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mirror of https://github.com/Unleash/unleash.git synced 2024-10-28 19:06:12 +01:00
unleash.unleash/website/docs/how-to/how-to-import-export.md
David Leek 61a8908694
chore: remove state service (#7184)
## About the changes

Removes the deprecated state endpoint, state-service (despite the
service itself not having been marked as deprecated), and the file
import in server-impl. Leaves a TODO in place of where file import was
as traces for a replacement file import based on the new import/export
functionality
2024-05-28 14:47:31 +02:00

6.5 KiB

title
[Deprecated] Import & Export

import ApiRequest from '@site/src/components/ApiRequest'

:::info Availability

The import and export API first appeared in Unleash 3.3.0.

:::

:::caution Deprecation notice

Api admin state is deprecated from version 5. We recommend using the new Environment Import & Export.

:::

Unleash supports import and export of feature flags and strategies at startup and during runtime. The main purpose of the import/export feature is to bootstrap new Unleash instances with feature flags and their configuration. If you are looking for a granular way to keep separate Unleash instances in sync we strongly recommend that you take a look at the Unleash Admin APIs.

The import mechanism guarantees that:

  • all imported features will be non-archived
  • existing updates to strategies and features are included in the event history

All import mechanisms support a drop parameter which will clean the database before import (all strategies and features will be removed).

:::caution Dropping in production Be careful when using the drop parameter in production environments: cleaning the database could lead to unintended loss of data. :::

Runtime import & export

State Service

:::caution Removal notice

State Service has been removed as of Unleash 6.0

:::

Unleash returns a StateService when started, you can use this to import and export data at any time.

const unleash = require('unleash-server');

const { services } = await unleash.start({...});
const { stateService } = services;

const exportedData = await stateService.export({includeStrategies: false, includeFeatureToggles: true, includeTags: true, includeProjects: true});

await stateService.import({data: exportedData, userName: 'import', dropBeforeImport: false});

await stateService.importFile({file: 'exported-data.yml', userName: 'import', dropBeforeImport: true})

If you want the database to be cleaned before import (all strategies and features will be removed), set the dropBeforeImport parameter.

It is also possible to not override existing feature flags (and strategies) by using the keepExisting parameter.

API Export

The api endpoint /api/admin/state/export will export feature-toggles and strategies as json by default. You can customize the export with query parameters:

Parameter Default Description
format json Export format, either json or yaml
download false If the exported data should be downloaded as a file
featureToggles true Include feature-toggles in the exported data
strategies true Include strategies in the exported data
tags true Include tagtypes, tags and feature_tags in the exported data
projects true Include projects in the exported data

For example if you want to download just feature-toggles as yaml:

API Import

:::caution Importing environments in Unleash 4.19 and below

This is only relevant if you use Unleash 4.19 or earlier:

If you import an environment into an instance that already has that environment defined, Unleash will delete any API keys created specifically for that environment. This is to prevent unexpected access to the newly imported environments.

:::

You can import feature-toggles and strategies by POSTing to the /api/admin/state/import endpoint (keep in mind this will require authentication).
You can either send the data as JSON in the POST-body or send a file parameter with multipart/form-data (YAML files are also accepted here).

You can customize the import with query parameters:

Parameter Default Description
drop false If the database should be cleaned before import (see comment below)
keep true If true, the existing feature flags and strategies will not be overridden

If you want the database to be cleaned before import (all strategies and features will be removed), specify a drop query parameter.

:::caution

You should be cautious about using the drop query parameter in production environments.

:::

Example usage:

<ApiRequest verb="post" url="api/admin/state/import" payload={{ "version": 3, "features": [{"name": "a-feature-flag", "enabled": true, "description": "#1 feature-flag"}] }} title="Import data into Unleash."/>

Startup import

You can import flags and strategies on startup by using an import file in JSON or YAML format. As with other forms of imports, you can also choose to remove the current flag and strategy configuration in the database before importing.

Unleash lets you do this both via configuration parameters and environment variables. The relevant parameters/variables are:

config parameter environment variable default value
importFile IMPORT_FILE none path to the configuration file
dropBeforeImport IMPORT_DROP_BEFORE_IMPORT false whether to clean the database before importing the file

Importing files

To import strategies and flags from a file (called configuration.yml in the examples below), either

  • use the importFile parameter to point to the file (you can also pass this into the unleash.start() entry point)

    unleash-server --databaseUrl [...] \
    	       --importFile configuration.yml
    
  • set the IMPORT_FILE environment variable to the path of the file before starting Unleash

    IMPORT_FILE=configuration.yml
    

Drop before import

:::caution You should never use this in production environments. :::

To remove pre-existing feature flags and strategies in the database before importing the new ones, either:

  • add the dropBeforeImport flag to the unleash-server command (or to unleash.start())

    unleash-server --databaseUrl [...] \
    	       --importFile configuration.yml \
    	       --dropBeforeImport
    
  • set the IMPORT_DROP_BEFORE_IMPORT environment variable (note the leading IMPORT_) to true, t, or 1. The variable is case-sensitive.

    IMPORT_DROP_BEFORE_IMPORT=true