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Chapter 2. Options for embedding MicroShift applications in a RHEL for Edge image
You can embed microservices-based workloads and applications in a Red Hat Enterprise Linux for Edge (RHEL for Edge) image to run in a MicroShift cluster. Embedded applications can be installed directly on edge devices to run in air-gapped, disconnected, or offline environments.
2.1. Adding application RPMs to an rpm-ostree image
If you have an application that includes APIs, container images, and configuration files for deployment such as manifests, you can build application RPMs. You can then add the RPMs to your RHEL for Edge system image.
The following is an outline of the procedures to embed applications or workloads in a fully self-contained operating system image:
- Build your own RPM that includes your application manifest.
- Add the RPM to the blueprint you used to install Red Hat build of MicroShift.
- Add the workload container images to the same blueprint.
- Create a bootable ISO.
For a step-by-step tutorial about preparing and embedding applications in a RHEL for Edge image, use the following tutorial:
2.2. Adding application manifests to an image for offline use
If you have a simple application that includes a few files for deployment such as manifests, you can add those manifests directly to a RHEL for Edge system image.
See the "Create a custom file blueprint customization" section of the following RHEL for Edge documentation for an example:
2.3. Embedding applications for offline use
If you have an application that includes more than a few files, you can embed the application for offline use. See the following procedure:
