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# Litestream {#module-services-litestream}
[Litestream](https://litestream.io/) is a standalone streaming
replication tool for SQLite.
## Configuration {#module-services-litestream-configuration}
Litestream service is managed by a dedicated user named `litestream`
which needs permission to the database file. Here's an example config which gives
required permissions to access [grafana database](#opt-services.grafana.settings.database.path):
```nix
{ pkgs, ... }:
{
users.users.litestream.extraGroups = [ "grafana" ];
systemd.services.grafana.serviceConfig.ExecStartPost = "+" + pkgs.writeShellScript "grant-grafana-permissions" ''
timeout=10
while [ ! -f /var/lib/grafana/data/grafana.db ];
do
if [ "$timeout" == 0 ]; then
echo "ERROR: Timeout while waiting for /var/lib/grafana/data/grafana.db."
exit 1
fi
sleep 1
((timeout--))
done
find /var/lib/grafana -type d -exec chmod -v 775 {} \;
find /var/lib/grafana -type f -exec chmod -v 660 {} \;
'';
services.litestream = {
enable = true;
environmentFile = "/run/secrets/litestream";
settings = {
dbs = [
{
path = "/var/lib/grafana/data/grafana.db";
replicas = [{
url = "s3://mybkt.litestream.io/grafana";
}];
}
];
};
};
}
```
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