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20 lines
1 KiB
Markdown
20 lines
1 KiB
Markdown
<a class="btn btn-lg btn-default" href="/packaging_apps">Application packaging</a>
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### Multi-instance
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Multi-instance is application capacity to be installed several times.
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#### Scripts
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When YunoHost installs the application, it passes `$YNH_APP_INSTANCE_NAME` var to the script, set to value `id__n` with the application `id` coming from the manifest and `n` being an integer incremented each time a new instance of the application is installed.
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**E.g.** in the Roundcube script, database is called `roundcube`, the install directory `roundcube` and the [NGINX configuration](/packaging_apps_nginx_conf) `roundcube`. This way, the second instance of Roundcube will not conflict with the first one, and will be installed in the `roundcube__2` database, in the `roundcube__2`directory, and with the `roundcube__2` NGINX configuration.
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Retrieve app identifier (including the multi-instance id):
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```bash
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app=$YNH_APP_INSTANCE_NAME
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```
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#### Manifest
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Set `multi_instance` variable to `true` in the [manifest](/packaging_apps_manifest):
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```json
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"multi_instance": true,
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```
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