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Persist Service State

docs/current_docs/partials/cookbook/builds/_persist-service-state.mdx

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Persist service state across runs

The following Dagger Function uses a cache volume to persist a Redis service's data across Dagger Function runs.

<Tabs groupId="language" queryString="sdk"> <TabItem value="go" label="Go">
go
</TabItem> <TabItem value="python" label="Python">
python
</TabItem> <TabItem value="typescript" label="TypeScript">
typescript
</TabItem> </Tabs>

Example

  • Save data to a Redis service which uses a cache volume to persist a key named foo with value `123:

    <Tabs groupId="shell"> <TabItem value="System shell"> ```shell dagger -c 'set foo 123' ``` </TabItem> <TabItem value="Dagger Shell"> ```shell title="First type 'dagger' for interactive mode." set foo 123 ``` </TabItem> <TabItem value="Dagger CLI"> ```shell dagger call set --key=foo --value=123 ``` </TabItem> </Tabs>

  • Retrieve the value of the key foo after recreating the service state from the cache volume:

    <Tabs groupId="shell"> <TabItem value="System shell"> ```shell dagger -c 'get foo' ``` </TabItem> <TabItem value="Dagger Shell"> ```shell title="First type 'dagger' for interactive mode." get foo ``` </TabItem> <TabItem value="Dagger CLI"> ```shell dagger call get --key=foo ``` </TabItem> </Tabs>