selfhostblocks/modules/blocks/sanoid/docs/default.md

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# Sanoid Block {#blocks-sanoid}
Defined in [`/modules/blocks/sanoid.nix`](@REPO@/modules/blocks/sanoid.nix):
```nix
{
imports = [
inputs.selfhostblocks.nixosModules.sanoid
];
}
```
## Provider Contracts {#blocks-sanoid-contract-provider}
This block provides the following contracts:
- [backup contract](contracts-backup.html) under the [`shb.sanoid.backup`][backup] option.
It is tested with the [generic contract tests][backup contract tests].
[backup]: #blocks-sanoid-options-shb.restic.backup
[backup contract tests]: @REPO@/test/contracts/backup.nix
## Usage {#blocks-sanoid-usage}
Sanoid uses templates to know when snapshots should be kept or pruned.
### Default Template {#blocks-sanoid-usage-default-template}
Backup a dataset using the default Sanoid template:
```nix
{
shb.zfs.pools.root.datasets.home = {
path = "/home";
};
shb.sanoid.backup."root/home" = { };
}
```
### Custom Template {#blocks-sanoid-usage-custom-template}
Create a custom template and use it:
```nix
{
shb.zfs.pools.root.datasets.home = {
path = "/home";
};
services.sanoid.templates."yearly" = {
hourly = 10;
daily = 3;
monthly = 3;
yearly = 2;
};
shb.sanoid.backup."root/home" = {
template = "yearly";
};
}
```
Note we use the upstream `services.sanoid.templates` option to define the templates.
### Custom Template {#blocks-sanoid-usage-custom-template}
Create a custom template and use it:
```nix
{
shb.zfs.pools.root.datasets.home = {
path = "/home";
};
shb.sanoid.backup."root/home";
}
```
## Options Reference {#blocks-sanoid-options}
```{=include=} options
id-prefix: blocks-sanoid-options-
list-id: selfhostblocks-blocks-sanoid-options
source: @OPTIONS_JSON@
```