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Specify SHA syntax for images (#18774)

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* Specify SHA syntax

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* Update overview.md

* Update content/en/docs/concepts/configuration/overview.md

Co-Authored-By: Tim Bannister <tim@scalefactory.com>

Co-authored-by: Tim Bannister <tim@scalefactory.com>
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Eli Arbel
2020-02-24 03:10:47 +02:00
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@@ -87,7 +87,7 @@ The [imagePullPolicy](/docs/concepts/containers/images/#updating-images) and the
- `imagePullPolicy: Never`: the image is assumed to exist locally. No attempt is made to pull the image.
{{< note >}}
To make sure the container always uses the same version of the image, you can specify its [digest](https://docs.docker.com/engine/reference/commandline/pull/#pull-an-image-by-digest-immutable-identifier), for example `sha256:45b23dee08af5e43a7fea6c4cf9c25ccf269ee113168c19722f87876677c5cb2`. The digest uniquely identifies a specific version of the image, so it is never updated by Kubernetes unless you change the digest value.
To make sure the container always uses the same version of the image, you can specify its [digest](https://docs.docker.com/engine/reference/commandline/pull/#pull-an-image-by-digest-immutable-identifier); replace `<image-name>:<tag>` with `<image-name>@<digest>` (for example, `image@sha256:45b23dee08af5e43a7fea6c4cf9c25ccf269ee113168c19722f87876677c5cb2`). The digest uniquely identifies a specific version of the image, so it is never updated by Kubernetes unless you change the digest value.
{{< /note >}}
{{< note >}}