---
title: Config entries
---

Config Entries are configuration data that are persistently stored by Home Assistant. A config entry is created by a user via the UI. The UI flow is powered by a [config flow handler](config_entries_config_flow_handler.md) as defined by the component. Config entries can also have an extra [options flow handler](config_entries_options_flow_handler.md), also defined by the component.

## Lifecycle

| State | Description |
| ----- | ----------- |
| not loaded | The config entry has not been loaded. This is the initial state when a config entry is created or when Home Assistant is restarted. |
| loaded | The config entry has been loaded. |
| setup error | An error occurred when trying to set up the config entry. |
| setup retry | A dependency of the config entry was not ready yet. Home Assistant will automatically retry loading this config entry in the future. Time between attempts will automatically increase.
| migration error | The config entry had to be migrated to a newer version, but the migration failed.
| failed unload | The config entry was attempted to be unloaded, but this was either not supported or it raised an exception.

More information about surfacing errors and requesting a retry are in [Handling Setup Failures](integration_setup_failures.md#integrations-using-async_setup_entry).

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## Setting up an entry

During startup, Home Assistant first calls the [normal component setup](/creating_component_index.md),
and then call the method `async_setup_entry(hass, entry)` for each entry. If a new Config Entry is
created at runtime, Home Assistant will also call `async_setup_entry(hass, entry)` ([example](https://github.com/home-assistant/core/blob/f18ddb628c3574bc82e21563d9ba901bd75bc8b5/homeassistant/components/hassio/__init__.py#L522)).

### For platforms

If a component includes platforms, it will need to forward the Config Entry to the platform. This can
be done by calling the forward function on the config entry manager ([example](https://github.com/home-assistant/core/blob/f18ddb628c3574bc82e21563d9ba901bd75bc8b5/homeassistant/components/hassio/__init__.py#L529)):

```python
await hass.config_entries.async_forward_entry_setups(config_entry, ["light", "sensor", "switch"])
```

For a platform to support config entries, it will need to add a setup entry method ([example](https://github.com/home-assistant/core/blob/f18ddb628c3574bc82e21563d9ba901bd75bc8b5/homeassistant/components/hassio/__init__.py#L522)):

```python
async def async_setup_entry(hass, config_entry, async_add_entities):
    """Set up entry."""
```

## Unloading entries

Components can optionally support unloading a config entry. When unloading an entry, the component needs to clean up all entities, unsubscribe any event listener and close all connections. To implement this, add `async_unload_entry(hass, entry)` to your component ([example](https://github.com/home-assistant/core/blob/f18ddb628c3574bc82e21563d9ba901bd75bc8b5/homeassistant/components/hassio/__init__.py#L534)).

For each platform that you forwarded the config entry to, you will need to forward the unloading too.

```python
await self.hass.config_entries.async_forward_entry_unload(self.config_entry, "light")
```

If you need to clean up resources used by an entity in a platform, have the entity implement the [`async_will_remove_from_hass`](core/entity.md#async_will_remove_from_hass) method.

## Removal of entries

If a component needs to clean up code when an entry is removed, it can define a removal method:

```python
async def async_remove_entry(hass, entry) -> None:
    """Handle removal of an entry."""
```

## Migrating config entries to a new version

If the config entry version is changed, `async_migrate_entry` must be implemented to support the migration of old entries. This is documented in detail in the [config flow documentation](/config_entries_config_flow_handler.md#config-entry-migration)

```python
async def async_migrate_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> bool:
    """Migrate old entry."""
```

## Modifying a config entry

A `ConfigEntry` object, including the data and options, must never be mutated directly by integrations, instead integrations must call `async_update_entry`, the use of which is illustrated in the [config flow documentation](/config_entries_config_flow_handler.md#config-entry-migration).
