 10 (second). The timeout to wait until the docker is done or will be killed.
| tmpfs | string | no | Mount a tmpfs file system in `/tmpfs`. Valide format for this option is : `size=XXXu,uid=N,rw`. Size is mandatory, valid units (`u`) are `k`, `m` and `g` and `XXX` has to be replaced by a number. `uid=N` (with `N` the uid number) and `rw` are optional.
| discovery | list | no | A list of services they this Add-on allow to provide for Home Assistant. Currently supported: `mqtt`
| services | list | no | A list of services they will be provided or consumed with this Add-on. Format is `service`:`function` and functions are: `provide` (this add-on can provide this service), `want` (this add-on can use this service) or `need` (this add-on need this service to work correctly).
| auth_api | bool | no | Allow access to Home Assistent user backend.
| ingress | bool | no | Enable the ingress feature for the Add-on
| ingress_port | integer | no | Default `8099`. For Add-ons they run on host network, you can use `0` and read the port later on API.
| ingress_entry | string | no | Modify the URL entry point from `/`.
| panel_icon | string | no | Default: mdi:puzzle. MDI icon for the menu panel integration.
| panel_title | string | no | Default add-on name, but can Modify with this options.
| panel_admin | bool | no | Default True. Make menu entry only available with admin privileged.
| snapshot_exclude | list | no | List of file/path with glob support they are excluded from snapshots.
| advanced | bool | no | Default False. Make addon visible on simle mode or not.
| stage | string | no | Default `stable`. Flag add-on with follow attribute: `stable`, `experimental`, `deprecated`
| init | bool | no | Default `True`. Make it possible to disable the docker default system init because the image have his own init system.
### Options / Schema
The `options` dictionary contains all available options and their default value. Set the default value to `null` if the value is required to be given by the user before the add-on can start, and it show it inside default values. Only nested arrays and dictionaries are supported with a deep of two size. If you want make an option optional, put `?` to the end of data type, otherwise it will be a required value.
```json
{
"message": "custom things",
"logins": [
{ "username": "beer", "password": "123456" },
{ "username": "cheep", "password": "654321" }
],
"random": ["haha", "hihi", "huhu", "hghg"],
"link": "http://example.com/",
"size": 15,
"count": 1.2
}
```
The `schema` looks like `options` but describes how we should validate the user input. For example:
```json
{
"message": "str",
"logins": [
{ "username": "str", "password": "str" }
],
"random": ["match(^\w*$)"],
"link": "url",
"size": "int(5,20)",
"count": "float",
"not_need": "str?"
}
```
We support:
- str / str(min,) / str(,max) / str(min,max)
- bool
- int / int(min,) / int(,max) / int(min,max)
- float / float(min,) / float(,max) / float(min,max)
- email
- url
- password
- port
- match(REGEX)
- list(val1|val2|...)
## Add-on extended build
Additional build options for an add-on is stored in `build.json`. This file will be read from our build systems.
You need this only, if you not use the default images or need additionals things.
```json
{
"build_from": {
"armhf": "mycustom/base-image:latest"
},
"squash": false,
"args": {
"my_build_arg": "xy"
}
}
```
| Key | Required | Description |
| --- | -------- | ----------- |
| build_from | no | A dictionary with the hardware architecture as the key and the base Docker image as value.
| squash | no | Default `False`. Be carfully with this option, you can not use the image for caching stuff after that!
| args | no | Allow to set additional Docker build arguments as a dictionary.
We provide a set of [Base-Images][docker-base] which should cover a lot of needs. If you don't want use the Alpine based version or need a specific Image tag, feel free to pin this requirements for you build with `build_from` option.
[docker-base]: https://github.com/home-assistant/docker-base
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