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CAS for Development

We explain how to start a SCONE CAS instance for development. This CAS instance runs inside a debug enclave, i.e., do not use this for production mode. For setting up a production mode CAS, send us an email.

Public CAS for development

We have setup a CAS instance for testing and development, which is available for general use at This instance runs in pre-release mode, i.e., do not use this instance for production.

Pulling CAS Image

To start CAS, you first pull CAS Docker image to your local registry. To be able to do so, please ask us via email for access to CAS. We will give you access to a private Docker repository and we will send you the name of the private repository.

For this tutorial, please set the environment variable CAS to the name of the Docker repository - typically this might look something like this:

export CAS=sconecuratedimages/$MYCOMPANY:cas

Pull the CAS image like this:

docker pull $CAS

If this fails, ensure that you are logged into docker (via docker login) and that you set environment variable CAS properly.

Starting and Stopping CAS

The easiest way to start CAS is to use a simple Docker compose file. To do so, create a new directory for the Docker compose file:

mkdir -p CAS
cd CAS

Create a compose file that exposes the ports of CAS to the host:

cat > docker-compose.yml <<EOF
version: '3.2'
        command: sh -c "SCONE_HEAP=1G cas -c /etc/cas/cas.toml"
         - SCONE_LOG=7
         - SCONE_MODE=HW
        image: $CAS
          - "/dev/isgx"
          - target: 8081
            published: 8081
            protocol: tcp
            mode: host
          - target: 18765
            published: 18765
            protocol: tcp
            mode: host

Now start CAS in the background as follows:

docker-compose up -d cas

By executing

docker-compose logs cas

you will see the output of CAS.

You can check if CAS is still running by executing:

docker-compose up -d cas

This will result in an output like

cas_cas_1 is up-to-date

You can stop CAS by executing:

docker-compose stop cas

©, June 2019. Questions or Suggestions?