This example demonstrates how to connect existing Docker images or containers to a SEED emulation network. You can add custom containers when generating deployment configurations or connect containers to an existing network after the emulation has started. By configuring network connections, IP addresses, and default routes, applications inside these containers can communicate with emulated nodes. You can build on this approach to integrate existing web services, testing tools, or custom programs and further customize your experiments.
Add existing containers
In some cases, we already have an existing container image, and we want
some of the containers in the emulator to use this image. There are two
methods to do this.
Method 1
In this method, we add existing containers when building the emulator.
We have implemented this feature in the Docker compiler class. The basic idea
is to tell the compiler that we want to attach an existing container to
a network inside the emulator. The compiler will then generate the corresponding
entry inside the docker-compose.yml file.
In this method, we add the existing containers after we have built the emulator.
Using this method, we first start the emulator, and then start the additional containers
from the existing images. We attach these containers to the networks created by the emulator.
This way, the new containers becomes part of the emultion.
