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25 lines
1.0 KiB
Markdown
25 lines
1.0 KiB
Markdown
# Reloader
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This controller watches for changes to `ConfigMap` and `Secret` objects and performs rolling upgrades on their associated deployments, deamonsets and statefulsets and updating dynamically.
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This is particularly useful if the `ConfigMap` is used to define environment variables - or your app cannot easily and reliably watch the `ConfigMap` and update itself on the fly.
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**NOTE:** This controller has been inspired from [configmapController](https://github.com/fabric8io/configmapcontroller)
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## How to use Reloader
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For a `Deployment` called `foo` have a `ConfigMap` called `foo`. Then add this annotation to your `Deployment`
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```yaml
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metadata:
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annotations:
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reloader.stakater.com/update-on-change: "foo"
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```
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Then, providing `Reloader` is running, whenever you edit the `ConfigMap` called `foo` the Reloader will update the `Deployment` by adding the environment variable:
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```
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STAKATER_FOO_REVISION=${reloaderRevision}
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```
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This then triggers a rolling upgrade of your deployment's pods to use the new configuration. |