Platform Deployment · PD-04

Apply Host Setup

Apply Host Setup once the host identity and settings are correct. This prepares the host and loads the STRATUM application image without making the application image itself the durable data store.

HOST SETUP

Prepare the host

Apply Host Setup after the host identity and Host Manager settings are correct. The operation prepares the operating system for the selected STRATUM role and loads the supplied STRATUM container image into the configured runtime.

Host setup changes the host; it does not store durable STRATUM state inside the application image. Watch the output through completion and stop on the first reported error instead of continuing to startup.

PROCEDURE

Procedure

Open Apply Host Setup

From the Host Manager Dashboard, press Tab to move focus into the Actions area, then press A for Apply Host Setup. Host Manager asks for confirmation before it changes the host.

Host Manager dashboard showing Apply Host Setup action — FIGURE 01Open Apply Host Setup

STEP 01

Confirm Apply Host Setup

Confirm the Apply Host Setup operation. Host Manager then begins preparing the operating system for the selected STRATUM node role.

Commands

Apply changes the host. Review the plan before proceeding; the operation is separate from starting STRATUM.

shell

# Review changes without modifying the host
./stratum-host plan

# After approval, apply host preparation and load the container image
sudo ./stratum-host apply --yes

STEP 02

Container Image Layers Loading

Host Manager loads the STRATUM OCI image into Docker or Podman as immutable image layers. STRATUM packages platform components across networking, storage, execution, security, and supporting runtime content in these layers. New releases publish new layer digests instead of modifying an existing layer in place, and container registries only transfer layers the target does not already have. That means an update can move only the changed layers instead of retransmitting the entire STRATUM image—the same CI/CD delivery model used for containerized applications, now applied to datacenter infrastructure.

STEP 03

Host Setup System Configuration

Review the host-setup output while STRATUM applies the required system configuration for this node. Stop on any reported error instead of continuing to startup.

STEP 04

Host Setup Services And Network

The final host-setup stage prepares the required services and network settings. Return to Host Manager only after the operation completes cleanly.

MINIMAL & OFFLINE HOSTS

Minimal and offline Ubuntu installations

Minimal Ubuntu Server installations and isolated hosts may not include the optional irqbalance and tuned performance services. STRATUM does not require either service to run, but both can help optimize a host executing many virtual machines: irqbalance distributes device interrupts across available CPUs, while tuned applies host performance profiles.

For Ubuntu hosts, stage the following packages if you intend to use those services. The tuned dependencies are listed explicitly to make preparation of a disconnected package mirror or offline installation media easier.

Ubuntu · optional packages

sudo apt-get install -y \
  irqbalance \
  virt-what \
  python3-linux-procfs \
  python3-pyudev \
  tuned

On an offline host, use a local Ubuntu package repository or approved installation media that matches the host's Ubuntu release and architecture; include any additional package dependencies. The command above uses the configured APT sources and will not download packages on a disconnected system unless those sources are reachable locally.

RESULT

The outcome you should see

Host Setup finishes without an error, the STRATUM image is loaded into the selected container runtime, and the host is ready for the remaining Host Manager configuration.