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Merge pull request #9619 from adrian-plata/DCT-note 

Add DCT Linux note
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Adrian Plata 2019-10-11 09:55:29 -07:00 committed by GitHub
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12
engine/security/trust/content_trust.md
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@ -99,7 +99,8 @@ read how to [manage keys for DCT](trust_key_mng.md).
## Signing Images with Docker Content Trust
> Note this applies to Docker Community Engine 17.12 and newer, and Docker
> **Note:**
> This applies to Docker Community Engine 17.12 and newer, and Docker
> Enterprise Engine 18.03 and newer.
Within the Docker CLI we can sign and push a container image with the
@ -217,7 +218,8 @@ Successfully deleted signature for dtr.example.com/admin/demo:1
## Runtime Enforcement with Docker Content Trust
> Note this only applies to Docker Enterprise Engine 18.09 or newer. This
> **Note:**
> This only applies to Docker Enterprise Engine 18.09 or newer. This
> implementation is also separate from the `only run signed images` feature of
> [Universal Control Plane](/ee/ucp/admin/configure/run-only-the-images-you-trust/)
@ -233,7 +235,8 @@ Engine Signature Verification prevents the following:
* `$ docker pull` of an unsigned or altered image.
* `$ docker build` where the `FROM` image is not signed or is not scratch.
> **Note**: The implicit pulls and runs performed by worker
> **Note:**
> The implicit pulls and runs performed by worker
> nodes for a [Swarm service](/engine/swarm/services.md) on `$ docker service create` and
> `$ docker service update` are also verified. Tag resolution of services
> requires that all nodes in the Swarm including managers have content trust
@ -251,6 +254,9 @@ DCT is controlled by the Docker Engine's configuration file. By default this is
found at `/etc/docker/daemon.json`. More details on this file can be found
[here](/engine/reference/commandline/dockerd/#daemon-configuration-file).
> **Note:**
> This configuration can be set on Linux machines **only**.
The `content-trust` flag is based around a `mode` variable instructing
the engine whether to enforce signed images, and a `trust-pinning` variable
instructing the engine which sources to trust.