Notary is Docker's platform to provide trusted delivery of content by signing images that are published. A content publisher can then provide the corresponding signing keys that allow users to verify that content when it is consumed. Artifactory fully supports working with Docker Notary to ensure that Docker images uploaded to Artifactory can be signed, and then verified when downloaded for consumption. When the Docker client is configured to work with Docker Notary, after pushing an image to Artifactory, the client notifies the Notary to sign the image before assigning it a tag.
Artifactory supports hosting signed images without the need for any additional configuration.
Configuring Docker Notary and Docker Client
There is no configuration needed in Artifactory in order to work with trusted Docker images. However, in the setup instructions below, we do recommend testing your configuration by signing Artifactory and running it in a container.
To configure the Docker Notary and client to work with Artifactory, execute the following main steps:
- Configure your hosts file
- Configure the Notary server and run it as a container
- Configure the Docker client
Configuring Your Hosts File
If you are not working with a DNS, add the following entries to your
Configuring the Notary Server
Create a directory for your Notary server. In the code snippets below we will use
Create a dockerfile with the following content:
Use a private certificate
This configuration runs with a public certificate. Any Docker client running with the same public certificate may be able to access your Notary server.
For a secure setup, we recommend replacing it with your organization's private certificate by replacing the public
root-ca.crt certificate file
/root/notary/fixtures on your Notary server, and under
/usr/local/share/ca-certificates on the machine running your Docker client.
Build the test image:
If you are running the build in your dockerfile directory, you can just use "." as the path to the dockerfile
Start the Notary server:
To start the Notary server, you first need to have Docker Compose installed.
Then execute the following steps:
Configuring the Docker Client
To connect the Notary server to the Docker client you need to enable the Docker content trust flag and add the Notary server URL as follows:
Test Your Setup
The example below demonstrates setting up the Notary server and Docker client, signing an image and the pushing it to Artifactory, with the following assumptions:
- Notary server and Artifactory run on localhost (127.0.0.1)
- Notary server is in directory
- Working without a DNS (so we need to configure the hosts file)
- Notary server name is
- Artifactory server name is
- Docker Compose is installed
Set up the IP mappings
Create the Dockerfile
Note that this example uses the public
Navigate to the Dockerfile location and build the test image
Run Artifactory as a container
Access your Artifactory instance (at
http:/localhost:8081/artifactory) and activate it with an Artifactory Pro license.
For more details on running Artifactory as a Docker container, please refer to Installing with Docker.
Start your container
In this step you will start the container with the
dockerfile you created earlier, and link it to your Notary server and Artifactory.
Pull an image for testing
After you have pulled the image, you need to
docker login to
Configure the Docker client
Tag the image you pulled for testing and push it to Artifactory
You will be asked to enter the root key passphrase. This will be needed every time you push a new image while the DOCKER_CONTENT_TRUST flag is set.
The root key is generated at:
You will also be asked to enter a new passphrase for the image. This is generated at
/root/.docker/trust/private/tuf_keys/[registry name] /[imagepath]