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Docker Engine

Terraform Enterprise requires at least one of the following Docker Engine configurations, in order of preference:

  1. Docker Engine 20.10.x or 19.03.x with runc v1.0.0-rc93 or greater.
  2. Docker Engine 20.10.x or 19.03.x with libseccomp 2.4.4 or greater.
  3. Docker Engine 20.10.x or 19.03.x with a modified libseccomp profile.
  4. Docker Engine 1.13.1 from the Extra Packages for Enterprise Linux (EPEL) repository using a modified libseccomp profile.

On a first install of Terraform Enterprise (online install), Docker can be automatically installed with all necessary dependencies. Upgrades to Terraform Enterprise will not automatically upgrade Docker. Docker should be regularly updated to ensure stability and security.

Note: If you install Docker manually, Terraform Enterprise is not capable of verifying the Docker Engine configuration automatically.

Docker Engine With a Compatible runc Version

  1. Install a supported Docker Engine version.

  2. Install the latest version of containerd for your operating system.

    On Debian/Ubuntu:

    sudo apt install containerd

    On RHEL/CentOS:

    sudo yum install containerd.io

  3. Confirm that the installed containerd version is 1.4.9, 1.5.5, or greater.

    containerd --version

  4. Confirm that the installed runc version is v1.0.0-rc93 or greater:

    runc --version

  5. If your Docker Engine and runc versions meet the requirements from previous steps, your system is properly configured. Otherwise, proceed to option 2.

Docker Engine With a Compatible libseccomp Version

Note: These instructions should only be used if your operating system does not meet the requirements detailed in Docker Engine With a Compatible runc Version.

  1. Install a supported Docker Engine version.

  2. Install the latest version of libseccomp for your operating system.

    On Debian/Ubuntu:

    sudo apt install libseccomp2

    On RHEL/CentOS:

    sudo yum install libseccomp

  3. Confirm that the installed libseccomp version is 2.4.4 or greater.

    runc --version

  4. If your Docker Engine and libseccomp versions meet the requirements from previous steps, your system is properly configured. Otherwise, proceed to option 3.

Docker Engine Using a Modified libseccomp Profile

Note: These instructions should only be used if your operating system does not meet the requirements detailed in either Docker Engine With a Compatible runc Version or Docker Engine With a Compatible libseccomp Version.

  1. Install a supported Docker Engine version.

  2. Check if the file /etc/docker/seccomp.json exists. If it does, proceed to step 4.

  3. Download the default moby libseccomp profile and save it to the file /etc/docker/seccomp.json.

    sudo curl -L -o /etc/docker/seccomp.json \
  https://raw.githubusercontent.com/moby/moby/master/profiles/seccomp/default.json

  4. In the /etc/docker/seccomp.json file, change "defaultAction": "SCMP_ACT_ERRNO", to "defaultAction": "SCMP_ACT_TRACE",.

    sudo sed -i 's/"defaultAction":\s*"SCMP_ACT_ERRNO"/"defaultAction": "SCMP_ACT_TRACE"/1' /etc/docker/seccomp.json

    Docker Engine 1.13.1 (RHEL only): After modifying the /etc/docker/seccomp.json file, proceed to step 8.

  5. Create a drop-in systemd unit file for the docker systemd service.

    sudo cp /lib/systemd/system/docker.service /etc/systemd/system/docker.service

  6. Edit the drop-in /etc/systemd/system/docker.service systemd unit file and modify the line starting with ExecStart= to include the option --seccomp-profile=/etc/docker/seccomp.json.

    For example, the following line:

    ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_ADD_RUNTIMES

    Would become:

    ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --seccomp-profile=/etc/docker/seccomp.json $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_ADD_RUNTIMES

  7. Reload the systemd daemon.

    sudo systemctl daemon-reload

  8. Restart Docker Engine.

    sudo systemctl restart docker